INFICON DataFID Portable Flame Ionization Detector for Leak Detection and Repair (LDAR) - Manual (Page 88)

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If you will be using the DataFID in a highly contaminated area where it is possible
the oxygen content is below 10%, watch for indications of reduced flame height
such as lowered detection limits or a flame out fault.
Cause: Exhaust port is blocked.
Action: At low temperatures, water vapor, a by-product of the hydrogen flame, may
condense at the exhaust port. At subzero temperatures the water vapor will
freeze and obstruct the exhaust port. If the exhaust port becomes obstructed,
pump operation will be inhibited. Flame out may also result. Operate the DataFID
within the operating temperature range 0° to 50°C (32 to 122°F) .
Action: Replace the exhaust filter with a new or unblocked one. If this does not solve the
flame out issue, contact the INFICON local service personnel.
Cause: Hydrogen supply lines are full of air.
Action: If the DataFID has not been used for some time, it is possible that the hydrogen
supply lines contain air. Fill the hydrogen fuel cylinder and then open the
hydrogen shut-off valve. Allow the hydrogen to purge the system for about 5
minutes and then turn on the DataFID to start the flame.
Cause: Hydrogen supply lines are blocked.
Action: Contact the INFICON local service personnel.
Problem: Liquid has been aspirated.
Cause: The DataFID has been exposed to a liquid or condensing vapor that can pass through
the Teflon/Polypropylene filter.
Action: Contact the INFICON local service personnel.