Emerson Rosemount CT5100 Reference Manual page 111

Reference Manual
00809-0100-4511
11.9.7 BEKA shows low/noisy gas readings with FAILURE status
Condition
The Faults page my display MISALIGNMENT on Gas Sensor 3, weak or no pulses from the
affected laser with Misalignment of laser under Paths in the Monitoring tab, and possibly
a Pulse too noisy messsage.
Recommended actions
11.9.8 BEKA shows low/noisy O
status
Condition
The Faults page my display MISALIGNMENT on Gas Sensor 3, weak or no pulses from the
affected laser with Misalignment of laser under Paths in the Monitoring tab, and possibly
a Pulse too noisy messsage.
Recommended actions
11.9.9 BEKA shows low/noisy gas readings for all gases (except
O ) with FAILURE status
2
Condition
The Faults page my display MISALIGNMENT on Gas Sensor 3, weak or no pulses from the
affected laser with Misalignment of laser under Paths in the Monitoring tab, and possibly
a Pulse too noisy messsage.
Recommended actions
Rosemount CT5100
1. Check laser module power connection is intact.
2. Check laser is enabled on Gas Sensor 3.
3. Check current, TEC, and volt readings on Gas Sensor 3.
4. If these are different from expected values or out of range, replace laser
module.
1. Ensure power supply to O
2. Check detector output cables are intact.
3. Ensure O laser module is working properly (check laser current, volt and TEC
2
readings on Gas Sensor 3).
4. If the power supply and output cables are working, but the O
not, replace O detector
2
1. Ensure laser modules are working properly (check laser current, voltage, and
TEC readings on Gas Sensor 3); replace if necessary.
2. Check the cable between motherboard and detector TEC PCB (14- way ribbon
cable); replace if necessary.
Troubleshooting and diagnostics
gas readings with FAILURE
2
detector (LED ON) is present.
2
May 2020
laser module is
2
111