Performing Leak Checks - Teledyne T802 Operation Manual

Teledyne API T802 Paramagnetic O

10.3.3. PERFORMING LEAK CHECKS

ONLY Perform Leak Checks using N
internal pneumatics.
10.3.3.1. VACUUM LEAK CHECK AND PUMP CHECK
10.3.3.2. PRESSURE LEAK CHECK
07275B DCN6418
Analyzer Operation Manual
2
OXYGEN IS A STRONG OXIDIZER.
Leaks are the most common cause of analyzer malfunction; Section 10.3.3.1
presents a simple leak check procedure. Section 10.3.3.2 details a more thorough
procedure.
This method is easy and fast. It detects, but does not locate most leaks. It also
verifies that the sample pump is in good condition.
1. Turn the analyzer ON, and allow enough time for flows to stabilize.
2. Cap the SAMPLE inlet port.
3. After several minutes, when the pressures have stabilized, note the following.
In the TEST menu, note the SAMPLE PRESSURE reading.
4. If the reading is < 10 in-Hg, the pump is in good condition and there are no
large leaks.
5. Check the sample gas flow. If the flow is <10 cm
no large leaks in the instrument's pneumatics.
If you can't locate the leak by the above procedure, use the following procedure.
Obtain a leak checker similar to the Teledyne API PN 01960, which contains a
small pump, shut-off valve and pressure gauge. Alternatively, a convenient
source of low-pressure gas is a tank of span gas, with the two-stage regulator
adjusted to less than 15 psi with a shutoff valve and pressure gauge.
Maintenance Schedule & Procedures
HAZARD
S O
TRONG XIDIZER
gas and after thoroughly purging the analyzer's
2
3
/min and stable, there are
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