Sample Gas Flow; Sample Gas Requirements; Sample Gas Set Up Connections - Ametek Dycor CG1100 Series User Manual

Sample Gas Flow

Sample Gas Requirements

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The mechanical flow meter protects the cell and prevents damage to the cell or cell O-
ring seal.

Sample Gas Set Up Connections

1. set the three-way valve on the back of the analyzer to OFF (Figure 3-3).
connect the sample gas to the metering valve (supplied by customer).
2.
connect the outlet of the metering valve to the sample gas inlet on the
1/8"
tubing
back panel of the analyzer using 1/8" tubing. This connection is labeled
Sample (Figure 3-3).
For the best response time, ensure that the sample line between the analyzer and sample gas
is as short as possible and keep the sample tubing diameter as small as possible.
3.
connect 1/8" nPT/1-4" tube adapter (not included) to the vacuum generator.
1/4"
connect 1/4" tubing from
tubing compression fitting at the vacuum generator.
The outlet pressure must be 25 Torr less than the minimum inlet pressure.
Minimum inlet pressure is the lowest pressure the inlet port will have under operating conditions.
4. connect the regulator to the vacuum generator. Figure 3-5.
Sample 1/8" tubing
Gas
Gas Inlet
Metering Valve
Customer-Supplied
Figure 3-5. Sample Gas Set-Up.
The sample gas should be clean and dry.
note that hydrocarbons and combustibles in the sample will oxidize
with available oxygen in the sample to provide lower-than-expected
oxygen levels. Be aware of this, especially if measuring oxygen in the
low PPM ranges.
if the sample contains particulates greater than 15 microns, install a
filter on the sample gas inlet.
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OUT on the back of the analyzer to the 1/4"
CG1100
Regulator
1/4" tubing
Vacuum
Generator
Gas Outlet
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Installation | 3-7