Programming instructions

Chapter 5 Command Summary 61
Chapter 5 Command Summary
This section provides an alphabetical summary of commands that are used
in calibrating the 3458A (adjustments or performance verification). Detailed
command reference pages for each command are also included in this
chapter.
ACAL Autocal. Instructs the multimeter to perform one or all of its automatic
calibrations.
CAL Calibration. Calibrates the internal 7V reference to an external 10V standard
(CAL 10) followed by an ACAL DCV. It also calibrates the internal 40 KΩ
reference to an external 10 KΩ standard (CAL 10E3) followed by an ACAL
OHMS. Offset for the front and rear terminals are also calculated (CAL 0).
CAL? Calibration query. Returns one of four values for the calibration constant
specified; the initial (nominal) value, low limit, high limit, or actual value of
the specified constant.
CALNUM? Calibration number query. Returns a decimal number indicating the
number of times the multimeter has be adjusted.
CALSTR Calibration string (remote only). Stores a string in the multimeter's
nonvolatile calibration RAM. Typical uses for this string include the date or
place of adjustment/verification, technician's name, or the scheduled date for
the next adjustment.
REV? Revision query. Returns two numbers separated by a comma. The first
number is the multimeter's outguard firmware revision. The second number
is the inguard firmware revision.
SCAL Service calibration. Adjusts the AC section of the instrument. Calculates
the corrections to accurately measure frequency and calibrates the ac ranges.
SECURE Security code. Allows the person responsible for calibration to enter a
security code to prevent accidental or unauthorized adjustment or
autocalibration
TEMP? Temperature query. Returns the multimeter's internal temperature in
degrees Centigrade.
TEST Self-test. Causes the multimeter to perform a series of internal self-tests. If
all constants are within their lower and upper limits, the self-test passes.