Teledyne M300E Indicated Failures, Pres Sample Fl Samp Temp Bench Temp Wheel Temp, Box Temp

Teledyne API – Technical Manual - Model 300E Family CO Analyzers Troubleshooting & Repair

The following table contains some of the more common causes for these values to be out of range.

TEST

FUNCTIONS

(As Displayed)

TIME

RANGE

STABIL

CO MEAS

&

CO REF

MR Ratio

PRES

SAMPLE FL

SAMP TEMP

BENCH

TEMP

WHEEL

TEMP

BOX TEMP

Table 13-2: Test Functions - Indicated Failures

INDICATED FAILURE(S)

Time of day clock is too fast or slow. To adjust, see Section 6.5.4.

Battery in clock chip on CPU board may be dead.

Incorrectly configured measurement range(s) could cause response problems with a Data logger or chart recorder attached to one of the analog output.

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 13.4.2 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 (see Section 13.5.6.1).

If the value displayed is too low or constantly changing and the CO REF is OK:

∙Failed multiplexer on the mother board

∙Failed sync/demod board

∙Loose connector or wiring on sync/demod board

∙If the value displayed is too low or constantly changing and the CO REF is bad:

∙GFC Wheel stopped or rotation is too slow

∙Failed sync/demod board IR source

∙Failed IR source

∙Failed relay board

∙Failed I2C bus

∙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

When the analyzer is sampling zero air and the ratio is too high:

∙Zero air is contaminated

∙Failed IR photo-detector

See Table 13-1for SAMPLE PRES WARN. Check for gas flow problems (see Section 13.2).

SAMPLE TEMP should be close to BENCH TEMP. Temperatures outside of the specified range or oscillating temperatures are cause for concern.

Bench temp control improves instrument noise, stability and drift. Temperatures outside of the specified range or oscillating temperatures are cause for concern. Table 13-1for BENCH TEMP WARNING.

Wheel temp control improves instrument noise, stability and drift. Outside of set point or oscillating temperatures are causes for concern. See Table 13-1for WHEEL TEMP WARNING.

If the box temperature is out of range, check fan in the power supply module. Areas to the side and rear of instrument should allow adequate ventilation. See Table 13-1for BOX TEMP WARNING.

04288D DCN5752 271