24
Keysight E1412A 6 1/2 Digit Multimeter Service Guide
Verification Tests
Performance Verification
Performance Verification
The procedures in this section are used to test the electrical performance of the
multimeter using the specifications in Appendix A of the
E1412A User’s Manual
as the performance standards.
The Performance Verification Tests are recommended as acceptance tests when
the instrument is first received. The acceptance test results should be compared
against 90 day test limits. The 24 hour test limits should only be used for
verification of a function within 24 hours after performing a calibration of that
function (this will have set a new calibration constant for that function).
The performance verification tests should be repeated at each calibration interval
following acceptance. If the Keysight E1412A multimeter fails performance
verification, adjustment or repair is needed.
Zero Offset Verification
This procedure is used to check the zero offset performance of the Keysight
E1412A multimeter. A low thermal EMF four-terminal short is applied to the
input of the meter.
1
Check the "Test Conditions" section at the beginning of this chapter.
2
Verify the Input and Sense terminals are open. Set the DC Current function
and select each range in the order shown in Table 4-1. Compare the
measurement results to the appropriate test limits shown in Table 4-1.
3
Apply a 4-wire short (copper) across the Input HI-LO and Sense HI-LO
terminals as shown in Figure 4-1. Wait five minutes for thermal offset voltage
settling.
Figure 4-1
Zero Offset Verification Test Setup
Summary of Contents for E1412A
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