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• MINimum and MAXimum are not allowed with this command.
• Optional parameters that are left blank are filled from left to right. Therefore, it
may be necessary to use the syntax DEFault to note that a particular parameter has
been defaulted. For example, to default the number of readings and specify a
sample rate, the command would appear as:
CAL:ZERO DEF, .05, one
• CALibration:ZERO forces the internal reference (20 MHz) oscillator to be used.
Sample rates are attained using that reference.
• The default number of readings is 1000, and the default period is 1.0E-4 seconds.
These numbers were chosen such that the product of the two is a period that is an
integral multiple of both 50 Hz and 60 Hz line cycles
(0.1 seconds in this case).
• The product of the period and number of readings will be checked to see if it
exceeds 10 seconds, and if so, error -221;"Settings conflict; Calibration time too
long" occurs.
• The default <mode> is ONE, which calibrates using the current settings of
SENSe:VOLTage:RANGe and SENSe:FUNCtion. Specifying <mode> ALL will
do a zero calibration on all voltage range settings for both of the ports on the
specified channel.
• Related commands: CALibration:GAIN, CALibration:VALue,
CALibration:SECure:STATe
• *RST Condition: none
Example Performing a zero calibration
CAL:SEC:STAT OFF,E1429 Disable security, assuming factory-set
security code
CAL1:ZERO DEF,DEF,ALL Calibrate channel 1 using default sample
rate and number of points, calibrate all gain
ranges on both ports.
CALibration[<
chan
>]:ZERO
CALibration[<
chan
>] Subsystem Command Reference 211