ENMET ISA-44-2OD - Manual (Page 3)

Table of Contents
1.0 I NTRODUCTION ................................................................................................................................1
1.1 Unpack................................................................................................................................................................................ 1
1.2 Check Order....................................................................................................................................................................... 1
1.3 Serial Numbers .................................................................................................................................................................. 1
1.4 Read Manual ...................................................................................................................................................................... 1
2.0 F EATURES AND C ONTROLS OF THE ISA-44-2-OD ................................................................................2
2.1 Standard Calibration ......................................................................................................................................................... 2
2.2 External Features............................................................................................................................................................... 3
2.3 Internal Circuitry of the ISA-44-2-OD .......................................................................................................................... 4
3.0 I NSTALLATION ................................................................................................................................7
3.1 Power Hook-Up and Mounting of Control Unit ISA-44-2-OD................................................................................. 7
3.2 Sensor Location................................................................................................................................................................. 8
3.3 Sensor Hook-up ................................................................................................................................................................. 9
3.4 Sensor Heater Voltage.................................................................................................................................................... 11
3.5 Oxygen Cell Adjustment................................................................................................................................................ 11
4.0 O PERATION .................................................................................................................................. 12
4.1 Warm-Up .......................................................................................................................................................................... 12
4.2 Operation Condition ....................................................................................................................................................... 12
4.3.1 Precautions...........................................................................................................................................................12
4.4 Rough Test....................................................................................................................................................................... 13
5.0 M AINTENANCE .............................................................................................................................. 14
5.1 Routine Gas Test............................................................................................................................................................. 14
5.2 Calibration........................................................................................................................................................................ 16
5.2.1 Toxic Gas Channel # 1 .......................................................................................................................................16
5.2.2 Oxygen Channel # 2 ............................................................................................................................................18
5.2.3 Combustible Gas Channel # 3 ...........................................................................................................................19
5.3 Replacement of Sensors................................................................................................................................................. 20
Gas Sensors.....................................................................................................................................................................20
Oxygen Cell ....................................................................................................................................................................20
5.4 Trouble Shooting............................................................................................................................................................. 21
6.0 R EPLACEMENT P ART N UMBERS ...................................................................................................... 22
7.0 S PECIFICATIONS ........................................................................................................................... 22
8.0 WARRANTY............................................................................................................................... 23
List of Figures and Tables
F IGURE 1: E XTERNAL F EATURES OF THE ISA-44-2-OD..............................................................................3
F IGURE 2: I NTERNAL C IRCUITRY F EATURES OF THE ISA-44-2-OD ...............................................................4
F IGURE 3: C IRCUITRY PC1 C HANNELS 1 AND 2 ........................................................................................5
F IGURE 4: C IRCUITRY PCB 3 C HANNEL 3 ................................................................................................6
F IGURE 5: M OUNTING D IMENSIONS ISA-44-2-OD .....................................................................................7
T ABLE 1: H EAVIER THAN A IR ..................................................................................................................8
T ABLE 2: L IGHTER THAN A IR ..................................................................................................................8
T ABLE 3: S AME D ENSITY AS A IR .............................................................................................................8
F IGURE 6: O XYGEN C ELL E NCLOSURE .....................................................................................................8
F IGURE 7: I NTERNAL V IEW OF S ENSOR W IRING .........................................................................................9
T ABLE 4: R ECOMMENDED W IRE G AUGE ...................................................................................................9
T ABLE 5: R ELAY F UNCTION ................................................................................................................. 10
F IGURE 8: S UGGESTED R ELAY H OOK -U P C ONFIGURATION ....................................................................... 10
F IGURE 9: E XPOSING A S ENSOR TO T EST OR C ALIBRATION G AS ............................................................... 14
T ABLE 7: A PPROXIMATE A LARM T IME ................................................................................................... 15
Reference information:
N
OTE : [important information about use of instrument – if not followed may have to redo some steps.]
C AUTION : [affects equipment – if not followed may cause damage to instrument, sensor etc…]
W ARNING : [affects personnel safety – if not followed may cause bodily injury or death.]