Testing; Leak Test; Gas Flow Operational Test - Ametek 303B User Manual

Testing

Leak Test

The following test will assure that the monitor is free from leaks that will
interfere with proper operation.
1. Cap off the GAS OUT fitting.
2. Attach a 0 to 1000-kPa (150-psi) leak-free pressure gauge and leak-free
shutoff valve to the GAS IN fitting (the gauge must be between the
valve and the monitor).
3. Connect a regulated source of clean, dry, pressurized gas (N2, instru-
ment air, etc.) to the shutoff valve. With the valve closed, adjust gas
pressure to 700 kPa (100 psi) gauge. Slowly open the valve and allow
pressure in the monitor to equilibrate. Ensure that the monitor pres-
sure gauge reads 700 kPa (100 psi) and adjust if necessary. Close the
shutoff valve and disconnect the gas source from the IN fitting.
4. After 60 minutes, note the pressure. It should not drop more than 34
kPa (5 psi) gauge.
5. If pressure test is satisfactory, remove the gauge, shutoff valve, and
caps. Proceed to other tests in this section.
6. If gauge pressure has dropped more than 14 kPa (2 psi), repressurize
to 700 kPa (100 psi) and check all connections for leaks with a soap
solution. Repair leaks as needed.
7. Repeat steps 3 through 6 until a gauge pressure drop of less than 14
kPa (2 psi) is noted.
8. Remove pressure gauge, shutoff valve, and caps. Proceed to other
tests in this section.

Gas Flow Operational Test

1. Check all fittings for tightness.
!
WARNING
2. Connect a flow device such as a bubble-o-meter or a flow meter to the
GAS OUT fitting. Since it is more accurate, a bubble-o-meter is pre-
ferred.
If you use a hazardous gas, be sure the bubble-o-meter is vented to a
safe place.
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Maintenance 5-5