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Teledyne API T703/T703U Calibrator Operation Manual General Troubleshooting & Service
185
8.5.1.2. Noisy, Unstable, or Non-Linear Span O
3
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.
Che
ck for dirty absorption cell and clean or replace as necessary as described in
Section 7.2
Che
ck for operation of the A/D circuitry on the motherboard. See Section 8.4.9.1.
Confirm the Sample Tem
perature, 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
Che
ck for pneumatic leaks as described in Section 7.2
Che
ck for improper materials in the inlet manifold.
The photometer needs 800 cc
3
/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 Sectio
n 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 cc
3
/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.
Che
ck for dirty absorption cell and clean or replace as necessary as described in
Section 7.2
Che
ck for operation of the A/D circuitry on the motherboard. See Section 8.4.9.1.
Confirm the Sample Tem
perature, Sample Pressure and Sample Flow readings are
correct. Check and adjust as required.
The photometer needs 800 cc
3
/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