SERVOPRO CHROMA Gas Analyser
109
04400001A / Revision 7
and 120 psig for a FID detector. For the calibration gas, the recommended
maximum cylinder outlet pressure is 200 kPa (30 psig).
3.
Isolation and Sample Stream Selection Valves
The valves used for isolation or sample selection must be packless type i.e.
diaphragm or bellows type, to eliminate air diffusion.
6.3.3
Gas Connections - Rear Panel
The analyser configuration is application specific, consisting of a master
chassis, a master chassis with one or more secondary chassis, or a PC with one
or more secondary chassis. If required, each chassis may be fitted with an
external oven.
1. Master and Secondary Chassis
At the back of each chassis there are gas inlet connections for the process
and carrier gases, which are described below. See Figure 1 for the position
and description of the gas connections.
Carrier Inlet 1
The carrier gas is normally He or Ar, which will be taken to Carrier Inlet 1.
For multiple chassis configurations, the carrier gas should be split to feed
each chassis.
Carrier Inlet 2
Carrier Inlet 2 will be used when two different carrier gases are required in
a chassis.
Sample Inlet 1
The process gas or span gas is taken to Sample Inlet 1. For multiple chassis
configurations, the process gas or span gas should be split to feed each
chassis.
Sample Inlet 2
This is an option, and allows the span gas to be permanently connected to
the analyser. For multiple chassis, the Span gas should be split to feed each
chassis.
