62 Chapter 5 Command Summary; Acal - Agilent Technologies 3458A Calibration Manual

ACAL

Description
Remarks

62 Chapter 5 Command Summary

Autocal. Instructs the multimeter to perform one or all of its automatic
calibrations.
Syntax
ACAL [type][,security_code]
The type parameter choices are:
type
type Parameter Numeric Query
ALL
DCV
AC
OHMS
security_code
code to perform an autocal (when shipped from the factory, autocal is secured
with the security code 3458). When autocal is not secured, no security code
is required. Refer to the SECURE command for more information on the
security code and how to secure or unsecure autocal.
•
Since the DCV autocal applies to all measurement functions, you should
perform it before performing the AC or OHMS autocal. When ACAL
ALL is specified, the DCV autocal is performed prior to the other
autocals.
•
The AC autocal performs specific enhancements for ACV or ACDCV
(all measurement methods), ACI or ACDCI, DSAC, DSDC, SSAC,
SSDC, FREQ, and PER measurements.
•
The OHMS autocal performs specific enhancements for 2- or 4-wire
ohms, DCI, and ACI measurements.
•
Always disconnect any AC input signals before you perform an autocal.
If you leave an input signal connected to the multimeter, it may adversely
affect the autocal.
•
The autocal constants are stored in continuous memory (they remain
intact when power is removed). You do not need to perform autocal
simply because power has been cycled.
•
The approximate time required to perform each autocal routine is:
ALL:
DCV:
AC:
OHMS: 10 minutes
•
If power is turned off or the Reset button is pushed during an ACAL, an
error is generated. You must perform an ACAL ALL to recalculate new
calibration constants.
•
Related Commands: CAL, SCAL, SECURE
Equivalent
0 Performs the DCV, AC and OHMS autocals
1 DC voltage gain and offset (see first
Remark)
2 ACV flatness, gain, and offset (see second
Remark)
4 OHMS gain and offset (see third Remark)
When autocal is secured, you must enter the correct security
14 minutes
2 minutes and 20 seconds
2 minutes and 20 seconds
Description