User Guide IM/AK1/14 Rev. F
AK101 and AK104Gas analyzer systems for Hydrogen-cooled alternators
The CompanyWe are an established world force in the design and manufacture of measurement products for industrial process control, flow measurement, gas and liquid analysis and environmental applications.
As a part of ABB, a world leader in process automation technology, we offer customers application expertise, service and support worldwide.
We are committed to teamwork, high quality manufacturing, advanced technology and unrivalled service and support.
The quality, accuracy and performance of the Company’s products result from over 100 years experience, combined with a continuous program of innovative design and development to incorporate the latest technology.
EN ISO 9001:2000
Cert. No. Q 05907
EN 29001 (ISO 9001)
Lenno, Italy – Cert. No. 9/90A
Stonehouse, U.K.
Electrical SafetyThis equipment complies with the requirements of CEI/IEC 61010-1:2001-2 'Safety Requirements for Electrical Equipment for Measurement, Control and Laboratory Use'. If the equipment is used in a manner NOT specified by the Company, the protection provided by the equipment may be impaired.
SymbolsOne or more of the following symbols may appear on the equipment labelling:
Warning – Refer to the manual for instructions Direct current supply only
Caution – Risk of electric shock Alternating current supply only
Protective earth (ground) terminal Both direct and alternating current supply
Earth (ground) terminalThe equipment is protected through double insulation
Information in this manual is intended only to assist our customers in the efficient operation of our equipment. Use of this manual for any other purpose is specifically prohibited and its contents are not to be reproduced in full or part without prior approval of the Technical Publications Department.
Health and Safety
To ensure that our products are safe and without risk to health, the following points must be noted:
1. The relevant sections of these instructions must be read carefully before proceeding.
2. Warning labels on containers and packages must be observed.
3. Installation, operation, maintenance and servicing must only be carried out by suitably trained personnel and in accordance with the information given.
4. Normal safety precautions must be taken to avoid the possibility of an accident occurring when operating in conditions of high pressure and/or temperature.
5. Chemicals must be stored away from heat, protected from temperature extremes and powders kept dry. Normal safe handling procedures must be used.
6. When disposing of chemicals ensure that no two chemicals are mixed.
Safety advice concerning the use of the equipment described in this manual or any relevant hazard data sheets (where applicable) may be obtained from the Company address on the back cover, together with servicing and spares information.
1
1 INTRODUCTION .......................................................... 2
2 DESCRIPTION.............................................................. 32.1 Model 6553 Display unit ..................................... 3
2.1.1 Range Display ....................................... 32.2 Model 006540203 or 006548000
Katharometer Analyzer Panel .............................. 42.3 Model 4234 500/4234 501
Power Supply Units (PSU) ................................... 42.4 Remote Indicator/Controllers .............................. 4
3 PREPARATION ............................................................. 53.1 Identification ....................................................... 5
3.1.1 Model 6553 Display unit ........................ 53.1.2 Model 006540 203 or 006548 000
Katharometer Analyzer Panel ................ 53.1.3 Model 4234 Power Supply Unit ............. 63.1.4 AK100 Ordering Information .................. 7
4 MECHANICAL INSTALLATION .................................... 84.1 Locating and Mounting System Items ................. 8
4.1.1 Model 6553 Display Unit ....................... 84.1.2 Katharometer Analyzer Panel ................ 94.1.3 Model 4234 Power Supply Unit ............. 94.1.4 Cubicle Mounted System .................... 10
4.2 Sample Gas Interconnections ........................... 11
5 ELECTRICAL INSTALLATION .................................... 125.1 Electrical Interconnections ................................ 12
5.1.1 Model 6553 Display Unit ..................... 135.1.2 Model 006540 203 and 0065480 00
Katharometer Analyzer Panel .............. 175.1.3 Model 4234 Power Supply Unit ........... 18
5.2 Intrinsically Safe Requirements .......................... 195.2.1 Cable Requirements ............................ 195.2.2 Recommended Cables ....................... 195.2.3 Installing Remote Ancillary Items ......... 195.2.4 Full Intrinsically Safe Requirements ...... 19
6 SETTING UP............................................................... 206.1 Katharometer Analyzer Panel –
Filling the Drying Chamber ................................ 206.2 Setting Sample Flow ......................................... 206.3 Electrical Checks .............................................. 21
6.3.1 Power Supply Unit Output ................... 216.3.2 Zener Diode Safety Barrier Devices ..... 216.3.3 Checking System Earth ....................... 21
7 CONTROLS & DISPLAYS .......................................... 227.1 Displays ............................................................ 227.2 Switch Familiarization ........................................ 22
8 START-UP ................................................................... 238.1 Instrument Start-Up .......................................... 238.2 Alarm Set Point ................................................. 23
8.2.1 Type of Alarm Action ........................... 238.2.2 Hydrogen alarm Set Point ................... 23
8.3 Electrical Calibration ......................................... 238.4 Gas Calibration ................................................. 23
8.4.1 Introduction ......................................... 238.4.2 Purge Gas ........................................... 238.4.3 Hydrogen ............................................ 24
9 OPERATION ............................................................... 259.1 Normal .............................................................. 25
9.1.1 Purging of Hydrogen Coolant Gas ....... 259.1.2 Filling with Hydrogen Coolant Gas ....... 25
9.2 Range 1 Operating Page .................................. 269.3 Range 2 Operating Page .................................. 269.4 Range 3 Operating Page .................................. 26
10 PROGRAMMING ........................................................ 2710.1 Range 1 ............................................................ 30
10.1.1 Access to Secure Parameters ............. 3010.1.2 Language Page ................................... 3010.1.3 Set Up Outputs Page .......................... 3010.1.4 Electrical Calibration Page ................... 32
10.2 Range 2 ............................................................ 3310.2.1 Access to Secure Parameters ............. 3310.2.2 Language Page ................................... 3310.2.3 Set Up Outputs Page .......................... 3310.2.4 Electrical Calibration Page ................... 35
10.3 Range 3 ............................................................ 3610.3.1 Access to Secure Parameters ............. 3610.3.2 Language Page ................................... 3610.3.3 Set Up Outputs Page .......................... 3610.3.4 Electrical Calibration Page ................... 38
11 MAINTENANCE .......................................................... 3911.1 General Maintenance ........................................ 39
11.1.1 Pressure .............................................. 3911.1.2 Flow .................................................... 3911.1.3 Leaks .................................................. 3911.1.4 Vibration.............................................. 3911.1.5 Contamination ..................................... 3911.1.6 Ambient Temperature .......................... 3911.1.7 Bridge Current .................................... 39
11.2 Diagnostic Tests ............................................... 3911.2.1 Checking Output of the PSU ............... 3911.2.2 Checking Integrity of Zener
Diode Safety Barrier Devices ............... 3911.2.3 Checking the Katharometer Output .... 39
11.3 Routine Maintenance ........................................ 3911.3.1 Hydrogen Katharometer
Calibration ........................................... 3911.3.2 Purge Gas Katharometer
Calibration ........................................... 4011.3.3 Changing Desiccant in
Drying Chamber .................................. 4011.4 Repair Maintenance .......................................... 40
11.4.1 Removing Liquid from KatharometerMeasurement Block ............................ 40
11.4.2 Removal/Replacementof an Indicator Unit .............................. 41
11.4.3 Error Messages ................................... 41
12 SPARE PARTS LIST ................................................... 4112.1 Consumables ................................................... 4112.2 Routine Maintenance Parts ............................... 4112.3 Repair Maintenance Parts ................................. 41
13 SPECIFICATION ......................................................... 42
CONTENTS
14 CE DECLARATION OF CONFORMITY...................... 44
2
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stinUretemorahtaK845600&935600tinUylppuSrewoP105/0054324
tinUlortnoC/yalpsiD3556
9991:48205NE stinUretemorahtaK845600&935600
0891:93005NE metsyS
Caution. This operating manual applies only to thosesystems that have been designed and constructed tothe standards specified in the schedules of the ATEXcertificates listed. The separate units to which thesecertificates apply are clearly identifiable by modelnumbers and the data on the identification and ATEXcertification labels fixed to them. Other combinations ofsimilar equipment built to any earlier specifications arenot covered by BASEEFA certificate numberBAS Ex 01E2044. This is particularly important wherenew replacement units are to be incorporated intoexisting installations covered by any earlier certificationstandards. If in any doubt about the installation ofparticular combinations of certified equipment, contactthe Company for advice before proceeding.
It is essential that units are installed strictly inaccordance with the appropriate standards forelectrical equipment for use in flammable atmospheres.Any deviation from the specified installation conditions,or any unauthorized repairs or adjustments caninvalidate the safety assurances given by thecertification of the unit.
The ultimate responsibility for any particular installation lies withthe installing user/contractor.
This manual gives the installation, operating and maintenanceinformation for the Company's Models AK101 & AK104Intrinsically Safe Gas Analyzer Systems, normally used withhydrogen-cooled electrical power generators.
The complete AK100 Analyzer system uses a combination ofthree different units. Each unit is certified independently for useas part of an intrinsically safe system to meet the standards ofthe ATEX directive 9/94/EC for use in association with Group IIC(hydrogen) hazardous atmospheres in accordance with thefollowing standards:
The different units of the system are:
1) Model 6553 Display Unit, available in several options. Theinputs to the unit are certified to code [EEx ia] IIC Tamb= –20to 40°C under BAS 01 ATEX 7043 certificate with the unitinstalled in the safe area only.
2) Model 006539-960K (or J) and 006548-001 KatharometerUnits that form part of an intrinsically safe Model 006540-203 and 006548-000 Katharometer Analyzer Panel. Theseunits are certified to code EEx ia IIC T4 Tamb= –20 to 55°Cunder BAS 01 ATEX 1042 certificate for installation in thehazardous area (ZONE 0).
3) Model 4234 500 and Model 4234 501 constant currentPower Supply Unit, that provide the supply for oneKatharometer Unit. These power supply units have theiroutput certified to code [EEx ia] IIC Tamb= –20 to 55°C underBAS 01 ATEX 7041 certificate for installation in the safe areaonly.
If further information or assistance is required, contact ourspecialist staff at one of the addresses on the back cover of thismanual. Specialist training courses can also be arranged at ourTraining Centre.
1 INTRODUCTION
3
98.8H2–CO2
UIIN O N S E
Hydrogen Purity
& Purge Gas Monitor
Range
Range SelectorSwitch
DigitalDisplayIndicators 1
2
3
Zero
Zero
F1
AK101
All the various system options comprise one or more of thefollowing units with the further option of fitting the display unitsand power supply units in a cubicle.
2.1 Model 6553 Display UnitThe display unit must be mounted in a safe area and is suitablefor panel mounting or installation into a control cubicle. The unithouses one or two Model 4689 digital display, each equippedwith protected access for zero adjustment, Model AK101 isequipped with a range selector switch – see Fig. 2.1. ModelAK104 is a single display for Hydrogen purity and as suchrequires no range change selector switch.
2.1.1 Range DisplayA selector switch for each display provides independentparameter selection as follows:
Position (1) Percentage of Hydrogen in Air by volume.Displayed on the upper display.This is the hydrogen purity measurement of thecoolant gas during normal operation of thesystem. The display covers a range of 85 to 100%or 80 to 100% hydrogen in air depending on therange selected. An alarm output and aretransmission signal (4 to 20mA) are provided.
Position (2) Percentage of Hydrogen in Purge gas* by volume.Displayed on the upper display.This range is for use in hydrogen filling or purgingoperation. Alarm output and a valueretransmission signal (4 to 20mA) are provided.
Position (3) Percentage of Air in Purge gas* by volume.This range is for use in purge gas filling or purgingoperations. Alarm output and a valueretransmission signal (4 to 20mA) are provided.
Each display defaults to NOT IN USE when not selected.
A further option of providing remote indication of range selectorswitch may be available, depending on the number of alarmsspecified.
The 4689 Display Units provide software specific to thekatharometer systems with relay action of the alarms fixed as'fail safe'. All user-programmable data can be protected fromunauthorized alteration by a programmable 5-digit securitynumber.
The zero adjustments on the front panel of the 4689 enableremote zeroing of the katharometers mounted in the hazardousarea. The adjustment access for a particular display is adjacentto the display and at the same level.
The 4689 has a protective case that can be removed for accessto the interior without removing the whole unit from the controlpanel.
The 4689 also contains encapsulated zener diode safety barrierdevices to limit the electrical energy that can be supplied fromthe instrument circuits into the hazardous area. These devicesare located below the display units, on a rail that MUST beearthed (grounded). A metal screening arrangement segregatesthe connections made to equipment in the hazardous area. Theunit is protected on the mains input side by two fuses, one foreach circuit, accessible from the front of the panel.
2 DESCRIPTION
Fig. 2.1 Model 6553 Display Monitor
UIIN O N S E
Hydrogen Purity
Monitor
DigitalDisplayIndicator
Zero
F1
AK104
*Note. Purge gas options include:CO2 (Carbon dioxide)N2 (Nitrogen)Ar (Argon)
4
ElectricalInterconnections
Flow Gauge
Gas SampleOutlet
Local ZeroAdjustment
Drying Chamber
KatharometerUnit Case
MeteringValve
GasSample
Inlet
2.2 Model 006540203 or 006548000Katharometer Analyzer Panel – Fig. 2.2Each panel comprises a metering valve, a drying chamber, athermally lagged katharometer (Model 006539 or 006548) and aflowmeter. These items are mounted on a flat panel suitable forfixing to a vertical surface close to the sample point. Thekatharometers are calibrated for the hydrogen puritymeasurement as well as hydrogen in purge gas* and air in purgegas*.
Each katharometer assembly incorporates a Wheatstone Bridgecomprising fine, glass-coated platinum filaments. One pair ofparallel arms is sealed in the reference gas and the other pairexposed to the sample gas.
When the intrinsically safe stabilized current from the 4234power supply unit (Model 4234 500 or 4234 501) is passedthrough this bridge, the temperature of the platinum filamentsrises to a point of thermal equilibrium. Under conditions that arearranged to give minimum radiation and convection heattransfer, the equilibrium temperature depends on the thermalconductivity of the gas surrounding the filament. Thus anydifference between the thermal conductivity of reference andsample gases causes an imbalance in the bridge; this imbalance(as a millivolt signal) is indicated by the display.
Zener diodes are connected across the input connections fromthe power supply unit to the katharometer in order to limit themaximum voltage that could be developed across the filamentbridge under external fault conditions. Under fault conditions thecurrent is limited to a safe value by the power supply unit.
2.3 Model 4234 500/4234 501Power Supply Units (PSU) – Fig. 3.3
Caution. Do not connect the mains supply to the PSUwith the output terminals open circuit.
Caution. Ensure that the PSU is correct for the mainssupply voltage available. A nominal 115V unit cannot beadapted for use with a nominal 230V supply, or viceversa.
To operate a katharometer unit in the hazardous area, one Model4234 PSU is required for each katharometer. The PSU suppliesa stabilized DC current output and must be mounted in the safearea. There are two versions available:
Model 4234 500 for a nominal 230V AC supply voltageModel 4234 501 for a nominal 115V AC supply voltage
The stabilized current output is current and voltage limited torestrict the energy supply into the hazardous area.
The PSU is housed in a metal case fitted with lugs for wall/panelmounting. Cable gland entries are provided at opposite ends ofthe case for supply voltage input and stabilized current outputcables to the hazardous area.
The circuit is protected by cartridge fuses. These fuses musthave a high breaking capacity (HBC) rating of 1500A to complywith the terms of the certification.
2.4 Remote Indicator/ControllersThe 6553 Display Unit has retransmission outputs forconnection to indicator/controllers, providing that they areinstalled in the safe area and the installation conforms to therequirements given in Section 5.1.
…2 DESCRIPTION
Fig. 2.2 Location of Items – Model 6540 203 and 6548 000 Katharometer Analyzer Panels
*Note. Purge gas options include:CO2 (Carbon dioxide)N2 (Nitrogen)Ar (Argon)
5
98.8H2–CO2
UIIN O N S E
Hydrogen Purity
& Purge Gas Monitor
Zero
Zero
Range
1 23
F2
Ex
ABB LimitedStonehouse England GL10 3TA
TYPE 4689/500, /501 (or /503)SERIAL No. ......................
ABB LimitedOldends Lane, Stonehouse,Glos. England GL10 3TA
GAS MONITOR TYPE 6553
ll (1)G
[EEx ia] llC Tamb=–20°C to + 40°C
BAS 01 ATEX 7043
ABB L i m i t e dOldends Lane, Stonehouse,Glos. England GL10 3TA
CodeSerial NoVoltageWatts Hz 50–60Year Manuf.Manufactured by:
Retaining Screw
0600
N4006
4689 Display Unit
Ex IntrinsicSafety Label
Ex Ex
ABB LimitedOldends Lane, Stonehouse,Glos. England GL10 3TA
Katharometer Type 006548
ll (1)GEEx ia llC T4
Tamb=–20°C to + 55°CBAS 01 ATEX 1042
N4006
ABB L i m i t e dOldends Lane, Stonehouse,Glos. England GL10 3TA
Type No.Serial No.Year of Manf.OutputZero GasRange
006548000
0600
Panel Reference No.
Model No.
UniqueReference No.
Gas Type
IntrinsicSafety Label
3.1 IdentificationIt is essential that installers and users clearly identify the variousunits of the monitoring system as follows:
3.1.1 Model 6553 Display Unit – Fig. 3.1Several versions of the 6553 Display Unit are available and aredefined by the code number explained in Section 3.1.4.
Identification and certification labels are fixed to the outside ofthe unit case as shown in Fig. 3.1. Use the ordering code tablein Section 3.1.4 to interpret the identification label code andobtain a precise description of the 6553 Display Unit.
Note. Location of the identification label on the 4689display unit is also shown in Fig. 3.1.
3 PREPARATION
Fig. 3.1 Typical Identification Labels and Locations –Model 6553 Display Unit
Fig. 3.2 Typical Identification Labels and Locations –Model 0065408000 Katharometer Analyzer Panels
3.1.2 Model 006540 203 or 006548 000Katharometer Analyzer Panels – Fig. 3.2The panel is identified by the reference number label as shown inFig. 3.2. The identification and certification labels of theindividual katharometer units (fixed to the katharometer case)are also shown in Fig. 3.2.
6
Ex
ABB L i m i t e dOldends Lane, Stonehouse,Glos. England GL10 3TA
CodeSerial NoVoltageWattsYear Manuf.Manufactured by: N4006
ABB LimitedOldends Lane, Stonehouse,Glos. England GL10 3TA
TYPE 4234500/501 POWER SUPPLY UNITS
ll (1)G
[EEx ia] llC (–20°C≤Ta≤55°C)
BAS 01 ATEX 7041
Ex
IntrinsicSafety Label
0600
3.1.3 Model 4234 Power Supply Unit – Fig. 3.3The identification and certification labels are fixed to the outsideof the unit case, as shown.
…3 PREPARATION
Fig. 3.3 Typical Identification Labels and Locations –Model 4234 Power Supply Unit
7
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H(syalpsiDegnar-3lauD 2 )saGegruPx2dnaytiruPH(egnar-3elgniS 2 )saGegruPx2dnaytiruP
yalpsiDytiruPnegordyHelgniS
1234
egnaRytiruPnegordyH%001ot%58/08
)evitceridXETAotmrofnoctonseod(%58ot%001)evitceridXETAotmrofnoctonseod(%08ot%001
123
saGegruP)ylno401KA(enoN
OC 2nogrA
negortiN
0123
*lenaPsisylanAsaGenoN
.xam)isp5(grab53.0erehpsomtaottnevrof(erusserpwoL.xam)isp5(grab53.0erehpsomtaottnevrof(spartemalf&erusserpwoL
.xam)isp541(grab01pooldesolcroferusserphgiH
0123
elcibuCelcibuctuohtiW
elcibuchtiW†rotalosisulpelcibuchtiW
†srotacidniylppusrewopdnasBCMsulprotalosisulpelcibuchtiW
0123
)noitpoelcibuChtiwelbaliavaylno(mralAwolFelpmaSsaGdettiftoN
)snoisrevlenapsisylanasagelgnis(401KAdna301KAdettifmralawolfenO)snoisrevlenapsisylanasaglaud(201KAdna101KAdettifmralawolfowT
012
ylppuSrewoPretemorahtaKenoN
zH06/05V511zH06/05V032
012
erutaeFlaicepS
enoNlaicepS
09
**slaunaMnoitcurtsnIdnaslebaLmetsyS
hsilgnEhcnerFnamreG
hsiloP
1237
***†
.201KAdna101KArofderiuqereraslenapsisylanAsaGowT.ytilibaliavarofyrotcaFhtiwkcehC
.ycnadnuder%001eriuqertahtsmetsys201KAotdettifyllamrontoN
3.1.4 AK100 Ordering Information
The equipment conforms with the requirements of ATEX directive for Class IIC gases to Code EEx ia IIC provided that the equipmentis installed in accordance with instructions provided.4.1 Locating and Mounting System Items
3 PREPARATION
8
366
(14.
4)
KatharometerIntrinsically
Safe Circuits
SignalConventional
Circuits
CableEntry
Mounting PanelThickness
6 (0.24) max.
346
(13.
62)
30 (1.18)
Mou
ntin
g P
anel
Dis
play
Fac
e
350
± 0.
5 (1
3.78
±0.2
)(C
utou
t)
Panel Cutout andMounting Requirements
Area ForClamping
Cams
50(1
.97)
70(2
.76)
3 (0.12)278 ± 0.5 (10.94±0.2)(Cutout)
%H2 IN CO2
95.0
290 (11.4) 30 (1.18) 227 (8.94)
%H2 IN AIR
95.0
PowerInput
12
3
Not Fittedto AK104
3 (0.12)
4.1 Locating and Mounting System Items4.1.1 Model 6553 Display Unit – Fig. 4.1
Note. The display unit must be located in the safe area of the application plant in a sheltered interior environment.
The display unit is designed for panel-mounting in a position to suit reading of the displays and with access to the rear for electricalinterconnections. The panel preparation requirements and installation dimensions are shown in Fig. 4.1. The display unit is securedto the panel by four adjustable cam brackets – two each side of the unit chassis.
4 MECHANICAL INSTALLATION
Fig. 4.1 Installation Dimensions – Model 6553 Display Unit
Dimensions in mm
9
148 (5.83)
38(1.5)
10(0.39)19
(0.7
5)
305
(12)
267
(10.
5)
610 (24)
572 ±0.3 (22.5±0.01)
233
(9.1
7)
Outlet
19 (0.75)
Gland for Ø7 to 10.5 (0.28 to 0.41) Cable
4 FixingHoles Ø10 (0.39)
Note. Coupling forØ6 (0.24) Tube (006548000) orØ8 (0.31) Tube (006540203)
SeeNote
SeeNote
140
(5.5
) Cen
ters
110 (4.33) Centers
170 (6.7) 111 (4.37)
120
(4.7
2)
All Holes 7.0 (0.28) Diameter
160
(6.3
)
83
20 (0.79)
30(1
.18)
60 (2
.36)
Cen
ters
Ensure a clearance of at least 100 (4) atboth ends of the unit for acces to the cableglands and to minimize cable bends.
Mains CableEntry
Not Used
Output toKatharometer
3.0 (0.12)
20 (0.79)
30(1
.18)
30(1.18)
4.1.2 Katharometer Analyzer Panel – Fig. 4.2
Note. The panel may be located in the hazardous area (Zone 0, 1 or 2) of the application plant in a sheltered interiorenvironment.
Avoid a location that subjects the katharometer unit to direct sunlight. When two katharometer panels are used locate them inpositions that have the same ambient temperature.
The katharometer unit is fixed to the panel that has fixing holes at each corner for mounting on a suitable vertical surface close to thesample tapping point. The installation dimensions for the panel are shown in Fig. 4.2.
4.1.3 Model 4234 Power Supply Unit – Fig. 4.3
Note. The unit must be located in the safe area of the application plant in a sheltered interior environment.
The power supply unit has four fixing lugs for mounting on a suitable vertical surface. The installation dimensions are shown in Fig. 4.3.
4 MECHANICAL INSTALLATION…
Fig. 4.2 Installation Dimensions –Model 006540 203 or 006548 000 Katharometer Analyzer Panel
Fig. 4.3 Installation Dimensions – Model 4234 Power Supply Unit
Dimensions in mm (in.)
Dimensions in mm (in.)
10
Hydrogen Purity& Purge Gas Monitor
ø12 (0.47)
Hazardous AreaCable Glands
Safe AreaCable Glands
Mains PowerCable Glands
478(18.8)
600 (24.6)
140 (5.53)
80 (3.15)
80(3.15)340 (13.4)
382(15.04)
%H2 IN CO2
95.0
%H2 IN AIR95.0
4 Mounting Bracketsø10 (0.39) hole
12 3
515 (20.28) 40(1.57)
630 (24.8)
110(4.33)
Optional Mains Isolator(not fitted to those systems thatrequire 100% redundancy)
4.1.4 Cubicle Mounted System – Figs 4.4 and 4.5The cubicle must be located in a safe area of the application plant and mounted either on the base using four M10 fixings or to avertical surface using the four fixing brackets on the back-plate.
Overall dimensions of the cubicle are given in Fig. 4.4 and the principal base case components are shown in Fig. 4.5.
…4 MECHANICAL INSTALLATION
Fig. 4.4 Installation Dimensions – Cubicle
Dimensions in mm (in.)
Cubicle sealed to IP55
Weight of cubicle assembly 56kg (123lb ) max.
11
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 1 2 3 4 5 6 7 8 9 10 11 12 13 L N E L N E14 15 16 17 18 19 20 21 22 23 24 25 26
Note. The number of terminals, cable glands, low-flow alarms, PSU's and zener barriers(flow alarms) vary according to ordering information details specified.
Relay No. 2
Relay No. 1
POWERSUPPLY
UNIT No 1
POWERSUPPLY
UNIT No 2
No. 1 No. 2BARRIER FLOW
ALARM
E SCR S1 S2 0V 0V -12V+12V
CH 1
I N COM NC NO
E SCR S1 S2 0V 0V -12V+12V
CH 1
I N COM NC NO
1 2 1 2
3 4 3 4
Barriersfor Low Flow Alarms(if fitted)
Low Flow AlarmRelay 2 (if fitted)
Mains PowerCable Glands
Earth Point (Ground) Low Flow AlarmRelay 1 (if fitted)
Cable Glands for CableTerminations in
Hazardous Areas
Cable Glands forCable Terminations
in Safe Areas
To Cubicle Earth
Power SupplyUnit 2 (if fitted)
Power SupplyUnit 1
Terminal Block
MAINSTERMINAL
BLOCKKATHAROMETER
TERMINAL BLOCKLOW FLOW
ALARMSALARMS AND
RETRANS
Note. A hazardous mixture of hydrogen-in-air could develop in the event of leakage from the sample gas system.Katharometer Analyzer panels must be located in a ventilated area.
The sample pressure must not exceed 0.35bar (Gauge) for Model 6540–203 and 10bar (Gauge) for Model 6548–000.
The incoming sample gas temperature must not exceed 55°C (131°F). Ideally the sample gas temperature should be allowed to reachambient temperature before entry to the katharometer unit.
If there is a risk of significant particle contamination incorporate a suitable 1μm filter unit in the system before the sample gas entersthe Analyzer system.
Compression couplings are supplied at the sample inlet and outlet to the katharometer panel. These couplings are suitable forconnecting 8mm (0.31 in.) (Model 006540 203) or 6mm (0.24 in.) (Model 006548 000) outside diameter metal tube. It isrecommended that stainless steel tube is used.
The complete tubing system should be tested for leaks in accordance with the requirements of the responsible authority.
4 MECHANICAL INSTALLATION…
Fig. 4.5 Location of Main Components on Cubicle Backplate
4.2 Sample Gas Interconnections
12
Saf
e A
rea
See
Not
e 9
Not
e 1
App
arat
us w
hich
is u
nspe
cifie
d ex
cept
that
it m
ust n
ot b
e su
pplie
d fro
m n
or c
onta
in in
nor
mal
or a
bnor
mal
con
ditio
ns a
sou
rce
of p
oten
tial w
ith re
spec
t to
eart
h in
exc
ess
of 2
50 v
olts
r.m
.sor
250
vol
ts d
.c.
Not
e 2a
The
capa
cita
nce
and
eith
er th
e in
duct
ance
or
the
indu
ctan
ce to
resi
stan
ce (L
/R) r
atio
of t
heca
ble
conn
ecte
d be
twee
n th
e +
and
– te
rmin
als
of th
e po
wer
sup
ply
Type
423
4500
/501
and
term
inal
s 1
and
4 o
f a k
atha
rom
eter
Typ
e 00
65XX
mus
t not
exc
eed
the
follo
win
g va
lues
:
Haz
ard
ous
Are
a
See
Not
es 2
& 3
24
15
36
24
15
36
24
15
36
TB5
1817
TB6 1
9 20
PO
WE
R S
UP
PLY
TYP
E 4
234
500/
501
CE
RTI
FIE
D [E
Ex
ia] I
IC(–
20°C
≤Ta
≤+55
°C)
CE
RTI
FIC
ATE
No
BA
S 0
1 AT
EX
7041
- +
21 3 21 3RS
1
RS
2
B1
B2
B3
6553
Dis
pla
y/C
ont
rol U
nit
– +
Indi
cato
r46
89I1
– +
Indi
cato
r46
89I2
4 –
1+ 9 10 3 – 2+
KAT
HA
RO
ME
TER
TYP
E 0
065X
XX
CE
RTI
FIE
D E
Ex
ia II
C T
4
Tam
b=–2
0°C
to +
55°C
CE
RTI
FIC
ATE
No
BA
S 0
1 AT
EX
1042
3 –
2+ 10 4 – 1+6 –
9
KAT
HA
RO
ME
TER
TYP
E 0
065X
XX
CE
RTI
FIE
D E
Ex
ia II
C T
4
Tam
b=–2
0°C
to +
55°C
CE
RTI
FIC
ATE
No
BA
S 0
1 AT
EX
1042
Junc
tion
boxe
s (if
requ
ired)
see
not
e 6.
Loca
tion:
Haz
ardo
us A
rea
or S
afe
Are
a
See
Not
e 1
See
Not
e 1
Junc
tion
boxe
s (if
requ
ired)
see
not
e 6.
Loca
tion:
Haz
ardo
us o
r S
afe
Are
a
RV
1
RV
2
Dis
pla
y/C
ont
rol U
nit
Mo
del
655
3C
ER
TIF
IED
[EE
x ia
] IIC
Tam
b=
–20°
C t
o +
40°C
CE
RT
No
BA
S 0
1 AT
EX
704
3
Gro
upC
apac
itanc
ein
μF
Indu
ctan
cein
mH
L/R
rat
ioin
μH
/Ohm
IIC IIB IIA
7.5 99 999
0.02
0.06
0.16
20 60 160
or
Gro
upC
apac
itanc
ein
μF
Indu
ctan
cein
mH
L/R
rat
ioin
μH
/Ohm
IIC IIB IIA
38 999
999
0.40
1.20
3.20
75 225
600
or
Gro
upC
apac
itanc
ein
μF
Indu
ctan
cein
mH
L/R
rat
ioin
μH
/Ohm
IIC IIB IIA
38 999
999
0.20
0.60
1.60
40 120
320
or
Not
e 2b
The
capa
cita
nce
and
eith
er th
e in
duct
ance
or
the
indu
ctan
ce to
resi
stan
ce (L
/R) r
atio
of t
he c
able
sco
nnec
ted
betw
een
(a) t
erm
inal
s 17
& 1
8 of
the
disp
lay/
cont
rol u
nit T
ype
6653
and
term
inal
s 9
& 1
0of
a k
atha
rom
eter
Typ
e 00
65XX
, (b)
term
inal
s 19
& 2
0 o
f the
dis
play
/con
trol
uni
t and
term
inal
s 9
& 1
0of
a k
atha
rom
eter
Typ
e 00
65XX
, (c)
term
inal
4 &
5 o
f bar
rier
B1
of d
ispl
ay/c
ontr
ol u
nit T
ype
6653
and
term
inal
s 2
& 3
of a
kat
haro
met
er T
ype
0065
XX, m
ust n
ot e
xcee
d th
e fo
llow
ing
valu
es:
Not
e 2c
The
capa
cita
nce
and
eith
er th
e in
duct
ance
or
the
indu
ctan
ce to
resi
stan
ce (L
/R) r
atio
of t
he c
able
sco
nnec
ted
betw
een
4 &
5 o
f bar
rier
B2
plus
term
inal
4 o
f bar
rier
B3
of d
ispl
ay/c
ontr
ol u
nit T
ype
6653
and
term
inal
s 2,
3 &
6 o
f a k
atha
rom
eter
Typ
e 00
65XX
, mus
t not
exc
eed
the
follo
win
g va
lues
:
See
Not
es 2
& 3
Circ
uit A
Circ
uit B
(see
Not
e 8)
Not
e 3
The
cabl
e m
ay b
e se
para
te c
able
s or
may
be
inst
alle
d as
sep
arat
e ci
rcui
ts w
ithin
a ty
pe ‘A
’ or a
type
‘B’
mul
ticor
e ca
ble
as d
efin
ed in
EN
5003
9(19
80) s
ubje
ct to
the
follo
win
g:a.
Eac
h ci
rcui
t sha
ll be
indi
vidu
ally
scr
eene
d w
ithin
a ty
pe ‘A
’ mul
ticor
e ca
ble.
b.Th
e pe
ak v
olta
ge o
f any
oth
er c
ircui
t with
in a
type
‘B’ m
ultic
ore
cabl
e m
ust n
ot e
xcee
d 60
vol
ts.
Not
e 4
The
inst
alla
tion
mus
t com
ply
with
nat
iona
l req
uire
men
ts (e
.g. i
n th
e U
K E
N60
079-
14:1
997)
.N
ote
5Th
e sy
stem
mus
t be
mar
ked
with
a d
urab
le la
bel.
The
labe
l sho
uld
appe
ar o
n or
adj
acen
t to
the
prin
cipa
lite
m o
f ele
ctric
al a
ppar
atus
in th
e sy
stem
or
at th
e in
terfa
ce b
etw
een
the
intr
insi
cally
saf
e an
d no
n-in
trin
sica
lly s
afe
circ
uits
.Th
is m
arki
ng s
hall
incl
ude
the
wor
d S
YS
T or
SY
STE
M, e
.g.
‘BA
S S
YS
TEM
No
Ex
01E
2044
’ or
‘BA
S N
o E
x 01
E20
44 S
YS
T’N
ote
6A
junc
tion
box,
if u
sed,
mus
t sat
isfy
the
requ
irem
ents
of C
laus
es 6
.1 a
nd 6
.3.1
of E
N50
020:
1994
.N
ote
7C
ircui
t A o
r C
ircui
t B m
ay b
e om
itted
.N
ote
8C
ircui
t B m
ay b
e id
entic
al to
Circ
uit A
.N
ote
9Th
is it
em m
ay o
r m
ay n
ot b
e fit
ted.
PO
WE
R S
UP
PLY
TYP
E 4
234
500/
501
CE
RTI
FIE
D [E
Ex
ia] I
IC(–
20°C
≤Ta
≤+55
°C)
CE
RTI
FIC
ATE
No
BA
S 0
1 AT
EX
7041
- +
See
Not
e 10
Not
e 10
Zenn
er b
arrie
rs (B
1, B
2 &
B3)
eith
er M
TL 7
055a
c B
AS
99
ATEX
728
5 or
MTL
775
5ac
BA
S 0
1 AT
EX 7
217
(M
TL 7
055a
c ba
rrie
rs s
how
n on
dia
gram
).
5.1 Electrical Interconnections – Fig. 5.1
5 ELECTRICAL INSTALLATION
Fig. 5.1 System Diagram
13
Zero Adjustmentfor Remote Katharometers(only 1 fitted to AK104)
ClampCam
Mains PowerSupply Fuse
3-way MainsSupply TerminalBlock
Type : 4689Upper DisplayUnit %H2 in Air
Type 4689Lower Display Unit(not fitted on AK104)%H2 and Air in Purge Gas
Zener Diode SafetyBarrier Devices(B2, B3 not fitted to AK104)
Terminal Block (TB5 & TB6)for Katharometer Zero Pots.Intrinsically Safe Circuits(TB6 not fitted to AK104)
Safety EarthTerminal (TS1)
Terminal Blocks forPower and SignalConventional Circuits(TB3 not fitted to AK104)
Range Switch(AK101 only)
L N E 161
TB1
TB3
TB4
TB5 TB6
B1 B2 B3
Warning.
• Equipment in this system operates on AC mainssupply voltage electricity. Suitable safetyprecautions must be taken to avoid the possibility ofelectric shock.
Caution.
• Although certain instruments are fitted with internalfuse protection, a suitably rated external protectiondevice, either a 3A fuse or miniature circuit breaker(MCB) must also be fitted by the installer.
• The proper electrical connections and wiringstandards must be achieved to establish the intrinsicsafety of the system, as certified.
• AC input, intrinsically safe DC output and non-intrinsically safe wiring must all be routed separately.
Fig. 5.1 shows the interconnecting wiring requirements for theAK100 Gas Analyzer system, that must be strictly observed.Details of cable requirements, that must be strictly adhered to,are also given – see Section 5.2.1.
After completing the wiring, check that the continuity earthing(grounding) and isolation of all circuits is to the required localelectrical standards for intrinsically safe circuits.
The separate units of the Analyzer system must beinterconnected as shown in Sections 5.1.1, 5.1.2 and 5.1.3.
5.1.1 Model 6553 Display Unit – Fig. 5.2
Caution. No connections must be made to thehazardous area terminals (Terminal Blocks TB5 & TB6)other than as specified in wiring diagram Fig. 5.3. Theappropriate cable requirements must be strictlyadhered to.
Remove the outer case from the back of the unit to gain accessto the terminal blocks.
Make electrical connections through the bottom of the unit intothe terminal blocks immediately above them – see Fig. 5.2.
The alarm and signal outputs on terminal blocks TB3 & TB4 maybe connected as required. The availability of signal outputs varywith the particular 6553 system – refer to Fig. 5.3 for details.
Make the wiring connections in accordance with the informationgiven in the wiring diagram Fig. 5.3 and Section 5.1.
Refer Fig. 5.4 for connections to cubicle-mounted display unit.
Continued on page 17.
5 ELECTRICAL INSTALLATION…
Fig. 5.2 Location of Components Inside Case (Rear View) – Models AK101 and AK104 Display Units
14
Ext
erna
lpo
wer
sup
ply
TB1 1 2 3 4 5 6 7 8 9 10
Kat
haro
met
erU
nit G
as P
anel
2%
H2
and
Air
in P
urge
Gas
TB1
1 2 3 4 5 6 7 8 9 10
Kat
haro
met
erU
nit
Gas
Pan
el 1
(H2
in A
ir)
TB1
TB2
Pow
er S
uppl
y U
nit 2
4234
LN
E
TB1
TB2
Pow
er S
uppl
y U
nit 1
4234
LN
E
Ext
erna
lpo
wer
sup
ply
No
te. I
nter
conn
ectio
nsm
arke
d w
ith
M
US
T co
nfor
m to
the
intr
insi
cally
saf
e w
iring
requ
irem
ents
give
n in
the
text
.
All
othe
r w
iring
to s
uit p
ower
and
sig
nal
requ
irem
ents
+–
+
–
Zene
r di
ode
safe
tyba
rrie
r de
vice
sC
onne
ctio
ns fo
r Lo
wer
Dis
play
Con
nect
ions
for
Upp
er D
ispl
ay
L N
E
12
34
56
78
910
1112
1314
1516
TB4
NO
NC
CO
M
Rem
ote
Ran
ge(if
fitt
ed)
H2
in P
urge
Gas
*or
Air
in P
urge
Gas
*A
larm
1
Pur
ge G
as V
alue
Ret
rans
mis
sion
+
–
12
34
56
78
910
1112
1314
1516
Ext
erna
l bon
ding
and
eart
h
TS1
TB3
Mo
nito
r
1718
1920
B1
4
3B
24
3
TB5
TB6
TB1 N
ote
.K
atha
rom
eter
Gas
Uni
t Pan
el 1
is c
onne
cted
inte
rnal
ly w
ithin
655
3 G
as M
onito
r to
Upp
er D
ispl
ay.
Kat
haro
met
er G
as U
nit P
anel
2 is
con
nect
ed in
tern
ally
with
in 6
553
Gas
Mon
itor
to L
ower
Dis
play
.
B1
5
4B
25
4
MTL
775
5ac
MTL
705
5ac
NO
NC
CO
M
Ala
rm 1
H2
in A
ir
NO
NC
CO
M
Ala
rm 2
H2
in A
irH
2 in
Air
Valu
eR
etra
nsm
itB
34
3
B3
5
4
+ + – – –
+ –
Common
Range 3
Range 2
Range 1 + –
…5 ELECTRICAL INSTALLATION
Fig
. 5.3
Inte
rco
nnec
tio
n W
irin
g D
iag
ram
– A
K10
1 In
trin
sica
lly S
afe
Ana
lyze
r S
yste
m (H
ydr o
gen
Pur
ity
and
Pur
ge
Gas
)
*No
te. P
urge
gas
opt
ions
incl
ude:
CO
2(C
arbo
n di
oxid
e)N
2(N
itrog
en)
Ar
(Arg
on)
15
5 ELECTRICAL INSTALLATION…
TB1
1 2 3 4 5 6 7 8 9 10
Kat
haro
met
erU
nit
Gas
Pan
el 1
(H2
in A
ir)
TB1
TB2
Pow
er S
uppl
y U
nit 1
4234
LN
E
Ext
erna
lpo
wer
sup
ply
No
te. I
nter
conn
ectio
nsm
arke
d w
ith
M
US
T co
nfor
m to
the
intr
insi
cally
saf
e w
iring
requ
irem
ents
give
n in
the
text
.
All
othe
r w
iring
to s
uit p
ower
and
sig
nal
requ
irem
ents
+
–
Zene
r di
ode
safe
tyba
rrie
r de
vice
s
L N
E
12
34
56
78
910
1112
1314
1516
TB4
Ext
erna
l bon
ding
and
eart
h
TS1
Mo
nito
r
1718
B1
4
3
TB5
TB1 N
ote
.K
atha
rom
eter
Gas
Uni
t Pan
el 1
is c
onne
cted
inte
rnal
ly w
ithin
655
3 G
as M
onito
r to
Upp
er D
ispl
ay
B1
5
4
MTL
775
5ac
MTL
705
5ac
NO
NC
CO
M
Ala
rm 1
H2
in A
ir
NO
NC
CO
M
Ala
rm 2
H2
in A
irH
2 in
Air
Valu
eR
etra
nsm
it
+
–
+ –
+ –
Fig
. 5.3
a In
terc
onn
ecti
on
Wir
ing
Dia
gra
m –
AK
104
Intr
insi
cally
Saf
e A
naly
zer
Sys
tem
(Hyd
r og
en P
urit
y)
16
12
34
56
78
9
Kat
haro
met
ers
1011
1213
12
34
56
78
910
1112
1323
2425
2614
1516
1718
1920
2122
L L
L
Mai
ns T
/B65
53 O
utpu
tsU
pper
Dis
play
%H
2 in
Air
6553
Out
puts
Low
er D
ispl
ay(A
K10
1 on
ly)
%H
2 an
d A
ir in
Pur
ge G
as
N/O
Common
N/C
N/O
Common
N/CN/O
CommonN/C
CommonRange 3Range 2Range 1
Cub
icle
Ter
min
al B
lock
s +–
+
–
Air in Purge Gas*or
H2 in Purge Gas*Aarm 1
H2 in AirAlarm 1
H2 in AirAlarm 2
Retransmission
Retransmission
Range SelectorSwitch Position
Indicator
23
910
14
Kat
haro
met
erP
anel
1
23
910
14
Kat
haro
met
erP
anel
2
Haz
ard
ous
Are
aN
ote
. I.S
. Circ
uits
It is
impe
rativ
e th
at w
iring
inst
ruct
ions
are
follo
wed
impl
icitl
y.E
arth
con
tinui
ty m
ust b
e ch
ecke
d fo
r co
rrec
t bon
ding
.
No
te.
Kat
haro
met
er P
anel
1 is
con
nect
ed in
tern
ally
to th
e U
pper
Dis
play
of t
he 6
553
Dis
play
/Con
trol
Uni
t.K
atha
rom
eter
Pan
el 2
is c
onne
cted
inte
rnal
ly to
the
Low
er D
ispl
ay o
f the
655
3 D
ispl
ay/C
ontr
ol U
nit (
AK
101
only
).
1415
1617
1819
2021
2223
24
Low
Flo
wA
larm
sE
x ia
llC
T4
Low
Flo
wA
larm
Rel
ays
23
14
23
14
N N
N
CommonN/CN/O
CommonN/CN/O
Relay 1
Relay 2
Term
inal
Box
ScreenBlack
RedWhite
ScreenBlack
RedWhite
Kat
haro
met
erH
2 &
Air
in P
urge
Gas
Kat
haro
met
erH
2 in
Air
++
––
++
––
If fit
ted
E E
E
13
E
24
LN
E
Mai
ns Is
olat
orS
witc
h(if
fitt
ed)
Mai
ns InInt
erna
lW
iring
6 –
…5 ELECTRICAL INSTALLATION
Fig
. 5.4
Wir
ing
Dia
gra
m f
or
Cub
icle
-Mo
unte
d D
isp
lay
Mo
nito
r
*No
te. P
urge
gas
opt
ions
incl
ude:
CO
2(C
arbo
n di
oxid
e)N
2(N
itrog
en)
Ar
(Arg
on)
17
Zero AdjustmentPotentiometer
MeasuringUnit
TubingConnections
Terminal Block (TB1)
DummyRemote Zero
Resistor
Remove whenConnecting
Remote Zero
Mounting Pillars
10
912
11
10
9
8
7
6
5
4
3
2
1
Inlet Outlet
–
–
–
+
+
Caution. The integrity of the fail-safe operation of the zener diode safety barrier devices depends on a Safety Earthconnection which must not have a resistance greater than 1Ω to the application plant earth (ground).
Make the Earth (Ground) and Safety Earth connection at the stud (TS1) – see Fig. 5.2.
On completion of wiring and checks, replace the outer case and secure the clamping brackets to the mounting panel.
5.1.2 Model 006540 203 and 006548 000 Katharometer Analyzer PanelTo gain access to the connection terminal block TB1:
1) Remove four screws in the cover of the katharometer unit.
2) Remove cover
Make the electrical connections to the Display Unit in accordance with the information given in wiring diagrams in Figs 5.3, 5.4 and5.5 and Section 5.2.
The electrical connections are made at the terminal block (TB1) via the cable gland or any replacement gland to suit the intrinsicallysafe wiring requirements. When the appropriate interconnections have been made, if remote zero is to be used, remove the 510Ωdummy remote zero resistor from across terminals 9 and 10 and set the zero adjustment potentiometer on the katharometer to theapproximate mid-point.
Replace the cover when wiring is complete.
5 ELECTRICAL INSTALLATION…
Fig. 5.5 Location of Components Inside Case – Model 006539 and 006548 Type Katharometer Unit
18
TB1
T1
L N EF2 F3
Note. Hazardous Voltages.There are no servicable parts in this unit.Please return to the manufacturer if faulty, orseek the services of a qualified engineer.
Ensure that the mains supply is switched offand disconnected before removing the coverfor any reason.
6
8
10
230 V
115 V
Output Current (mA) Links350 C to X250 D to X180 E to X
NO connections should be made topoints A or B
TB2
–
+F1
BA
C X
D E
M5 Earth Stud
Cable Gland forAC Mains Input
OutputCurrentLinks
Cable Gland not used
Cable Gland forDC Output toKatharometer
Mains InputTerminal Block
DC OutputTerminal BlockFuses*
*Refer to the 4234 manual for fuse details.
5.1.3 Model 4234 Power Supply Unit – Fig. 5.6
Caution. Do NOT connect mains supply to the power supply unit with the output terminals on open circuit.
Note. Ensure that the power supply unit is correct for the mains supply voltage available. A nominal 115V unit cannot beadapted for use with a nominal 230V supply or vice versa.
Remove the cover of the unit to gain access to the terminal blocks inside.
Identify the terminal block (TB1) adjacent to the transformer T1 and ensure the correct transformer tapping is used for the incomingmains supply, i.e.
link from tapping 6 to 10 for 230V, orlink from tapping 8 to 10 for 115V.
Make electrical connections in accordance with the information given in the wiring diagrams Figs 5.1 and 5.3 and the cable detailsin Section 5.2.1.
The electrical connections are made at terminal blocks TB1 and TB2 through the appropriate cable gland or any replacement glandto suit intrinsically safe wiring requirements. Secure the incoming cable by the cable clips adjacent to the terminal blocks.
Replace the cover when wiring is complete.
…5 ELECTRICAL INSTALLATION
Fig. 5.6 Location of Components Inside Case – Model 4234 Power Supply Unit
19
5.2 Intrinsically Safe RequirementsThese requirements relate to the interconnecting wiring made toand from Model 6540 203 and 6548 000 Katharometer AnalyzerPanels in the hazardous area and those for remote ancillaryitems connected to the system.
5.2.1 Cable RequirementsThe interconnecting cables between the various units of the gasanalysis system are subject to stringent limitations because ofthe requirements of the intrinsic safety certification. These arelisted below and detailed in Fig. 5.1.
All cables entering the hazardous area must be kept separatefrom cables in the safe area. Cables entering the hazardous areamust not be run with other cables and terminations must havean earthed screen to separate them from connections for othercircuits. The detailed requirements are as follows:
1) Connections between Model 006540 203 or 006548000 Katharometer Analyzer Panels and the 4234 PSU
All cables from the katharometer in the hazardous areamust have an inductance/resistance ratio not exceeding20μH/Ω (for Group IIC gases). Also the maximum loopresistance of this interconnecting cable is limited to 1.5Ω;This may place a limitation on the length of the total cablerun.
Twist single-sheathed conducting cables together toreduce their mutual inductance, route them separatelyfrom cabling for non-intrinsically safe circuits in the safearea.
2) Connections between Model 006540 203 or 006548000 Katharometer Analyzer Panels and Model 6553Display Unit
Katharometer to display unit cables carrying the outputsignals through zener barrier units inside the display unitare subject to a maximum inductance/resistance ratio of20μH/Ω (for group IIC gases). These wires are indicatedby a in Figs. 5.3 and 5.3a.
5.2.2 Recommended CablesThe choice of wiring cable is restricted by the limitationsimposed by the certification parameters. Care must be taken toensure that the specification of the cable required forinterconnection lengths is such that the certification parameterlimits are not exceeded – see Notes 2a, b and c in Fig. 5.1.
Cables manufactured to DEF STAN 61-12 Part 5 should comply,but care must be taken over the number or cores included in thecable; there is a significant difference between the 2-core and6-core cables. The diameter over the screen in the 6-core cableis greater than that of the 2-core and this diameter affects boththe inductance and capacitance values.
The values of a typical DEF STAN 61-12 Part 5 cable are:
2-core 6-coreInductance (μH/metre) 0.325 0.467Capacitance (pF/metre) 190 143L/R (μH/Ω) 8.6 11.4Test voltage 2kV AC for one minuteRated voltage 440V RMS
Typical cables may be obtained at the following addresses:
www.permanoid.co.ukwww.Belden.com
Note. Interconnection lengths and number of cores willdictate which cable is required e.g. Belden 9512 cable.
5.2.3 Installing Remote Ancillary ItemsAny indicator/controllers, or other electrical equipment,connected to TB1 of the Model 6553 Display Unit must not besupplied from, nor contain, a voltage source greater than 250VDC or 250V RMS with respect to earth.
5.2.4 Full Intrinsically Safe RequirementsFor systems to be modified or used with other gases the fullATEX requirements must be complied with as follows:
1) The total Capacitance and Inductance or Inductance toResistance ratio (L/R) of the cables connecting thekatharometer unit to the hazardous area terminals of thedisplay unit (TB2) and power supply unit terminals (TB1)must not exceed the values given in Fig. 5.1.
2) Any junction boxes used in the hazardous or safe areasmust conform to ATEX Directive 9/94/EC, specificallyclauses 6.1 and 6.3.1 of EN50020:1994.
When the AK100 gas analyzer system has been correctlyinstalled in accordance with the requirements for intrinsicsafety in Section 5.2, refer to Section 6 for system set up.
5 ELECTRICAL INSTALLATION
20
ElectricalInterconnections
Flow Gauge
Gas SampleOutlet
Local ZeroAdjustment
Drying Chamber
KatharometerUnit Case
MeteringValve
GasSample
Inlet
6.1 Katharometer Analyzer Panel –Filling the Drying Chamber – Fig. 6.11) Remove the drying chamber on the katharometer analyzer
panel by unscrewing the large knurled nut at the base of thechamber. Pull the chamber down and out of the sealinggroove to remove it from the panel.
Note. The desiccant used in the drying chamber iseither granular anhydrous calcium sulphate or calciumchloride and absorbs moisture from the atmosphere.The drying chamber has a capacity of 140ml approx.and requires approx. 100g of desiccant to fill it. Fillingand resealing must be carried as quickly as possible.
2) Open a container of fresh desiccant and fill the dryingchamber.
3) Replace the drying chamber in its sealing groove andreposition the chamber to enable it to be secured and sealedby hand tightening the knurled nut.
4) Carry out an approved leak testing procedure before passingsample gas through the system.
6.2 Setting Sample FlowWhen all tubing interconnections have been made and externalparts of the sample system checked for leaks, carry out thefollowing procedure:
1) Supply calibration quality purge gas* through the gasanalyzer system at the normal working pressure of theapplication plant and within the following limits:
Model 6540-203125mm H2O min. to 0.35bar (gauge) max.
Model 6548-000125mm H2O min. to 10bar (gauge) max.
Note. In some instances testing for leaks with purgegas* may not be considered an adequate check of gastight integrity in respect of the more penetratinghydrogen gas. Consideration should be given to theuse of a gas, such as helium, which has penetratingproperties nearer to that of hydrogen.
2) Slowly open the metering valve to give a nominal flowrate ofgas of 100 to 150ml min–1. Do not exceed the maximumflowrate 250ml/min.
3) Set the flowrate and shut off the calibration gas external tothe analyzer system.
4) Repeat this procedure for each katharometer analyzer panel,as required.
6 SETTING UP
Fig. 6.1 Location of Katharometer Analyzer Panel Components
*Note. Purge gas options include:CO2 (Carbon dioxide)N2 (Nitrogen)Ar (Argon)
21
6.3 Electrical ChecksCarry out the electrical checks detailed in Sections 6.3.1 and6.3.2.
6.3.1 Power Supply Unit Output
Warning. This unit is part of the certified intrinsicallysafe system. Appropriate safety precautions must betaken to prevent any incendive electrical discharges inthe hazardous area when carrying out this task.
Testing the output may only be carried out with thehazardous area cable disconnected.
1) Electrically isolate the PSU.
2) Remove the cover from the PSU.
3) Disconnect the output wires to the hazardous area atterminals TB2+ and TB2–.
Warning. Ensure that proper electrical safetyprecautions are taken at all times when undertaking thisprocedure.
4) Switch on the PSU and check that the output measures350mA into a 14Ω load.
5) On completion of tests isolate the unit and reconnect theoutput wires to the hazardous area.
6) Replace the cover on the unit.
6.3.2 Zener Diode Safety Barrier DevicesThe zener diode safety barrier devices (MTL7755ac orMTL7055ac) in the 6553 Display Unit are checked at the time ofmanufacture. To ensure absolute safety when fitting a newinstrument, check that the barriers in the display unit areproperly earthed by carrying out a routine test before using theanalyzer system.
Warning .
• This unit is part of the certified intrinsically safesystem. Appropriate safety precautions must betaken to prevent any incendive electrical dischargesin the hazardous area when carrying out this task.
• If these tests reveal a faulty zener barrier, the barrierMUST be replaced by a new unit. The barrier is asealed unit and no repair is permitted. The correctzener barriers are certified intrinsically safe andconform to the ATEX Directive 9/94/EC, certificatenumber BAS 01 ATEX 7217 (MTL 7755ac) orBAS 99 ATEX 7285 (MTL 7055ac).
• Replacement Zenner barriers MUST be of the sametype.
6.3.3 Checking System EarthCheck that the resistance between earth terminals on theanalyzer system and the application plant system safety earthdoes not exceed 1Ω.
6 SETTING UP
22
%H2 IN AIR
AlarmLEDs
UpperDisplay Line
LowerDisplay Line
Membrane Switches
A – Advancing to Next Page
Parameter 1Parameter 2Parameter 3Parameter 4
Page 1Parameter 1Parameter 2Parameter 3
Page 2
Advance tonext page
For majorityof parameters
or
B – Moving Between Parameters
C – Adjusting and Storing a Parameter Value
New value isautomatically stored
Parameter Value Adjust
D – Selecting and Storing a Parameter Choice
Parameter XYZ
Select
Parameter 1
Parameter 2Parameter 3
Page X
Parameter 4
Advance tonext parameter
or
New value isautomatically storedor
7.1 Displays – Fig. 7.1The displays mounted in the 6553 panel comprises a 5-digit, 7-segment digital upper display line and a 16-character dot-matrixlower display line. The upper display line shows actual values ofhydrogen purity, hydrogen in purge gas*, air in purge gas*, alarmset points or programmable parameters. The lower display lineshows the associated units or programming information.
7 CONTROLS & DISPLAYS
Fig. 7.1 Location of Contnrols and Displays
Fig. 7.2 Function of the Membrane Switches
7.2 Switch Familiarization – Figs. 7.1 and 7.2
*Note. Purge gas options include:CO2 (Carbon dioxide)N2 (Nitrogen)Ar (Argon)
23
Warning. When the apparatus is connected to itssupply, terminals may be live and the opening of coversor removal of parts (except those to which access maybe gained by hand) is likely to expose live parts.
8.1 Instrument Start-UpIn normal operation, the range selector switch is set toposition 1 and the instrument displays the Range 1 OperatingPage – see Section 9.2. This is a general use page in which thealarm set points may viewed but not altered. To change an alarmset point or program a parameter refer to Section 10. A 5-digitSecurity Code is used to prevent unauthorized access toprogrammable parameters. The value is preset at 00000 to allowaccess during commissioning but should be altered to a uniquevalue, known only to authorized operators, as described in theSetup Outputs Page – see Section 10.3.3.
When all the required wiring connections and electrical checkshave been made correctly, switch on the power supplies to thevarious units as follows:
1) Switch on the supply to the PSU.
2) Switch on the supply to the 6553 Display Unit.
3) If cubicle-mounted, switch on supply via the isolatorswitch, if fitted.
8.2 Alarm Set Point8.2.1 Type of Alarm ActionThe alarm relay coil is energized during normal non-alarm relaystates and is de-energized upon recognition of an alarmcondition, thereby providing 'fail-safe' alarms. For example, withAlarm 1 set point = 95.0%, when the display is indicating greaterthan 95.0% (plus hysteresis), Alarm Relay 1 is energized andAlarm 1 LED is OFF. When the display indicates less than 95.0%(minus hysteresis), Alarm Relay 1 is de-energized and Alarm 1LED is ON. This operating mode ensures that an alarm conditionis signalled in the event of a mains power failure. Repeat theprocedure for Alarm Relay 2 set point = 90.0%.
8.2.2 Hydrogen Alarm Set PointIt is recommended that the hydrogen alarm set-points are basedon a reducing percentage of hydrogen as it is displaced by airentering the application plant. This can be achieved by settingAlarm 1 and Alarm 2 to give ample warning of the developmentof a potentially explosive mixture. Factory settings are Alarm 1 =95.0% and Alarm 2 = 90.0%.
The procedure is as follows:
Access the programming pages (Section 10) and set the alarmset-points in accordance with the information in the Set UpOutputs Page. The hydrogen alarm set point can only be set withthe selector switch in position 1.
8.3 Electrical CalibrationThe instrument is factory calibrated for electrical voltage signalinput. No adjustment is normally necessary for correctfunctioning of the display unit. If electrical calibration is required,a voltage source capable of supplying 0.00 mV and 10.00 mV isneeded. Disconnect the katharometer input from the display unitand the voltage source signal applied according to theinstructions in the Electrical Calibration Page – see Section 10.
Note. The 4689 instruments incorporate a two-pointcalibration sequence requiring both zero and spaninputs for a calibration. It is not possible to adjust eitherthe range zero or the range span scale pointsindependently.
8.4 Gas Calibration8.4.1 IntroductionBefore putting the system on-line, it is recommended that acalibration check for the 'zero' reading is made using calibrationstandard sample gas.
The 'zero gas' is marked permanently on the data plate of thekatharometer unit. This gas, when passed through thekatharometer, gives a zero millivolt output. To provide a fail-safecondition for hydrogen purity, the zero gas is 85% hydrogen-in-nitrogen mixture. If power is lost to the katharometer, a hydrogenpurity alarm condition occurs on the display unit.
Full scale output from the katharometer is obtained by a 100%hydrogen gas sample and no adjustment of the katharometeroutput is normally required. The maximum signal for the full scalereading is sealed during manufacture and must not be altered byusers.
8.4.2 Purge GasWhen a purge gas katharometer forms part of the 6553 System,the startup procedure is as follows:
Notes.
1. The procedure outlined here is not normallynecessary as the ranges have been set at thefactory.
2. Test for leaks in accordance with the requirements ofthe responsible authority after making any gasconnections.
1) Pass suitable calibration quality gas through the purge gas*katharometer, on the appropriate katharometer analyzerpanel. The gas should be at the normal working pressure ofthe sample gas. This provides the correct flowrate of purge/sample gas as set previously.
8 START-UP
*Note. Purge gas options include:CO2 (Carbon dioxide)N2 (Nitrogen)Ar (Argon)
24
2) Power up the monitor unit, and the purge gas katharometerunit by switching on the appropriate power supply unit.
3) Set the range selector switch on the gas monitor unit toposition (3).
4) The upper display unit indicates NOT IN USE.
5) The lower display unit indicates the selected measurementparameter – percentage by volume of air in purge gas*(%AIR IN * ) – on its lower display line. The upper display lineindicates a value for the parameter.
6) With suitable calibration gas passing through the samplesystem at the normal flowrate, the upper line of the lowerdisplay unit should stabilize within 2 hours to read 0.0.
7) If necessary, refer to Section 10.3.3 for a full calibrationsequence.
Note. A remote zero adjustment facility is available atthe lower 'zero' potentiometer adjacent to the displayunit. Adjustment is made by inserting a screwdriverthrough the hole behind the small escutcheon plate.
8) Reset the range selector switch on the gas monitor toposition 2. The upper display continues to indicate NOT INUSE.
9) The lower display unit indicates the selected measurementparameter – percentage by volume of hydrogen in purgegas* (%H2 IN * ) – on the lower line. The upper line indicatesa value for the parameter.
10) With purge gas* continuing to pass through the samplesystem, the upper line of the lower display unit shouldstabilize within a few minutes to read 0.0.
11) If necessary, refer to Section 10.2.3 for a full calibrationsequence.
Note. No adjustment of the lower zero potentiometer isnecessary as any adjustment required will already havebeen made while calibrating the 'Air in purge gas*'range.
8.4.3 Hydrogen
Note. Test for leaks in accordance with therequirements of the responsible authority after makingany hydrogen connections.
1) Pass calibration quality hydrogen gas through the (H2)Katharometer Unit on the appropriate katharometer analyzerpanel, at the normal working pressure of the sample gassystem. This provides the correct flowrate of gas, as setpreviously.
2) Power up the monitor unit and the hydrogen katharometerunit by switching on the appropriate power supply unit.
3) If fitted, set the range selector switch on the monitor unit toposition (1).
4) The upper (hydrogen) display indicates the measurementparameter – percentage by volume of hydrogen in air (%H2IN AIR) – on the lower line. The upper display line indicates avalue for the parameter.
5) If fitted, the lower (purge gas) display unit indicates NOT INUSE.
6) With hydrogen calibration gas passing through the samplesystem at the normal flowrate, the upper display line of thetop display unit should stabilize within 2 hours to read 100.0.
7) If necessary, refer to Section 10.1.3 for a full calibrationsequence.
Note. Remote zero adjustment is available – see Fig.2.1. Adjustment is made by inserting a screwdriverthrough the hole behind the small cover plate.
…8 START-UP
*Note. Purge gas options include:CO2 (Carbon dioxide)N2 (Nitrogen)Ar (Argon)
25
9 OPERATION
9.1.2 Filling with Hydrogen Coolant GasThis procedure is a reversal of the purging procedure.
Initially, inert purge gas* is introduced into the application plantuntil the air content is safely below the explosive limit for air inhydrogen. When this limit is reached, hydrogen is graduallyintroduced into the system to displace the other two gases.
With respect to the operation of the gas analyzer system, theprocedure is as follows:
Warning. Suitable safety precautions apply to theoperation of the gas cooling and sample systems.
Note. For optimum accuracy it is recommended thatthe filling operation commences within 24 hours ofcarrying out the calibration procedure.
1) Select position (3) of the range selector switch on the displayunit. The displays and functions are shown in Table 9.1.
2) When the changeover to introduce hydrogen into theapplication plant is made, select position (2) of the rangeselector switch on the display unit. The displays andfunctions are shown in Table 9.1.
3) When the display indicates that hydrogen filling is complete,position the range selector switch at (1). The hydrogenmeasurement analyzer system is now on-line in monitoringmode – see Section 9.2.
rotceleSegnaRnoitisoPhctiwS
)ylno101KA(
eniLyalpsiDreppU eniLyalpsiDrewoL 1mralAtnioPteS
2mralAtnioPteSyalpsiDlautcA noitcnuF yalpsiDlautcA noitcnuF
reppUyalpsiD
)1( x.xxx eulaVelbairaV H% 2 riAni ytiruPnegordyH deriuqersA deriuqersA
)2( –––– tibihnI ESUNITON tibihnI tibihnI tibihnI
)3( –––– tibihnI ESUNITON tibihnI tibihnI tibihnI
rewoLyalpsiD101KA()ylno
)1( –––– tibihnI ESUNITON tibihnI tibihnI tibihnI
)2( x.xxx eulavelbairaV H% 2 *ni ytiruPsaGegruP deriuqersA elbaliavatoN
)3( x.xxx eulavelbairaV *niriA% ytiruPsaGegruP deriuqersA elbaliavatoN
401KAehtotelbacilppatoN
Table 9.1 Functions and Status of Display Units for Different Range Selector Switch Positions
9.1 NormalDuring normal operation the AK100 Gas Analyzer System isused to indicate the purity of hydrogen used as a coolant. Thedisplays shows the percentage of hydrogen in air, which shouldbe safely in excess of the explosive limit at the hydrogen richend.
There are no routine adjustments required to the gas analyzersystem after completion of start-up procedures and putting on-line in monitoring mode. The system requires only the carryingout of safety routines and minor adjustments to the meteringvalve to maintain the required flowrate.
A summary of the functions and status of the system for thedifferent range selector switch positions is shown in Table 9.1.
Note. Sections 9.1.1 and 9.1.2 only apply to theAK101.
9.1.1 Purging of Hydrogen Coolant GasInitially, inert purge gas* is introduced into the system. When thehydrogen concentration is safely below the explosive limit, air isintroduced into the system to completely displace the other twogases.
The AK100 Gas Analyzer System provides all the necessaryindications and output signals to enable this operation to becarried out safely.
In respect of the operation of the gas analyzer system(s), theprocedures are as follows:
Note. Suitable safety procedures apply to theoperation of gas cooling and sample systems.
1) Select position (2) of the range selector switch on the displayunit. The displays and functions are shown in Table 9.1.
2) Commence the purging operation.
3) When the changeover to introduce air into the applicationplant is made, select position (3) of the range selector switchon the display unit. The displays and functions are shown inTable 9.1.
*Note. Purge gas options include:CO2 (Carbon dioxide)N2 (Nitrogen)Ar (Argon)
26
Alarm 1 Setpoint
Alarm 2 Setpoint
Press to advanceto next parameter
Press to advanceto next page
SECURITY CODE
0 0 0 0 0
or
SECURITY CODE
SECURITY CODE
%H2 IN AIR
%H2 IN *
AIR IN *
Up
per
Dis
pla
yLo
wer
Dis
pla
y
SPT.2 H2 IN *
xxx.x
SPT.2 H2 IN *
xxx.x
9.2 Range 1 Operating PageRange 1 is selected for normal operations and the Operating Page indicates the purity of the hydrogen used as a coolant. The alarmset points can be viewed but not altered. To change the alarm set points or program other parameters refer to Section 10.
Hydrogen PurityShows the percentage of hydrogen in air.
These two keys are used to advance to all subsequent parameters and pages.
Alarm 1 Set PointThe set point value is programmmable – see Section 10.3, Set Up Outputs Page.
Alarm 2 Set PointThe set point value is programmmable – see Section 10.3, Set Up Outputs Page.
Advance to Access to Secure Parameters on page 28.
9.3 Range 2 Operating Page – AK101 onlySet to Range 2 the single Alarm Set Point value may be changed, this is displayed in the Operating Page.
9.4 Range 3 Operating Page – AK101 onlySet to Range 3 the single Alarm Set Point value may be changed, this is displayed in the Operating Page.
…9 OPERATION
*Note. Purge gas options include:CO2 (Carbon dioxide)N2 (Nitrogen)Ar (Argon)
27
UPPER DISPLAYRange 1
Operating Page
Upper Display
English
SECURITY CODE
SET UP OUTPUTS
Set Up Outputs PageElectrical
Calibration Page
Access toSecure Parameters
xxx.xLanguage Page
No Yes
Alter Sec. Code
Alarm 1 Setpoint
%H2 IN AIR
Adjust RTX Zero
Adjust RTX Span
Calibrate No
ELECTRICAL CAL
Secure Parameters
Note. All parameter values shown on the upperdisplay line are the default settings.
Alarm 2 Setpoint
RTX Type 4-20
0-20
0-10
100.0
75.0
50.0
25.0
0.0
EB
A1 Action EA
Yes
NOT IN USE
Lower Display
EB
A2 Action EA
A1 Setpoint
A2 Setpoint
Range 85% -100
mV Zero (0.00mV)
xxx.xxxx.x
mV Span (10.00mV)
xxx.x
Test Retrans (%)
Range 80% -100
Note.The following programming pages apply to both display units.
10 PROGRAMMING
Fig. 10.1 Overall Programming Chart for 6553 Display Unit (Range 1) – AK101 and AK104
28
**
** Only when 'Alarm H2 in CO2'selected in Set Up Outputs Page
LOWER DISPLAYRange 2
Operating Page
Lower Display
English
SECURITY CODE
SET UP OUTPUTS
Set Up Outputs PageElectrical
Calibration Page
Access toSecure Parameters
xxx.xLanguage Page
No Yes
Adjust RTX Zero
Adjust RTX Span
Calibrate No
ELECTRICAL CAL
Secure Parameters
Note. All parameter values shown on the upperdisplay line are the default settings.
RTX Type 4-20
0-20
0-10
AIR IN *
Alarm H2 IN *
Yes
NOT IN USE
Upper Display
EB
Relay Action EA
Alarm Setpoint
Test Retrans (%)
mV Zero (0.00mV)
xxx.xxxx.x
mV Span (10.00mV)
xxx.x
Alter Sec. Code
%H2 IN *
SPT. %H2 IN *
Note. Programming of the Language page, Set Up Outputs page and the Electrical Calibration page should be carried outwithin Range 2. If circumstances require, they can also be accessed from Range 3. It is not necessary to work through theSet Up Outputs page and the Electrical Calibration page in Range 3 once they have been set up in Range 2.
…10 PROGRAMMING
Fig. 10.2 Overall Programming Chart for 6553 Display Unit (Range 2) AK101 only
*Note. Purge gas options include:CO2 (Carbon dioxide)N2 (Nitrogen)Ar (Argon)
29
LOWER DISPLAYRange 3
Operating Page
Lower Display
English
SECURITY CODE
SET UP OUTPUTS
Set Up Outputs PageElectrical
Calibration Page
Access toSecure Parameters
Language Page
No Yes
Adjust RTX Zero
Adjust RTX Span
Calibrate No
ELECTRICAL CAL
Secure Parameters
Note. All parameter values shown on the upperdisplay line are the default settings.
RTX Type 4-20
0-20
0-10
AIR IN *
Alarm H2 IN *
Alarm Setpoint
Yes
NOT IN USE
Upper Display
EB
**
** Only when 'AIR IN *'selected in Set Up Outputs page
Relay Action EA
Test Retrans (%)
mV Zero (0.00mV)
xxx.xxxx.x
mV Span
Alter Sec. Code
%AIR IN *
SPT. AIR IN *
xxx.xxxx.x
see Note
Note.CO2 – 10.00mV.N2 – 1.00mV.Argon – 10.00mV.
10 PROGRAMMING…
Fig. 10.3 Overall Programming Chart for 6553 Display Unit (Range 3) – AK101 only
*Note. Purge gas options include:CO2 (Carbon dioxide)N2 (Nitrogen)Ar (Argon)
30
SECURITY CODE
English
SET UP OUTPUTS
A1 Action EA
EB
noitcAmralAnoitcADEL
tupnIroftnioPteSevobA
noitcADELtupnIrof
tnioPteSwoleB
noitcAyaleRtupnIrof
tnioPteSevobA
noitcAyaleRtupnIrof
tnioPteSwoleB
BE NO FFO dezigrene-eD dezigrenE
AE FFO NO dezigrenE dezigrene-eD
The set point band is defined as the actual value of the set point ± 1% of the set pointvalue. Alarm action occurs if the input value is above or below the set point band. If theinput moves within the set point band the last alarm action is maintained.
Continued on next page…
10.1 Range 1 (UPPER DISPLAY)
10.1.1 Access to Secure ParametersA 5-digit code is used to prevent unauthorized access to the secure parameters.
10.1.2 Language Page
Security CodeEnter the required code number, between 00000 and 19999, to gain access to thesecure parameters. If an incorrect value is entered, access to subsequent programmingpages is prevented and the display reverts to the Operating Page.
Note. The security code is preset at '00000' to allow access during commissioning butshould be altered to a unique value, known only to authorized operators – see AlterSecurity Code parameter in Set Up Outputs Page.
Advance to Language Page.
Language PageSelect the required language for the display.
Advance to Set Up Outputs Page.
10.1.3 Set Up Outputs Page
Alarm 1 ActionFor 'Fail-Safe' alarm operation the relay's alarm state must be the same as the power-down state, i.e. the relay is de-energized.
For high alarm operation the relay must be Energized Below the alarm set point (EB).
For low alarm operation the relay must be Energized Above the alarm set point (EA).
The alarm LEDs are illuminated in the alarm condition.
Select the required alarm action from the following table:
...10 PROGRAMMING
31
A1 Set Point
A2 Set Point
RTX Type 4-20
0-20
0-10
Alter Sec. Code
A2 Action EA
EB
Continued from previous page
Return totop of page
RTX Range 85%
Test Retrans (%)
100.0
75.0
50.0
25.0
0.0
Alarm 1 Set PointThe Alarm 1 Set Point can be set to any value within the input range being displayed. Theset point value is subject to hysteresis within the set point band as detailed above.Set the alarm set point to the required value.
Advance to next parameter
Alarm 2 ActionSee Alarm 1 Action.
Advance to next parameter
Alarm 2 Set PointSee Alarm 1 Set Point.The decimal point position is set automatically. The alarm LEDs are illuminated in thealarm condition.
Advance to next parameter
Retransmission Output TypeThe retransmission output is assigned to the hydrogen purity range.Select the retransmission output range required (4 to 20mA, 0 to 20mA or0 to 10mA).
Advance to next parameter
Test Retransmission OutputThe instrument transmits a test signal of 0, 25, 50, 75 or 100% of the retransmissionrange. The % test signal selected is shown on the upper line of the display.
Example – for the range 0 to 20mA and 50% retransmission test signal, 10mA istransmitted.
Advance to next parameter
Select the retransmission test signal required:Ranges 4689 500/501 100 to 85% and 100 to 80%
4689 500/503 85 to 100% and 80 to 100%
Advance to next parameter
Alter Security CodeSet the security code to a value between 00000 and 19999.This value will then have to be entered to regain access to the secure parameters.
Advance to Electrical Calibration Page.
…10.1.3 Set Up Outputs Page (UPPER DISPLAY)
10 PROGRAMMING...
32
ELECTRICAL CAL
Calibrate No
xxx.xmV Zero (0.00mV)
xxx.xmV Span (10.00mV)
Adjust RTX Zero
Adjust RTX Span
Yes No
Yes
Notes.1) The 4689 instruments incorporate a two-point calibration sequence requiring both
zero and span inputs for a calibration. It is not possible to adjust the range zero or therange span scale points independently.
2) The i
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