BIT 4886 051010
B-3
FIGURE B-1. USING CALIBRATION COMMANDS AND QUERIES
B.6
CALibrate:CURRent COMMAND
CAL:CURR
Syntax:
Short Form: CAL:CURR {MIN | MAX | ZERO}
Long Form: CALibrate:CURR {MIN | MAX | ZERO}
Description:
Selects Current calibration, only effective with power supply in Calibrate status.
CAL:CURR ZERO selects Current Zero Calibration. CAL:CURR MIN selects Current Full Scale Nega-
tive Calibration. CAL:CURR MAX selects Current Full Scale Positive Calibration. Normally Current
Zero is done first, then Current Full Scale Positive Calibration.
Related Commands:
CAL:STAT,
CAL:VOLT, CAL:CURR, CAL:ZERO, CAL:DATA, CAL:DPOT, CAL:SAVE. (See example, Figure B-1.)
B.7
CALibrate:DATA COMMAND
CAL:DATA
Syntax:
Short Form: CAL:DATA {N}
Long Form: CALibrate:DATA {N}
Description:
Provides fine adjustment of output during calibration only; Increases or decreases output by N
LSB’s.
CAL:CURR -N decreases output by N LSBs. CAL:CURR N increases output by N LSBs. This
command is used during calibration to adjust the output for zero calibration as well as full scale cali-
bration. This command is only effective if Calibration status is active.
Related Commands:
CAL:STAT, CAL:VOLT, CAL:LVOLT, CAL:LCURR, CAL:CURR, CAL:DPOT, CAL:ZERO, CAL:SAVE.
(See example, Figure B-1.)
B.8
CALibrate:DPOT COMMAND
CAL:DPOT
Syntax:
Short Form: CAL:DPOT {N} Long Form: CALibrate:DPOT {N}
Description:
Provides coarse adjustment of the output during calibration to within 5% of maximum and 2%
of nominal; increases or decreases output by 50 LSB increments.
Acceptable values of N are
within ±32, corresponding to ±1600 (50 x 32) LSB’s. CAL:DPOT -N decreases output voltage by N
LSBs. CAL:VOLT N increases output voltage by N LSBs. This command is used during calibration to
adjust the output for Zero calibration as well as Full Scale Positive calibration. Output voltage is moni-
tored on a calibrated digital multimeter and increased or decreased as required using this command.
Output current is monitored on a calibrated digital multimeter (reading voltage at the sense terminals
of the shunt resistor) and increased or decreased as required using this command. This command is
only effective if Calibration status and either Voltage Zero, Voltage Maximum. Current Zero or Current
Maximum calibration are active. CAL:STAT, CAL:VOLT, CAL:LVOL, CAL:VOLT, CAL:CURR,
CAL:DATA, CAL:ZERO, CAL:SAVE. (See example, Figure B-1.)
SYST:PASS:CEN 1234
If password set to 1234, enables commands requiring password.
CAL:STAT 1
Power supply enters Calibrate status.
CAL:STAT?
Returns ZERO-ZERO indicating power supply in Calibrate status.
CAL:VOLT ZERO
Voltage Zero Calibration selected.
CAL:VOLT MAX
Voltage positive Calibration selected.
CAL:DPOT 1
Output voltage increased by 10 LSB.
CAL:VOLT MIN
Voltage negative Calibration selected.
CAL:DATA -2
Output voltage decreased by 2 LSBs.
CAL:ZERO
Output voltage and current set to zero.
---
* User connects shunt and connects DVM to output.
CAL:CURR ZERO
Current Zero Calibration selected.
CAL:DPOT -1
Output current decreased by 10 LSB.
CAL:CURR MIN
Current negative Calibration selected.
CAL:DPOT 1
Output current increased by 10 LSB.
CAL:CURR MAX
Current positive Calibration selected.
CAL:DATA -1
Output current decreased by 1 LSB.
CAL:SAVE
Calibration values saved.
CAL:STAT 0
Power supply exits Calibrate mode.
CAL:STAT?
Returns 0 indicating power supply not in Calibrate status
---
* User disconnects shunt and DVM.
