Calibration Commands And Messages; Calibration Sequences - Fluke 8508A User Manual

8508A
Users Manual

Calibration Commands and Messages

The descriptions in the following pages are intended only as a guide to
the messages available to calibrate the instrument. They contain
neither examples nor calibration routines, and should NOT be used
directly as a basis for calibrating any part of the instrument. Some of
the commands, if used unwisely, will obliterate an expensive
calibration or re-calibration.

Calibration Sequences

Remote calibration via the IEEE 488 system bus generally follows similar sequences (and
is subject to similar constraints) as for local calibration. But because the remote method
does not require a human operator to gain access to a sequence of commands via a single
menu screen, it is possible to group commands together within bus message units.
For this reason the user should not always expect to find a one-to-one correspondence
between the local and remote calibration commands.
Refer to Chapter 6 for details of the required calibration points and procedure.
Enable Calibration
ENBCAL
Allows access to the calibration operations, provided the calibration key switch on the
instrument rear panel is set to "ENABLE".
EXTNL
Selects the external calibration facility where the user supplies the calibration source
signals and the calibration trigger commands.
SPECIAL
Allows access to a mode for 'special' calibrations and entry of protected data.
Execution Errors
An execution error is generated if the rear panel switch is not in the ENABLE position.
Power On and Reset Conditions
Calibration disabled.
Trigger "External Calibration"
4-46
Caution
phs
ENBCAL
Enable Calibration
CAL?
Trigger External Calibration
EXTNL
SPECIAL
phs
Nrf
adj271f.eps
adj272f.eps