Digital Flow Control System - taiyo-ltd.co.jp Flow Contr… · Digital Flow Control System Digital...
Transcript of Digital Flow Control System - taiyo-ltd.co.jp Flow Contr… · Digital Flow Control System Digital...
Digital Flow
Control S
ystem
Digital Flow Control System
Product Configuration/Handling Instructions…VM2
Digital Flow Switches…VM12 Digital Flow Sensors…VM20
Digital Flow Meters…VM24
Flow Sensors EFS2…VM32 Flow Switches EFS3…VM36
Leak Detectors……VM28
Digital FlowControl System
Digital Flow Control System
2VM Digital Flow
Control SystemDigital Flow
Control S
ystem3
VM
min
DFM2-1000
Digital Flow Switch
Digital Flow Switch+Digital Flow MeterCombination for reading flow rate and transmitting interlock signal when flow rate is insufficient
Note) When a Digital Flow Switch is used as a sensor
DFS3-1002DFS3-5002DFS3-1000DFS3-2000DFS3-2500DFS3-1200DFS3-1500DFS3-5000
+(DFM2-1000)( (
Flow rate level
Type
Detection method
Model
Material of body
Low Medium Large
Plastic bodyMagnetic proximity/
iron proximity
DFS3−1002/5002
Polyacetal (glass-filled)
Plastic body(standard type)
Magnetic proximity/iron proximity
DFS3−1000/5000
Polyacetal (glass-filled)
Metallic body
DFS3−1200
BC6 (nickel-plated)
Magnetic proximity
Stainless steel body
DFS3−1500
SCS14
Metallic body
DFS3−2000
BC6 (nickel-plated)
Stainless steel body
DFS3−2500
SCS14
min
DFM2-1000
Digital Flow Sensor+Digital Flow Meter
DFT-1000 DFM2-1000
Combination only for reading flow rate
●Various vacuum machines, such as vacuum deposition units●Semiconductor manufacturing machines●Spot welding machines (including chip drop detectors)●Laser beam machines●Electronic microscopes●X-ray●Water treatment plants●Atomic power plants●Others
Application Examples
Explanation of Operation
Trimmer
Green
Power supply
NC: Contact B
COMMON
NO: Contact A
Frequency output (+)
Frequency output (ー)
Red
LED
Trimmer
Green
Power supply
OUT-HIGH
OUT-LOWOUT-COM
Frequency output (+)
Frequency output (ー)
Red
LED
Regulator Regulator
Peripheral setter
Peripheralcomparator
Delay circuit
Relay output type Open collector output type
The rotor rotates at a speed in proportion to the liquid flow rate. The rotations of the rotor are detected by the sensor on the body side and converted to electric pulse signals. Unlike electromotive sensors using coils, the digital type sensor constantly gives rectangular waves with a uniform crest value irrespective of the rotor speed.The pulse period is compared with the period preset with the trimmer, and, when the period exceeds the setting (the flow late becomes lower than the setting), an alarm is output, and the output lamp (red) lights. To prevent output of unnecessary alarms caused by flow rate ripple and instantaneous interruption, the delay circuit shown in the figure is used to output an alarm only when the period is kept more than the setting for 500 ms.
Peripheral setter
Delay circuit
Peripheralcomparator
Product Confi guration Product Confi guration
Digital FlowControl System
Digital Flow Control System
4VM Digital Flow
Control SystemDigital Flow
Control S
ystem5
VM
DFS3
Red:+24 V DC
Black:0 V
Gray:Earth・・・・・Grounding
Brown:Relay b contact
Green:Relay a contact
Yellow:Relay common
Alarm output
Blue:Frequency output (+)
White:Frequency output (-)
Flow rate signalConnected to Digital Flow Meter DFM2
alarm
freq.
DFS3REG.
F
alarm
freq.
White:100 V AC
Black:100 V AC
Green:Earth・・・・・Grounding
Black:Relay b contact
Green:Relay a contact
Yellow:Relay common
Alarm output
Red:Frequency output (+)
White:Frequency output (-)
Red:+24 V DC
Black:0 V
Gray:Earth・・・・・Grounding
Brown:OUT-HIGH
Green:OUT-LOW
Yellow:OUT-COM
Alarm output
Blue:Frequency output (+)
White:Frequency output (-)
DFS3
alarm
freq.
DFS3
REG.
F
alarm
freq.
White:100 V AC
Black:100 V AC
Green:Earth・・・・・Grounding
Black:OUT-HIGH
Green:OUT-LOW
Yellow:OUT-COM
Alarm output
Red:Frequency output (+)
White:Frequency output (-)
●Use the flow switch within the specified ambient temperature range keeping the working fluid within the specified temperature range. If it is used at an improper temperature, the rotor magnet may decrease in magnetic force, output switching failure may occur, and the switch life may be reduced.
●Use the flow switch within the specified flow rate range. The flow rate range varies depending on the fluid viscosity and temperature. Therefore, it is recommended to cause an abnormal flow rate on the actual equipment to set the trimmer.●If there are air bubbles in the flow switch or the fluid, the rotor speed will be higher than usual, and the flow rate at which an alarm is output will change. Pipe the flow switch appropriately to keep the inside of the switch filled with water by, for example, raising the piping on the downstream side of the switch.Flush the piping in advance to remove dust and foreign particles from the inside.
●If the working fluid contains rust, metallic particles, dust or other polishing substances, fit a filter on the upstream side of the flow switch. When a magnetic proximity type flow switch is used, iron particles in the fluid will adhere to the rotor magnet, and the switch may malfunction.●Check the supply voltage of the flow switch to be used and the load voltage and current specifications. If the voltage or current is improper, the flow switch may malfunction or be damaged.
●When a plastic body type flow switch is used in a place where the switch may be exposed to heat cycles or heat shock, use piping adapters. When connecting pipes directly on the plastic body, keep the tightening torque in a range from 5 to 10 N・m.
●When wiring the flow switch, disconnect the power from the equipment on the electric circuit to be connected. Failure to do so may expose the worker to shock hazard or damage the Digital Flow Switch or load during wiring work.●Check the supply voltage of the Digital Flow Switch to be used and the load voltage and current specifications. If the voltage or current is improper, the Digital Flow Switch may malfunction or be damaged.
●Take care not to apply bending, tensile or torsional load to the cable. Doing so may break the cable.●If the distance of the cable to the destination is long, secure the cable at intervals of 20 cm to prevent looseness of the cable. If the cable is loose, someone may catch his foot on the cable, thereby breaking it.
●When the cable is laid on the ground, it may be stepped on directly or put under equipment and may be broken or short-circuited. Protect it with a metallic conduit or the like.
●Do not bundle the cable together with the high-voltage wires of other electric devices or power source cables. Do not lay the cable close to these wires, cables or power sources. Noises from the high-voltage wires, power sources or power source cables will enter the Digital Flow Switch cable and cause the Digital Flow Switch and load to malfunction. It is recommended to protect the cable with a shield tube or the like.Do not shield the power cable of the 100-VAC type switch together with its signal cable.●The earth wire is designed to protect the Digital Flow Switch from power supply line noise and power supply overvoltage. It is recommended to perform class 3 grounding.
Relay output type●DC
●AC
●AC
Open collector output type●DC
DFS3 Series Digital Flow SwitchesNotes on use Wiring procedures
Notes on wiring
Flow rate signalConnected to Digital Flow Meter DFM2
Flow rate signalConnected to Digital Flow Meter DFM2
Flow rate signalConnected to Digital Flow Meter DFM2
●When wiring the flow switch, disconnect the power from the equipment on the electric circuit to be connected. Failure to do so may expose the worker to shock hazard or damage the Digital Flow Switch or load during wiring work.●Connect a load to each output contact. If a power supply is directly connected without a load, the contact may be melted down or burnt out.●Avoid using the switch with the alarm output relay kept outputting for a long time (e.g. to detect abnormal increase in flow rate). If it is used in such a manner, the temperature rise of the output relay coil may accelerate corrosion of the contact. In such a case, it is recommended to select an open collector output type switch.●Use the output contacts within the contact capacity range. If the maximum contact capacity is exceeded during use, nonconformities, such as contact abnormal wear, breaking failure, meltdown and burnout, may be caused.
●When the output contacts are used on a minute current circuit, conducting failure is easily caused due to adsorption of oxides and carbides to the contacts. For a minute current circuit, it is recommended to select an open collector output type switch.
●Never configure a circuit on which overcurrent or contact burnout may occur when the three output contacts, NC, NO and COM, are short-circuited.
●When connecting an induction load, such as a DC relay, using an output contact, take surge absorption measures, such as a diode. When the induction load circuit is opened, back excitation voltage of several hundred to several thousand volts is generated, and electricity is discharged from the contact. Organic substances in the air are decomposed by this discharge, and oxides and carbides are generated on the contact, thereby causing contact failure. In addition, transfer of contact is caused, and the contact may be locked.
●When using a protective element, it is necessary to install the element close to the load or contact. If it is located far from the load or contact, it may not exert a sufficient effect. Install it within 50 cm from the load or contact.
●If the lead wire connecting an output contact and a load is more than 10 m long or a contact is connected to an AC input type PLC (programmable controller) or a capacitive load (capacitor, etc.), rush current is generated when the output is turned on. Provide a protective circuit as shown in the drawing.
As standard for capacitor: 0.5 to 1 (μF) for current of 1 mAAs standard for resistance: 0.5 to 1 (Ω) for contact current of 1 V
Use a diode whose reverse breakdown voltage is higher by 10 times or more than the circuit voltage and whose forward current is higher than the load current.
Select the cut-off voltage, Vc, to meet the following condition. In the case of AC, it is necessary to multiply the voltage by √2.Max. contact voltage>Vc>supply voltage×1.5
●If a protective circuit as shown above is not provided, the internal electric circuit of the Digital Flow Switch may be damaged by rush current.
R:rush current limiting resistance
R=Use as large a resistance as possible within the range allowed by the circuit on the load side.
Note) If the resistance is too large, the load may not operate.Connect the resistance as close to the sensor as possible. (Within 2 m)
L:choke coilL=equivalent to about 2 mHNote) Connect the
resistance as close to the sensor as possible. (Within 2 m)
●If the Digital Flow Switch is used in an atmosphere with moisture and a load which is apt to generate arcs is connected to the output contact, metallic parts in the output relay may be corroded, thereby causing operation failure. Use the switch at an ambient humidity of 85%RH or less (at an ambient temperature of 20℃).●Do not switch a large load and a minute load with one output relay. Particles scattered from the contact when the large load is switched may adhere to the switching contact of the minute load and affect the contact operation.
●When a semiconductor is driven by an output contact, it may response to bounce or chattering of the contact. In such a case, it is recommended to select an open collector output type switch.
●When the contact A of the output relay is used, the contact is closed while the actual flow rate is less than the set flow rate.●The output relay is driven while the actual flow rate is lower than the set flow rate. Therefore, if power is disconnected for some reason, the output contact is set to the same state as when the actual flow rate is higher than the set flow rate. When designing the system, take this into consideration.
Output contact
NC NOCOM
Load
Output contact
NC NOCOM
Small loadLarge loadInduction load, capacitive load, etc.
Resistive load of several mA or less, etc.
DFS3
DC・AC
DFS3Inductionload
DC
DFS3
DC・AC
DFS3
Within 2 mResistanceR
ACExternal power supply
PLC
COM
DFS3
Within 2 m
L
ACExternal power supply
PLC
COM
DFS3
Within 2 m 10 m or more or capacitive loadResistanceR
Load
AC・DC
DFS3
Within 2 m 10 m or more or capacitive load
LLoad
AC・DC
Relay output typeNotes on use of output relay Notes on contact protection
Inductionload
Inductionload
Handling Instructions Handling Instructions
Digital FlowControl System
Digital Flow Control System
6VM Digital Flow
Control SystemDigital Flow
Control S
ystem7
VM
●When wiring the flow switch, disconnect the power from the equipment on the electric circuit to be connected. Failure to do so may expose the worker to shock hazard or damage the Digital Flow Switch or load during wiring work.●Do not use the Digital Flow Switch out of the working voltage range (max. allowable voltage is 50 V DC). If voltage higher than the working voltage range is applied or AC power is applied to the switch, internal elements may be damaged or burnt out.
Connection with PLC (programmable controller)●When the PLC has a built-in power supply
●When several Digital Flow Switch outputs are connected in parallel to a load (e.g. to input to a PLC on an OR circuit), check for Digital Flow Switch output leakage current.The load may operate due to the leakage current.
Leakage current per output: ⅠCEO≦0.1 mA (VCEO=80V Ta=25℃)
●When several Digital Flow Switch outputs are connected in series to a load (e.g. to input to a PLC on an AND circuit), check for Digital Flow Switch output residual voltage.The load may not operate due to the output residual voltage.
Output residual voltage per output: VCEO≦0.8 V ( ⅠC=10mA Ta=25℃)
The resistance shall be as high as the load resistance, and the capacitor value shall be determined by experiment.
Select a diode whose reverse breakdown voltage is 5 to 10 times higher than the circuit voltage and whose forward current is higher than the circuit current.
Determine the barrister cut-off voltage, Vc, under the following condition:Supply voltage<Vc<80 V
●When an induction load, such as a DC relay, is connected, take surge absorption measures, such as a diode. The back excitation voltage generated on the load when the output is turned off may damage the output element of the Digital Flow Switch.
Note) For details, read carefully the instruction manual for the PLC.
●When the PLC does not have a built-in power supply
Note) For details, read carefully the instruction manual for the PLC.
●Do not short-circuit the load.Internal elements may be damaged or burnt out.
●Take care not to wire the power supply in reverse polarity.Internal elements may be damaged or burnt out.
●Wire the power supply with a load. If the power supply is directly connected without a load, internal elements may be damaged or burnt out.
Open collector output type
DFS3Load
AC power supply
DFS3
Short-circuiting of load
+-
DFS3
+-
Improper polarity
DFS3No load
+-
Input terminalInternal power supplyDCCOM
PLC
DFS3
Input terminalDC power supply COM
PLC
DFS3
DFS3+-
DFS3+-
DFS3+-
Notes on use of open collector output type switch
Notes on protection of output circuitLoad
Load
Inductionload
Inductionload
Inductionload
●Select a required flow rate range from the flow ranges A and B, and screw the supplied plug into the unnecessary range port.
Note) DFS3-2000 and 2500 do not have range selectors.
■Fitting the piping adapter set (DF-AP) Screw the piping adapter completely until the adapter contact surface gets into close contact with the body side face.
Tightening torque: 15 to 20 N・m 〈DFS3-1000・5000〉
Notes)・This figure shows how to fit the adapter when the range A is used.The piping adapter can be fitted to A and B.
・Fit the plug in accordance with the plug fitting procedures.
●Before connecting the pipes, flush them. Take care that sealing tape cuttings, dust and rust do not enter the pipes.
Note) When connecting the pipe to the piping adapter, use a sealing tape, and tighten the pipe to a torque of 5 to 10 N・m. (Wrap two layers or less of the sealing tape.)
■Fitting the piping adapter set for low flow rate (DF-FW2)●To pipe a low-flow rate type switch, insert the supplied nozzle on the IN side in the flowing direction of the range A, fit the sealing O-ring, and screw the low-flow piping adapter.
Tightening torque: 5 to 10 N・m●The piping adapter supplied with the low-flow type switch shall be fitted together with the sealing O-ring on the OUT side in the flowing direction of the range A only when required.
Tightening torque: 5 to 10 N・m Note) The adapter with V grooves in the hexagon surfaces is the
low-flow piping adapter. If the low-flow piping adapter and the piping adapter are fitted to wrong positions, the liquid may leak, or the port may be broken. Fit them carefully.
〈DFS3-1002・5002〉
Notes)・This figure shows how to fit the adapters for feeding water in the arrow direction. ・Fit the plug in accordance with the plug fitting procedures.
Notes)・If the low-flow nozzle has not been fully inserted, the low-flow piping adapter cannot be screwed in completely. Insert the low-flow nozzle surely.
・Screw the adapter completely until the adapter contact surface gets into close contact with the body side surface.
●Before connecting the pipes, flush them. Take care that sealing tape cuttings, dust and rust do not enter the pipes.
Note) When piping the low-flow piping adapter and piping adapter, use a sealing tape, and tighten the pipes to a torque of 5 to 10 N・m. (Wrap two layers or less of the sealing tape.)
Example)●When the set flow rate is 1 ℓ/min (steady flow rate is 2 ℓ/min) and the primary pressure is 0.2 MPa, select the range A, and fit the plug to the range B port.
●When the set flow rate is 3 ℓ/min (steady flow rate is 6 ℓ/min) and the primary pressure is 0.1 MPa, select the range B, and fit the plug to the range A port.
Notes)●When fitting the plug to DFS3-1000 or 5000, use the supplied sealing O-ring. The plug is made of plastic. Tighten it to a torque of 3 to 4 N・m.
●When fitting the plug to DFS3-1200 or 1500, use a sealing tape.
Caution: Do not use any plug other than the supplied one.
Range ARange B
Sealing O-ring
Plug
Range ARange BPlugUse sealing tape.
Piping adapter
Plug
Sealing O-ring
Plug
Sealing O-ring
Piping adapter
Range A
Range B
Flowing direction
Low-flow nozzle
Low-flow piping adapter
V groove for discrimination
Piping adapter
Plug
Sealing O-ring
Plug
Sealing O-ring
O-ring for nozzle
DFS3-1000DFS3-5000
DFS3-1200DFS3-1500
Plug fitting procedures
Piping adapter fitting procedures
Tightening Torque Table Unit:N・m
Part to be tightened
Direct piping to plastic body
Fitting of plastic plug
Fitting of piping adapter
Fitting of low-flow piping adapter
Piping to piping adapter
Fitting of plastic body, M5×0.8
Tightening torque range
5 to 103 to 4
5 to 10
1.2 to 1.8
Note 1)
Note 1) For the plastic body type switch, it is recommended to use the piping adapters. (Wrap two layers or less of the sealing tape.)
Handling Instructions Handling Instructions
Digital FlowControl System
Digital Flow Control System
8VM Digital Flow
Control SystemDigital Flow
Control S
ystem9
VM
The body can be installed in any direction. When installing, observe the following instructions.
①To suspend the Digital Flow Switch with steel piping
Note) If DFS3-100* or 500* having a plastic body is installed in this manner, the ports may be damaged. It is recommended to fit the piping adapter DF-AP (accessory).
②To screw one side onto steel piping and connect a plastic tube to the other side
Note) If DFS3-100* or 500* having a plastic body is installed in this manner, the ports may be damaged. It is recommended to fit the piping adapter DF-AP (accessory).
③To secure the body on a plate and connect plastic tubes
Note) Tighten the mounting screws to a torque of 1.2 to 1.8 N・m. (DFS3-100*/500*)
●Never remove the cover. (If the cover is removed by the user and the switch is disabled, the repair is not covered by warranty.)●Insert the supplied rotor cap opener into the rotor cap groove, and turn it counterclockwise. Then, the rotor cap, rotor and rotor pin can be easily disassembled.●When reassembling, apply a thin layer of grease to the rotor cap O-ring zone except DFS3-1500 and 2500. Silicone grease or Teflon grease is recommended. When applying grease to DFS3-1500 or 2500, use grease suitable for the fluid used.●If the rotor magnet is covered with iron particles when the switch is disassembled, use a cleaner suitable for the fluid used. If the magnet is left covered with the particles, the sensor may not detect the magnet.
Note) Strap the rotor cap opener near the flow switch so that it can be readily used.
Rotor pin
Rotor
Rotor cap
Rotor cap opener
BodyCover
List of Parts in Contact with LiquidName Rotor cap Rotor Rotor pin
DF-RCP
●
●
●
-
●
-
●
●
DF-RCS
-
-
-
●
-
●
-
-
DF-RP
●
●
●
-
●
-
-
-
DF-RF
-
-
-
●
-
●
-
-
DF-RS
-
-
-
-
-
-
●
●
DF-PS
●
●
●
●
●
●
●
●
Model
DFS3-1000
DFS3-1002
DFS3-1200
DFS3-1500
DFS3-2000
DFS3-2500
DFS3-5000
DFS3-5002
Material Polyethersulfone SUS316 Polyacetal ETFE Polyacetal Aluminaceramic
Body installation procedures Disassembling procedures
For the wiring procedures, see the Handling instructions for the Digital Flow Meters.
●Take care not to apply bending, tensile or torsional load to the cable. Doing so may break the cable.●If the distance of the cable to the destination is long, secure the cable at intervals of 20 cm to prevent looseness of the cable. If the cable is loose, someone may catch his foot on the cable, thereby breaking it.●When the cable is laid on the ground, it may be stepped on directly or put under equipment and may be broken or short-circuited. Protect it with a metallic conduit or the like.●Do not bundle the cable together with the high-voltage wires of other electric devices or power source cables. Do not lay the cable close to these wires, cables or power sources. Noises from the high-voltage wires, power sources or power source cables will enter the Digital Flow Sensor cable and cause the Digital Flow Sensor and load to malfunction. It is recommended to protect the cable with a shield tube or the like.
●Select a required range from the flow ranges A and B, and screw the supplied plug into the unnecessary range port.
●Before connecting the pipes, flush them. Take care that sealing tape cuttings, dust and rust do not enter the pipes.
Red:+10.8 to 26.4 V Connect to DC power supply.Black:-0 V
White:Frame GND
Yellow:Sensor output(+)
Green:Sensor output(-)
)
7ON
1 2
8 9 101112
1 2 3 4 5 61 2 3
Green
Power supply
Yellow Red Black
200 V ACPower supply
Range switching
100 V AC
0.5 to 5ℓ/min, DIP SW1 ON2.5 to 25ℓ/min ,DIP SW1 OFF
Procedures for wiring with Digital Flow Meter
〈Digital Flow Sensor DFT1000〉 〈Digital Flow Meter DFM2-1000〉
Connection with PLC (programmable controller)●When the PLC has a built-in power supply
Piping
Plug
Plug
O-ring
Yellow(+)Input terminal
Input terminal
Internal power supply
Internal power supply
PLC
PLC
COM
COM
30 V DC MAX
30 V DC MAX
Green(-)
Yellow(+)
Green(-)
+
+
-
-
Note) For details, carefully read the instruction manual for the PLC to be used.
●When the PLC does not have a built-in power supply
Note) For details, carefully read the instruction manual for the PLC to be used.
DFT Series Digital Flow SensorsWiring procedures
Procedures for connecting with a device other than Digital Flow Meters
Piping method
●When wiring the flow sensor, disconnect the power from the equipment on the electric circuit to be connected. Failure to do so may expose the worker to shock hazard or damage the Digital Flow Sensor during wiring work.
Notes on wiring
Tightening Torque Table Unit: N・m
Part to be tightened
Direct piping to plastic body
Fitting of plastic plug
Fitting of piping adapter
Fitting of low-flow piping adapter
Piping to piping adapter
Fitting of plastic body, M5×0.8
Tightening torque range
5 to 10
3 to 4
5 to 10
1.2 to 1.8
Note 1)
Note 1) For the plastic body type switch, it is recommended to use the piping adapters. (Wrap two layers or less of the sealing tape.)
Example)●When the set flow rate is 1 ℓ/min (steady flow rate is 2 ℓ/min) and the primary pressure is 0.2 MPa, select the range A, and fit the plug to the range B port.
Example)●When the set flow rate is 3 ℓ/min (steady flow rate is 6 ℓ/min) and the primary pressure is 0.1 MPa, select the range B, and fit the plug to the range A port.
Notes) When fitting the plug, use the supplied sealing O-ring. The plug is made of plastic. Tighten it to a torque of 3 to 4 N・m.
Handling Instructions Handling Instructions
Digital FlowControl System
Digital Flow Control System
10VM Digital Flow
Control SystemDigital Flow
Control S
ystem11VM
●Use the flow sensor within the specified ambient temperature range keeping the working fluid within the specified temperature range. If it is used at an improper temperature, the rotor magnet may decrease in magnetic force, and the sensor life may be reduced.
●Use the flow sensor within the working flow rate range.
●If there are air bubbles in the flow sensor or the fluid, the rotor speed will be higher than usual. Pipe the flow sensor appropriately to keep the inside of the sensor filled with water by, for example, raising the piping on the downstream side of the sensor.
●Flush the piping in advance to remove dust and foreign particles from the inside.If the working fluid contains rust, metallic particles, dust or other polishing substances, fit a filter on the upstream side of the flow sensor.Iron particles in the fluid will adhere to the rotor magnet, and the sensor may malfunction.
●When a plastic body type flow switch is used in a place where the switch may be exposed to heat cycles or heat shock, use piping adapters. When connecting pipes directly on the plastic body, keep the tightening torque in a range from 5 to 10 N・m.
Note)1. If the steel pipe is excessively long, a moment is applied to the flow sensor body, and the ports may be damaged. In such a case, it is recommended to fit the piping adapter DF-AP (accessory).
Note)1. If the steel pipe is excessively long, a moment is applied to the flow sensor body, and the ports may be damaged. In such a case, it is recommended to fit the piping adapter DF-AP (accessory).
Note) Tighten the mounting screws to a torque of 1.2 to 1.8 N・m.
①When the flow sensor is suspended with steel pipes
PlatePlate
②To screw one side onto steel piping and connect a plastic tube to the other side
③To secure the body on a plate and connect plastic tubes
1)
2)
●Never remove the cover. (If the cover is removed by the user and the sensor is disabled, the repair is not covered by warranty.)
●Insert the supplied rotor cap opener into the rotor cap groove, and turn it counterclockwise.
Then, the rotor cap, rotor and rotor pin can be easily disassembled.●When reassembling, apply a thin layer of grease to the rotor cap O-ring zone. Silicone grease or Teflon grease is recommended.
Cover
Rotor
Rotor cap
Rotor pin
Installing method
Disassembling procedures
Notes on use
Tightening Torque Table Unit: N・m
Part to be tightened
Direct piping to plastic body
Fitting of plastic plug
Fitting of piping adapter
Fitting of low-flow piping adapter
Piping to piping adapter
Fitting of plastic body, M5×0.8
Tightening torque range
5 to 10
3 to 4
5 to 10
1.2 to 1.8
Note 1)
Note 1) For the plastic body type switch, it is recommended to use the piping adapters. (Wrap two layers or less of the sealing tape.)
●Before actually using the flow meter, thoroughly read the instruction manual supplied with the product and the instruction manual for the device (DFS3 or DFT) to be used in combination with the flow meter.
●For the procedures for calibrating the meter indication, see the instruction manual supplied with the product.
●Take care not to apply bending, tensile or torsional load to the cable. Doing so may break the cable. For the minimum bending radius, contact the cable manufacturer.
●If the distance of the cable to the destination is long, secure the cable at intervals of 20 cm to prevent looseness of the cable. If the cable is loose, someone may catch his foot on the cable, thereby breaking it.
●When the cable is laid on the floor, it may be stepped on directly or put under equipment and may be broken or short-circuited. Protect it with a metallic conduit or the like.
●Do not bundle the cable together with the high-voltage wires of other electric devices or power source cables. Do not lay the cable close to these wires, cables or power sources. Noises from the high-voltage wires, power sources or power source cables will enter the cable and cause the Digital Flow Meter to indicate incorrect values.
●It is recommended to protect the cable with a shield tube or the like. (Do not shield the power cable for this product together with its signal cable.)
●Use the flow meter in an indoor environment.●Avoid using it in a place where combustible gas is generated, in an atmosphere with organic solvents (methyl alcohol, thinner, benzene, etc.) or chemicals, such as strong alkaline and strong acid substances, or in a place subject to splashes of water or oil, much dust or severe vibration or impact.
●If it is used in an environment where a large amount of static electricity is generated, install the static electricity source as far from the meter body as possible. Failure to do so may cause operation failure.●Use a rigid panel in consideration of the meter body weight and the cable weight.
●To install the meter, use the supplied fitting. Secure the body putting the panel between the body flange and the fitting. (Tighten the fitting screws to a torque of approx. 0.5 N・m.)
●For the external dimensions of the flow meter installed on the panel and the panel cut size, see the “Outline Drawing.”
●Wire the meter correctly in accordance with the <Connection Diagram>.
●To connect the terminals, it is recommended to use crimp-style terminals. Use crimp-style terminals equivalent to those shown below.
●Before wiring, disconnect the power from the equipment. Failure to do so may expose the worker to electric shock. Also, other electric devices or the Digital Flow Meter may be damaged.
7.5 mm or less
7.5 mm or less
For M3.5
Place of installation
Notes on wiring
DFM2 Series Digital Flow Meters
Handling Instructions Handling Instructions
Digital Flow SwitchDFS3 Digital Flow Control System
DFS312VM
Digital Flow SwitchDigital Flow
Control S
ystem DFS3
DFS3 13VM
SpecificationsFlow rate level
Type
Detection method
Model
Material of body
Working fluid
Port size
Pressure range
Proof test pressure
Ambient temperature
Fluid temperature
Flow rate range
Reading accuracy
Hysteresis
Alarm output response time
Installing direction
Flowing direction
Number of output points
Rated power supply
Low Medium Large
Cable
Plastic body
Magnetic proximity/iron proximity
DFS3−1002/5002
Polyacetal (glass-filled)
Plastic body (Standard type)
Magnetic proximity/iron proximity
DFS3−1000/5000
Polyacetal (glass-filled)
Metallic body
DFS3−1200
BC6 (Nickel-plated)
Magnetic proximity
Stainless steel body
DFS3−1500
SCS14
Metallic body
DFS3−2000
BC6 (Nickel-plated)
Stainless steel body
DFS3−2500
SCS14
Water
Rc3/8 Rc3/4
0 to 1.0 MPa
1.5 MPa
0 to +50℃(No condensing)0 to +70℃(No freezing)
0.2 to 2.5ℓ/min
±20%fs
Flow rate range A: 0.5 to 5ℓ/min, Flow rate range B: 2.5 to 25ℓ/min
±5%fs
12 to 120ℓ/min
5% or less 7% or less
Approx. 500 ms
Free
Both directions
1c contact Relay output×1 point or open collector output×2 points (1 point for each of OUT-HIGH and OUT-LOW)
24 V DC or 100 V AC
Notes)●Use the flow switch within the flow rate range.●The values shown in the table apply to cases of measurement of flow rate of tap water (20℃). The flow rate range varies depending on the viscosity of the fluid to be measured.
Electric Specifications (Common)Supply voltage
Allowable voltage range
Power consumption
24 V DC
700 m W or less
VCTF 8-core,
0.3 mm², 1 m
100 V AC
±10%3 VA or less
Power supply: VCTF 3-core, 0.5 mm², 1 mSignal: VCTF 5-core, 0.5 mm², 1 m
Type
Load current
Photocoupler output
50 V DC
4 mA or less (output residual voltage 0.5 V or less)
Rated control capacity(at resistive load)
Max. allowable power (at resistive load)
Max. allowable voltage
Max. applicable current
Min. applicable load
Insulation resistance between contacts
Withstand voltage between contacts
Electrical life
Output Specifications (Relay output)
Contact structure
Max. allowable voltage
Load current
Output Specifications (Open collector output)
Type
1c×1(Relay is driven when flow rate becomes lower than setting.)
30 V DC 5A/250 V AC 5A
150 W(DC)/1250 VA(AC)
125 V DC/300 V AC
5 A
5 V DC 10mA
1000 MΩ or more on 500-VDC insulation resistance tester
1000 V AC/for 1 min
100,000 times or more (at rated load, switching frequency of 30 times/min)
Photocoupler×2 (OUT-HIGH/OUT-LOW)OUT-HIGH: On when flow rate is more than settingOUT-LOW: ON when flow rate is less than setting
50 V DC
10 mA (output residual voltage 0.8 V or less)
Frequency output
●In addition to the conventional models, stainless body models for high flow rates are added.●Power relay output models with increased contact capacity and open collector output models are added.●Improved noise resistance
Note) The predictive function used in DFS2 is not provided for this DFS3 Series.
Various models of rotor type Digital Flow Switches are newly launched.
Max. allowable voltage
±10%(absolute max. rating 30 V DC)
Model❶
Type❷
Flow rate❸
Supply voltage❹
Output sp
ec❺
Pipin
g adapter❻
Cable
length❼ ❽
Flow r
ate sp
ecified
for
order f
or com
binatio
n
DFS3 - 10 0 -0 24 V DC T A L - 25
Symbol101215202550
Flow rateMediumMediumMediumLargeLargeMedium
Material of bodyPlasticMetal
Stainless steelMetal
Stainless steelPlastic
DetectionMagnetMagnetMagnetMagnetMagnetIron
525120
5 ℓ(0.5 to 5 ℓ)25 ℓ(2.5 to 25 ℓ)120 ℓ(12 to 120 ℓ)
Note) Enter only when placing an order for a combination of flow switch and DFM2.
L1 m (standard)3 m (semi-standard)
APiping adapters unnecessaryWith piping adapters
TRelay outputOpen collector output
2Medium or high flow rateLow flow rate (with low-flow piping adapter)
0
Note) low flow rate” can be specified only for the plastic bodies.
Note) Only plastic bodies are provided with piping adapters.
24 V DC100 V AC
2
Configuration Table
● How to order
Model
DFS3−1000
DFS3−5000
DFS3−1002
DFS3−5002
DFS3−1200
DFS3−1500
DFS3−2000
DFS3−2500
Type
Plastic body (medium flow rate)
Plastic body (low flow rate)
Metallic body (medium flow rate)
Stainless steel body (medium flow rate)
Metallic body (high flow rate)
Stainless steel body (high flow rate)
Magnetic proximity type
Iron proximity type
Magnetic proximity type
Magnetic proximity type
Magnetic proximity type
Magnetic proximity type
Magnetic proximity type
Magnetic proximity type
Power supply
100 V AC
◯ ◯ ◯
△ △ △ △
△
△
△
△
△
△
△
△
△
24 V DC
Cable length
1 m 3 m
◯
◯
◯
◯
◯
◯
◯
◯
◯: Standard product △: Semi-standard product
How to order a combination of flow switch and Digital Flow Meter DFM2
DFM2-1000- 25
525120
5 ℓ(0.5 to 5 ℓ)25 ℓ(2.5 to 25 ℓ)120 ℓ(12 to 120 ℓ)
Note) Enter only when placing an order for a combination of flow switch and DFM2.
流 量
SERIAL NO.
ℓ/min
流 量
SERIAL
NO.
流 量SERIAL NO.
Calibration nameplate
Accessories(parts for plastic body type DFS3-1000 and 5000)
Semi-standard productThe item enclosed by broken line needs not to be entered, if unnecessary.
●Piping adapter set(For prevention of breakage of ports of DFS3-1000 and 5000)Part number: DF-APContents: Piping adapter (material: copper alloy/C3604B): 2 pcsSealing O-ring (P-10A): 2 pcs
●Low flow piping adapter set(Set for converting medium-flow type DFS3-1000 or 5000 to low-flow type)Part number: DF-FW2Contents: Piping adapter (material: copper alloy): 1 pc
Low flow piping adapter (material: copper alloy/C3504B): 1 pcLow flow nozzle (material: copper alloy/BC6): 1 pcSealing O-ring (P-10A): 2 pcsO-ring for nozzle (1AS-6): 1 pc
Note) For DFS3-1200 and 1500, contact us.
Digital Flow SwitchDFS3 Digital Flow Control System
DFS314VM
Digital Flow SwitchDigital Flow
Control S
ystem DFS3
DFS3 15VM
0.5 2.5 5 10 12 15 20 250
10
20
30
40
50
60
70
80
90
DFS3-1000, 1200, 1500, 5000(medium flow rate type)
10 20 30 40 50 60 70 80 90 1001101201301400
10
20
30
40
50
60
70
80
90
DFS3-2000, 2500(large flow rate type)
0.2 1.0 2.0 2.50
10
20
30
40
50
60
70
80
90
Trimmer setting scale (%)
Trimmer setting scale (%)
Trimmer setting scale (%)
Flow rate (ℓ/min) Set flow rate range (specification)0.2 to 2.5 ℓ/min
Flow rate (ℓ/min) Set flow rate range (specification)12 to 120 ℓ/min
DFS3-1002, 5002(low flow rate type)
Range ARange A
Range BRange B
A
Flow setting procedures
■When setting with a flow meter①Reduce the flow rate in the piping to the set flow rate.②Then, turn the flow rate setting trimmer on the front panel of the flow switch with a slotted screwdriver to switch the LED from green to red.■When setting without a flow meterUse the following graphs when determining an approximate flow rate without using a flow meter.Example: To output an alarm using DFS3-1000 when the flow rate is about 10 ℓ/min or less
The intersection of the line of the set flow rate of 10 ℓ/min and the line of flow rate range B is A. Read the percentage specified for the point A, 35%.Set the flow switch trimmer to 35%, and an alarm will be output when the flow rate is approx. 10 ℓ/min or less.
Trimmer Setting Scale-Flow Characteristic Graphs (fluid: tap water at 20℃)
Flow rate (ℓ/min) Set flow rate range (specification)Flow rate range A: 0.5 to 5 ℓ/minFlow rate range B: 2.5 to 25 ℓ/min
0.5 5 15 250
0.1
0.3
Flow rate(ℓ/min)
DFS3-1000・1200・1500・5000(medium flow rate type)
2.5 10 20
0.2
Primary pressure:0.3 MPa
10 40 90 1400
0.1
0.3
Flow rate(ℓ/min)
DFS3-2000・2500(large flow rate type)
20 70 120
0.2
Primary pressure:0.15 MPa
30 60 11050 80 130100
0.5 2.00
0.05
0.20
Secondary pressure(MPa)
Secondary pressure(MPa)
Secondary pressure(MPa)
Flow rate(ℓ/min)
DFS3-1002・5002(low flow rate type)
1.0
0.15
Primary pressure:0.2 MPa
1.5 2.5
0.10
A
Range ARange A
Range BRange B
Flow Rate-Pressure Loss Characteristic Curves (fluid: tap water at 20℃)
The flow rate-pressure loss characteristic curves shown left are used to determine the pressure loss of DFS3 Series Digital Flow Switches.Example : Determine the pressure loss
caused when water is fed at 20 ℓ/min using the flow rate range B of DFS3-1000, 1200, 1500 or 5000.
Answer : The intersection of the line of the flow rate of 20 ℓ/min and the flow curve is A.
Read the value of the secondary pressure at the point A.Where,(Pressure loss)=(primary pressure)-(secondary pressure)Therefore, =0.3 MPa-0.25 MPa =0.05 MPaAccordingly, to feed water at a flow rate of 20 ℓ/min, the pressure difference between the upstream and downstream sides of the flow switch is 0.05 MPa.This indicates that the primary pressure (pump discharge pressure) must be 0.05 MPa or more. However, actually, determine the pump discharge pressure based on the pressure loss on the whole piping.Note) The characteristics vary
depending on the viscosity and temperature of the fluid used.
How to read the graph
Digital Flow SwitchDFS3 Digital Flow Control System
DFS316VM
Digital Flow SwitchDigital Flow
Control S
ystem DFS3
DFS3 17VM
Power cable
Signal cable
19 20
12 13 14 15 16 17 1815 16 17 1812 13 14
Flow rate setting trimmer
2-LED typeIn normal state: GreenIn alarm state: Red ❷ ❸ ❻ ❺ ❹ ❶ ❽ ❾10 ❼11
❷
Power cable
Signal cable
19 20
12 13 14 15 16 17 1812 13 14 15 16 17 18
Flow rate setting trimmer
2-LED typeIn normal state: GreenIn alarm state: Red ❷ ❸ ❻ ❺ ❹ ❶ ❽ ❾10 ❼11 ❷
DFS3-1000・1200・1500・5000
DFS3-2000・2500
DFS3-1500
DFS3-2500
24 V DC 100 V AC
24 V DC 100 V AC
List of Parts in Contact with Liquid
No Name
❶❷❸❹❺❻❼
Body
Rotor cap
Rotor cap gasket
Rotor
Rotor pin
Rotor cap bearing
Rotor bearing
Name
DFS3−1000・5000
Polyacetal (glass-filled)
DFS3−1200
Bronze casting (nickel-plated)
Polyether sulfone
Nitrile rubber
Polyacetal
DFS3−1500
Stainless steel:SCS14
Stainless steel:SUS316
ETFE
ETFE
Alumina ceramic
Alumina ceramic
Alumina ceramic
DFS3−2000
Bronze casting (nickel-plated)
Polyether sulfone
Nitrile rubber
Polyacetal
DFS3−2500
Stainless steel:SCS14
Stainless steel:SUS316
ETFE
ETFE
Weight Table
Model Type
Power supply
Unit: g
24 V DC
Cable, standard(1 m)
DFS3−1000
DFS3−1200
DFS3−1500
DFS3−2000
DFS3−2500
DFS3−5000
DFS3−1002
DFS3−5002
Magnetic proximity type
Magnetic proximity type
Magnetic proximity type
Magnetic proximity type
Magnetic proximity type
Iron proximity type
Magnetic proximity type
Iron proximity type
Approx. 410
Approx. 1100
Approx. 1100
Approx. 1400
Approx. 1300
Approx. 410
Approx. 540
Approx. 540
Cable length(3 m)
Approx. 550
Approx. 1250
Approx. 1250
Approx. 1550
Approx. 1450
Approx. 550
Approx. 700
Approx. 700
100 V AC
Weight to be added when
piping adapters are fittedCable, standard(1 m)
Approx. 500
Approx. 1200
Approx. 1200
Approx. 1500
Approx. 1400
Approx. 500
Approx. 650
Approx. 650
Cable length(3 m)
Approx. 800
Approx. 1500
Approx. 1500
Approx. 1800
Approx. 1700
Approx. 800
Approx. 950
Approx. 950
+Approx. 120
ー
ー
ー
ー
+Approx. 120
ー
ー
Parts ListNo Name Material
❽Hall IC (magnetic proximity type)
High-frequency oscillating switch (iron proximity type)
Magnet (magnetic proximity type)
Iron (iron proximity type)
Cover gasket
Cover
Trimmer cap
Trimmer cap gasket
-
-
-
-
Nitrile rubber
Cold rolled steel
Synthetic resin
Nitrile rubber
10111213
❾
No Name Material
14151617181920
Trimmer
Screw gasket
Screw
Cable gland
Cabtyre cable
Cable gland
Cabtyre cable
-
-
-
-
VCTF 1 m
-
VCTF 1 m
Plastic body (medium flow rate)
Metallic body (medium flow rate)
Stainless steel body (medium flow rate)
Metallic body (high flow rate)
Stainless steel body (high flow rate)
Plastic body (medium flow rate)
Plastic body (low flow rate)
Plastic body (low flow rate)
Digital Flow SwitchDFS3 Digital Flow Control System
DFS318VM
Digital Flow SwitchDigital Flow
Control S
ystem DFS3
DFS3 19VM
Unit: mm Unit: mm
58
25.52
8565
2-M5×0.8 depth 6(Mounting screws)
2-LED type In normal state (green) In alarm state (red)
Flow rate setting trimmer (270°)
φ459
13
12.5
76 2110 25 41 3
6.5
31.5
24.5
Flow rate range A 2-Rc3/8
Flow rate range B 2-Rc3/8
Cable(VCTF 8-core, 0.3 mm², 1 m long)
2-M5×0.8 depth 6(Mounting screws)
6585123
2
9
25.5
58
Piping adapter 2-M5×0.8 depth 6(Mounting screws)
6585123
2
9
25.5
58
Low-flow piping adapterLow-flow nozzlePiping adapter
V groove for discrimination
To feed water in arrow direction
6.5
3.531.5
24.5
22Cable(VCTF 5-core, 0.5 mm², 1 m long)
Cable(VCTF 3-core, 0.5 mm², 1 m long)
19R3/8 Rc3/8
HEX24
19R3/8 Rc3/8
V groove for discrimination
HEX24
DFS3-1000・1200・1500・5000-24 V DC*
Dimensions when piping adapter set (DF-AP) is attachedDFS3-1000・5000-24 V DC*A*
Dimensions when low flow piping adapter set (DF-FW2) is attachedDFS3-1002・5002-24 V DC
DFS3-1000・1200・1500・5000-100 V ACDFS3-1500-24 V DC
Low flow piping adapter (accessory)Piping adapter(accessory)
Note) The appearance is different, but the outer dimensions are the same as shown above.
Note) The appearance is different, but the outer dimensions are the same as shown above.
Note) For the low flow type, use the flow rate range A.
67.5
35
8565
2-M6×1 depth 8(Mounting screws)
2-LED typeIn normal state (green)In alarm state (red)
Flow rate setting trimmer (270°)
φ4517
83 216 36 41 3
6.531.5
24.5
2-Rc3/4 Cable(VCTF 8-core, 0.3 mm², 1 m long)
6.5
3.531.5
24.5
Cable(VCTF 5-core, 0.5 mm², 1 m long)
Cable(VCTF 3-core, 0.5 mm², 1 m long)
22
DFS3-2000・2500-24 V DC*
DFS3-2500-24 V DC* DFS3-2000・2500-100 V AC*
Note) The appearance is different, but the outer dimensions are the same as shown above.
Digital Flow SensorDFT Digital Flow Control System
DFT20VM
Digital Flow SensorDigital Flow
Control S
ystem DFT
DFT 21VM
Specifications
Note) These ranges apply to tap water of 20℃. The working temperature range varies depending on the viscosity and temperature of the fluid used.
Model
Item
Working fluid
Working pressure range
Proof test pressure
Note) Working flow rate range
Reading accuracy
Ambient temperature
Fluid temperature
Installing direction
Flowing direction
Weight
Water
0 to 1.0 MPa
1.5 MPa
Flow rate range A: 0.5 to 5 ℓ/min
Flow rate range B: 2.5 to 25 ℓ/min
±5%FS(0 to +70℃)
0 to +50℃(No condensing)
0 to +70℃(No freezing)
Free
Both directions
Approx. 280 g
DFT−1000
Electrical Specifications
Accessories●Piping adapter set(Prevention of cracking of plastic body ports)Part number: DF-APContents: Piping adapter (material: copper alloy/C3604B): 2 pcsSealing O-ring (P-10A): 2 pcs
Supply voltage
Consumption current
Type
VoltageOutput
Current
Cable
10.8 to 26.4 V DC
15 mA
Photocoupler output
0 V to 30 V
4 mA or less
VCTF 5-core, 0.5 mm², 1 m long
Flow Characteristic Curves (fluid: tap water)
0.3
0.2
0.1
0 0.5 2.5 5 10 15 20 25
Secondary pressure MPa
Flow rate range A
Flow rate range BA
Primary pressure: 0.3 MPa How to read the graphUse the flow characteristic curves to determine the pressure loss of DFT Series Digital Flow Sensors.Example : Determine the pressure loss caused when water
is fed at 20 ℓ/min using the flow rate range B.Answer : The intersection of the line of flow rate of
20 ℓ/min and the flow curve is A. Read the secondary pressure value at the point A.
Where, (pressure loss)=(primary pressure)-(secondary pressure)Therefore,=0.3 MPa-0.25 MPa=0.05 MPaAccordingly, when water is fed at 20 ℓ/min, the pressure difference between the upstream and downstream sides of the flow sensor is 0.05 MPa. This indicates that the primary pressure (pump discharge pressure) must be 0.05 MPa or more. However, actually, determine the pump discharge pressure based on the pressure loss on the whole piping.
Flow rate (ℓ/min)
●When combined with a Digital Flow Meter, the sensor enables to directly read the instantaneous flow rate as a digital value and facilitates measurement from a distance.●The flowing state can be visually checked.●The working flow rate range can be switched to two ranges, 0.5 to 5 ℓ/min and 2.5 to 25 ℓ/min.●The sensors can be disassembled without disconnection of pipes.
Flow sensors for converting instantaneous flow rate of liquid to electric pulse signal
❶❷❸ ❹❺❻❼ ❽ ❾ 10 11
12 13
DFT-1000
NameNo. Material Qty.
Parts List
Drawing of Principle
Rotor pin
Rotor cap gasket
Rotor cap
Body
Rotor
Hall IC
Magnet
Alumina ceramic
Nitrile rubber
Polyether sulfone (bearing: alumina ceramic)
Polyacetal+glass
Polyacetal (bearing: alumina ceramic)
-
-
1
1
1
1
1
1
3
❶
❷
❸
❹
❺
❻
❼
NameNo. Material Qty.
Cover gasket
Cover
Cable gland
Cable
Screw gasket
Screw
Nitrile rubber
Cold rolled steel
-
-
-
-
1
1
1
1 m
4
4
❽
❾
10
11
12
13
Magnet
+10.8 to 26.4 V0 V
GND
Output
+
Rotor
Hall IC
Regulator
Photocoupler
Explanation of OperationThe rotor rotates at a speed in proportion to the liquid flow rate. A permanent magnet is molded in the rotor. The hall IC on the body side detects the magnetism and converts the rotor rotation to an electric pulse signal.Unlike electromotive sensors using coils, the digital type hall IC constantly gives rectangular waves with a uniform crest value irrespective of the rotor speed. This pulse is insulated by the photocoupler and output to the outside.
Digital Flow SensorDFT Digital Flow Control System
DFT22VM
Unit: mm
225.5
58
65
85
6.524.5
31.5
φ45 913
12.5
3212510
2156
CableVCTF 5-core, 0.5 mm², 1 m long( )
2-M5×0.8 depth 6 (Mounting screws)
Flow rate range A 2ーRC3/8
Flow rate range B 2ーRC3/8
DFT-1000
Note) For the dimensions of the sensor provided with the piping adapters, see the dimensional drawing of DFS3 Series.
0
100
200
0.5 2.5 5 10 20 25 30
Flow rate (ℓ/min)Working flow rate range (specification)Flow rate range A: 0.5 to 5ℓ/minFlow rate range B: 2.5 to 25ℓ/min
Frequency(Hz)
Frequency-Flow Characteristic Graph (fluid: tap water at 20℃)
Flow rate range B
Flow rate range A
Digital Flow MeterDFM2 Digital Flow Control System
DFM224VM
Digital Flow MeterDigital Flow
Control S
ystem DFM2
DFM2 25VM
Specifications
Note) For the procedures for changing each setting, see the instruction manual supplied with the product.
Model
Item
Display
Display range
Counting method
Decimal pointDisplayed value calibrating method
Displayed flow rate range (ℓ/min)
Setting of auto-zero time
Pulse input (INI)
Set inhibit input (KPT)
Setting memory
Supply voltage
External power supply
Power consumption
Working ambient temperature
Working ambient humidity
Storage ambient temperature
Weight
Accessories
Applicable devices
Red segment LED, 10×5.5 (height×width), mm
0 to 99999, display of up to 5 digits
Period measurement operation method
Display of 0 to 4 digits after decimal point, arbitrarily settable
Scaling change with front panel key
0.2 to 2, 0.5 to 5, 2.5 to 25, 12 to 120
Settable in range from 1 to 9 sec in 1-sec units
Storing method: Storage by nonvolatile element (NV-RAM)
Storage period: Approx. 10 years
100 V/200 V AC, 90 to 120 % 50/60 Hz
24 V DC±10% 80 mA
Approx. 8.5 AV
-10 to +50℃(No freezing)
35 to 85%RH(No condensing)
-25 to +85℃(No freezing)
Approx. 450 g (incl. accessories)
Panel mounting bracket/screw
All models of Digital Flow Switches, Digital Flow Sensors
DFM2−1000
●The flow rate can be easily read on the LED display with a character height of 10 mm.●A compact front panel in DIN standard size of 72×72 is used.(The mounting dimensions are the same as those of DFMSeries.)
●The flow rate range can be changed by operating the switch.
The flow meter receives an output pulse from a Digital Flow Switch or a Digital Flow Sensor and digitally displays the instan-taneous flow rate of liquid.
Input resistance : 10 kΩ (pull up to 24 V DC), negative logic operation
Input current : 2 mA or less
Operating voltage : ON voltage=2 V or less
OFF voltage=5 V or more
Pulse width : 50 µs or more for H and L
Input resistance : 10 kΩ (pull up to 24 V DC), negative logic operation
Input current : 2 mA or less
Operating voltage : ON voltage=2 V or less (Settings cannot be changed.)
OFF voltage=5 V or more (Settings can be changed.)
How to order a set of devices (to be calibrated before shipment)
●100-VAC models can be calibrated.Note) Devices having the same serial numbers are
combined and calibrated.The calibration nameplates are applied to the positions shown right. Combine the devices having the same serial number.
In the following cases, the user must calibrate the set of devices.1.When a fluid other than water is used2.When the measurement range is changed after purchasing3.When only a Digital Flow Meter is purchased
ModelFlow rate range 0.5 to 5 /min
DFM2−1000−5Digital Flow Meters
Digital Flow Switches
Digital Flow Sensors DFT−1000−5
DFS3−1000−24 V DC−5
DFS3−1200−24 V DC−5
DFS3−1500−24 V DC−5
DFS3−5000−24 V DC−5
2.5 to 25 /min
DFM2−1000−25
DFT−1000−25
DFS3−1000−24 V DC−25
DFS3−1200−24 V DC−25
DFS3−1500−24 V DC−25
DFS3−5000−24 VDC−25
12 to 120 /min
DFM2−1000−120
-
DFS3−2000−24 V DC−120DFS3−2500−24 V DC−120
ℓ/min流 量
SERIAL NO.
Calibration nameplate
Calibration nameplate
●Digital Flow Meter ●Digital Flow Switch●Digital Flow Sensor
Calibration nameplate
Digital Flow MeterDFM2 Digital Flow Control System
DFM226VM
Digital Flow MeterDigital Flow
Control S
ystem DFM2
DFM2 27VM
Unit: mm
DFM2-1000
SETM
( /min)
DFM2-1000
( /min)
1 2 3
7 8 9 10 11 12
4 5 6
ON
1 2
68+0.7 0
68+0.7 0
Panel cut sizeWhen the dust cover is opened
When the dust cover is closed
72
72
68
1038.528 111.5
68
105.5Panel thickness: 1 to 5 3Fitting
Fitting screw
Digital Flow Switch (24 V DC)Digital Flow Sensors
Photocoupler Input circuit
Power supply for sensor 24 V DC 80 mA
Arithmetic circuit Digitaldisplay unit
Pre-scaler settingkey switch
Range settingDIP switch
+24V
10kΩ
100 V AC200 V AC
Inhibition of pre-scaler setting
Outline Circuit Diagram
Dimensional Drawings
■Explanation of operationWhen the output frequency of the Digital Flow Switch or Digital Flow Sensor is input into the DFM2, the frequency is calculated according to the frequency division ratio and the decimal point position set with the pre-scaler setting key switch (on the front panel), and the instantaneous flow rate is displayed on the digital display unit.
7ON
1 2
8 9 101112
1 2 3 4 5 61 2 3
White
Power supply200 V AC
Blue Red Black
Power supply100 V AC
Range switching0.5 to 5ℓ/min, DIP SW1 ON2.5 to 25ℓ/min, DIP SW1 OFF12 to 120ℓ/min, DIP SW1 OFF
Red : +24 V Connect to DC power supply.Black : -0 V
White : Frequency output(-)
Blue : Frequency output(+)
Yellow : Relay common
Yellow Relay commonGray : Earth………Connection of earth line
Gray Earth………Connection of earth line
Select one of the contacts, and connect the selected contact together with the yellow line to the equipment control panel (alarm).
Green : Relay a contact
Brown : Relay b contact
Green Relay a contactBrown Relay b contact
Combination to give interlock signal when flow rate is insufficientDigital Flow Switch+Digital Flow MeterDFS3-1000・1200・1500・5000・2000・2500-24 V DC+DFM2-1000
Combination only for reading flow rateDigital Flow Sensor+Digital Flow MeterDFT-1000+DFM2-1000
●When the relay contact a is used, the contact is closed while the flow rate is lower than the set flow rate.
●When the relay contact a is used, the contact is closed while the flow rate is lower than the set flow rate.
DFS3-1000・1200・1500・5000・2000・2500-100 V AC+DFM2-1000
White : 100 V AC
Black :
White : Frequency output(-)
Red : Frequency output(+)
Yellow : Relay common
Green : Earth………Connection of earth line
7ON
1 2
8 9
1 2 3 4 5 61 2 3
White
Power supply200 V AC
Power supply100 V AC
Red
Power supply100 V AC
Yellow Relay common
Green Earth………Connection of earth line
Black Relay b contact
White
Red : +10.8 to 26.4 V Connect to DC power supply of Digital Flow Meter.Black : -0 V
White : Frame GND…Connection of earth line
Yellow : Sensor output(+)
Green : Sensor output(-)
7ON
1 2
8 9
1 2 3 4 5 61 2 3
Green
Power supply200 V AC
Yellow Red Black
Power supply100 V AC
〈Connection Diagram〉
Select one of the contacts, and connect the selected contact together with the yellow line to the equipment control panel (alarm).
Range switching0.5 to 5ℓ/min, DIP SW1 ON2.5 to 25ℓ/min, DIP SW1 OFF12 to 120ℓ/min, DIP SW1 OFF
Green Relay a contact Select one of the contacts, and connect the selected contact together with the yellow line to the equipment control panel (alarm).
Range switching0.5 to 5ℓ/min, DIP SW1 ON2.5 to 25ℓ/min, DIP SW1 OFF
101112
101112
BlackSelect one of the contacts, and connect the selected contact together with the yellow line to the equipment control panel (alarm).
Green : Relay a contact
Black : Relay b contact
Leak DetectorsLD1 Digital Flow Control System
LD128VM
Leak DetectorsDigital Flow
Control S
ystem LD1
LD1 29VM
Type
Detecting method
Model
Material of body
Working fluid
Port size
Pressure range
Proof test pressure
Ambient temperature
Fluid temperature
Flow rate range
Reading accuracy
Hysteresis
Alarm output response time
Installing direction
Flowing direction
Number of output points
Rated power supply
Leak detecting current
Weight
Water
Rc3/8 (with piping adapter)
0 to 1.0 MPa
1.5 MPa
0 to +50℃(No condensing)
0 to +70℃(No freezing)
2.5 to 25 ℓ/min
±5%fs
5% or less
Approx. 500 ms
Free
Both directions (Upper: primary side Lower: secondary side)
1c contact, relay output×1 point (common to insufficient flow rate and leak)
24 V DC
Leak of approx. 3% or more can be detected by setting the min. leak detection level (at 25 ℓ/min).
Approx. 1300 g
Magnetic proximity type
LD1-1000-24 V DC
Iron proximity type
LD1-5000-24 V DC
Notes) ●Use the flow switch within the flow rate range.●The values shown in the table apply to cases of measurement of flow rate of tap water (20℃). The flow rate range varies depending on the viscosity of the fluid to be measured.
Plastic body
Polyacetal (glass-filled)
Specifications
●Sensing of difference in flow rate between IN and OUT sides.●Leak of approx. 3% can be detected by setting the min. leak detection level (at a flow rate of 25 ℓ/min).●Highly reliable switches resistant to noises from spot welding machines, etc.●The detecting method can be selected from magnetic proximity and iron proximity types depending on the intended use.
Leak detectors evolved from DFS3 Series Digital Flow Switches
Electrical Specifications Output SpecificationsSupply voltage
Allowable voltage range
Power consumption
Cable
24 V DC
±10% (absolute max. rating 30 V DC)
2 W or less
VCTF 8-core, 0.3 mm², 1 m long
Max. allowable voltage
Max. applicable current
Min. applicable load
Insulation resistance between contacts
Withstand voltage between contacts
Electrical life
Contact structure1c×1
(common to flow rate and leak, relay is driven when setting is exceeded)
Max. allowable power (at resistive load)
Rated control capacity (at resistive load)
110 V DC/125 V AC
1 A
10 µA 10 mV DC
1000 MΩ or more on 500-VDC insulation resistance tester
750 V AC for 1 min
100,000 times or more (rated load, switching frequency of 20 times/min)
● How to order
●The cable is 1 m long.●The detector will be delivered with the piping adapters connected.
LD1 - 10 00-24 V DC- RMo
del❶
Type❷
Supply voltage❸
Wirin
g direction❹
Symbol1050
Detection methodMagnetic proximity typeIron proximity type
None:R
Left (standard)Right (semi-standard)
*Direction as viewed from the front
Type
Max. allowable voltage
Load current
Frequency
output
Photocoupler output
50 V DC
4 mA or less (output residual voltage 0.5 V or less)
30 V DC 1 A/125 V AC 0.5 A
30 W(DC)/62.5 VA(AC)
Leak DetectorsLD1 Digital Flow Control System
LD130VM
Leak DetectorsDigital Flow
Control S
ystem LD1
LD1 31VM
Unit: mm
The flow rate difference between IN and OUT of the cooling unit is monitored through LD1 to detect leak between IN and OUT of LD1. It gives an alarm also when the flow rate is insufficient.
While the flow rate through the upper part of LD1 is used as the master flow rate, the flow rate through the lower part of LD1 is used for regular flow rate monitoring. Accordingly, the flow rate can be monitored irrespective of flow rate drop and piping resistance due to contamination in the cooling unit and piping to be checked for leak. When the inside of the piping is cleaned, the upper part of LD1 can be used as a reserved line.
LD1 monitors the difference between the inlet flow rate and outlet flow rate of a cooling unit and outputs an alarm when a difference between the flow rates is detected. Therefore, it is not affected by flow rate fluctuation on the primary side and is able to stop only the line where leak has occurred. It outputs an alarm also when the primary flow rate is dropped by water pump trouble.
By the conventional method of detecting leak in a cooling unit, the flow switch on a normal line often output an alarm due to flow rate fluctuation on the primary side caused by leak from one point. To avoid this, it was required to reduce the alarm flow rate setting to an excessively lower value.
Explanation of operation and application examples
MIN
10
MAX
FLOW/INDICATOR
FLOW
3040 50 60
70
80
90
20
%
67 8 10
LEAK/INDICATOR
1520305075100
5
LEAK
SUPPLY0
RETURNMIN
10
MAX
FLOW/INDICATOR
FLOW
3040 50 60
70
80
90
20
%
67 8 10
LEAK/INDICATOR
1520305075100
5
LEAK
SUPPLY0
RETURNCooling unit
IN
OUT
MIN
10
MAX
FLOW/INDICATOR
FLOW
3040 50 60
70
80
90
20
%
67 8 10
LEAK/INDICATOR
1520305075100
5
LEAK
SUPPLY0
RETURN
IN
OUT
!!Leak alarm!!
MIN
10
MAX
FLOW/INDICATOR
FLOW
3040 50 60
70
80
90
20
%
67 8 10
LEAK/INDICATOR
1520305075100
5
LEAK
SUPPLY0
RETURN
IN
OUT
!!Low rate drop alarm!!
Cooling unit
Cooling unit
Primary
side
Cooling unit
Cooling unit
MIN
10
MAX
FLOW/INDICATOR
FLOW
3040 50 60
70
80
90
20
%
67 8 10
LEAK/INDICATOR
1520305075100
5
LEAK
SUPPLY0
RETURN
MIN
10
MAX
FLOW/INDICATOR
FLOW
3040 50 60
70
80
90
20
%
67 8 10
LEAK/INDICATOR
1520305075100
5
LEAK
SUPPLY0
RETURN
MIN
10
MAX
3040 50 60
70
80
90
20 DFS3
MIN
10
MAX
3040 50 60
70
80
90
20 DFS3
When water is fed to LD1, the rotors rotate in proportion to the flow rate. The rotor speeds are detected by the upper and lower sensors.Theoretically, the rotor speeds detected by the upper and lower sensors are the same. If the speeds differ due to instrumental error, the speeds are corrected by the internal circuit, and the flow rate difference is monitored.
Cooling unit Cooling unit
Cooling unit
Cooling unit
→
Secondary side←
Primary
side→
Secondary side←
Dimensional Drawings
Wiring Procedures
143
4-φ765
Cable(VCTF 8-core, 0.3 mm², 1 m long)
Piping adapterRc3/8HEX24
Mounting holesMounting pitchRear view
1.2
75
38
67
45φ
9098.8
Surface
54 28.2 8.868 22.5
85
80
34.5
160
(123)Flow alarm setting trimmer
In normal state (green)In alarm state (red)
FLOW ALARM LED
In normal state (green)In alarm state (red)
LEAK ALARM LED
Leak alarm setting trimmer91
Secondary side
Primary side
MIN
10
MAX
FLOW/INDICATOR
FLOW
3040 50 60
70
80
90
20
%
67 8 10
LEAK/INDICATOR
1520305075100
5
LEAK
SUPPLY0
RETURN
LD1Red : +24 V DC
Black : 0 V
Gray : NC
Brown : Relay NC contact
Green : Relay NC contact
Yellow : Relay common
blue : Frequency output(+)
White : Frequency output(-)
Alarm output
Flow rate signalConnect to Digital Flow Meter DFM2.
ALARM
FREQ
*For the handling procedures, see the instruction manual.
Flow Sensor EFS2EFS2 Digital Flow Control System
EFS232VM
Flow Sensor EFS2Digital Flow
Control S
ystem EFS
2EFS2 33
VM
Unit: mm
Product conforming to RoHS
Main Body Specifications
Magnetic proximity
EFS2−M*−*
Iron proximity
EFS2−F*−*
Magnetic proximity
EFS2−F*
Iron proximity
EFS2−F*
Polyacetal
Water
Rc3/8
0 to 1.0 MPa
1.5 MPa
0 to +50℃(No condensing)
0 to +60℃(No freezing)
Output Specifications
Frequency output
Alarm output
Alarm contact
Photocoupler
30 V DC Load current: 4 mA or less
Photocoupler
Max. allowable voltage: 30 V DC
Load current: 10 mA
Adjustable type
Higher than set flow rate: Signal ON
Lower than set flow rate: Signal OFF
EFS2-*PS (frequency, switch output)
Analog output4 to 20 mA DC
Load impedance 10 Ω to 300 Ω
EFS2-*A (current output)
Model Number
EFS2 M PS- -
Note) When the current output is selected, a trimmer is not provided.
PS Frequency, switch output A Current output (DC: 4 to 20 mA)
M Magnetic proximity type F Iron proximity type
NoneRLLR
Standard typeLow flow rate type (from right to left)Low flow rate type (from left to right)
Flow rate level
Detection method
Model
Material of body
Working fluid
Port size
Working pressure range
Proof test pressure
Ambient temperature
Fluid temperature
Flow rate range
Reading accuracy
Repeatability
Alarm output response time
Installing direction
Flowing direction
Weight
Electrical SpecificationsCommon electrical specifications
24 V DC ±10%
1.5 W or less
Power supply
Power consumption
Model❶
Detect
ion me
thod❷
Output sp
ec❸
Flow type❹
○Wiring Procedures
○EFS2-*PS
○EFS2-*A
Red : 24 V DC
Black : 0 V
Green : Frequency output(+)
White : Frequency output(-)
Brown : Switch(+)
Yellow : Switch(-)
freq.
switch
Red : 24 V DC
Black : 0 V
Green : Analog output(+)
White : Analog output(-)Output ON resistance10 to 300 Ω
RL
±5%FS
±2%
700 ms or less
Free
0.5 to 3ℓ/min 2.5 to 25ℓ/min
One direction
Approx. 270 g
Both directions
Approx. 250 g
Low flow rate type Standard type
●Compact type flow sensors●Two detecting methods, magnetic proximity type and iron proximity type, are available.●The sensors can be maintained easily without disconnection of pipes.●They can be installed in any posture. Straight run of pipe is not required.●The skeleton body enhances the visibility of the LED.●Applicable to low flow rates (semi-standard)
Small-size high-performance skeleton body flow sensors
Dimensional Drawings
54
321
987
6
82.5(Low flow rate type)
79(Standard type)(19)
55
25.5
φ45
2510.5
Cable0.3 m long
22.5
67
3152
63
12.5
2-M4 depth 5
2-Rc3/8Piping ports
Flow rate adjusting trimmer
Yellow : Switch(-)Brown : Switch(+)White : Frequency output(-)
Black : 0 VGreen : Frequency output(+)
Red : 24 V DC Red : 24 V DC
Black : 0 V
Green : Analog output(+)
White : Analog output(-)Output ON resistance10 to 300 Ω
CableEFS2-*PS(frequency, switch output) EFS2-*A(analog output)
CIC 6-core 0.18 mm2 0.3 m VCTF 4-core 0.3 mm2 0.3 m
48 54.5
5
35
(φ17)
Performance Curves
Relationship between flow rate and frequency Relationship between flow rate and current
Flow rate (ℓ/min)
(standard)(low flow rate)
1501401301201101009080706050403020100
20
15
10
5
0
Frequency (Hz)
Current (mA)
00
50.5
101.0
151.5
202.0
252.5
303.0
Flow rate (ℓ/min)
(standard)(low flow rate)
00
50.5
101.0
151.5
202.0
252.5
303.0
Magnetic proximityMagnetic proximity(standard)(standard)
Magnetic proximity(standard)Iron proximityIron proximity
(standard)(standard)Iron proximity(standard)
Iron proximityIron proximity(low flow rate)(low flow rate)Iron proximity(low flow rate)
標準標準standardstandardstandard
low flow ratelow flow ratelow flow rate
EFS2-*PS(frequency, switch output) EFS2-*A(current output)
Magnetic proximityMagnetic proximity(low flow rate)(low flow rate)Magnetic proximity(low flow rate)
Flow Sensor EFS2EFS2 Digital Flow Control System
EFS234VM
Flow Sensor EFS2Digital Flow
Control S
ystem EFS
2EFS2 35
VM
Setting procedures and fluid
Relationship between Trimmer and Flow Rate
Trimmer setting
30
25
20
15
10
5
0
3.0
2.5
2.0
1.5
1.0
0.5
0
Standard
0 1 2 3 4 5 6 7 8 9
Low
Standard
Low
0 0.50
0.05
0.15
0.2
0.25
0.1
1 1.5Flow rate (ℓ/min)
Relationship between flow rate and pressure (low flow rate)Pressure loss (MPa)
2 2.5 3 3.50 5
0
0.01
0.02
0.04
0.05
0.07
0.06
0.08
0.03
10 15Flow rate (ℓ/min)
Relationship between flow rate and pressure loss (standard)Pressure loss (MPa)
20 25
Relationship with Pressure Loss
○Use EFS2 within the set flow rate range. The set flow rate range varies depending on the fluid viscosity and temperature. Therefore, it is recommended to cause an abnormal flow rate on the actual equipment to set the trimmer.
○EFS2 is designed to measure the flow rate of water. If it is used for measurement of another fluid, the accuracy cannot be assured.○Never use it for flammable fluids.○If foreign particles may enter the fluid, install a filter on the primary side. If foreign particles adhere to the rotor of EFS2, correct measurement cannot be made.
○Before feeding a fluid, check the pressure reducing valve and flow rate adjusting valve. If pressure or flow higher than the rated value is applied to EFS2, its body may be damaged.
●When a flow meter is available (or when abnormal change in flow rate can be caused)①Reduce the flow rate in the piping to the set flow rate.②Then turn the flow rate setting trimmer of EFS2 to turn the LED red.
●When a flow meter is not available①Find the set flow rate on the vertical axis in the trimmer setting-flow rate characteristic graph, and find the setting scale value corresponding to the flow rate on the horizontal axis.
②Turn the flow rate setting trimmer on the side surface of EFS2 to set the trimmer to the value found in the graph.Note)①It is necessary to sufficiently predict the flow
rate fluctuation in the normal state to prevent occurrence of unnecessary alarms.
Setting procedures and fluid <Flow rate setting procedures>
Flow rate (ℓ/min)
WARNING
●When wiring the flow sensor, disconnect the power from the equipment on the electric circuit to be connected. Failure to do so may expose the worker to shock hazard or damage the flow sensor or load during wiring work.
●Check the supply voltage of the flow sensor to be used and the load voltage and current specifications. If the voltage or current is improper, the flow sensor may malfunction or be damaged.
●Take care not to apply bending, tensile or torsional load to the cable. Doing so may break the cable.●If the distance of the cable to the destination is long, secure the cable at intervals of 20 cm to prevent looseness of the cable. If the cable is loose, someone may catch his foot on the cable, thereby breaking it.●When the cable is laid on the ground, it may be stepped on directly or put under equipment and may be broken or short-circuited. Protect it with a metallic conduit or the like.
●Do not lay the cable close to the high-voltage wires of other electric devices or power sources. Do not bundle the cable together with power source cables. Noises from the high-voltage wires, power sources or power source cables will enter the flow sensor cable and cause the flow sensor and load to malfunction. It is recommended to protect the cable with a shield tube or the like.
●When wiring, check the wire colors. Incorrect wiring results in breakage, fault and malfunction of the flow sensor. Check the wire colors on this instruction manual prior to wiring.
For EFS2-*PS●When an induction load, such as a DC relay, is connected, take surge absorption measures, such as a diode. The back excitation voltage generated on the load when the output is turned off may damage the output element of the flow sensor.
The resistance shall be as high as the load resistance, and the capacitor value shall be determined by experiment.
Select a diode whose reverse breakdown voltage is 5 to 10 times higher than the circuit voltage and whose forward current is higher than the circuit current.
Determine the barrister cut-off voltage, Vc, under the following condition:Supply voltage<Vc<80 V
Wiring
●Never install this sensor in a piping zone which may be used as a scaffold. If excessive load is applied to the sensor, it may be damaged.
●Check that the device operates normally prior to use. After installing, repairing or maintaining it, conduct appropriate function inspection and leak check, and make sure that it has been correctly installed. If the user modifies it or removes the cover, the repair is not covered by warranty.●When installing it, take care not to drop or hit it or apply excessive impact to it. Even if the flow sensor body is not damaged, internal components may be damaged, and the sensor may malfunction.
●Install the flow sensor in a place where it will not be affected by vibration or impact.
Installation
●When piping the flow sensor, observe the tightening torque. If any pipe is tightened to a torque exceeding the specified torque range, the flow sensor may be damaged. If any pipe is tightened to a torque less than the specified torque range, the connected threaded portion may be loosened.
<Tightening torque range: 15 to 20 N・m >●When piping the flow sensor, never put a spanner on the plastic part. Doing so can damage the flow sensor. Put a spanner to the piping adapter (brass part).●Design and pipe the system so that the detecting flow path is kept filled with the liquid, for example, by raising the piping on the downstream side of the flow sensor. Particularly, when the sensor is installed vertically, feed the liquid in the upward direction. If there are air bubbles in the flow sensor or the fluid, the rotor speed will be higher than usual, the flow rate will change, and the output signal will be disturbed.●Before connecting the pipes, flush them. Take care that sealing tape cuttings, dust and rust do not enter the pipes.
●If the pipe size is sharply reduced in the piping zone or there is a throttle, such as a valve, on the primary side, cavitation occurs in the piping, and the flow rate cannot be measured correctly. Therefore, such measures shall be taken on the secondary side of the flow sensor.
●Do not apply thrust load to the piping zone.●Do not remove the piping adapters. If they are removed, they cannot be reused.
Piping
When EFS2-*PS is used●Before wiring, disconnect the power from the equipment on the electric circuit to be connected. Failure to do so may expose the worker to shock hazard or damage the flow sensor or load during wiring work.
●Do not use it out of the working voltage range (max. allowable voltage is 50 V DC). If voltage higher than the working voltage range or AC voltage is applied to the sensor, internal elements may be damaged or burnt out.
●Do not short-circuit the load. Internal elements may be damaged or burnt out.
●Take care not to wire the power supply in reverse polarity. Internal elements may be damaged or burnt out.
●Wire the power supply with a load. If the power supply is directly connected without a load, internal elements may be damaged or burnt out.
Notes on use of open collector output type sensor
Notes on protection of output circuit
EFS2Inductionload
+-
EFS2+-
EFS2+-
EFS2Load
AC power supply
EFS2
Short-circuiting of load
+-
EFS2
+-
Improper polarity
EFS2
No load
+-
WARNING
WARNING
CAUTION
CAUTION
Inductionload
Inductionload
Load
Load
Flow SwitchEFS3EFS3 Digital Flow Control System
36VM
Flow Switch EFS3Digital Flow
Control S
ystem EFS
337VM
Unit: mm
Product conforming to RoHS
LEDGreen
LEDYellow
LEDRed
The lamp lights when the flow rate exceeds
the upper limit setting. At this time, the
upper limit setting contact turns on.
This lamp lights when the flow rate becomes
lower than the lower limit setting. At this
time, the lower limit setting contact turns on.
This lamp is on while the flow rate is higher than
the lower limit setting and lower than the upper
limit setting. At this time, all contacts are off.
Main Body Specifications
Magneticproximity
EFS3-M-*
Ironproximity
EFS3-F-*
Magneticproximity
EFS3-M
Ironproximity
EFS3-F
Polyacetal
Water
Rc3/8
0 to 1.0 MPa
1.5 MPa
0 to +50℃(No condensing)
0 to +60℃(No freezing)
Output SpecificationsPhotocoupler
30 V DC Load current: 4 mA or less
Photocoupler
Max. allowable voltage: 30 V DC
Load current: 10 mA
How to order
EFS3 M- -
M Magnetic proximity typeF Iron proximity type
NoneRLLR
Standard typeLow flow rate type (from right to left)Low flow rate type (from left to right)
Flow rate level
Detection method
Model
Material of body
Working fluid
Port size
Working pressure range
Proof test pressure
Ambient temperature
Fluid temperature
Flow rate range
Reading accuracy
Repeatability
Alarm output response time
Installing direction
Flowing direction
Weight
Electrical SpecificationsCommon electrical specifications
24 V DC±10%
1 W or less
Power supply
Power consumption
Part Numbers of AccessoriesRotor
DF-RP
DF-RS
Rotor pin
DF-PS
Rotor cap
DF-RCPEFS3-M
EFS3-F
Model❶
Detect
ion me
thod❷
RL
Flow type❸
±5%FS
±2%
500 ms or less
Free
0.5 to 3ℓ/min 2.5 to 25ℓ/min
One direction
Approx. 320 g
Both directions
Approx. 300 g
Low flow rate type Standard type Frequency output
Alarm output
Alarm output
●Conforming to CE marking●Changes in flow rate can be monitored for two points, the lower and upper limits.●The display block consists of a display and LED lamps.●Two detecting methods, magnetic proximity type and iron proximity type, are available.●The switches can be installed in any posture. Straight run of pipe is not required.●Metallic adapters for piping are provided as standard accessories.●Low flow rate type switches are standardized.
Small-size high-performance skeleton body flow switches compactly integrated with digital display function
Dimensional DrawingsCableEFS3-*
CIC 6-core 0.18 mm2 1 m
Explanation of Operation
67
25.5
5579
25
(86)
5
22.5
φ45
35
48
692-Rc3/8
5582.5(RL: From right to left)
(RL: From right to left)
(LR: From left to right)
●Low flow rate type ●Standard type
82.5(LR: From left to right)
White : COM(-)Green : Frequency output(+)Yellow : OUT-LOW(+)
Black : 0 VBrown : OUT-HIGH(+)
Red : 24 V DC
OUT
OUT
IN
IN
UP
DOWN
SET
MODE1
MODE2
EFS3
EFS3
FLOW SWITCH
Note) The above drawings show the outline of ESF3-M-RL.In the case of ESF3-M-LR, the fluid flows in the reverse direction, and the dimensions of the adapter protrusions are reversed.
When water is fed to EFS3 Series flow switch, the rotor rotates. The rotor rotation is converted to an electrical signal to measure the flow rate.○Frequency output (See the graph.) The rotor rotation is converted to an electric pulse signal, and the signal is output.
Input terminalInternal power supplyDC
COM
PLC
EFS3
Input terminalDC power supply COM
PLC
EFS3
Green : Frequency output(+)
White : COM(-)
Yellow : OUT-LOW(+)
Brown : OUT-HIGH(+)
Black : 0 V
Red : 24 V DC
●Wiring proceduresWhen EFS3-* is used●When the PLC has a built-in power supply
Note) For details, read carefully the instruction manual for the PLC.
●When the PLC does not have a built-in power supply
Note) For details, read carefully the instruction manual for the PLC.
○Connection with PLC (programmable controller)
●When several flow switch outputs are connected in series to a load (e.g. to input to a PLC on an OR circuit), check for flow switch output leakage current. The load may operate due to the leakage current. Leakage current per output: ICEO≦0.1 mA
(VCEO=80 V Ta=25℃)
●When several flow switch outputs are connected in series to a load (e.g. to input to a PLC on an AND circuit), check for flow switch output residual voltage. The load may not operate due to the output residual voltage. Output residual voltage per output: VCEO≦0.8 V
(Ic=10 mA Ta=25℃)
Flow SwitchEFS3EFS3 Digital Flow Control System
38VM
Flow Switch EFS3Digital Flow
Control S
ystem EFS
339VM
Performance Curves
Relationship between flow rate and frequency
Flow rate (ℓ/min)
(standard)(low flow rate)
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
Frequency(Hz)
00
50.5
101.0
151.5
202.0
252.5
303.0
Magnetic proximityMagnetic proximity((sstandard)tandard)
Magnetic proximity(standard)
Iron proximityIron proximity((sstandard)tandard)Iron proximity(standard) Magnetic proximityMagnetic proximity
(low flow rate)(low flow rate)Magnetic proximity(low flow rate)
Iron proximityIron proximity(low flow rate)(low flow rate)Iron proximity(low flow rate)
EFS3-*PS(Frequency, switch output)
0 0.50
0.05
0.15
0.2
0.25
0.1
1 1.5Flow rate (ℓ/min)
Relationship between flow rate and pressure (low flow rate)Pressure loss (MPa)
2 2.5 3 3.50 5
0
0.01
0.02
0.04
0.05
0.07
0.06
0.08
0.03
10 15Flow rate (ℓ/min)
Relationship between flow rate and pressure loss (standard)Pressure loss (MPa)
20 25
Relationship with Pressure Loss
1.Name
Indicator specifications and setting procedures
UP DOWN SET
MODE1 MODE2
EFS3EFS3 FLOW SWITCH
Mode confirmationlamps
Operation buttons
Standard
Mode 1
Mode 2
Mode 3
Default
15.0
10.0
All LED lamps are on.
Mode
Low flow rateMode
Mode 1
Mode 2
Mode 3
Default
2.0
1.0
All LED lamps are on.
2. Defaults of parameters
Standard type Low flow rate typeMode
Mode 3
Initial mode
Mode 1
Mode 2
Function
Output forced switching
Instantaneous flowrate is displayed.
Alarm setting 1Upper limit
Alarm setting 2Lower limit
Default
ON
15.0 ℓ/min
10.0 ℓ/min
Setting range
─ ─
─
0.2 to 25.0 ℓ/min
0.1 to 24.9 ℓ/min
3. Explanation of parameters
Note 1: The flow rate can be set to up to 25 ℓ. However, use the flow switch at a flow rate of up to 3 ℓ/min.
Mode
Mode 3
Initial mode
Mode 1
Mode 2
Function
Output forced switching
Instantaneous flowrate is displayed.
Alarm setting 1Upper limit
Alarm setting 2Lower limit
0.2 to 3.0 ℓ/minNote 1
0.1 to 2.9 ℓ/minNote 1
Default
ON
2.0 ℓ/min
1.0 ℓ/min
Setting range
─ ─
─
・SET key: Use to select a mode.・MODE confirmation lamp: Indicates the current mode. MODE1: Alarm setting 1 (upper limit setting) MODE2: Alarm setting 2 (lower limit setting) MODE3: Output switching (All MODE1 and MODE2 confirmation lamps turn on.)UP key: Use to increase the setting. In MODE3, it turns on the output.DOWN key: Use to decrease the setting. In MODE3, it turns off the output.
Procedures for changing parameter setting〇Upper limit setting proceduresPress the SET button.The mode will change to the upper limit setting mode. (MODE1 lamp will turn on.)The upper limit setting will appear on the display. (The default is 15.0.)
Every pressing the UP button increments the setting by 0.1.(Pressing the DOWN button decrements the setting by 0.1.)
Keep pressing the UP button, and the setting will continue to increase.(Keep pressing the DOWN button, and the setting will continue to decrease.)To turn on the signal at 17 ℓ, set the value on the display to 17.0.
After setting, press the SET button.Then, the upper limit setting is complete.
〇Forced switching modeForced switching modePress the SET button three times, or press the SET button after the completion of setting of the lower limit, and the mode will change to the forced switching mode. (The MODE1 and MODE2 lamps will turn on.)Just after the mode is changed, the display is in the state shown in ①.Press the SET button, and the mode will return to the instantaneous flow rate display mode.
Flow rate
Alarm setting 1/Overflow(15ℓ/min) Alarm setting 2/Underflow(10ℓ/min)
LED
0 to 9 Switch
OFFONRed
10 to 14 Switch
OFFOFF
Yellow
15 to 25 Switch
ONOFF
Green
〇Example of setting
①When this display is shown, all signals are on.When the DOWN button is pressed in this state, the display will change to “OF.F.”
*The overflow setting key cannot be set to a value less than the underflow setting. *The underflow setting key cannot be set to a value more than the overflow setting.
②When this display is shown, all signals are off.Press the UP button, and the display will change to “- -.-.”
〇Lower limit setting proceduresPress the SET button twice, or press the SET button after the completion of setting of the upper limit, and the mode will change to the lower limit setting mode. (The MODE2 lamp will turn on.)The lower limit setting will appear on the display. (The default is 12.0.)
Note) If the upper limit has been set to 12 or less, a value smaller than the upper limit by -0.1 will be displayed.) Example) When the upper limit setting is 5.0, the lower limit setting is 4.9.Every pressing the UP button increments the setting by 0.1.(Pressing the DOWN button decrements the setting by 0.1.)
Keep pressing the UP button, and the setting will continue to increase.(Keep pressing the DOWN button, and the setting will continue to decrease.)To turn on the signal at 5 ℓ, set the value on the display to 5.0. After setting, press the SET button.Then, the lower limit setting is complete.
Flow SwitchEFS3EFS3 Digital Flow Control System
40VM
●When wiring the flow switch, disconnect the power from the equipment on the electric circuit to be connected. Failure to do so may expose the worker to shock hazard or damage the flow switch or load during wiring work.
●Check the supply voltage of the flow switch to be used and the load voltage and current specifications. If the voltage or current is improper, the flow switch may malfunction or be damaged.
●Take care not to apply bending, tensile or torsional load to the cable. Doing so may break the cable.●If the distance of the cable to the destination is long, secure the cable at intervals of 20 cm to prevent looseness of the cable. If the cable is loose, someone may catch his foot on the cable, thereby breaking it.
●When the cable is laid on the ground, it may be stepped on directly or put under equipment and may be broken or short-circuited. Protect it with a metallic conduit or the like.
●Do not lay the cable close to the high-voltage wires of other electric devices or power sources. Do not bundle the cable together with power source cables. Noises from the high-voltage wires, power sources or power source cables will enter the flow switch cable and cause the flow switch and load to malfunction. It is recommended to protect the cable with a shield tube or the like.
●When wiring, check the wire colors. Incorrect wiring results in breakage, fault and malfunction of the flow switch. Check the wire colors on this instruction manual prior to wiring.
Wiring
Installation
Piping
When EFS3-* is used●Before wiring, disconnect the power from the equipment on the electric circuit to be connected. Failure to do so may expose the worker to shock hazard or damage the flow switch or load during wiring work.
Notes on use of open collector output type switch
Notes on protection of output circuit
EFS3+-
EFS3+-
EFS3+-
EFS3
EFS3+-
EFS3
+-
EFS3+-
WARNING
WARNING
WARNING
CAUTION
When EFS3-* is used●When an induction load, such as a DC relay, is connected, take surge absorption measures, such as a diode. The back excitation voltage generated on the load when the output is turned off may damage the output element of the flow switch.
The resistance shall be as high as the load resistance, and the capacitor value shall be determined by experiment.
Select a diode whose reverse breakdown voltage is 5 to 10 times higher than the circuit voltage and whose forward current is higher than the circuit current.
Determine the barrister cut-off voltage, Vc, under the following condition:Supply voltage<Vc<80 V
Inductionload
Inductionload
Inductionload
CAUTION
●Do not use the flow switch out of the working voltage range (max. allowable voltage is 50 V DC). If voltage higher than the working voltage range or AC voltage is applied to the switch, internal elements may be damaged or burnt out.
●Do not short-circuit the load. Internal elements may be damaged or burnt out.
●Take care not to wire the power supply in reverse polarity. Internal elements may be damaged or burnt out.
●Wire the power supply with a load. If the power supply is directly connected without a load, internal elements may be damaged or burnt out.
Load
AC power supply
Short-circuiting of load
Improper polarity
No load
Load
Load
●Never install this switch in a piping zone which may be used as a scaffold. If excessive load is applied to the switch, it may be damaged.
●Check that the device operates normally prior to use. After installing, repairing or maintaining it, conduct appropriate function inspection and leak check, and make sure that it has been correctly installed. If the user modifies it or removes the cover, the repair is not covered by warranty.●When installing it, take care not to drop or hit it or apply excessive impact to it. Even if the flow switch body is not damaged, internal components may be damaged, and the switch may malfunction.●Install the flow switch in a place where it will not be affected by vibration or impact.
●When piping the flow switch, observe the tightening torque. If any pipe is tightened to a torque exceeding the specified torque range, the flow switch may be damaged. If any pipe is tightened to a torque less than the specified torque range, the connected threaded portion may be loosened.
<Tightening torque range: 15 to 20 N・m>●When piping the flow switch, never put a spanner on the plastic part. Doing so can damage the flow switch. Put a spanner to the piping adapter (brass part).●Design and pipe the system so that the detecting flow path is kept filled with the liquid, for example, by raising the piping on the downstream side of the flow switch. Particularly, when the switch is installed vertically, feed the liquid in the upward direction. If there are air bubbles in the flow switch or the fluid, the rotor speed will be higher than usual, the flow rate will change, and the output signal will be disturbed.
●Before connecting the pipes, flush them. Take care that sealing tape cuttings, dust and rust do not enter the pipes.
●If the pipe size is sharply reduced in the piping zone or there is a throttle, such as a valve, on the primary side, cavitation occurs in the piping, and the flow rate cannot be measured correctly. Therefore, such measures shall be taken on the secondary side of the flow switch.
●Do not apply thrust load to the piping zone.●Do not remove the piping adapters. If they are removed, they cannot be reused.