Table 11-2: Test Functions - Indicated Failures - Teledyne 300E Instruction Manual

Carbon monoxide analyzer

Table of Contents

TROUBLESHOOTING & REPAIR PROCEDURES

Test

Functions

(

As Displayed)

Time of Day clock is too fast or slow

TIME

§ To adjust see Section 7.3.6.

§ Battery in clock chip on CPU board may be dead.

Incorrectly configured Measurement Range(s) could cause response problems with a

Datalogger or Chart Recorder attached to one of the Analog Output.

RANGE

If the Range selected is too small, the recording device will over range.

If the Range is too big, the device will show minimal or no apparent change in readings.

Indicates noise level of instrument or Co concentration of Sample Gas (see Section 11.4.2

STABIL

for causes).

If the value displayed is too high the IR Source has become brighter. Adjust the variable

gain potentiometer on the Sync/Demod Board

If the value displayed is too low or constantly changing

AND:

The CO REF is OK:

§ Failed Multiplexor on the Mother Board

CO MEAS

§ Failed Sync/Demod Board

§ Loose Connector or wiring on Sync/Demod Board

CO REF

The CO REF is also BAD:

§ GFC Wheel stopped or rotation is too slow

§ Failed Sync/Demod Board IR Source

§ Failed IR Source

§ Failed Relay Board

§ Failed I

§ Failed IR Photo-Detector

When the analyzer is sampling Zero Air and the ratio is too low:

§ The Reference Cell of the GFC Wheel is contaminated or leaking.

§ The alignment between the GFC Wheel and the Segment Sensor, the M/R Sensor or

both is incorrect.

§ Failed Sync/Demod Board

MR Ratio

When the analyzer is sampling Zero Air and the ratio is too high:

§ Zero Air is contaminated

§ The alignment between the GFC Wheel and the Segment Sensor, the M/R Sensor or

both is incorrect.

§ Failed Sync/Demod Board

§ Failed IR Photo-Detector

§ See Table 11-1 for SAMPLE PRES WARN

PRES

SAMPLE FL

Check for Gas Flow problems. See Section 11.3.

SAMPLE

Sample temp should be close to BENCH TEMP. Temperatures outside of the specified range

TEMP

or oscillating temperatures are cause for concern

Bench temp control improves instrument noise, stability and drift. Temperatures outside of

BENCH

the specified range or oscillating temperatures are cause for concern. See Table 10-1 for

TEMP

BENCH TEMP WARNING

Wheel temp control improves instrument noise, stability and drift. Outside of set point or

WHEEL

oscillating temperatures are cause for concern. See Table 11-1 for WHEEL TEMP

TEMP

WARNING

192