Teledyne T703, T703U 8.5.1.2. Noisy, Unstable, or Non-Linear Span O3 Readings , 8.5.1.3. Slow Response to Changes in Concentration , 8.5.1.4. The Analog Output Signal Level Does Not Agree With Front Panel Readings , 8.5.1.5. Cannot Zero , 8.5.1.6. Cannot Span

Teledyne API T703/T703U Calibrator Operation Manual General Troubleshooting & Service
185
8.5.1.2. Noisy, Unstable, or Non-Linear Span O3 Readings
 Check for leaks in the pneumatic systems as described in Section 7.2.
 Check for proper operation of the meas/ref switching valve as described in Section
8.5.2.
 Check for dirty absorption cell and clean or replace as necessary as described in
Section 7.2
 Check for operation of the A/D circuitry on the motherboard. See Section 8.4.9.1.
 Confirm the Sample Temperature, Sample Pressure and Sample Flow readings are
correct. Check and adjust as required.
8.5.1.3. Slow Response to Changes in Concentration
 Check for dirty absorption cell and clean or replace as necessary as described in
Section 7.2
 Check for pneumatic leaks as described in Section 7.2
 Check for improper materials in the inlet manifold.
 The photometer needs 800 cc3/min of gas flow. Make sure that this is accounted for
when calculating total required output flow for the calibrator (see Section 3.4.7).
8.5.1.4. The Analog Output Signal Level Does Not Agree With Front Panel Readings
 Confirm that the recorder offset (see Section 4.9.1.5) is set to zero.
 Perform an AOUTS calibration (see Section 4.9.2) and photometer dark calibration
(see Section 6.1.4).
8.5.1.5. Cannot Zero
 Check for leaks in the pneumatic system as described in Section 7.2.
 Confirm that the Zero gas is free of Ozone.
 The photometer needs 800 cc3/min of gas flow. Make sure that this is accounted for
when calculating total required output flow for the calibrator (see Section 3.4.7).
8.5.1.6. Cannot Span
 Check for leaks in the pneumatic systems as described in Section 7.2.
 Check for proper operation of the meas/ref switching valve as described in Section
8.5.2.
 Check for dirty absorption cell and clean or replace as necessary as described in
Section 7.2
 Check for operation of the A/D circuitry on the motherboard. See Section 8.4.9.1.
 Confirm the Sample Temperature, Sample Pressure and Sample Flow readings are
correct. Check and adjust as required.
 The photometer needs 800 cc3/min of gas flow. Make sure that this is accounted for
when calculating total required output flow for the calibrator (see Section 3.4.7).
07223C DCN6572