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AC Power Supplies
DAC O
4.6.6
This procedure calibrates the voltage DAC of the power supply.
1. Connect the meter between the output and the output return lead.
2. Set the voltmeter to read the DC voltage.
3. Ensure that no load is connected to the output.
4. Issue clear and reset commands:
5. Set the OVP supervisory to limit 12000
6. Set the OCP supervisory to maximum limit.
7. Set the voltage to zero
8. Set the current to maximum limit
9. DAC range is from 0 to 65535. Therefore set the DAC at the middle of the range
10. Turn the unit on.
11. Set the DC loop off.
12. Program the DAC to 0.5% below the middle range
13. Wait for the DC voltmeter to stabilize. Make an accurate measurement and then
enter the DC voltage using following command. User should enter the voltage
including sign (Ex: For Negative 4.15631 enter –4.15631)
4-50
C
FFSET
ALIBRATION FOR
*CLS
*RST<n>
CAL<n>:OUTP:VOLT:PROT:COUNTS 12000
CAL<n>:OUTP:CURR:PROT:COUNTS 4000
CAL<n>:OUTP:VOLT:COUNTS 0
CAL<n>:OUTP:CURR:COUNTS 4000
CAL<n>:OUTP:DAC:COUNTS 32768
OUTP<n>:STATE 1
CAL<n>:OUTP:DCLOOP OFF
CAL<n>:OUTP:DAC:COUNTS 32456
CAL<n>:OUTP:DAC:POINT1 <value-1>
V
R
OLTAGE
ANGE
ReFlex Power™
L
OW
M380056-01 Rev L
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