Teledyne T300, Operation Manual, Page: 274 / 426

Troubleshooting and Service Teledyne API – Model T300/T300M CO Analyzer
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4. If gas flows through the instrument when it is disconnected from its sources of zero
air, span gas or sample gas, the flow problem is most likely not internal to the
analyzer. Check to make sure that:
•
All calibrators/generators are turned on and working correctly.
•
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 if the pump diaphragm is in good condition. If not, rebuild the pump (see
Section 11.3.2). Check the Spare Parts List for information on pump rebuild kits.
2. Check for leaks as described in Section 11.3.3. Repair the leaking fitting, line or
valve and re-check.
3. Check for the sample filter and the orifice filter for dirt. Replace filters (see 11.3.1).
4. Check for partially plugged pneumatic lines, or valves. Clean or replace them.
5. Check for plugged or dirty critical flow orifices. Replace them.
6. If an IZS option is installed in the instrument, press CALZ and CALS. If the flow
increases then suspect a bad sample/cal valve.
12.2.2.3. HIGH FLOW
The most common cause of high flow is a leak in the sample flow control assembly or
between there and the pump. If no leaks or loose connections are found in the fittings or
the gas line between the orifice and the pump, replace the critical flow orifice(s) inside
the sample flow control assembly.
06864B DCN6314