Keysight E1412A 6 1/2 Digit Multimeter Service Guide
45
Introduction
Adjustments
Calibration Count (CAL:COUNt?)
The CAL:COUN? command provides you with a method of monitoring the
number of times your multimeter has been calibrated. You can determine
whether an unauthorized calibration has been performed by monitoring the
calibration count. The instrument will respond to the CAL:COUN? command by
returning the number of calibration RAM entries completed since factory
initialization. The calibration number increments for each adjustment point and a
complete calibration of the multimeter increases the calibration count value by
several counts.
–
The calibration count is stored in non-volatile memory and does not
change when power has been off or after a remote interface reset.
–
The calibration count increments up to a maximum of 32,767 after which it
wraps around to 0.
–
You cannot program or reset the calibration count value. It is an
independent electronic calibration "serialization" value.
–
Your multimeter was calibrated before it left the factory. Read the
calibration count to determine its initial value upon receipt.
Calibration Message
You can store a message of up to 40 characters using the CAL:STRing command
from the remote interface. The message is readable from the remote interface
using the CAL:STRing? command. The calibration message is stored in secured
calibration memory (the multimeter must be unsecured to change the calibration
message).
The calibration message can be used to store messages like the calibration date,
the next calibration due date or an encoded version of the instrument’s
calibration secure code.
Aborting an Adjustment in Progress
Sometimes it becomes necessary to abort an adjustment once the procedure has
been initiated. Issuing a remote interface device clear command will abort the
adjustment in progress.
Never turn off mainframe power while the multimeter is making
an adjustment. If power is removed during a zero adjustment, ALL
calibration memory may be lost. If power is removed during any
gain adjustment, calibration memory for the function being
adjusted may be lost.
Summary of Contents for E1412A
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