17
8.2
Troubleshooting Guide
INDICATION
Lack of reading or output.
Unstable or no zero reading.
Full scale output at “no
flow” condition or with valve
closed.
Calibration off.
LIKELY REASON
Power supply off
Fuse blown
Filter screen
obstructed at inlet.
Occluded sensor tube.
PC board defect.
Power supply problem.
Gas leak.
PC board defective.
Defective sensor.
Gas leak.
Gas metered is not the
same as what meter was
calibrated for.
Composition of gas
changed.
Gas leak.
PC board defective.
RFE dirty.
Occluded sensor tube.
Filter screen obstructed at
inlet.
Transducer
is not mounted properly.
REMEDY
Check connection of power
supply.
Disconnect FMA1700A/1800A
transducer from power
supply; remove the shorting
condition or check polarities;
fuse resets automatically.
Flush clean or disassemble
to remove impediments or
replace.
Flush clean or or return to
factory for replacement.
Return to factory for replacement.
Check power supply for
appropriate output.
Locate and correct.
Return to factory for replacement.
Return to factory for replacement.
Locate and correct.
Use matched calibration.
See K factor tables in
APPENDIX 2.
Locate and correct.
Return to factory for replacement.
Flush clean or disassemble
to remove impediments.
Flush clean or return to
factory for replacement.
Flush clean or disassemble to
remove impediments or replace.
Check for any tilt or change
in the mounting of the
transducer; generally, units
are calibrated for horizontal
installation
(relative to the sensor tube).