Maintenance
Calibration Adjustment
5
5-19
5-21. Calibration Adjustment
Under normal operating conditions the 8060A should maintain the
specifications given in Chapter 1 of this manual for at least one year after
calibration. If your 8060A has been repaired or if it has failed any of the
performance tests, you need to perform the calibration adjustments.
Test equipment needed for the adjustments is listed in Table 5-1. If the test
equipment is not available, your nearest Fluke Service Center will be glad to
help. Call the number listed in section 5-2 of this manual for assistance.
After you have completed the calibration adjustments, we recommend that
you complete the performance tests to verify proper operation. In the
following procedure, the 8060A that is being adjusted is referred to as the
UUT (Unit Under Test).
Note
The top ac shield should remain installed on the instrument while
the calibration adjustments are being performed. The positions of
the trimpots and trimcaps are marked on the top ac shield along
with a table summarizing the calibration procedures.
Note
The performance of the 8060A ac functions is affected by the
capacitance between the main pcb and the bottom ac shield, which
is dependent on the distance between them. The distance may vary,
depending on whether the top cover is installed. To minimize
performance variations, make certain the instrument is firmly
seated in the bottom case before making any calibration
adjustments. After you have performed the adjustments and
installed the top cover, if you find that the measurement values
obtained for the ac function performance tests are consistently too
high or too low, remove the top cover and repeat the adjustments
accordingly.
1. Allow the UUT to stabilize with the power off for at least 30 minutes at
an ambient temperature of 21 to 25°C (70 to 77°F).
2. Complete the calibration access procedure presented earlier in this
chapter.
3. Connect the equipment as shown in Figure 5-4 and turn on the
equipment.
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