Fluke 5720A service manual Full Verification, 7. Overview of Verification Tests

5700A/5720A Series II Calibrator

Service Manual

3-13. Full Verification

An independent external verification is recommended every two years, following normal periodic calibration or repair of the calibrator. Verification establishes and maintains parallel external traceability paths for the internal functions that are not adjusted or corrected during calibration. An example is the internal ac/dc transfer standard. Verification also serves as a check that internal calibration processes are in control.

Note

All performance limits specified in the test records apply to 90-day specifications for the Calibrator. If limits to other specifications are desired, the test records must be modified. A description of how to determine a guardband test limits is included in this section.

Note

Equivalent equipment and methods, either manual or automated, may be substituted for the following verification tests as long as the same points are tested, and equipment and standards used are at least as accurate as those specified. If standards are less accurate than specified, appropriate tolerance limit and/or accuracy reductions must be made to achieve equivalent results.

Not all of the procedures contained in this chapter need to be performed to verify your calibrator. This chapter contains the verification procedures for the 5720A and the 5700A Series II Calibrators. In addition, procedures are provided to verify the ac functions of the calibrator with a 5790A. The following roadmap provides a high-level overview of the verification tests discussed in this chapter.

5720A

Resistance

3-16

DC

Volt

3-18

DC

Current

3-20

Frequency

3-21

5790A

AC

Volt

3-22

AC

Current

3-26

Wide Band

3-28

to

3-30

5700A

Resistance

3-16

DC

Volt

3-18

DC

Current

3-20

Frequency

3-21

5790A

AC

Volt

3-22

AC

Current

3-26

Wide Band

3-28

to

3-30

F0-0.EPS

Figure 3-7. Overview of Verification Tests

3-22