ABB EL3000 Series Manual page 30

30 EL3000 CONTINUOUS GAS ANALYZERS
Example of sample conditioning
1 Sampling point with primary shut-off valve
2 Multi-way ball valve
3/2-way ball valve 1)
3
Fine-control valve
4
Flowmeter with needle valve and alarm contact
5
2-way ball valve 1)
6
2-way ball valve 1)
7
Air filter 1)
8
Gas analyzer
9
Flowmeter without needle valve, with alarm contact
10
11 Purge gas cylinder with N
12 Test gas cylinder with e.g. 2 ppm of O
13 Test gas cylinder with 8 ppm O
Pump
14 1)
Needle valve 1)
15
1) Option
2) A hard-mounted test gas cylinder is normally adequate.
The annual check of the reference point can also be carried out with a
non-stationary air supply.
| CI/EL3000-EN REV. B
1)
2
in N 2)
2 2
in N 1)
2 2