Performance Tests and Calibration 4
34405A User’s and Service Guide 75
Performance Verification Tests
The performance verification tests are recommended as
acceptance tests when you first receive the instrument. The
acceptance test results should be compared against the
1- year test limits. After acceptance, you should repeat the
performance verification tests at every calibration interval.
If the instrument fails performance verification, adjustment
or repair is required.
Adjustment is recommended at every calibration interval. If
adjustment is not made, you must establish a 'guard band',
using no more than 80% of the specifications, as the
verification limits.
Zero Offset Verification
This test is used to check the zero offset performance of the
instrument. Verification checks are only performed for those
functions and ranges with unique offset calibration
constants. Measurements are checked for each function and
range as described in the procedure on the next page.
Zero Offset Verification Test
1 Connect the Shorting Plug to the HI and LO input
terminals. (see “Input Connections” on page 72). Leave
the current inputs open.
2 Select each function and range in the order shown in the
table below. Make a measurement and observe the result.
Compare measurement results to the appropriate test
limits shown in the table below (table continued on the
NOTE
Make sure you have read “Test Considerations” on page 71 before doing
the performance verification tests.
34405A users guide.book Page 75 Saturday, September 2, 2006 3:38 PM
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