Emerson Rosemount CT5100 Reference Manual page 113

Reference Manual
00809-0100-4511
Recommended actions
11.9.13 BEKA display shows FAILURE status, and the Faults page
shows CELL HEATER fault due to temperature being out
of range
Recommended actions
11.9.14 BEKA display shows wrong gas temperature reading
Condition
The gas temperature reading is either a constant value (short circuit) or a high value of
21000 and above (open circuit) with gas readings being possibly affected.
Recommended actions
11.9.15 BEKA does not display any temp and pressure values and
NAMUR relays not working
Recommended actions
Rosemount CT5100
1. Check connection cable between cell temperature PT100 sensor and peripheral
board.
2. If interconnecting cable is OK, replace cell temperature PT100 resistance
temperature device (RTD).
1. Ensure all connections to peripheral board are intact.
2. Check cell temperature PT100 sensor is working properly.
3. Check heater relay is working (LED ON). If it is not, check relay power supply.
4. If all are OK, replace cell assembly heater block.
1. Check connection cable between gas temperature PT100 sensor and peripheral
board.
2. If interconnecting cable is OK, replace gas temperature PT100 resistance
temperature device (RTD).
1. Check power supply to peripheral board.
2. Check 20-way ribbon cable from motherboard to peripheral board.
3. Check connections to sensors and relays.
4. If all are OK, replace peripheral board.
Troubleshooting and diagnostics
May 2020
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