Emerson Rosemount OCX 8800 Reference Manual page 216

Troubleshooting
Table 8-2:
Alarm relay event
In calibration
O temperature error
2
Heater failure
O sensor error
2
Calibration failure
Calibration warning
Board temperature high
Unit failure
Sample block temperature error
COe sensor temperature error
206
Alarm Relay Event Groups
Alarms/conditions
Calibration in progress
Oxygen sensor heater temperature low (O2
Temp Low)
Oxygen sensor heater temperature high (O2
Temp Hi, O2 Temp Very Hi)
RTD excitation current error (Ref Curr Err)
Oxygen sensor heater could not reach final tem-
perature (O2 Htr Failure)
Combustibles sensor heater could not reach fi-
nal temperature (COe Htr Failure)
Sample block heater could not reach final tem-
perature (SB Htr Failure)
Oxygen sensor resistance high (O2 Sensor R
High)
Oxygen sensor disconnected (O2 Sensor Open)
Calibration failed (Cal Failed)
Calibration warning (Cal Warning)
Electronics temperature maximum exceeded
(Board Temp Hi)
Any non-recoverable or heater relay off alarm
(O2 Temp Hi, O2 Temp Very Hi, COe Temp Hi,
COe Temp Very Hi, SB Temp Hi, SB Temp Very
Hi, O2 Htr Ramp Rate, COe Htr Ramp Rat, SB
Heater Ramp Rate, O2 TC Shorted, O2 TC Re-
versed, COe TC Shorted, COe TC Reversed, SB
TC Shorted, SB TC Reversed, ADC Failure, ADC
Ref Error, Board Temp Hi, EEPRM Chksm Fail,
Line Freq Error, Line Voltage Low, Line Voltage
Hi, Htr Relay Failed, Out Brd Fail)
Sample block heater temperature low (SB Temp
Low)
Sample block heater temperature high (SB
Temp Hi, SB Temp Very Hi)
RTD excitation current error (Ref Curr Err)
Combustibles sensor heater temperature low
(COe Temp Low)
Combustibles sensor heater temperature high
(COe Temp Hi, COe Temp Very Hi)
RTD excitation current error (Ref curr Err)
OCX 8800