Keysight E1412A 6 1/2 Digit Multimeter Service Guide
35
Performance Test Record
Verification Tests
Performance Test Record
Table 4-7, Performance Test Record for the Keysight E1412A Multimeter, is a
form you can copy and use to record performance test results for the multimeter.
This form shows the multimeter accuracy limits, the measurement uncertainty
from the source and the test accuracy ratio (TAR).
Multimeter Accuracy
Accuracy is defined for DC voltage, AC voltage, 2-wire ohms, 4-wire ohms, DC
current, AC current and frequency measurements using the 1-year specifications
in Appendix A. The "High Limit" and "Low Limit" columns represent the
multimeter accuracy for the specified test conditions (reading and range).
Measurement Uncertainty
Measurement uncertainties listed in Table 4-7 are calculated assuming an
Keysight 3325A/B as the source for frequency measurements and a Fluke
5700A/5725A for all other measurements. The uncertainties describe error you
can expect from the source. These uncertainties are calculated from the 90-day
accuracy specifications for the Fluke 5700A and the 1-year specification for the
Keysight 3325A/B.
Test Accuracy Ratio (TAR)
The "Test Accuracy Ratio (TAR)" is calculated from (high limit - expected
measurement)/measurement uncertainty. "N/A" means measurement
uncertainty and TAR do not apply to the measurement. A small TAR indicates the
uncertainty of the source signal starts to approach the multimeter’s specification
limit.
The accuracy, measurement uncertainty and TAR values shown in
Table 4-6 are valid ONLY for the specific test conditions, test
equipment and assumptions described. If you use different test
equipment or change the test conditions, you will need to
compute the specific values for your test setup.
Summary of Contents for E1412A
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