264 VT1422A Command Reference Chapter 7
CALibration

Comments •Related Commands: CAL:VAL:RES, CAL:STOR ADC

•When Accepted: Not while INITiated
•Send with VXIplug&play Function: hpe1422_cmd(...)
Command
Sequence
CAL:CONF:RES connect reference resistor to Calibration
Bus
*OPC? or SYST:ERR? must wait for CAL:CONF:RES to
complete
(now measure ref resistor with external DMM)
CAL:VAL:RES <measured value> Send measured value to module
CAL:STORE ADC Store cal constants in non-volatile
memory (used only at end of complete
cal sequence)

CALibration:CONFigure:VOLTage

CALibration:CONFigure:VOLTage <range>,<zero_fs> connects the on-board
voltage reference to the Calibration Bus. A measurement of the source voltage can
be made with an external multimeter connected to the H Cal and L Cal terminals on
the Terminal Module or the VH, VL, ΩH, and ΩL terminals on the Cal Bus
connector when not using a terminal module. The <range> parameter controls the
voltage level available when the <zero_fs> parameter is set to FSCale (full scale).
Parameters

Comments •The <range> parameter must be within ±5% of one of the five following values:

0.0625 V dc, 0.25 V dc, 1 V dc, 4 V dc, 16 V dc. This parameter may be
specified in millivolts (mv).
•The expected FSCALE output voltage of the calibration source will be
approximately 90% of the nominal value for each range, except the 16 V range
where the output is 10 V.
•When Accepted: Not while INITiated
•Related Commands: CAL:VAL:VOLT, STOR ADC
•Send with VXIplug&play Function: hpe1422_cmd(...)
Parameter
Name Parameter
Type Range of
Values Default
Units
range numeric (float32) see comments volts
zero_fs discrete (string) ZERO | FSCale none