Removal/Replacement Of An Indicator Unit - ABB AK101 User Manual

o) Isolate the katharometer unit at its PSU.
p) Make the remaining electrical connections at TB1 of the
katharometer unit – see Fig. 5.5 on page 17.
q) Replace the cover of the katharometer unit.
r) Power up the katharometer unit from its PSU.
s) Carry out calibration procedure – see Section 8.3.
Note. It is possible that the zero reading may drift for
several days after the removal of liquid.

11.4.2 Removal/Replacement of an Indicator Unit

a) Electrically isolate the 6553 Display Unit.
b) Release the retaining screw through the display facia and
carefully withdraw the chassis from its edge connectors and
out through the front panel – see Fig. 3.1 on page 5.
c) To replace the unit, carefully insert it into the display facia and
press firmly into position before tightening the retaining
screw.
d) Power up the display unit and carry out a calibration – see
Section 8.3.
11.4.3 Error Messages
If the error message 'NV Memory Error' is displayed the contents
of the non-volatile memory has not been read correctly during
power up.
To rectify the fault, switch off, wait 10 seconds and switch on
again. If the fault persists, contact the Company.
11 MAINTENANCE
12 SPARE PARTS LIST
Warning. Interference with any unit or its components
implies acceptance of responsibility by that person for
ensuring the continuing maintenance of intrinsic safety
requirements. Unauthorized repair or spare parts or
incorrect assembly may render any unit unfit for use in
an intrinsically safe application.
Note. Although the digital display units may be marked
4600 on their display facia, they are dedicated variants
which are not interchangeable with the Company's
standard 4600 Controller/Display. These dedicated
display units are identified (4689 500 & 501 or 503) as
shown in Fig. 3.1 on page 5.
When ordering a katharometer unit, it is necessary to specify the
zero gas and range in association with the Company part
number. See the typical identification label shown in Fig. 3.2 on
page 5.
12.1 Consumables Description
12.2 Routine Maintenance Parts
Description
Model 6553 Display unit
Fuse, 500mA 250VAC rated F 20 x 5 mm ceramic
cartridge HBC (1500A) 250VAC
Function selector switch AK101
Potentiometer (1k ), zero adjustment
Katharometer
Analyzer Panel
Drying chamber refurbishment kit
Granular anhydrous CaCl2
12.3 Repair Maintenance Parts
Description
Model 4234 Power Supply Unit
Nominal 230V unit
Nominal 115V unit
Fuses
F2/F3 – T250mA/ 1500A 250VAC HBC ceramic
cartridge 20 x 5 mm
F1 – 400mA cartridge
Katharometer
Analyzer Panel
Drying chamber cylinder - Acrylic
Drying chamber cylinder - Stainless Steel
Drying chamber complete - Acrylic
Drying chamber complete - Stainless Steel
Flowmeter (Without flow alarms)
Flowmeter (With flow alarms)
Valve, metering
Coupling seal ring
Katharometer unit
Model 6553 Display unit
Description
Display units Hydrogen Purity 80/85% - 100% H2 in Air
Display units Hydrogen Purity 100% - 80/85% H2 in Air
Display units Carbon dioxide purge
Display units Nitrogen purge
Zener diode safety barrier devices MTL 7755ac
Low Flow Alarm (If Fitted)
Description
Zener diode safety barrier devices MTL 767+
Part No.
0231 601
006553 510
002569 036
Low pressure High pressure
006540 203 006548 000
006525 605 006548 007
006537 580 006537 580
Part No.
4234/50000
4234/50100
0231577
0231555
Low pressure High pressure
006540 203 006548 000
006525 710 006525 720
006548 111
006525 600 006548 003
006548 110
006525 440 0216 485
0216 557
006540 361 0216 484
006525 130
006539 960K (or J) 006548 001
Part No.
4689/503
4689/501
4689/500
4689/504
0248 296
Part No.
0248 298
45