083730510A DCN8172
Teledyne API T500U CAPS NO
2
Analyzer with NumaView™ Software
93
PERFORMING A SAMPLE FLOW CHECK
Important
IMPACT ON READINGS OR DATA
Use an external calibrated flow meter capable of measuring
flows between 0 and 1000 cm³/min to measure the gas flow rate
though the analyzer.
Sample flow checks are useful for monitoring the actual flow of the instrument. A
decreasing sample flow may point to slowly clogging pneumatic paths, most likely the
sample flow restrictor or the sample filter. To perform a sample flow check:
1. Disconnect the sample inlet tubing from the rear panel SAMPLE port.
2. Attach the outlet port of a flow meter to the sample inlet port on the rear panel.
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Ensure that the inlet to the flow meter is at atmospheric pressure.
3. Check that the sample flow measured with the external flow meter is within
specification.
4. If sample flow is out of specification, first check for kinks in the tubing, then
check for leaks.
5. Once kinks and leaks are ruled out, first replace the sample flow restrictor, and
if the sample flow is still out of specification, replace the sample filter.
6. If flow is still out of spec, call Technical Support.
SERVICE AND TROUBLESHOOTING
This section contains methods to identify the source of performance problems with the
analyzer and procedures to service the instrument.
Note
Section 6, Principles of Operation, provides information about
how the instrument works, to support your understanding of the
technical details of maintenance.
CAUTION
The operations outlined in this section must be performed by
qualified maintenance personnel only.
WARNING – RISK OF ELECTRICAL SHOCK
Some operations need to be carried out with the analyzer open
and running.
Exercise caution to avoid electrical shocks and electrostatic or
mechanical damage to the analyzer.
Do not drop tools into the analyzer or leave them after your
procedures.
Do not short or touch electric connections with metallic tools
while operating inside the analyzer.
Use common sense when operating inside a running analyzer.
Summary of Contents for T500U
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