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Teledyne API Model T360/T360M Operation Manual Troubleshooting and Service
239
If gas is flowing through the analyzer, you will feel pulses of air being
expelled from the Exhaust outlet.
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.
8.2.2.2. LOW FLOW
Check if the pump diaphragm is in good condition. If not, rebuild the pump
(see Section 6.3.2). Check the Spare Parts List for in
formation of pump
rebuild kits.
Check for leaks as described in Section 6.3.3. Repair the leaking fitting, line
or valve and re-check.
Check for the sample filter and the orifice filter for dirt. Replace filters (see
Sections 6.3.1 and 8.6.1 respectively).
Che
ck for partially plugged pneumatic lines, orifices, or valves. Clean or
replace them.
If an IZS option is installed in the instrument, press
CALZ and CALS. If the
flow increases then suspect a bad sample/cal valve.
8.2.2.3. 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,
rebuild/clean the sample flow control assembly as described in Section 8.6.1.
8.2.2.4. DISPLAYED FLOW = “XXXX”
This warning means that there is inadequate gas flow. There are four conditions
that might cause this:
A leak upstream or downstream of the flow sensor
A flow obstruction upstream or downstream of the flow sensor
Bad Flow Sensor Board
Bad pump
To determine which case it is, view the sample pressure and sample flow
functions via the front panel. If the sample pressure is reading abnormally low,
then the cause is likely a flow obstruction upstream of the flow sensor. First,
check the sample filter and make sure it is not plugged and then systematically
check all the other components upstream of the orifice to ensure that they are not
obstructed.
07272B DCN6552