Teledyne gfc 7000ta operation manual Typical Sample Gas Flow Problems, Flow is Zero

Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer

Figure 10-9: GFC 7000TA – Internal Pneumatics with O2 Sensor Option 65A

10.2.2. Typical Sample Gas Flow Problems

10.2.2.1. Flow is Zero

The unit displays a SAMPLE FLOW warning message on the front panel display or the SAMPLE FLOW test function reports a zero or very low flow rate.

Confirm that the sample pump is operating (turning). If not, use an AC voltmeter to make sure that power is being supplied to the pump. If no power is present at the electrical leads of the pump.

1.If AC power is being supplied to the pump, but it is not turning, replace the pump.

2.If the pump is operating but the unit reports no gas flow, perform a flow check as described in Section 9.3.4.

3.If no independent flow meter is available:

∙Disconnect the gas lines from both the sample inlet and the exhaust outlet on the rear panel of the instrument.

∙Make sure that the unit is in basic SAMPLE Mode.

Teledyne Analytical Instruments 232