Equipment Connections; Performing The Calibration; Entering The Calibration Values; Saving The Calibration Constants - Agilent Technologies 654 A Series Operating Manual

Equipment Connections

For voltage calibration:
•
Disconnect all loads from the power supply.
•
Connect the supply for local sensing (see Figure 4-1 or Figure 4-2).
•
Connect a DVM across the output terminals.
For current calibration:
•
Disconnect all loads from the power supply.
•
Connect the appropriate shunt resistor across the output terminals (see Table A-1).
•
Connect a DVM across the sense termina1s of the shunt resistor.
For OVP Calibration
•
None (The firmware performs the calibration based on the voltage calibration constants.)
Note
You can exit the calibration procedure at any time without changing the existing calibration constants. To
do this, press

Performing The Calibration

Seven shifted keys and the Entry keypad are used for calibration functions (See "Chapter 5 - Front Panel Operation" for an
explanation of shifted keys and the keypad). The following procedures assume you understand how to operate the front
panel keys and that the test equipment is connected.

Entering the Calibration Values

Use the procedure in Table A-2 for entering new calibration values.

Saving the Calibration Constants

Storing the calibration constants overwrites the existing ones in nonvolatile memory. If you are not
absolutely sure that you want to store the new constants, omit this step. The power supply calibration
constants then will remain unchanged.
To replace any existing calibration constants with ones you have just entered, press
on the display.

Changing the Calibration Password

You can change the password only when the module is in the calibration mode (which requires you to know the present
password). When in this mode, proceed as follows:
1. Press .
2. In response to the prompt, enter the new password. It can be up to 6 integers or 6 integers and a decimal point. If you
enter more than the permitted number of integers, the extra ones will be ignored.
AGAIN will appear on the display. Enter the new password a second time.
3.
When OK is displayed, you have changed the password. You do not have to save it. Press
4.
meter mode.
64 Calibration
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.
. CAL SAVED then appears
to return to the