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ReFlex Power™
OUTPUT CURRENT PARAMETER CALIBRATION
6.6.5
The following procedure calibrates parameters associated with the output current:
programming current, readback current, overcurrent protection (OCP), and readback of
local current. Output current calibration is performed with the unit operating in current-
mode and with the output short-circuited through a current shunt. The current is
determined by measuring the burden voltage and calculating the corresponding current.
1. Connect a current shunt across the output terminals, and connect the external
2. Issue clear and reset commands:
3. Set the OVP supervisory to non-tracking and at maximum range:
4. Set the OCP supervisory to non-tracking and at maximum range:
5. Turn on the output:
6. Set the output voltage to full-scale:
7. Program the output current to the first value near 5% of full-scale,
8. Measure the output current with the external shunt. Enter this as
9. Program the output current to the second value near 27.5% of full-scale,
M380056-01 Rev L
*RST[n]
voltmeter to measure the burden voltage of the shunt.
*CLS[n]
*RST[n]
CAL[n]:OUTP:VOLT:PROT:COUNTS 4095
CAL[n]:OUTP:CURR:PROT:COUNTS 4095
OUTP[n]:ISOL on
OUTP[n]:SENS on
OUTP[n]:STAT on
CAL[n]:OUTP:VOLT:COUNTS 49152
(count = 32768*0.04611 =1511):
CAL[n]:OUTP:CURR:COUNTS 1511
value-1 with the following command:
CAL[n]:OUTP:CURR:FIVEPOINT 1 <value-1>
DC Power Supplies
6-69
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