OCX 8800

Instruction Manual

IM-106-880, Rev 1.0 January 2007

SB Temp Hi (Sample block heater temperature high, > 190ºC)

Probable Cause

Recommended Corrective Action

High noise in OCX power supply

Check power supply for line noise or voltage fluctuations. Install power line filter kit

 

(PN 6A00171G01) or high quality line filter for input power.

O2 Temp Very Hi (Oxygen sensor heater over maximum temperature, > 820ºC)

O2 Htr Rmp Rate (Oxygen sensor heater over maximum temperature ramp rate)

Probable Cause

Recommended Corrective Action

Incorrect O2 heater wiring

Check O2 heater wiring per Figure 7-3and Figure 6-4.Check the wiring at the heater

 

and inside the electronics housing. Correct wiring fault. Perform Reset procedure in

 

Section 3, Configuration and Startup to continue operation.

 

Check O2 thermocouple wiring per Figure 7-3and Figure 6-4.Check the wiring at the

Incorrect O2 thermocouple wiring

 

thermocouple and inside the electronics housing. Correct wiring fault. Perform Reset

 

procedure in Section 3, Configuration and Startup to continue operation.

Electronics package failure

Replace electronics package.

COe Temp Very Hi (Combustion sensor heater over maximum temperature, > 400ºC) COe Htr Rmp Rate (Combustibles sensor heater over maximum temperature ramp rate)

Probable Cause

Recommended Corrective Action

Incorrect COe heater wiring

Check COe heater wiring per Figure 7-3and Figure 6-5.Check the wiring at the heater

 

and inside the electronics housing. Correct wiring fault. Perform Reset procedure in

 

Section 3, Configuration and Startup to continue operation.

Incorrect COe thermocouple wiring

Check COe thermocouple wiring per Figure 7-3and Figure 6-5. Check the wiring at the

 

thermocouple and inside the electronics housing. Correct wiring fault. Perform Reset

 

procedure in Section 3, Configuration and Startup to continue operation.

Electronics package failure

Replace electronics package.

SB Temp Very Hi (Sample block heater over maximum temperature, > 260ºC)

SB Htr Rmp Rate (Sample block heater over maximum temperature ramp rate)

Probable Cause

Recommended Corrective Action

Incorrect sample block heater wiring

Check sample block heater wiring per Figure 7-3and Figure 6-4.Check the wiring at

 

the heater and inside the electronics housing. Correct wiring fault. Perform Reset

 

procedure in Section 3, Configuration and Startup to continue operation.

Incorrect sample block thermocouple wiring

Check sample block thermocouple wiring per Figure 7-3and Figure 6-4. Check the

 

wiring at the thermocouple and inside the electronics housing. Correct wiring fault.

 

Perform Reset procedure in Section 3, Configuration and Startup to continue operation.

Electronics package failure

Replace electronics package.

O2 TC Open (Oxygen sensor heater thermocouple open)

Probable Cause

Recommended Corrective Action

O2 thermocouple or thermocouple circuit open

Check O2 thermocouple and circuit wires for breaks or loose connections per Figure 7-3

 

and Figure 6-4.Repair breaks or loose connections or replace failed thermocouple.

 

Perform Reset procedure in Section 3, Configuration and Startup to continue operation.

COe TC Open (Combustibles sensor heater thermocouple open)

Probable Cause

Recommended Corrective Action

Combustibles sensor thermocouple open

Check thermocouple resistance (lead to ground) of reference and active thermocouples

 

per Figure 7-3and Figure 6-5. If either thermocouple is open or shorted to ground,

 

replace combustibles sensor.

 

 

 

Table continued on next page

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Emerson 8800 instruction manual SB Temp Hi Sample block heater temperature high, 190ºC

8800 specifications

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