Teledyne 9110AH, Instruction Manual, Page: 141 / 181

TELEDYNE Model 9110AH NO
X
Analyzer Operator Manual, 01620, Rev. F
9-25
9.2.2 Flow Check
1. Check TEST function RCEL - this is the absolute pressure in the reaction cell. It should be 3
- 10 in-Hg-A.
2. Check that pump is running. Observe pump for proper operation.
3. Check that pump tubing is connected to rear of analyzer.
4. Confirm that the sample pump is producing vacuum by removing fitting at rear of analyzer
and checking for suction at fitting.
5. Check for correct flows.
The M9110AH has a flow splitter. The flow into the reaction cell is 50 cc/min, and the flow
through the bypass is 250 cc/min. It is best to use a calibrated flow meter to do the
following tests. It is assumed, however that no flow meter is available.
A. To test the bypass orifice, remove the 1/8” tube that comes from the heated orifice block
to the vacuum manifold. Briefly plug the fitting on the vacuum manifold with your
finger. You should notice a vacuum build up.
B. To test the sample flow orifice, remove the tube that connects the orifice block to the
vacuum manifold (bypass flow tube). Plug the fitting on the orifice block. Remove the
fitting that connects the orifice block to the sample inlet on the rear panel. Briefly plug
the fitting on the orifice block with your finger. You should notice a vacuum build up.
C. Remove the ozone fitting and compare relative flow rates shown in the TEST menu
under OZONE FL. It should read about 250 cc/min.
D. Re-connect the sample and ozone lines, then check RCEL TEST function for proper
vacuum reading. Should be 3 – 10 "-Hg-A.
6. Broken flow or pressure sensor.
7. Leak check analyzer. See Section 8.6 for leak check procedure.
9.2.3 No Response to Sample Gas
1. Confirm general operation of analyzer.
A. Check for AC Power, Section 9.2.1.
B. Do flow checks, Section 9.2.2.
C. Confirm that sample gas contains NO or NO
2
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