Varian 990 dCLD II, Руководство по эксплуатации

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Model 990 dCLD II Component Leak Detector
5-5
5.2 Recalibrate the Internal Calibrated Leak
Helium calibrated leaks typically degrade at 3 percent per year. The calibrated leak sup-
plied with your 990 dCLD II must be checked at least once a year to ensure it is at the value
stated on its tag. Failure to check the leak could result in unreliable testing. You can arrange
for testing and re-calibration at a lab of your choice.
Varian provides NIST-traceable calibrated leak testing and verification services. You can
contact Customer Service at 1-800-8VARIAN (1-800-882-7426) to arrange for re-calibra-
tion.
5.3 Spectrometer Tube Overhaul
Spectrometer tube overhaul consists of removing, cleaning, and re-installing the
990 dCLD II Spectrometer Tube Assembly. There are four basic sub-assemblies in the spec-
trometer tube. Removal instructions follow in the order below.
❑
Thermocouple Button (TC)
❑
Ion Source
❑
Preamplifier
❑
Magnetic Poles
Table 5-3 lists the tools and parts required during spectrometer tube overhaul.
Table 5-3 Tools and Parts Required for Spectrometer Tube Overhaul
Tools
Slotted screwdriver
5/64" Hex wrench
Part Number Description
82850302 Ion Source
R1266301 Button Thermocouple (Button TC)
670029096 Varian
Spectrometer Tube Cleaning Kit
O-rings (Parker 2-025 V747-75 Black)
Supplied with Ion Source, Button TC and
Preamplifier