Agilent Technologies 8935 Series, Руководство пользователя

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Chapter 4 97
Preventative Maintenance
Maintenance Procedures
Maintenance Procedures
Cleaning the Air Filter
NOTE
The cleaning interval is dependent on the environmental conditions
and application, it can be as often as six months in extremely dusty or
dirty environments or as long as two years in a clean, well maintained
facility.
The Test Set’s internal air filter requires periodic cleaning. Failure to
periodically clean this filter may result in decreased internal airflow,
increased internal operating temperature, and early failure of the Test
Set.
1. Remove the front frame and external cover to access the air filter,
see Figure 4-1 on page 99 . It is not necessary to remove the rear
frame. Refer to Chapter 5 , “Disassembly,” on page 101 for removing
the front frame and external cover.
2. Lift the filter from the Test Set’s chassis. Use a vacuum to clean the
filter. Use only a static-free vacuum cleaner or ionized air for the
removal of dust and debris.
Memory Backup AA Battery
Two battery sources are used to maintain the contents of the Test Set’s
memory when power is disrupted. One source is a set of two AA
batteries mounted behind the rear frame of the Test Set. You must
periodically change these batteries. The second battery source acts as a
backup to the AA batteries. It is internally mounted and is not user
serviceable.
CAUTION
Replace these batteries every 2-3 years. Failure to take prompt action
may result in loss of RAM data including IBASIC programs and
SAVE/RECALL states stored in the RAM.