Ecotech Serinus 40 - 7. Troubleshooting; Flow fault; Noisy;unstable readings

Troubleshooting
Page 115
7. Troubleshooting
Table 11 - Troubleshoot list
Error Message/Problem
Cause
Solution
Flow fault
Multiple possibilities
Refer to Section 7.1
Noisy/unstable readings
Multiple possibilities
Refer to Section 7.2
Calibration system error
Ensure calibration system is functioning correctly
and is leak free.
Ensure sufficient gas is available for instrument and
an adequate vent is available for excess gas.
Leaks
A leak in the analyser or calibration system dilutes
the sample stream and causes low span readings and
noise.
TE cooler, reaction cell
heater or converter heater
A failed temperature control allows the instrument
to drift with ambient temperature. Verify that the
cell temperature is 50C 3C and that the TE cooler
is 13°C 2°C and that the converter temperature is
325°C 5°C.
Hardware fault
Faulty optical bench component.
Faulty ozone generator.
Gain too high
1. Leak check (repair any leaks).
2. Optical filter in reaction cell contaminated
requires cleaning.
3. PMT voltage too low less than 640V.
4. BGnd Port flow too high >130cc/min. Service
instrument.
Cell pressure too high
(>280 torr)
1. Leak check (repair any leaks).
2. Replace external pump.
3. BGnd Port flow too high >130cc/min. Service
instrument.
4. Recalibrate pressure sensors.
PMT temperature too high
(>15°C)
1. Check optical bench heat sink fan is operating.
2. Check PMT cooler is operational, and correct
amount of thermal paste is applied.
Unstable ozone generator
Substitute ozone generator with known working
generator. If instrument now works replace ozone
generator.
Converter temp failure
Faulty heater or
temperature sensor
Refer to Section 7.3