Sample Gas Interconnections - ABB AK101 User Manual

...4 MECHANICAL INSTALLATION
Power Supply
Unit 1
Low Flow Alarm
Zener Barriers
1 and 2
(if iftted)
(B4 and B5)
Terminal Block
Intrinsically
Safe Earth

4.2 Sample Gas Interconnections

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 reach
ambient temperature before entry to the katharometer unit.
If there is a risk of significant particle contamination incorporate a suitable 1 m filter unit in the system before the sample gas enters
the Analyzer system.
Compression couplings are supplied at the sample inlet and outlet to the katharometer panel. These couplings are suitable for
connecting 8mm (0.31 in.) (Model 006540 203) or 6mm (0.24 in.) (Model 006548 000) outside diameter metal tube. It is
recommended that stainless steel tube is used.
The complete tubing system should be tested for leaks in accordance with the requirements of the responsible authority.
12
Earth Point (Ground)
(NOT intrinsically safe earth)
To Cubicle Earth
(NOT intrinsically safe earth)
1 2 1 2
1 2
B6
POWER SUPPLY
UNIT No. 1
3 4 3 4
No. 1 No. 2
B4 B5
BARRIER FLOW
ALARM
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
PSU 1 TO PSU 1 TO PSU 2 TO PSU 2 TO TB14 TB13
KATH 1 KATH 1 KATH 2 KATH 2 LOW FLOW LOW FLOW
TB18 TB17 TB16 TB15 ALARM 1 ALARM 2
Cable Glands for Cable
Terminations in
Hazardous Areas (Blue)
Note. The number of terminals, cable glands, low-flow alarms, PSU's and zener barriers
(flow alarms) vary according to ordering information details specified.
Fig. 4.5 Location of Main Components on Cubicle Backplate
Low Flow Alarm
Relay 1 (if fitted)
E SCR S1 S2 0V 0V -12V+12V
CH 1
I N COM NC NO
B8
LOW FLOW
ALARM RELAY No. 1
POWER SUPPLY
B9
LOW FLOW
ALARM RELAY No. 2
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45
No1 No2 TB11 TB10
TB12 ALARM AND ALARM AND
O/P FLOW ALARMS RETRANS 1 RETRANS 2
Cable Glands for
Cable Terminations
in Safe Areas
B7
UNIT No. 2
46 47 48 49 L N E E L N E E
MAINS MAINS
SUPPLY SUPPLY
TB6 TB7
System Safety Earth
Power Supply
Unit 2 (if fitted)
Low Flow Alarm
Relay 2 (if fitted)