Troubleshooting
A–4 H
2
S in Natural Gas
Instrument Problems
If the instrument does not appear to be hampered by gas leaks, contamination,
excessive sampling gas temperatures and pressures, or electrical noise, refer
to Table A–1 before contacting your sales representative for service.
Table A–1 Potential instrument problems and their solutions.
Symptom Response
Non-Operation (at start up) Is the power connected to both the
analyzer and power source? Is the
switch on?
Non-Operation (after start up) Is the power source good? (100-
250 VAC @ 50-60 Hz, 9-16 VDC, 18-
32 VDC).
Check fuse(s). If bad, replace with
equivalent amperage, slow-blow fuse.
Contact a factory sales representative
for service information.
Laser Power too Low fault
Turn off the power to the unit and
check the optical head cables for a
loose connection. Do not disconnect
or reconnect any optical head
cables with the power connected.
Check the inlet and outlet tubes to see
if they are under any stress. Remove
the connections to the inlet and outlet
tubes and see if the power goes up.
Perhaps the existing tubing needs to be
replaced with stainless steel flexible
tubing.
Press # 6 to capture diagnostic data
and send the file to SpectraSensors.
Possible alignment problem. Contact a
factory sales representative for service
information.
Possible mirror contamination issue.
Contact a factory sales representative
for service information. If advised to do
so, clean the mirrors by following the
instructions under “To clean the mir-
rors:” on page A-2.
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