Noisy, Unstable, Or Non-Linear Span O Readings; Slow Response To Changes In Concentration; The Analog Output Signal Level Does Not Agree With Front Panel Readings; Cannot Zero - Teledyne T700 Operation Manual

Troubleshooting and Service
9.5.1.2. Noisy, Unstable, or Non-Linear Span O

9.5.1.3. Slow Response to Changes in Concentration

9.5.1.4. The Analog Output Signal Level Does Not Agree With Front Panel Readings

9.5.1.5. Cannot Zero

9.5.1.6. Cannot Span

266

Check for leaks in the pneumatic systems as described in Section 8.2.1.

Check for proper operation of the meas/ref switching valve as described in Section
9.5.2.

Check for dirty absorption cell and clean or replace as necessary as described in
Section 8.2.2.

Check for operation of the A/D circuitry on the motherboard. See Section 9.4.11.1.

Confirm the Sample Temperature, Sample Pressure and Sample Flow readings are
correct. Check and adjust as required.

Check for dirty absorption cell and clean or replace as necessary as described in
Section 8.2.2.

Check for pneumatic leaks as described in Section 8.2.1.

The photometer needs 800 cm
when calculating total required output flow for the calibrator (see Section 3.4.9).

Confirm that the recorder offset (see Section 4.10.1.5) is set to zero.

Perform an AIO calibration (see Section 4.10.1.6) and photometer dark calibration
(see Section 7.3.5).

Check for leaks in the pneumatic system as described in Section 8.2.1.

Confirm that the Zero gas is free of Ozone.

The photometer needs 800 cm
when calculating total required output flow for the calibrator (see Section 3.4.9).

Check for leaks in the pneumatic systems as described in Section 8.2.1.

Check for proper operation of the meas/ref switching valve as described in
Section9.5.2.

Check for dirty absorption cell and clean or replace as necessary as described in
Section 8.2.2.

Check for operation of the A/D circuitry on the motherboard. See Section 9.4.11.1.

Confirm the Sample Temperature, Sample Pressure and Sample Flow readings are
correct. Check and adjust as required.

The photometer needs 800 cm
when calculating total required output flow for the calibrator (see Section 3.4.9).
Teledyne API – Model T700 Dynamic Dilution Calibrator
Readings
3
3
/min of gas flow. Ensure that this is accounted for
3
/min of gas flow. Ensure that this is accounted for
3
/min of gas flow. Ensure that this is accounted for
06873B DCN6388