5 inspecting the transducer, 6 leak detection procedures, 1 leak testing the primary containment vessel – INFICON Composer Gas Concentration Controller User Manual
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Composer Operating Manual
5.5 Inspecting the Transducer
If the Transducer is disassembled, all components should be visually inspected
during reassembly and any damaged components discarded in a safe and
environmentally sound manner. Upon completion of reassembly, but prior to the
installation of the insulation and transducer housing, the assembly should be
carefully leak tested using a high performance Helium mass spectrometer
capable of sensitivity in excess of 1x10
-9
std cc/sec. If the transducer has been
configured with the optional elastomer seals, refer to
of Optional O-ring Materials, on page 3-9
before leak checking.
5.6 Leak Detection Procedures
The Composer Transducer is constructed in a manner which provides both
primary and secondary containment of process gasses. Because of this
construction, a special leak detection procedure is required to verify the leak
integrity of both containment vessels. See
below and
.
5.6.1 Leak Testing the Primary Containment Vessel
This transducer may be tested for leaks while “in place”, that is; with the
process piping connected. To verify the diaphragm’s and the diaphragm seal’s
integrity:
CAUTION
Do not allow pressure of process piping to exceed 1
atmosphere gauge, be especially careful on
repressurization of the piping.
1
Remove the caps and gaskets from the two VCR-4 leak Detection ports.
Simultaneously use two wrenches to avoid excessive stress and damage to
the port.
2
Connect the Leak Detector and evacuate the process pipes by following the
Leak Detector and system manufacturer’s recommended procedures.
3
Probe with very small amounts of helium into the open Leak Test Ports.
4
Verify leak integrity, or replace and retest until leaks are eliminated. It is
recommended that leaking modules be returned to the factory for service
(refer to
section 1.4, How To Contact Customer Support, on page 1-4
for
more information).