ABB EasyLine EL3000 - Page 26

26 EL3000 CONTINUOUS GAS ANALYZERS | CI/EL3000-EN REV. C
… 3 Preparation for Installation
… ZO23
Installation and sample handling
NOTICE
Damage to the measuring cell
The ingress of liquids into the analyzer module can cause serious damage including destruction of the sample cell.
Note
The following information on installation and the sample handling must be considered for the measurement and the execution of
controlled calibrations (manual, automatic and externally controlled calibration).
Manually operated cocks and valves must be replaced by controlled valves suitable for the oxygen trace measurement, as required.
A
Reference air
B
Stainless steel pipe
C
FPM hose
1
Sampling point with primary shut-off valve
2
Multi-way ball valve
3
3/2-way ball valve
*
4
Fine-control and shut-off valve
5
Flowmeter with needle valve and fault-signalling contact
f
Air filter
*
g
Gas analyzer
h
Flowmeter without needle valve, with fault-signalling contact
i
Purge gas cylinder N
2
*
j
Test gas cylinder with for example 2 ppm O
2
in N
2
**
k
Test gas cylinder with 8 ppm O
2
in N
2
*
l
Pump*
m
Needle valve*
*
Option
**
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.
Figure 1: Sample handling example