
4-13
Leak Detection and Condensation Prevention
EdgeTech 8242XS releases are provided with a 3/8-inch diameter purging port in the Clevis End Cap. The
following procedure assumes the user has a vacuum pump, dry nitrogen gas cylinder, and compound
pressure/vacuum gauge all arranged on a manifold setup. The recommended procedure for preparation
of the instruments atmosphere is as follows:
After checking that all other ports are sealed, draw a near -3 PSIG vacuum via the purging port. Verify with
a gauge that the release holds the vacuum. Backfill with dry nitrogen then draw a near -3 PSIG vacuum.
Quickly insert the purging plug before the -3 PSIG vacuum is lost. If the environment where the release
was assembled was very humid then repeat the purging procedure 2 to 4 times before replacing the plug,
to remove all moisture.
1.
Verify that all (except purge port) O-ring seals have been cleaned, lubricated and assembled.
2.
Prepare the purge port plug for installation by cleaning and greasing it, the plug must be ready for
immediate insertion.
3.
Insert a purge port adaptor and draw a -3 PSIG vacuum, do not exceed -5 PSIG.
4.
Close the manifold valve to the instrument and allow the instrument to sit for 15 minutes. Check
the gauge afterwards and verify that the vacuum did not change. This step is done to detect gross
O-ring problems (cut or missing).
5.
Open the valve to the instruments purge port and:
a.
Backfill the Housing with dry nitrogen gas, do not 5 PSIG.
b.
Draw a -3 PSIG vacuum on the instrument, do not exceed -5PSIG.
c.
In humid environments, you should repeat this process up to four times.
d.
After drawing the final vacuum in this process, remove the purge hose and quickly insert
the purging plug before the -3 PSIG vacuum is lost.
e.
Replace the Purge Port Plug Retainer with the instructions in subsection
Note:
If the environment where the release was assembled was very
humid then repeat the purging procedure 2 to 4 times before replacing
the plug, to remove all moisture.
CAUTION!
When purging the instrument, be careful not to draw more than -5 PSIG
vacuum. Exceeding this figure can damage the battery or electronic
components, which in turn can result in instrument failure. If a purging
set up is not available, then place a desiccant pack inside the Housing to
help reduce moisture.
Summary of Contents for 8242XS
Page 18: ......
Page 22: ...SECTION 2 SPECIFICATIONS 2 4 Figure 2 2 ICD 8272 XS Short 0010816 ...
Page 23: ...2 5 Figure 2 3 ICD 8242XS Long 0011329 ...
Page 24: ......
Page 68: ...SECTION 5 MAINTENANCE 5 18 Figure 5 17 8242XS MART Main Sub Assembly 0002737 ...
Page 72: ...SECTION 5 MAINTENANCE 5 22 Figure 5 19 8242XS Acoustic Release Transducer Assembly 0003226 ...
Page 73: ...5 23 Figure 5 20 8242XS Release Mechanism Sub Assembly Page 1 of 2 002780 ...
Page 78: ...APPENDIX A REMOTE RELEASE A 2 Figure A 1 8242XS Remote Release 0018268 ...
Page 80: ...B 2 Figure B 1 8242XS Tandem Kit Drawing 0006657 ...