Keysight Technologies 3458A Guide D'utilisation page 234

6 Command Reference
ACAL
Autocal. Instructs the multimeter to perform one or all of its self calibrations.
Syntax
ACAL [type][,security_code]
type
The type parameter choices are:
type
parameter
ALL
DCV
AC
OHMS
Power-on type = none.
Default type = ALL.
security
When autocal is secured, you must enter the correct security code to perform an
autocal. When autocal is not secured, no security code is required. Refer to the
SECURE
or unsecure autocal.
Remarks
– Since the DCV autocal applies to all measurement functions, you should
– The multimeter should be in a thermally stable environment with its power
234
Numeric
query equiv.
0
1
2
4
_ code
command for more information on the security code and how to secure
perform it before performing the AC or OHMS autocal. When ACAL ALL is
specified, the DCV autocal is performed prior to the other autocals.
turned on for at least 2 hours before performing any autocal. For maximum
accuracy, you should perform ACAL ALL once every 24 hours or when the
multimeter's temperature changes by ±1°C from when it was last externally
calibrated or from the last autocal.
Description
Performs the DCV, OHMS, and AC autocals
DC voltage gain and offset (see first Remark)
ACV flatness, gain, and offset (see second Remark)
OHMS gain and offset (see third Remark)
Keysight 3458A User's Guide