Teledyne t320u Manuale Utente
Teledyne API – Model T300/T300M CO Analyzer
Troubleshooting and Service
271
Figure 12-12: T300/T300M – Internal Pneumatics with CO
2
Sensor Option 67A
12.2.2. TYPICAL SAMPLE GAS FLOW PROBLEMS
12.2.2.1. 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.
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.
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
2. If the pump is operating but the unit reports no gas flow, perform a flow check as
described in Section 11.3.4.
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.
Place a finger over an Exhaust outlet on the rear panel of the instrument.
If gas is flowing through the analyzer, you will feel pulses of air being expelled
Place a finger over an Exhaust outlet on the rear panel of the instrument.
If gas is flowing through the analyzer, you will feel pulses of air being expelled
from the Exhaust outlet.
06864B DCN6314