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SERVOPRO CHROMA Gas Analyser
108
04400001A / Revision 7
Install a by-pass rotameter on the sample line near the analyser and close to the
stream selection valve. This increases the gas velocity to allow a faster purge of
the sample line and improve response time. Adjust the sample line pressure to a
value that brings the correct flow into the system. All lines must be cleaned and
purged to remove any traces of moisture or particles. Particles can damage the
stream selection valves and will trap moisture in the inlet filter.
CAUTION
Use new seals each time you connect VCR tubing.
6.3.2
Carrier Gas Hardware Selection
The use of high grade carrier gas will improve the analyser performance. It is
recommended to feed UHP grade cylinder gas through a gas purifier to generate
the carrier gas.
1.
Gas Purifier
The SERVOPRO PureGas purifier is available with either compression or VCR
fittings, and for use with 110V or 220VAC power supplies.
The model number to order is:
02005A1_0
1
SERVOPRO PUREGAS, 1/8" COMP, 110V
02005A1_0
2
SERVOPRO PUREGAS, 1/8" COMP, 220V EU
02005A1_0
3
SERVOPRO PUREGAS, 1/8" COMP, 220V UK
02005A1_0
4
SERVOPRO PUREGAS, 1/8" VCR, 110V
02005A1_0
5
SERVOPRO PUREGAS, 1/8" VCR, 220V EU
02005A1_0
6
SERVOPRO PUREGAS, 1/8" VCR, 220V UK
Note: gas purifiers will not remove Ar impurity from He carrier gas. For determination of Ar
impurity ensure the UHP grade carrier gas is certified to have less than 1ppb Ar present.
2.
Cylinder Pressure Regulator
A stable pressure is critical to the analyser performance, which means high quality
cylinder pressure regulators must be used. The pressure regulator should be a
stainless steel, double stage type. For the carrier gas, the cylinder outlet pressure
must be selected to provide 100psig at the analyser for PED and TCD detectors,