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Instruction Manual
IM-106-880, Rev 1.0
January 2007
7-11
OCX 8800
ALARM RELAY EVENTS The OCX 8800 contains an alarm relay that can be configured to activate on
one of twelve different groups of events. These event groups, and the
conditions that trigger them, are listed in Table 7-2, Alarm Relay Event
Groups.
Table 7-2. Alarm Relay
Event Groups
Alarm Relay Event Alarms/Conditions
In Calibration Calibration in progress
O
2
Temperature Error
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)
Heater Failure
Oxygen sensor heater could not reach final temperature
(O2 HTR Failure)
Combustibles sensor heater could not reach final temperature
(COe Htr Failure)
Sample Block sensor heater could not reach final temperature
(SB Htr Failure)
O
2
Sensor Error
Oxygen sensor resistance high (O2 Sensor R High)
Oxygen sensor disconnected (O2 Sensor Open)
Calibration Failure Calibration failed (Cal Failed)
Calibration Warning Calibration warning (Cal Warning)
Board Temperature High Electronics temperature maximum exceeded (Board Temp Hi)
Unit Failure
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 Rmp Rate, SB Htr Ramp Rate, O2 TC Shorted,
O2 TC Reversed, 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
Temperature Error
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)
COe Sensor
Temperature Error
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)
Power Input Error
AC power line frequency out of usable range (Line Freq Err)
AC power line voltage below minimum (Line Voltage Low)
AC power line voltage above maximum (Line Voltage Hi)
All Alarms Any alarm