Models 947, 948 and 960 Leak Detectors Operations and Service Manual
4-26
7. Clean the centering ring and adapter with acetone. making sure all traces of pipe sealant
are removed from the threads of the adapter.
8. Examine the O-ring for wear.
If necessary, use a new O-ring, otherwise clean the O-ring by wiping it O-ring clean
with a lint-free cloth before installation to ensure that no foreign matter is present to
impair the seal.
NOTE
If applicable, apply a small amount of Apiezon L grease and
wipe the O-rings "shiny" dry.
9. Place Loctite PST thread sealant onto the second and third threads of the new
thermocouple gauge.
10. Insert the thermocouple gauge into the adapter and hand tighten it fully.
11. Place the O-ring onto the centering ring and onto the flange of the SBA.
12. Place the adapter against the center ring.
13. Replace the KF25 clamp and tighten the wing nut fully.
14. Place the plug connector onto the thermocouple gauge.
The center post is keyed so it only goes on one way.
15.
Models 948/960 only:
Refill the Cold Trap using the procedure described in “Liquid
Nitrogen Cold Trap (Models 948/960 only)” on page 4-10.
16. Connect mains power.
17. Turn the leak detector on and wait for the system to be ready.
Allow the pumps to warm up if the detector has been off for some time.
18. Calibrate the thermocouple gauge using the procedure described in “System Pressure
Gauge (TC2) Calibration” on page 4-27.
19. Calibrate the leak using the procedure described in “Calibration Check” on page 4-5.
20. Leak check the assembly before using the 947/948/960 for testing.
Summary of Contents for 948
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