Current Adjustment; Charge Adjustment; Additional Procedures; Identification (Id) - Fluke 1550C Calibration Manual

Current Adjustment

1. Select the Cal Current tab.
2. Attach a 2 mA current source to the LO and GUARD terminals of the UUT,
connecting the current source LO to UUT GUARD terminal, as shown in the
connection diagram.
3. Apply 2 mAdc to the UUT.
4. Press the START button and wait until the adjustment is complete.
5. The current measurement is now adjusted. Disconnect the current source.

Charge Adjustment

1. Select the Cal Charge tab.
2. Attach a 2 mA current source to the LO and GUARD terminals of the UUT,
connecting the current source LO to UUT Guard.
3. Apply 2 mAdc to the UUT.
4. Press the Start button and wait until the adjustment is complete; progress is
displayed.
5. The charge measurement is now adjusted. Set the current source to
STANDBY and disconnect it from the UUT.
This completes the Adjustment Procedure.

Additional Procedures

The following additional procedures are used during factory
calibration and repair but should not be performed in the field. They
are included for information only.
Various diagnostics are available from the Diagnostic tab as follows:

Identification (Id)

This button installs the default opvars in the UUT; the present calibration is lost
as the opvars are overwritten with the defaults. The user is presented with a
YES/NO dialog box, to prevent accidental selection of this option.

Restart UUT

This button first sets the UUT to CAL_DIAGS mode the sends out the restart
hardware command. The UUT is then restarted.

Shutdown UUT

This button puts the UUT into CAL_DIAGS mode and sends out the power down
command.
Note
Insulation Tester
Additional Procedures
15