Hazardous AreaZirconia Oxygen Systems
Interface Electronics Unit
Installation GuideIM/EXFG–INT_6
ABB
The Company
We are an established world force in the design and manufacture of instrumentation for industrialprocess control, flow measurement, gas and liquid analysis and environmental applications.
As a part of ABB, a world leader in process automation technology, we offer customersapplication expertise, service and support worldwide.
We are committed to teamwork, high quality manufacturing, advanced technology and unrivalledservice and support.
The quality, accuracy and performance of the Company’s products result from over 100 yearsexperience, combined with a continuous program of innovative design and development toincorporate the latest technology.
The UKAS Calibration Laboratory No. 0255 is just one of the ten flow calibration plants operatedby the Company, and is indicative of our dedication to quality and accuracy.
Electrical Safety
This equipment complies with the requirements of CEI/IEC 61010-1:2001-2 'Safety Requirements for Electrical Equipment forMeasurement, Control and Laboratory Use'. If the equipment is used in a manner NOT specified by the Company, the protectionprovided by the equipment may be impaired.
Symbols
One or more of the following symbols may appear on the equipment labelling:
Health and SafetyTo 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 theinformation 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 proceduresmust 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 beobtained from the Company address on the back cover, together with servicing and spares information.
Warning – Refer to the manual for instructions
Caution – Risk of electric shock
Protective earth (ground) terminal
Earth (ground) terminal
Direct current supply only
Alternating current supply only
Both direct and alternating current supply
The equipment is protectedthrough double insulation
Information in this manual is intended only to assist our customers in the efficient operation of our equipment. Use of this manual forany other purpose is specifically prohibited and its contents are not to be reproduced in full or part without prior approval of theTechnical Publications Department.
EN ISO 9001:2000
Cert. No. Q05907
EN 29001 (ISO 9001)
Lenno, Italy – Cert. No. 9/90A
0255
Stonehouse, U.K.
1
PROBE������� Part No.
IM/EXFG–PB
SPECIFICATION SHEETFull Specification�
Part No.SS/EXFG
Certification
Product Identification
Mechanical Installation
Electrical Connections
Operation
Calibration
Fault Finding
TRANSMITTERProduct Identification
Mechanical Installation
Electrical Connections
Controls & Displays
Operation
Programming
������
Part No.IM/EXFG–4600
INTERFACE UNITCertification
Product Identification
Mechanical Installation
Electrical Installation
System Calibration
Fault Finding
������
Part No.IM/EXFG–INT
and
4680
4685
CONTENTS 1 INTRODUCTION
1.1 Documentation – Fig. 1.1Documentation for the EXFG Oxygen Analyzer System is shownin Fig. 1.1.
1.2 CertificationThe EXFG Interface Electronics Unit is certified to the ATEXDirective and CENELEC Standards BS EN50014 and BSEN50018 flameproof II 2G EExd IIB T6 (Tamb –20ºC to +50ºC).Baseefa03ATEX0385.
Certificates are available for inspection and/or copies can beobtained on application to the Company.
Fig. 1.1 System Documentation
Section Page
1 INTRODUCTION ........................................................... 11.1 Documentation ................................................... 11.2 Certification ........................................................ 11.3 System Overview................................................ 2
2 PREPARATION ............................................................. 32.1 Checking the Code Number ............................... 3
3 MECHANICAL INSTALLATION .................................... 43.1 Siting Requirements ........................................... 43.2 Mounting ............................................................ 5
4 ELECTRICAL INSTALLATION ...................................... 64.1 Conduit/Cable and Gland Specifications ............ 6
4.1.1 EXFG Interface Electronics Unitto EXFG Probe ...................................... 6
4.1.2 EXFG Interface Electronics Unitto EXFG 4600 Transmitter Unit ............. 7
4.2 Access to Terminals ........................................... 74.3 Conduit and Cable Connections ........................ 8
4.3.1 Single Conduit Connections ................. 84.3.2 Dual Conduit Connections .................... 94.3.3 Dual Cable Connections ..................... 10
4.4 Selecting the Mains Voltage ............................. 114.5 Re-sealing the Cover after Connection ............. 124.6 Switching Power On ......................................... 12
5 SYSTEM CALIBRATION ............................................. 135.1 Tools Required ................................................. 135.2 Access to the Zero and Span Controls ............ 13
6 FAULT FINDING.......................................................... 16
2
NON HAZARDOUS AREAHAZARDOUS AREA(ATEX Zone 1, Gas Group IIB)
Process20C to600C1.1 Bar
AbsoluteMaximum(40in WG)
EXFG ProbeATEX/CENELEC flameproofII 2G EEx d IIB T3 (Tamb –20C to +55C)BS EN50014 and BS EN50018
Mains Supply
Control ThermocoupleSignal
4 to 20mA Output Signal(25% to 0.25% O2)
or
4680 Transmitter
Mains Supply
Interface Electronics UnitATEX/CENELEC flameproof II 2G EEx d IIB T6
(Tamb –20C to +50C) BS EN50014 and BS EN50018
Flue
4685 Transmitter
RetransmissionOutput
Reference Air Line Entry
O2 mV Signal(–20 to +180mV)
or
LogicAlarmSignal
1.1 BarAbsolute Maximum
Dry, Oil-freeInstrument Air(10 bar max.)
ControlledHeaterSupply
Over-temperatureTrip Thermocouple
Test GasInlet
RegulatedReference Air Unit
(003000241)
…1 INTRODUCTION
1.3 System Overview – Fig. 1.2The EXFG Interface Electronics Unit is an explosion-proof, wall mounted device designed specifically for use with EXFG OxygenProbes.
It can be sited in an area in which explosive atmospheres are present in quantities that require special precautions for the constructionand use of electrical apparatus.
The unit provides temperature control for the EXFG probe heater and incorporates a fail-safe over-temperature trip. It also convertsmillivolt signals received from the EXFG probe zirconia cell (25% to 0.25% O2)
into a 4 to 20mA output signal for retransmission to a4680 or 4685 Series Transmitter. In addition, the unit is fitted with over-temperature and under-temperature alarm contacts whichrelate to fault conditions.
Span/zero calibration controls located at the side of the casting can be accessed and adjusted without infringing the flameproofintegrity of the unit.
Fig. 1.2 System Schematic
3
DO NOT OPEN WHEN ENERGISEDOR WHEN AN EXPLOSIVE GAS
ATMOSPHERE IS PRESENT
See Table 2.1 for unit code number
EXFG/0 0 0 X X X
tinUscinortcelEecafretnIGFXE 000/GFXE X X X
scinortcelEecafretnI enoNeborPGFXEroF
01
ylppuSsniaM enoNzH06/05V032zH06/05V511
012
smralA enoN)rettimsnarT0064tuohtiwdesufi(0064enoN
)cigoL(0064
012
2 PREPARATION2 PREPARATION
2.1 Checking the Code Number – Fig. 2.1
Fig. 2.1 Checking the Code Number
Table. 2.1 Code Number Interpretation
4
C – Within Environmental LimitsB – Within Temperature Limits
A – Maximum Distance of EXFG Interface Electronics Unit to EXFG Probe
50CMax.
–20CMin.ATMOSPHERE IS PRESENTDO NOT OPEN WHEN FLAMMABLE
IP66ATMOSPHERE IS PRESENT
DO NOT OPEN WHEN FLAMMABLE (NEMA 4X)
Maximum distance19.69 to 32.81ft (6 to 10m)with single or dual conduit
Up to 328.1ft (100m) with special dual cables ATMOSPHERE IS PRESENT
DO NOT OPEN WHEN FLAMMABLE
3 MECHANICAL INSTALLATION
Caution. 50C is the certified maximum ambient temperature.
Fig. 3.1 Siting Requirements
3.1 Siting Requirements – Fig. 3.1
Caution. When siting the EXFG Interface Electronics Unit choose a location free from excessive vibration.
5
DO NOT OPEN WHEN ENERGISEDOR WHEN AN EXPLOSIVE GAS ATMOSPHERE IS PRESENT
Drill suitable holes
Fix instrument to wall usingsuitable fixings (1/2in. or M12)
Mark fixing centers(see Fig. 3.2)
3
2
1
16.14 (410)
14.37(365)
6.02(153)
6.69(170)
14.96 (380)
DO NOT OPEN WHEN ENERGISEDOR WHEN AN EXPLOSIVE GAS
ATMOSPHERE IS PRESENT
2.56(65)
2.19(55.5)
11.81 (300)Min. Distance
2.56(65)
2.19(55.5)
(for door clearance)
Dimensions in inches (mm)
3 MECHANICAL INSTALLATION
3.2 Mounting – Figs. 3.2 and 3.3
Warning. Installation and repair must be carried out only by the manufacturer, authorized agents or persons conversant withthe construction standards for hazardous area certified equipment.
Fig. 3.2 Overall Dimensions
Fig. 3.3 Mounting
Note. Mount the unit at a level which allows easyaccess for connection and disconnection.
6
4 ELECTRICAL INSTALLATION
Warning. Before making any connections, ensure that the power supply, any high voltage-operated control circuits and highcommon mode voltages are switched off.
4.1 Conduit/Cable and Gland Specifications
4.1.1 EXFG Interface Electronics Unit to EXFG ProbeRefer to Table 4.1 for conduit, special cable and gland specifications.
Caution.• Installation and repair must be carried out only by the manufacturer, authorized agents or persons conversant with the
construction standards for hazardous area certified equipment. The specifications detailed in Table 4.1 are for systemelectrical requirements only.
• All cables must be suitable for flameproof 'd' type enclosures for mechanical construction.
• EEx d glands used on the Interface Electronics Unit must be of the EEx d 'Barrier Gland' type (because the enclosure isover 2 litres volume).
Table 4.1 Conduit/Cable and Gland Specifications – EXFG Interface Electronics Unit to EXFG Probe
rewopdnalangisdenibmoc–tiudnoCelgniS
htgnel)m6(tf86.91 dnehcaesdnalgreirrabdxEEdeifitrecfoorpemalf52Mhtiwdettifylbmessatiudnocrewop/langiS)0600/GFXE.ontrap(
ro
htgnel)m01(tf18.23 dnehcaesdnalgreirrabdxEEdeifitrecfoorpemalf52Mhtiwdettifylbmessatiudnocrewop/langiS)1600/GFXE.ontrap(
rewopdnalangisetarapes–tiudnoClauD
htgnel)m6(tf86.91dnehcaesdnalgreirrabdxEEdeifitrecfoorpemalf52MhtiwdettifylbmessatiudnoclangiS
)2600/GFXE.ontrap(
dna
dnehcaesdnalgreirrabdxEEdeifitrecfoorpemalf02Mhtiwdettifylbmessatiudnocrewop)3600/GFXE.ontrap(
ro
htgnel)m01(tf18.23dnehcaesdnalgreirrabdxEEdeifitrecfoorpemalf52MhtiwdettifylbmessatiudnoclangiS
)4600/GFXE.ontrap(
dna
dnehcaesdnalgreirrabdxEEdeifitrecfoorpemalf02Mhtiwdettifylbmessatiudnocrewop)5600/GFXE.ontrap(
rewopdnalangisetarapes–elbaClauD
redroothtgneL))m001(tf1.823htgnelmumixam(
deifitrecfoorpemalf52Mhtiwdeilppus)4910/GFXE.ontrap(deruomraeriw-leets,elbaclangislaicepS)47211B.ontrap(dnehcaerofsdnalgreirrabdxEE
dna
02Mhtiwdeilppus)5910/GFXE.ontrap(eroc-3,deneercsdnaderuomraeriw-leets,elbacrewoplaiceps)57211B.ontrap(dnehcaerofsdnalgreirrabdxEEdeifitrecfoorpemalf
Single Conduit, Dual Conduit or Special Dual Cables(refer to EXFG Probe Guide for options)
7
3
DO NOT OPEN WHEN ENERGISED
OR WHEN AN EXPLOSIVE GAS
ATMOSPHERE IS PRESENT
Open casing
1 2
DO NOT OPEN WHEN ENERGISEDOR WHEN AN EXPLOSIVE GASATMOSPHERE IS PRESENT
Insert bolt from underside offlange and screw in to breakthe seal between the lid and the base
Remove flange bolts (16)
4 ELECTRICAL INSTALLATION…
…4.1 Conduit/Cable and Gland Specifications
4.1.2 EXFG Interface Electronics Unit to EXFG 4600 Transmitter UnitRefer to Table 4.2 for cable and gland specifications.
4.2 Access to Terminals – Fig. 4.1
Table 4.2 Cable and Gland Specifications – EXFG Interface Electronics Unit to EXFG 4600 Transmitter
Warning. The flange faces are flameproof paths and must be free from damage. If faces are damaged in any way theEXFG Interface Electronics Unit must be returned to the manufacturer for replacement.
Fig. 4.1 Access to Terminals
noitacificepSdnalG snoitacificepSelbaC noitacificepSdnalG
deifitrecfoorpemalf02MdnalgreirrabdxEE
)deilppuston(
elbaclangiS)deilppuston(
,deneercsllarevo,reppoceroc-4,2.0/61)sriapowt(foorpemalf
057ecnatsiserpool.xaM
0864deifitrecnU02M
)dettif(
5864dnalgoN
deriuqer
deifitrecfoorpemalf02MdnalgreirrabdxEE
)deilppuston(
elbacrewopsniaM)deilppuston(
mm5.0,eroc-3 2 ).nim(reppoc 0864deifitrecnU02M
)dettif(
5864dnalgoN
deriuqer
4685
4680
or
Mains power cable
Signal Cable
8
Single Conduit Entry (M25)Power/Signal
Mains Power Entry (M20)Not Used(blankedduringmanufacture)
Temperature Alarm Output (M20)and
O2, 4 to 20mA Retransmission (M20)
TB6
TB7
TB8
TB9
N/C
CO
M
N/O
N/C
CO
M
N/O
TB4
TB5
TB3
TB2
TB1
+ – + – + – + – + – L N EH H ESCR
To 'SCR'(if screen
is present)
BROW
N
RED BLUE
BLUE
GREE
N/YE
LLOW
TRIP –VE
CONT –VE
CONT –VE
MAINSUNDER TEMPALARM
OVER TEMPALARM
HEATERSUPPLY
CELLO/P mV
PROBECONTROL T/C
OVER TEMPTRIP T/C
RTX mALOGICTEMP ALARM
Single Conduitto Probe
(M25)
Earth Stud
TB1TB2TB3TB4TB5TB6TB7TB8TB9Earth Stud
3-core 0.5mm2 cable4-core cable
If this entry is notused it must beblanked using aflameproof certifiedEEx d M20 blanking plug
Non-4600 Version
TRIP +VE
WHITE
WHITE
BLUE
BLUE
4600 Version
…4 ELECTRICAL INSTALLATION
4.3 Conduit and Cable Connections
4.3.1 Single Conduit Connections – Fig. 4.2
Fig. 4.2 Single Conduit Connections
9
Earth Stud
TB1TB2TB3TB4TB5TB6TB7TB8TB9Earth Stud
Dual ConduitSignal Entry
(M25)
Temperature Alarm Output (M20)and
O2, 4 to 20mA Retransmission (M20)
Dual ConduitPower Entry
(M20)
Mains Power Entry (M20)If this entry is notused it must beblanked using aflameproof certifiedEEx d M20blanking plug
TB6
TB7
TB8
TB9
N/C
CO
M
N/O
N/C
CO
M
N/O
TB4
TB5
TB3
TB2
TB1
+ – + – + – + – + – L N EH H ESCR
RED
BLUE
MAINSUNDER TEMPALARM
OVER TEMPALARM
HEATERSUPPLY
CELLO/P mV
PROBECONTROL T/C
OVER TEMPTRIP T/C
RTX mALOGICTEMP ALARM
Signal Conduitto Probe
(M25)
Power Conduitto Probe
(M20)
BR
OW
N
BLU
E
GR
EE
N/
YE
LLO
W
3-core 0.5mm2 cable4-core cable
To 'SCR'(if screen
is present)
TRIP –VE
CONT –VE
CONT –VE
TRIP +VE
WHITE
WHITE
BLUE
BLUE
Non-4600 Version4600 Version
4 ELECTRICAL INSTALLATION…
…4.3 Conduit and Cable Connections
4.3.2 Dual Conduit Connections – Fig. 4.3
Fig. 4.3 Dual Conduit Connections
10
Earth Stud
TB1TB2TB3TB4TB5TB6TB7TB8TB9Earth Stud
TB6
TB7
TB8
TB9
N/C
CO
M
N/ON/C
CO
M
N/O
TB4
TB5
TB3
TB2
TB1
L N E
MAINSUNDER TEMPALARM
OVER TEMPALARM
HEATERSUPPLY
CELLO/P mV
PROBECONTROL T/C
OVER TEMPTRIP T/C
RTX mALOGICTEMP ALARM
Signal Cableto Probe
(M25)Power Cable
to Probe(M20)
3-core 0.5mm2 cable4-core cable
–SCR+ – + – + – + – + – H H E
Special SWASignal
Cable Entry forM20 Barrier
Gland with M25Reducer
SEE WARNING
TemperatureAlarmOutput (M20)
andO2, 4 to 20mA
Retransmission (M20)Special SWA
PowerCable Entry for
M20 BarrierGland
SEE WARNING
Mains Power Entry (M20)If this entry is notused it must beblanked using aflameproof certifiedEEx d M20blanking plug
Non-4600 Version4600 Version
To 'SCR'(if screen ispresent)
13 2 13 2
Signal cables are identified by cable number– see EXFG Probe Guide, Section 4.2.4
Green/Yellow
BrownBlueBlack
RedBlue
White
…4 ELECTRICAL INSTALLATION
…4.3 Conduit and Cable Connections
4.3.3 Dual Cable Connections – Fig. 4.4
Warning. When fitting barrier glands,the manufacturers instructions mustbe followed. Screens on cables mustbe isolated from the gland metalworkand chassis earth.
Fig. 4.4 Dual Cable Connections
11
115
Code Label
EXFG/0 0 0 X X X
Power Supply not Fitted0
230V1
115V2115
115
230 230
115
Heater Fuse(2.5A)
SEE WARNING
SEE WARNING
4 ELECTRICAL INSTALLATION…
4.4 Selecting the Mains Voltage – Fig. 4.5
Warning. Ensure bothmains voltage switchesare set to the samevoltage before power isapplied to the EXFGInterface ElectronicsUnit – see Section 4.6.
Fig. 4.5 Selecting the Mains Voltage
12
POWER HEATERO/TU/T
DO NOT OPEN WHEN ENERGISEDOR WHEN AN EXPLOSIVE GASATMOSPHERE IS PRESENT
DO NOT OPEN WHEN ENERGISED
OR WHEN AN EXPLOSIVE GAS
ATMOSPHERE IS PRESENT
Apply sufficient grease(part no. CG5317) toflange to form aweatherproof seal
Remove bolt fromrear of casing
Ensure grease is visible aroundentire flange, then remove excessgrease and use a feeler gauge toensure the gap between the lid andthe base is less than 0.15mm
Close casing
Insert and tighten flange boltsto approximately 10Nm
1
3
5
4
2
…4 ELECTRICAL INSTALLATION
4.5 Re-sealing the Cover after Connection – Fig. 4.6
Warning. Ensure all electrical connections have been made correctly before re-sealing and securing the cover. Do notswitch on mains power until the cover has been re-sealed and secured with all 16 (SS Grade A2–70) cover bolts tightenedevenly to approx. 10Nm. There should be no visible gap in the joint between lid and base. If in doubt check that a 0.2mmfeeler gauge does not fit into the gap at any point.
After switching power on, allow the probe to operate for aminimum of 1 hour to reach the correct operating temperature.
In normal operation, the power LED illuminates withinapproximately 15 minutes of switching on (according to the localtemperature at the probe heater) and the heater LED flashesevenly.
Fig. 4.6 Securing the Cover
Fig. 4.7 LED Indication of Operating Temperature
4.6 Switching Power On – Fig. 4.7
Information.• Ensure the Probe has been installed and connected correctly – see Sections 3 and 4 of the EXFG Probe Guide.
• If a 4680 or 4685 Transmitter is used, ensure that it has been installed and connected correctly as detailed inSections 3and 4 of the EXFG Transmitter Guide. Before switching the transmitter on, refer to Section 5 for Controls and Displaysand Section 6 for Operation (Instrument Start-up).
• The EXFG Interface Electronics Unit has no independent ON/OFF switch and must be powered-up from the mains switch.
13
Remove cover plate
Remove uppercover plate screw
Slacken lower cover plate screw 1
2
3
Reset Button
Zero Adjustment Screw
Span Adjustment Screw
5 SYSTEM CALIBRATION
Fig. 5.1 Access to the Zero and Span Controls
It is recommended that an air-based calibration is carried out when commissioning the system. An additional span calibrationprovides the ultimate system accuracy, but is only necessary if span errors are suspected. The EXFG system can be calibratedin situ by applying test gasses to the test gas inlet on the EXFG Probe and adjusting the reading on the EXFG InterfaceElectronics Unit display to give the correct ouput.
Note. It is not necessary to open the flameproof enclosure on either the EXFG Probe or the EXFG Interface electronics Unitto calibrate the system.
To calibrate the EXFG system carry out the following procedures:a) Switch power on and allow the probe to operate for a minimum of 1 hour to stabilize – see Fig.4.7.b) Remove the cover plate to allow access to the Zero and Span controls – see Fig. 5.1.c) Carry out an air based calibration as described in Fig. 5.2.d) If necessary, carry out a span gas calibration as described in Fig. 5.3.e) Refit the cover plate over the Zero and Span controls – see Fig. 5.1.f) Refit the test gas blanking plug – see Fig. 5.2. The test gas blanking plug must be a gas tight fit to prevent incorrect probe readings.
5.1 Tools RequiredMedium crosshead screwdriverM4 Allen keyZero (air) and span test gases (3000cc/min flow rate)
5.2 Access to the Zero and Span Controls – Fig. 5.1
14
+ -Adjust the Zero Screw… …until the correct value is displayed
Remove the dust cap, attach the test gaspipe and apply air at 3000cc/min for 10minutes or remove the probe from the ductand allow it to stabilize in normal atmosphere
1
2
POWER HEATERO/TU/T
4.61
+ - xx.xx
Attach the test gas pipe and apply spangas within the range 0.25% to 5% 02 inN2 at 3000cc/min. for 10 minutes
Adjust the Span Screw… …until the correct value is displayed– refer to Fig. 5.4 to obtain the correctvalue of output v. test gas O2%
1
2
…5 SYSTEM CALIBRATION
Fig. 5.2 Zero Calibration
Fig. 5.3 Span Calibration
15
FormulamA out = [8(1.397940009 – log(O2%))] + 4
Dis
pla
yed
Val
ue (m
A)
Oxygen (Volume) %
0.5 1 2 5 10 20 25
4
6
8
10
12
14
16
18
20
0.25
5 SYSTEM CALIBRATION
Fig. 5.4 Displayed Value (mA) v. Percentage Oxygen
16
6 FAULT FINDING
Fig. 6.1 Fault Finding Chart
CONDITION ACTION
a) Normal operation(approximately
N/A
15 minutes after power up).
a) Over temperature trip hasoperated.
Check trip thermocouple for open circuit and controlthermocouple wiring for short circuit or reversed connections.
When fault has been rectified, press and release RESET button– see Fig. 5.1.
a) Cell under temperature. If heater l.e.d. is lit continuously (not flashing) 15 minutes afterswitching on, check for faults c), d) and e).
b) Probe heater stil l warming up. If heater l.e.d. is lit continuously (not flashing) 15 minutes afterswitching on, check for faults c), d) and e).
c) Heater open circuit. Replace heater assembly – see Section 8.5*.
d) Thermocouple leads shorted orreversed.
Check thermocouple wiring – see Section 7.1.1*.
e) Heater loop resistance too high. Check the heater extension lead resistance by removing theheater wires at the H H terminals and measuring the resistanceacross the wires which should be between 22 and 28 – seeSection 4.3.
a) Control thermocouple opencircuit if l.e.d fails to flash after15 minutes of power on.
Check control thermocouple for open circuit – seeSection 7.1.1*.
a) No power to heater. Check probe control thermocouple for open circuit– see Section 7.1.1*.
Check fuse in heater circuit – see Fig. 4.5.
Check wiring (open circuit).
Check heater loop resistance – see step e) above.
a) No power to InterfaceElectronics Unit.
Check mains power supply.
b) Failure of internal power supply. Check operation of Interface Electronics Unit power supply.*Refer to the EXFG Probe Guide for section references.
LED INDICATION
POWER HEATERO/TU/T
POWER HEATERO/TU/T
4 – 20mADisplay
DO NOT OPEN WHEN ENERGISEDOR WHEN AN EXPLOSIVE GASATMOSPHERE IS PRESENT
POWER HEATERO/TU/T
POWER HEATERO/TU/T
POWER HEATERO/TU/T
POWER HEATERO/TU/T
POWER HEATERO/TU/T
LED OFF LED ON
Key to LED Indication
LED FLASHING(EVENLY)
Warning. Never open the EXFG Interface ElectronicsUnit in the presence of a flammable atmosphere.
PRODUCTS & CUSTOMER SUPPORT
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Customer Support
We provide a comprehensive after sales service via a WorldwideService Organization. Contact one of the following offices fordetails on your nearest Service and Repair Centre.
United KingdomABB LimitedTel: +44 (0)1453 826661Fax: +44 (0)1453 829671
United States of AmericaABB Inc.Tel: +1 (0) 775 850 4800Fax: +1 (0) 775 850 4808
Client Warranty
Prior to installation, the equipment referred to in this manual mustbe stored in a clean, dry environment, in accordance with theCompany's published specification.
Periodic checks must be made on the equipment's condition. Inthe event of a failure under warranty, the following documentationmust be provided as substantiation:
1. A listing evidencing process operation and alarm logs at time offailure.
2. Copies of all storage, installation, operating and maintenancerecords relating to the alleged faulty unit.
IM/E
XFG
–IN
TIs
sue
6
The Company’s policy is one of continuous productimprovement and the right is reserved to modify the
information contained herein without notice.
Printed in UK (07.05)
© ABB 2005
ABB LimitedOldends Lane, StonehouseGloucestershire, GL10 3TAUK
Tel: +44 (0)1453 826661Fax: +44 (0)1453 829671
ABB Inc.Analytical Instruments9716 S. Virginia St., Ste. EReno, Nevada 89521USATel: +1 (0) 775 850 4800Fax: +1 (0) 775 850 4808
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1 INTRODUCTION 1.1 Documentation 1.2 Certification 1.3 System Overview
2 PREPARATION 2.1 Checking the Code Number
3 MECHANICAL INSTALLATION 3.1 Siting Requirements 3.2 Mounting
4 ELECTRICAL INSTALLATION 4.1 Conduit/Cable and Gland Specifications 4.1.1 EXFG Interface Electronics Unit to EXFG Probe 4.1.2 EXFG Interface Electronics Unit to EXFG 4600 Transmitter Unit
4.2 Access to Terminals 4.3 Conduit and Cable Connections 4.3.1 Single Conduit Connections 4.3.2 Dual Conduit Connections 4.3.3 Dual Cable Connections
4.4 Selecting the Mains Voltage 4.5 Re-sealing the Cover after Connection 4.6 Switching Power On
5 SYSTEM CALIBRATION 5.1 Tools Required 5.2 Access to the Zero and Span Controls
6 FAULT FINDING