92
Teledyne API T500U CAPS NO
2
Analyzer with NumaView™ Software
083730510A DCN8172
C
HECKING FOR
P
NEUMATIC
L
EAKS
This section covers a simple leak check and a detailed leak check.
CAUTION - TECHNICAL INFORMATION
Do not exceed 15 psi when pressurizing the system during
either Simple or Detailed checks.
DETAILED PRESSURE LEAK CHECK
Obtain a leak checker that contains a small pump, shut-off valve, and pressure gauge to
create both over-pressure and vacuum. Alternatively, a tank of pressurized gas, with the
two-
stage regulator adjusted to ≤ 10
psi, a shutoff valve and a pressure gauge may be used.
ATTENTION
COULD DAMAGE INSTRUMENT AND VOID WARRANTY
Once tube fittings have been wetted with soap solution under a
pressurized system, do not apply or reapply vacuum as this will
cause soap solution to be sucked into the instrument,
contaminating inside surfaces.
1. Turn OFF power to the instrument and remove the instrument cover.
2. Install a leak checker on the sample inlet at the rear panel.
3. Cap rear panel ports and cap the pump port.
•
If zero/span valves are installed, disconnect the tubing from the zero
and span gas ports and cap the ports (Figure 2-2).
4. Pressurize the instrument with the leak checker, allowing enough time to fully
pressurize the instrument.
•
Do not exceed 10 psi pressure.
5. Once the leak has been located and repaired, the leak-down rate of the
indicated pressure should be less than 1 psi in 5 minutes after the pressure is
turned off. Replace the instrument cover and restart the analyzer.
6. If the leak still cannot be found, check each tube connection (fittings, hose
clamps) with soap bubble solution, looking for fine bubbles.
•
Pressurize the instrument with the leak checker, allowing enough time to
fully pressurize the instrument.
•
Do not exceed 10 psi pressure.
•
Wet the bench last with soap solution.
ATTENTION
COULD DAMAGE INSTRUMENT AND VOID WARRANTY
Once the fittings have been wetted with soap solution, do not
reapply vacuum as doing so will draw soap solution into the
instrument and contaminate it.
7. Clean surfaces from soap solution, reconnect the sample and pump lines and
replace the instrument cover.
8. Restart the analyzer.
Summary of Contents for T500U
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