Specifications

3 Calibration
44 Series N6700 Service Guide
Calibration Description
Refer to the “Equipment Required” section in chapter 2 for a list of
the equipment required for calibration. Also refer to “Measurement
Techniques” for information about connecting the voltmeter and
current shunt. Additional information about calibration follows:
 The correct password is required to enter the Admin menu,
which contains the calibration function. The password is factory-
set to 0 (zero). You can change the password once calibration
mode is entered to prevent unauthorized access to the calibration
mode. Refer to “Change the Calibration Password” at the end of
this section.
 Calibrate only ONE channel at a time. The calibration commands
accept only a single channel number for the channel parameter.
Calibration cannot be performed on channels that have been
grouped. If any channels have been grouped, they must be
ungrouped before they can be calibrated.
 When calibrating the unit using SCPI commands, most steps
involve sending a *OPC? query to synchronize with the power
system’s command completion before proceeding. The response
from the instrument must be read each time *OPC? is given. In
some steps, it may take up to 30 seconds for *OPC? to respond.
 Once started, you must perform the complete calibration
procedure in its entirety. As each calibration section is
completed, the instrument calculates new calibration constants
and begins using them. However, these constants are not saved in
nonvolatile memory until a SAVE command is explicitly given.
 Exit the calibration mode either by logging out of the Admin
menu or by sending CAL:STAT OFF. Note that any channels that
were calibrated but not saved will revert to their previous
calibration constants.
Calibration Switches
Two switches control the access to calibration commands. The
switches are on the interface board and are accessible by removing
the top cover. Refer to “Accessing the Calibration switch” in chapter
4. Switches 1 and 2 set the calibration configuration as follows:
Sw 1 Sw 2 Description
Normal ON ON This is the default or as-shipped switch setting. The calibration
functions are accessible after entering a numeric password. The
default password is 0 (zero).
Clear
password
OFF ON The admin/calibration password is reset to 0 when the
instrument is first powered on. Use this setting if you have
forgotten the password.
Inhibit
calibration
OFF OFF All calibration commands are disabled. This is useful where
calibration access is guarded by instrument seals.