Models 947, 948 and 960 Leak Detectors Operations and Service Manual
4-21
4.2.5.5 Reinstallation of the Spectrometer Tube
WARNING
Liquid nitrogen causes burns upon contact. Use
appropriate protective devices, including heavy loose
gloves and eye or face shields.
NOTE
Models 948/960 only:
Before servicing the
Spectrometer Tube, refer to “Liquid Nitrogen Cold Trap
(Models 948/960 only)” on page 4-10 for the procedure
to empty the Cold Trap, steps 1, 2, and 3. Do not refill
the Cold Trap until service is complete.
To reinstall the spectrometer tube:
1. Place the cleaned, new, ungreased centering ring and O-ring on the vacuum flange of
the spectrometer tube.
2. Hold the spectrometer tube
➀
in place and attach the KF clamp
➁
and tighten
as required.
3. Reconnect the four electrical connections that were disconnected from the spectrometer
tube.
Pay special attention when attaching the locking connector shown in Figure 4-7.
a. Press the tabs on the sides of the connector.
b. Push the connector onto its mating part.
c. Slide the tabs to lock the connector in place.
Figure 4-7
947/948/960 Spectrometer Tube Installation
➀
➁
Locking Connector
