3: Adjustment DMM6500 6½-Digit Multimeter with Scanning
Calibration and Adjustment Manual
3-6 DMM6500-905-01 Rev. E June 2021
Verify instrument date and time
Before adjusting calibration, verify the system date of the DMM6500.
From the front panel:
1. Press the MENU key.
2. Under System, select Settings. The SYSTEM SETTINGS menu opens.
3. Verify the date and time.
4. If necessary, correct the date and time.
Set up remote connections
For detail on remote communications, refer to the DMM6500 Reference Manual section "Remote
communications interfaces."
Calibration adjustment is performed by connecting reference signals to the DMM6500 and sending a
series of adjustment commands using one of the remote interfaces. The adjustment procedure may
be done interactively, programmatically, or using a combination of the two.
• Interactive: Manually set up and connect each reference signal, then send the appropriate
calibration adjustment command.
• Programmatic: A computer performs setup of calibrator source instruments and controls
appropriate settling delays before automatically sending calibration adjustment commands to the
DMM6500. The control program must determine when the adjustment step is complete and check
for adjustment errors before continuing to the next step.
The following section describes the DMM6500 adjustment commands that are used for a manual
interactive adjustment procedure. Techniques for controlling automated program timing and error
checking are described in Adjustment command timing and error checking (on page 3-47
).
Unlock calibration
To start making adjustments, you must unlock it by sending the calibration password:
cal.unlock("KI000CAL")
KI000CAL is the default password. You can change the password. Refer to cal.password (on page
4-7) for details.
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