Teledyne GFC-7001T - Trace CO Analyzer - Manual (Page 265)

Troubleshooting and ServiceTeledyne API – Model T300/T300M CO Analyzer
Teledyne Analytical Instruments 265
Figure 12-12: GFC7001T/GFC7001TM – 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.
Confirm that the sample gas in connected correctly and is free to flow.
 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 flow from the Exhaust outlet.
 Gas bottles are not empty or low.
 Valves, regulators and gas lines are not clogged or dirty.
12.2.2.2. LOW FLOW
1. Check for leaks as described in Section 11.3.2. Repair the leaking fitting, line or
valve and re-check.
2. Check for the sample filter and the orifice filter for dirt. Replace filters (see 11.3.1).
3. Check for partially plugged pneumatic lines, or valves. Clean or replace them.
4. Check for plugged or dirty critical flow orifices. Replace them.