Post on 01-Feb-2021
Magnetostrictive Level Transmitter
Overview
“Söm-TekTM ” The SKMT liquid level transmitter satisfies the demand for an analog communication interface for sightglass (bypass chamber) applications. The SKMT transmitter provides a 4-20 mA output for most magnetic level gauge manufacturers and allows for mounting external to the chamber without interrupting the process.
SKMT transmitters are modular in design offering a selection of mounting options and pipe styles. The modularity also offers simple field replacement. Subject to local electrical codes, the sensing element and electronics can be removed from the transmitter pipe without disturbing the operation of the process saving both time and money.
The model SKMT transmitter uses HART communication for setup, calibration, and diagnostics. HART can be utilized via a hand-held communicator or with the Som-Tek setup software via a PC and HART to serial converter. The optional on-board display and keypad is also provided for local indication and programming.
WE GUARANTEE OUR QUALITYSATISFY YOUR REQUIREMENT
Magnetostrictive Level Transmitter
4 to 20 mA Analog Output with HART®
No Scheduled Maintenance or Recalibration
High Accuracy and Repeatability
AMS Aware
Explosion-proof and/or Intrinsically Safe
Features
Inventory Control
Process Vessel
Bypass Chamber
Applications
Petroleum and Petrochemical
Power Generation
Specialty Chemical
Markets
All specifications are subject to change. Contact SONIC MEASURE for specifications and engineering drawings that are critical to your application. Drawings contained in this document are for reference only.
Current Pulse Start pulse Magnetic
Float Assembly
Sensor Wire
Product Specificatioins
Dual Chamber COMPATIBILI TY MRA3/4 chamber compatibility avalible
Parameters Speci�cations
LEVEL OUTPUT
Measured variable:
Output signal /Protocol: 4 to 20 mA with HART®
Order length: Rigid pipe: 508 mm (20 in.) to 3658 mm (144 in.) § ∆∆ Contact factory for longer lengths.§ Order length equals the measurement range plus
the inactive zone.
Non-linearity: 0.02% F.S. or 0.794 mm (1/32 in.) *
* Whichever is greater
Repeatability: 0.01% F.S. or 0.381 mm (0.015 in.) *(any direction) † Contact factory for alternative materials.
ELECTRONICS
Input voltage:
Fail safe:
10.5 to 36.1 Vdc, 28 Vdc maximum for I.S. ATEX approval
High (21.4 mA), or Low (3.8 mA)
Reverse polarity protection: Series diode
Lightning/Transient protection:
Stage 1: Line-to-ground surge suppression; IEC 61000-4-5Stage 2: Line-to-line and line-to-ground transient suppressors; IEC 61000-4-4
CALIBRATION
Zero adjust range: Anywhere within the active length
Span adjust range: Full scale to 152 mm (6 in.) from zero
Parameters Speci�cations
ENVIRONMENTAL
Enclosure rating: NEMA Type 4X
Humidity: 0 to 100% relative humidity, non-condensing
Operating temperatures:
Electronics: -40 °C (-40 °F) to 71 °C (160 ºF)Sensing element:
-40 °C (-40 °F) to 1150°C (257 °F) ◊Higher temperatures are available using a small insulation pad.
◊. Contact factory for speci�c temperature ranges.
FIELD INSTALLATION
Housing dimensions:
Single cavity:127 mm (5 in.) by 123 mm (4.85 in.) 121 mm (4.75 in.) O.D.
MOUNTING
Rigid pipe: Hose clamp to chamber
WIRING
Connections: 2-wire shielded cable twisted pair,
DISPLAY
Measured variables: Product level
Size: 13 mm (0.5 in.)
Number of digits: 16
Total LeProduct levelvel or Interface Level
ELECTRICAL CONNECTIONSDual Compartment Housings: 3/4 in. cond¾ in. conduit opening, M20 for ATEX Version Single Cavity: 3/4 in. conduversionit opening, M20 for ATEX
explosion proofFM 3615C22.2 No. 30
Class I, Division 1, Groups B, C and D ••∆Class II, Division 1, Groups E, F and G ••Division 1, NEMA Type 4X
Intrinsically safe
FM 3610C22.2 No. 157
Class I, Division 1, Groups A, B, C and DClass II, Division 1, Groups E, F and GClass III, T4Division 1, NEMA Type 4X
•• Explosion-proof housing required
eN 50020 PTB 00 ATEX 2069X
II 1/2 G bzw. II 2 GEEx ia IIC T4 bzw.
The SKMT transmitter programming can also be performed by using handheld HART communicator device such as the Rosemount® 375 or 475.
ability to adjust the 4 and 20 mA seAny SKMT transmitter that is purchased with a display has the tpoints by pressing the appropriate button located at the bottom of the display.
Agency Approvals
HART ART® handheld communicator programming
Setpoint programming using the display
II 1/2 G bzw. II 2 GEEx d IIC T6 bzw.
SKMT E200 SKMT E300
SKMT A200
Level and interface■
■ Accuracy ±1mm 或 0.03% FS
■ Maximum ML: 22.3m
■ Proc. Temp.: -40~121℃
■ Proc. Pres.: Vaccum~5MPa
■ IP68
SKMT A100
Dual Housing■■ Measuring level & interface■ Accuracy: ±0.38mm or 0.01% FS■ Measureing Range: 0.15~9.1m■ Proc. Temp.: -196~427℃■ Proc. Pres.: Vaccum~26MPa■ IP 68
Bundled with MLG■■Single Housing■ Measuring level only■ Accuracy ±1mm 或 0.03% FS■Measureing 0.15~6.1m■Proc. Temp. -40~260℃■ IP67
■■■■■■■
Dual HousingMeasuring level & interfaceAccuracy: ±0.38mm or 0.01% FSMeasureing Range: 0.15~9.1m Proc. Temp.: -196~427℃Proc. Pres.: Vaccum~26MPa IP68
Single Housing■■■■
Measureing Range: 0.15~6.1m
■ Proc. Temp.: -74~149℃
■Proc. Pres.: Vaccum~15MPa
IP 67
Accuracy: ±1mm or 0.03% FS
SKMT A300
■■■■■■■
Dual Housing with MLGMeasuring level & interfaceAccuracy: ±0.38mm or 0.01% FSMeasureing Range: 0.15~9.1m Proc. Temp.: -196~427℃Proc. Pres.: Vaccum~26MPa IP68
Som-Tek SKMT Product Models
TRANSMITTER MODEL = 1SKMT = Magnetostrictive transmitter
TYPE = 2A100= Direct Insertion A200 = with External Chamber A300 =Bundled with SKMG
Installation = 3
S = side - side
=4
Material of EC Chamber =5
Housing Type =6
TR = 90° , housing top rightBR = 90° , housing bottom right
Electronics MountingT = Integral electronics top B = Intergal electonics bottom
=7
= Industrial pipe, 5/8 in. OD = Industrial pipe, ½ in. OD
MATERIALS OF Probe
=8
PROCESS CONNECTION TYPE =
9
X = Refer processs connection datasheet=
10
M4 = 4-20mA single loop
=
11
TEMPERATURE
0 = 0-121°C
UNIT OF MEASUREMENT =12
M =
Metric (millimeters) Encode length in millimeters if using metic
U = US Customary (inches) Encode length in inches if
13-17LENGTH=Ordr Length based on unit of measurement
Rigid/Sanitary transmitter: 508 mm (20 in.) to 3658 mm (144 in.) SPECIAL =
18S = Standard product X = Engineering special
E = Alumnim Single without display
Ordering Information
T = top X = other
Note: contact factory for other materials 1 = 304L stainless steel 2 = 316L stanless Steel 3 = HC-276 4 = Others
F = Aluminim Single with display
G = Stainless Steel Single without display
A = Aluminum Dual with display
B = Aluminum Dual without display
C = Stainless Steel Dual with display
D = Stainless Steel Dual without display
= 316L stainless steel = 316L stainless steel Probe Size
1 = 121-204 °C 3 = -73 - 0 °C 2 = 204 - 427 °C 4 = -196 - -73 °C
OUTPUT
M4L = 4-20mA single loop with LCD M4LH = 4-20mA single loop with LCD and HART
M4LM = 4-20mA output with LCD and Modbus M4LP = 4-20mA output with LCD and Profibus-DP
Programming and hardware accessories
HarDWare Part NuMBer
Hart to rs-232 adapter(SMAR H1-311) 380068
Process Connection Chart (
1/2” thread (only available to MBT series)3/4” thread1” thread
1-1/2” thread
2” thread
Others N/A
Magnetic Level Gauge Data Sheet
Specification Model(use selection guides on page 12 and 13)
CustomerInformation
Company:
Address:
State: Country:
Contact:
Tel:
Fax:
E-mail:
Name of medium: Density of medium: Viscosity of medium: Installation:Maximum operation pressure: Maximum operation temperature: Process connection: Materials of probe:Types of probe: Materials of chamber: Materials of components: Types of transmitter:Forms of output: Measuring range: Others:
(only available to magnetostrictive level transmitter) (only available to magnetostrictive level transmitter)(only available to float level transmitter)(only available to float level transmitter)
(insert length/spacing of flanges)
liquid level liquid level/interface
top mounting side mounting other
Yes No Yes No
Turbulence or fluctuation of liquid surfaceFlow or stir of liquidVibration of container Yes No
Address: 7545 Irvine Center Dr, Suite 200, Irvine CA92618
Tel: +1(888)959-5266
Email: Contact@sonicmeasure.com
Http://www.sonicmeasure.com
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