131
Agilent Technologies Helium Leak Detector
DRAFT 12/11/17
Section 8. Unit Maintenance
NOTE All service must be performed by trained personnel only.
A mass spectrometer leak detector requires periodic maintenance to ensure continued
reliable operation. After prolonged use, the leak detector accumulates contaminants from
even the cleanest of products tested that eventually impair operation. A thorough
disassembly and cleaning of the entire vacuum system, which includes the valve block and
spectrometer, restores normal operation. For heavy production use, more frequent
overhauls may be needed. In most cases, maintenance personnel do this work, but Agilent
can also do this work under the terms of a service contract.
This maintenance section covers daily and as-required maintenance. It does not cover
overhaul of the entire vacuum system. If your leak detector requires service that is not
covered in this section, contact Agilent Customer Service. See the back cover of this manual
for a listing of our sales and service offices.
Important Reminders
In addition to the safety notes at the beginning of this manual, heed the following notes,
cautions, and warnings when performing maintenance.
WARNING Disconnect power from the leak detector before performing any
maintenance procedure that requires physically disconnecting
any part of the system.
The leak detector has two battery backed clocks which use a
primary (non-rechargeable) lithium coin battery from
Panasonic, P/N BR2477A/HB (3.0V, 1Ah) that is permanently
soldered onto a Motherboard PCB and Panasonic's P/N
BR2032 (3.0V, 500 mAh) located on the CPU PCB.. Never
replace this battery with a rechargeable type. Use only the
primary type of lithium battery. Only a qualified technician
should replace any battery. The battery has a life of 7 to 10
years.
The leak detector uses fuses and circuit breakers that are not
operator replaceable. Only a qualified technician should
replace any fuse.
Information about the fuses and circuit breakers is given in
Table 8-3 on page 134.
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