Typical Sample Gas Flow Problems; Flow Is Zero - Teledyne T300 Operation Manual

Teledyne API – Model T300/T300M CO Analyzer
SAMPLE GAS
Particulate Filter
INLET
EXHAUST
GAS OUTLET
PUMP
Figure 12-12: T300/T300M – Internal Pneumatics with CO

12.2.2. TYPICAL SAMPLE GAS FLOW PROBLEMS

12.2.2.1. FLOW IS ZERO

06864B DCN6314
CO
Probe
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 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
from the Exhaust outlet.
2
SAMPLE CHAMBER
Flow / Pressure
Sensor PCA
FLOW
SENSOR
Sample Gas
Flow Control
Troubleshooting and Service
INSTRUMENT CHASSIS
GFC Motor Heat Sync
GFC Wheel
Housing
SAMPLE
PRESSURE
SENSOR
Sensor Option 67A
2
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