B - Verification and Calibration
66
Calibrating the Output Impedance (Agilent 6843A only)
NOTE:
The output voltage and output current must be calibrated before the output impedance
can be calibrated.
Action
Display
32.
Connect only the output impedance resistor across the output of the ac source.
Do not connect any other equipment.
33.
Press
Shift Calibration,
scroll to the CAL IMP command, and press
Enter
.
CAL:IMP
34.
Wait for the ac source to compute the output impedance calibration constant.
The display returns to Meter mode when the calculation is complete.
The ac source is now holding the new impedance calibration constants in RAM
Saving the Calibration Constants
CAUTION:
Storing calibration constants overwrites the existing ones in non-volatile memory. If you
are not sure you want to permanently store the new constants, omit this step. The ac
source calibration will then remain unchanged.
Action
Display
35.
Press
Shift Calibration,
scroll to CAL SAVE, and press
Enter
.
CAL:SAVE
36.
Press
Shift Calibration,
select CAL OFF, and press
Enter
to exit Calibration
mode. *RST and *RCL will also set the calibration state to OFF.
CAL OFF
Changing the Calibration Password
The factory default password is 0. You can change the password when the ac source is in calibration
mode (which requires you to enter the existing password). Proceed as follows:
Action
Display
1.
Begin by pressing
Shift Calibration
and scrolling to the CAL ON command.
CAL ON 0.0
2.
Enter the existing password from Entry keypad and press
Enter
3.
Press
Shift Calibration
and scroll to the CAL PASS command.
CAL:PASS 0
4.
Enter the new password from the keypad. You can use any number with up to
six digits and an optional decimal point. If you want the calibration function to
operate without requiring any password, change the password to 0 (zero).
NOTE:
If you want the calibration function to operate without requiring any password, change
the password to 0 (zero).
