Omega FMA 1500 User Manual page 26

INDICATION LIKELY REASON
gas leak
unstable or no
zero reading
pc board defective
full scale out-
put at "no flow" defective sensor
condition or
gas Leak
with valve
closed
calibration off 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
incorrect valve adjustment
FMA 1400
valve
pc board defect
does not work
in open
position cable or connectors malfunction
differential pressure too high
insufficient inlet pressure
incorrect valve adjustment
FMA 1400
valve does not
pc board defect
work in close
position
cable or connectors malfunction
orifice obstructed
REMEDY
locate and correct
return to factory for replacement
return to factory for replacement
locate and repair
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 disassemble to remove
impediments 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)
re-adjust valve (section 7.4)
return to factory for replacement
check cable and connectors or replace
decrease pressure to correct level
adjust appropriately
re-adjust valve (section 7.4)
return to factory for replacement
check cable and connectors or replace
disassemble to remove impediments
or return to factory
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