Model 9110T NOx Analyzer

Troubleshooting & Service

 

 

Table 12-1: Front Panel Warning Messages

 

 

 

 

 

WARNING

FAULT CONDITION

POSSIBLE CAUSES

 

 

 

AZERO valve not working

 

 

Auto-zero reading above 200 mV.

Valve control driver failed

 

AZERO WARN

Bad Relay PCA

 

Value shown in message indicates

 

Failed +12 VDC power supply

 

XXX.X MV

auto-zero reading at time warning

 

Gas leak across AZERO Valve ports

 

 

was displayed.

 

 

Dirty Reaction Cell

 

 

 

 

 

 

O3 flow problem to RCELL

 

 

 

Box Temperature typically runs ~7°C warmer than ambient

 

BOX TEMP WARNING

Box Temp is < 7°C

temperature

 

Poor/blocked ventilation to the analyzer

 

or > 48°C.

 

 

Stopped Exhaust-Fan

 

 

 

 

 

 

Ambient Temperature outside of specified range

 

CANNOT DYN SPAN

Dynamic Span operation failed.

Measured concentration value is too high or low

 

Concentration Slope value to high or too low

 

 

 

 

CANNOT DYN ZERO

Dynamic Zero operation failed.

Measured concentration value is too high

 

Concentration Offset value to high

 

 

 

 

CONFIG INITIALIZED

Configuration and Calibration data

Failed Disk on Module

 

reset to original Factory state.

User erased data

 

 

 

 

 

Heater configured for wrong voltage type

 

CONV TEMP WARNING

NO2 NO Converter temperature <

Failed converter Temperature Sensor

 

305°C or > 325°C.

Relay controlling the Heater is not working

 

 

 

 

 

Failed Relay Board

 

DATA INITIALIZED

Data Storage in DAS was erased.

Failed Disk-on-Module

 

User cleared data.

 

 

 

 

 

 

No +15 VDC power supply to Preamplifier PCA

 

HVPS WARNING

High voltage power supply output

Drive voltage not adjusted properly

 

outside of warning limits specified by

Failed PMT Preamplifier PCA

 

 

HVPS_SET variable.

Dirty reaction cell

 

 

 

Bad pneumatic flow

 

 

 

Heater configured for wrong voltage type

 

IZS TEMP WARNING

Permeation tube oven temperature is

Failed permeation tube Temperature Sensor

 

< 45°C or > 55°C.

Relay controlling the Heater is not working

 

 

 

 

 

Failed Relay Board

 

 

 

Failed Sample Pump

 

OZONE FLOW

 

Blocked O3 dryer

 

O3 flow rate is < 50 cc/min or >

Blocked inlet/outlet to O3 purifier

 

WARNING

150 cc/min.

Dirty O3 dryer DFU

 

 

 

Leak downstream of RCELL

 

 

 

Failed O3 Flow Sensor

 

 

Ozone generator is off. This is the

O3 generator override is turned ON.

 

 

only warning message that

 

OZONE GEN OFF

Electrical connection between motherboard and generator is

 

automatically clears itself. It clears

 

faulty.

 

 

itself when the ozone generator is

 

 

Bad +15VDC power supply

 

 

turned on.

 

 

 

 

 

 

 

 

 

 

PMT fan not operating

 

PMT TEMP WARNING

Sample temperature is < 5°C or >

Failed PMT Temperature Sensor

 

12°C.

TEC not functioning

 

 

 

 

 

Failed PMT Preamp PCA

 

Teledyne Analytical Instruments

264

Page 264
Image 264
Teledyne 9110T instruction manual Front Panel Warning Messages, Xxx.X Mv, Ozone Flow