PerkinElmer Photovac MicroFID, User Manual

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Troubleshooting
operating temperature range 5 to 40°C (41 to
104°F ).
Action: The flame arrestor has become plugged.
Contact the Service Department.
Cause: Sample line is blocked.
Action: Ensure the sample line is not obstructed in any
way. If you are using the long sample probe,
ensure flow is maintained through the entire
length of tubing.
Cause: Inlet filter is plugged.
Action: Replace inlet filter. See Replacing the Sample
Inlet Filter on page 111.
Fault: Signal from zero gas is too high.
Cause: Contamination of sample line or fittings before the
detector.
Action: Clean or replace the sample line or the inlet
filter. See Replacing the Sample Inlet Filter
on page 111.
Cause: Span gas and zero air mixed up.
Action: Ensure clean gas is used to zero MicroFID.
Mark the calibration and zero gas bags
clearly.
Cause: Ambient air is contaminated.
Action: If you are unsure about the quality of the
ambient air, use a charcoal filter or a supply
of commercial zero grade air.
Cause: Hydrogen supply is contaminated
Action: Hydrogen may react with the carbon, in the
steel, inside the tank to produce methane.
This will only occur if the cylinder is in
poor condition and if the hydrogen has a
high moisture content. Replace the
hydrogen tank. Empty and refill the
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