Teledyne API Model 100AH SO2 Analyzer Instruction Manual, 02417, Rev. D
10.1.1 Fault Diagnosis with TEST Variables
The Table 10-1 indicates possible fault conditions that could cause the TEST functions to be
outside the acceptable range.
Table 10-1: Test Functions
Test Function Factory Set-Up Comment
RANGE 500 PPM This is the Range of the instrument. In standard configuration
all 2 outputs have the same range.
Dual range option allows different ranges for each output.
When enabled, there will be 2 range values displayed (low
range and high range).
Auto range option allows 2 different ranges for each channel,
and will automatically switch to the other range dynamically
as concentration values require. The TEST values will show
the range in which the instrument is currently operating, and
will dynamically display the alternate range as the range
changes occur.
STABIL The instrument stability is computed for 25 samples with 10
seconds default interval time. The stability value should be
compared to the value observed in the factory check-out.
During normal sampling, this value will be changing
depending on the sample concentration variation.
Faults that cause high stability values are:
1. Pneumatic leak
2. Low (below 600 mV) or very unstable UV lamp output
3. Light leak
4. Faulty HVPS
5. Defective Preamp board (02107)
6. Aging detectors
7. PMT recently exposed to room light
8. Dirty/contaminated reaction cell
(table continued)
10-3