Fluke 5720A service manual Performing a Calibration Check

5700A/5720A Series II Calibrator

Service Manual

6.Reverse the dual-banana connector so that the center connector is connected to LO; then press E. The display shows the following:

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After a short time, a message appears indicating that the wideband calibration is complete.

7.To store the new constants, set the CALIBRATION switch to ENABLE and press “Store Values.” To discard the constants, press “DONE with Cal” and answer “YES” when the display asks for verification.

8.You have now completed the wideband gain calibration. Set the CALIBRATION switch to NORMAL, disconnect the wideband cable, and press r.

3-12. Performing a Calibration Check

A calibration check is similar to the calibration, with the primary difference being that no changes are made to the stored constants, and the internal check standards are used as the reference points. A calibration check produces a report similar to the normal calibration report, and shows any proposed changes.

This procedure can be performed from an external computer, and can be set to run automatically, with no assistance (there is no need to enable the CALIBRATION switch, since no constants are changed).

You can use the calibration check at any time to confirm the integrity of the calibrator without connecting external standards. The calibration check is also useful for collecting a performance history.

Before you begin this procedure, make sure the calibrator is powered on and has completed the appropriate warm-up period. Then follow this procedure to check the calibration.

1.Press the “Setup Menu” softkey; then press the “Cal” softkey to bring up the following menu:

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2. Press the “Cal Check” softkey to bring up the following display:

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