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5700A/5720A Series II Calibrator
Service Manual
3-22
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
5790A
5700A
5790A
Resistance
3-16
3-22 3-26 3-28
to
3-30
3-22 3-26 3-28
to
3-30
3-18 3-20 3-21
3-16 3-18 3-20 3-21
DC
Volt
AC
Volt
AC
Current
Wide
Band
DC
Current
Frequency
Resistance
DC
Volt
AC
Volt
AC
Current
Wide
Band
DC
Current
Frequency
F0-0.EPS
Figure 3-7. Overview of Verification Tests