Model 9110T NOx Analyzer

Troubleshooting & Service

 

 

 

 

 

 

WARNING

 

FAULT CONDITION

POSSIBLE CAUSES

 

 

 

Sample Pressure is <15 in-Hg or >

If Sample Pressure is < 15 in-HG:

 

 

 

Blocked Particulate Filter

 

 

 

35 in-Hg

Blocked Sample Inlet/Gas Line

 

RCELL PRESS WARN

 

Normally 29.92 in-Hg at sea level

Failed Pressure Senor/circuitry

 

 

 

decreasing at 1 in-Hg per 1000 ft of

If Sample Pressure is > 35 in-HG:

 

 

 

altitude (with no flow – pump

 

 

 

disconnected).

Bad Pressure Sensor/circuitry

 

 

 

 

Pressure too high at Sample Inlet.

 

 

 

 

Heater configured for wrong voltage type

 

RCELL TEMP WARNING

 

RCELL temperature is < 45°C or >

Failed RCELL Temperature Sensor

 

 

Relay controlling the heater is not working

 

 

55°C.

 

 

 

Failed Relay Board

 

 

 

 

 

 

 

 

I2C Bus

 

REAR BOARD NOT DET

 

Motherboard not detected on

This WARNING only appears on Serial I/O COMM Port(s) Front

 

 

Panel Display will be frozen, blank or will not respond.

 

 

power up.

 

 

 

Failure of Motherboard

 

 

 

 

 

RELAY BOARD WARN

 

The CPU cannot communicate with

I2C Bus failure

 

 

Failed Relay Board

 

 

the Relay Board.

 

 

 

Loose connectors/wiring

 

 

 

 

 

 

 

 

Failed Sample Pump

 

 

 

 

Blocked Sample Inlet/Gas Line

 

SAMPLE FLOW WARN

 

Sample flow rate is < 350 cc/min or >

Dirty Particulate Filter

 

 

600 cc/min.

Leak downstream of RCELL Critical Flow Orifice

 

 

 

 

 

 

 

Failed Sample Pressure Sensor

 

 

 

 

Failed Vacuum Pressure Sensor

 

 

 

 

This message occurs at power on.

 

SYSTEM RESET

 

The computer has rebooted.

If it is confirmed that power has not been interrupted:

 

 

Failed +5 VDC power

 

 

 

 

 

 

 

Fatal Error caused software to restart

 

 

 

 

Loose connector/wiring

 

Note

A failure of the analyzer’s CPU, motherboard or power supplies can result

 

 

in any or ALL of the above messages.

 

Teledyne Analytical Instruments

265

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Teledyne 9110T instruction manual Teledyne Analytical Instruments 265