Ecotech Serinus 44 - Page 131

Troubleshooting
Page 131
Error Message/Problem
Cause
Solution
Low span
Leaks
A leak in the instrument or calibration system dilutes
the sample stream and causes low span readings and
noise.
Span calibration out
Adjust the span using the calibration procedure.
No response to span gas
Leaks/blockages
Leaks or blockages in tubes or valves. Perform leak
check and flow check and repair any leaks/blockages.
Faulty calibration source
Ensure calibration gas is plumbed correctly, is not
contaminated, has no leaks and is a certified
reference gas.
Hardware fault
Faulty optical bench or ozone generator.
Zero drift
Not enough zero air
supplied
Check calibrator excess flow is sufficient.
Faulty zero air
Ensure zero air sources are not overly polluted.
Leak
Perform leak test.
Lower than expected NO
X
and NO
2
NH
3
scrubber, NO
2
converter
Preform a NO
2
converter efficiency test (refer to
Section 5.7).
Lower than expected N
X
and NH
3
NH
3
converter, NH
3
selective scrubber, NO
2
converter
Preform a NH
3
converter efficiency test (refer to
Section 5.8).