Racal Instruments 3152, Руководство пользователя

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Maintenance and Performance Checks 5-3
2. Keep the soldering iron in contact with the PC board for a
minimum time to avoid damage to the components or
printed conductors.
3. To desolder components, use a commercial "solder sucker"
or a solder-removing SOLDER - WICK, size 3.
4. Always replace a component with an exact duplicate as
specified in the parts list.
Performance
Checks
The following performance checks verify proper operation of the
instrument and should normally be used:
1. As a part of the incoming inspection of the instrument
specifications;
2. As part of the troubleshooting procedure;
3. After any repair or adjustment before returning the
instrument to regular service.
Environmental
Conditions
Tests should be performed under laboratory conditions having an
ambient temperature of 25
o
C ±5
o
C and at relative humidity of less
than 80%. If the instrument has been subjected to conditions
outside these ranges, allow at least one additional hour for the
instrument to stabilize before beginning the adjustment procedure.
Always perform a self-test sequence before commencing with the
performance checks. The self-test, if executed without any failure,
ensures proper operation of the synthesizer. If self-test failures have
been encountered, the instrument first needs to be serviced and the
source of failure removed. Instructions on how to perform self-test
is given later in this chapter in the Self-Test section.
Warm-Up Period
Most equipment is subject to a small amount of drift when it is first
turned on. To ensure accuracy, turn on the power to the Model 3152
and allow it to warm-up for at least 30 minutes before beginning the
performance test procedure.
Initial Instrument
Setting
To avoid confusion as to which initial setting is to be used for each
test, it is required that the instrument be reset to factory default
values prior to each test. To reset the Model 3152 to factory
defaults, send either of the following commands:
RESet, or *RST.