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Teledyne API Model 100AH SO
2
Analyzer Instruction Manual, 02417, Rev. D
10.2.2 Flow Check
1. Check TEST function VACUUM PRES reading about 6 IN-HG and SAMP FLOW - Should
be 650 ± 60 cc/min.
2. Check that pump is running. Observe pump for proper operation.
3. Test that pump is producing vacuum by removing fitting at the inlet of the pump and
checking for suction at fitting.
4. Check for analyzer flow.
5. Remove the 1/4" fitting from the rear panel of the analyzer sample filter assembly and plug
the fitting with your finger and note the weak vacuum produced.
6. Check instrument inlet flow using separate flow meter and compare the flow rate to the
SAMP FLOW reading. If the flow is lower than expected flow, then leak check the analyzer
as described in Section 9.7. Check if the flow sensor is out of calibration (see Section 10.3.5)
or the orifice is plugged.
7. If there is no leak and all above procedures can not correct flow rate reading, then calibrate
the flow rate (see Section 10.3.5).
10.2.3 No Response to Sample Gas
1. Confirm general operation of analyzer.
A. Check for AC Power, Section 10.2.1.
B. Do flow checks, Section 10.2.2.
C. Confirm that sample gas contains SO
2
.
D. Check UV lamp is on.
2. Check instrument electronics.
A. Do ELEC TEST (ET) procedure in DIAGNOSTIC menu Section 10.1.3.2.
B. Do OPTIC TEST (OT) procedure in the DIAGNOSTIC menu Section 10.1.3.3.
C. Check if UV LAMP reading of TEST function is greater than 350 mV.
If the M100AH passes ET and OT that means the instrument is capable of detecting light and
processing the signal to produce a reading. Therefore, the problem is most likely in the
pneumatics.
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