Models 947, 948 and 960 Leak Detectors Operations and Service Manual
4-24
CAUTION
Do not use grease or other substances on O-rings that
come in contact with the spectrometer tube.
Wipe all O-rings clean with a lint-free cloth before
installation to ensure that no foreign matter is present to
impair the seal.
3. Hold the spectrometer tube against the centering ring, attach the NW25 clamp, and
tighten the clamp fully.
4. Reconnect the ion source connector, the preamplifier locking D-sub connector, the
Molex connector to the heater, and the suppressor.
a. When attaching the locking connector (Figure 4-9), 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 4-9
947/948/960 Spectrometer Tube Installation
NOTE
To ensure reliable testing, after servicing any part of the
vacuum system, the 947/948/960 must be leak checked
again. Refer to “Leak Checking” on page 4-5 for
guidelines.
5. Replace the front panel and connect mains power.
6. 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.
Heater Power
Ion Source Connector
Suppressor
Preamplifier Locking Connector