Service manual

Performance
Test Record
Table 4-1, Performance Test Record for the E1411 Multimeter, is a form
you can copy and use to record performance verification test results for the
multimeter. Page 3 of Table 4-1 shows multimeter accuracy, measurement
uncertainty and test accuracy ratio (TAR) values. See Appendix A -
Calculating Multimeter Accuracy for example calculations of Table 4-1
entries.
NOTE
The accuracy, measurement uncertainty, and TAR values shown in Table
4-1 are valid ONLY for the specific test conditions, test equipment, and
assumptions described. If you use different test equipment and/or change the
test conditions, you will need to compute the specific values for your test
setup.
Multimeter
Accuracy
Accuracy is defined for DC Voltage, AC Voltage, and 4-Wire Resistance
measurements using the 90-day specifications in Appendix A -
Specifications in the E1326A/E1411A User’s Manual or the
E1326B/E1411B User’s Manual. In Table 4-1, the "High Limit" and "Low
Limit" columns represent the multimeter accuracy for the specified test
conditions.
Measurement
Uncertainty
For the performance verification tests in this manual, measurement
uncertainties are calculated assuming a Datron 4708 source for inputs to the
multimeter. Measurement uncertainties in Table 4-1 are calculated for the
90-day accuracy specifications in the Datron 4708 User’s Handbook.
Test Accuracy
Ratio (TAR)
In Table 4-1, 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. If the
TAR value is <10:1, the TAR value is listed. If the TAR value is >10:1, the
entry is >10:1.
30 Verification Tests Agilent E1411A/E1411B Service Manual