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3151 And 3151A User Manual
Maintenance and Performance Checks 5-14
Adjustments
Environmental
Conditions
Tests should be performed under laboratory conditions having an
ambient temperature of 24
o
C
"
2
o
C and relative humidity of less than
70%. 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. Between
adjustments, always leave the top cover on the unit to keep the
internal temperature as stable as possible.
Warm-Up Period
Most equipment is subject to a small amount of drift when first turned
on. To ensure accuracy, turn on the power to the Model 3151/3151A
and allow it to warm-up for at least 30 minutes before beginning the
adjustment procedure
.
Recommended Test
Equipment
Recommended test equipment for troubleshooting, calibration, and
performance checking is listed at the beginning of this chapter in the
section entitled Recommend Test Equipment. Test instruments
other than those listed may be used only if their specifications equal
or exceed the required characteristics.
Adjustment
Procedures
All adjustments are performed with the POWER ON. The side covers
should be removed to allow access to test points and adjustments.
WARNING
Special care should be taken to prevent contact with live
circuits or the power line area. This could cause an
electrical shock resulting in serious injury or death. Use
an isolated tool when making adjustments.
When necessary, refer to the component layouts for
determining adjustment points. Follow the procedure in
the sequence indicated as some adjustments are
interrelated and dependent on the proceeding steps.
Verify that the waveform generator is functioning
according to the performance checks. Ensure that all
results are within or close to the range of the required
specifications; otherwise, refer to the troubleshooting
Summary of Contents for 3151
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