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

1550C/1555
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,
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,
3. Apply 2 mAdc to the UUT.
4. Press the Start button and wait until the adjustment is complete; progress is
5. The charge measurement is now adjusted. Set the current source to STANDBY and
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 powerdown
command.
14
connecting the current source LO to UUT GUARD terminal, as shown in the
connection diagram.
connecting the current source LO to UUT Guard.
displayed.
disconnect it from the UUT.
Note