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Instruction Manual
IM-106-5500, Original Issue
August 2005
6-5
CCO 5500
Low detector level
Possible Cause Test Result Action
Incorrect wiring Checking wiring Fault clears No further action
Fault continues Proceed to next
possible cause
Dirty windows or
obstructed sight path
Check and clean the
Rx and Tx windows -
clear sight path
between Rx and Tx
Detector levels in
range
No further action
Fault continues Proceed to next
possible cause
Misalignment Realign Rx and Tx
units
Detector levels in
range
No further action
Fault continues Proceed to next
possible cause
Incorrect gain settings Adjust gains in signal
processor and/or Rx
Detector levels in
range
No further action
Fault continues Proceed to next
possible cause
Transmitter failure Check heater cartridge Cartridge open
circuit
Replace heater
cartridge
Cartridge OK Proceed to next
possible cause
Transmitter gas cell
drive failure
Check drive LED in
signal processor
LED flashing Proceed to next test
LED not flashing Contact your
Rosemount Analytical
supplier
Check gas cell/filter
drive
No movement Contact your
Rosemount Analytical
supplier
Movement Contact your
Rosemount Analytical
supplier
Detector saturated
Possible Cause Test Result Action
Incorrect gain settings Adjust gain settings in
signal processor
and/or Rx
Saturation clears No further action
Fault continues Proceed to next test
Monitor detector levels
from Rx
Signal OK Contact your
Rosemount Analytical
supplier
Signal faulty Contact your
Rosemount Analytical
supplier