SERVO
PRO NANOCHROME Gas
Analyser
106
04416001A / Revision 7
engagement. Pipe thread connections should be avoided as they are usually
sealed with Teflon tape.
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 VCR gaskets each time the tubing is connected.
6.3.2
Carrier Gas Hardware Selection
The use of high grade carrier gas will improve the analyser performance. It is
recommended to feed at least 5N 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_01
SERVOPRO PUREGAS, 1/8" COMP, 110V
02005A1_02
SERVOPRO PUREGAS, 1/8" COMP, 220V EU
02005A1_03
SERVOPRO PUREGAS, 1/8" COMP, 220V UK
02005A1_04
SERVOPRO PUREGAS, 1/8" VCR, 110V
02005A1_05
SERVOPRO PUREGAS, 1/8" VCR, 220V EU
02005A1_06
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 85psig at the analyser for O2
background gas and 80psig for all other background gases. For the calibration
