User guide

7 - 3
PN 074-566-P1B
Composer Elite Operating Manual
5 Inject small amounts of helium into each of the two service ports. Verify the leak
rate does not exceed 1x10
-9
cm
3
/s.
NOTE: Contact INFICON if the leak rate exceeds 1x10
-9
cm
3
/s.
6 Spray helium around the welded connections of the VCR-4 fittings to the inlet
tube and outlet tube. Verify the leak rate does not exceed 1x10
-9
cm
3
/s.
7 Proceed to section 7.2.2 to verify the Secondary Containment Chambers
leak integrity.
or
7a If not leak testing the Secondary Containment Chambers, install VCR-2
Ag-plated stainless steel gaskets (PN 059-0640) and the VCR-2 plugs in the
service ports. (Swagelok recommends tightening gaskets to 1/8 turn past
finger-tight for stainless steel gaskets.)
WARNING
The service ports must be sealed for secondary
containment to function in the event of a diaphragm leak.
7.2.2 Leak Testing the Secondary Containment Chambers
Secondary Containment Chambers prevent process gases from escaping the
Acoustic Sensor if a diaphragm ruptures or a diaphragm seal fails.
This leak test checks for Secondary Containment Chamber leaks to atmosphere,
and for leaks where the tubing is welded to the Acoustic Sensor body.
This leak test may be performed with the Acoustic Sensor connected
to the process tubing.
WARNING
If the process tubing or Acoustic Sensor have been
exposed to toxic, pyrophoric, or otherwise dangerous
chemicals, thoroughly purge these chemicals before
performing this leak test.
CAUTION
Do not begin this test until the Acoustic Sensor’s
temperature drops below 30°C.