AMETEK ReFlex - Manual (Page 135)

AC Power Supplies ReFlex Power™
4-50 M380056-01 Rev K
4.6.6 DAC O
FFSET
C
ALIBRATION FOR
V
OLTAGE
R
ANGE
L
OW
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:
*CLS
*RST<n>
5. Set the OVP supervisory to limit 12000
CAL<n>:OUTP:VOLT:PROT:COUNTS 12000
6. Set the OCP supervisory to maximum limit.
CAL<n>:OUTP:CURR:PROT:COUNTS 4000
7. Set the voltage to zero
CAL<n>:OUTP:VOLT:COUNTS 0
8. Set the current to maximum limit
CAL<n>:OUTP:CURR:COUNTS 4000
9. DAC range is from 0 to 65535. Therefore set the DAC at the middle of the range
CAL<n>:OUTP:DAC:COUNTS 32768
10. Turn the unit on.
OUTP<n>:STATE 1
11. Set the DC loop off.
CAL<n>:OUTP:DCLOOP OFF
12. Program the DAC to 0.5% below the middle range
CAL<n>:OUTP:DAC:COUNTS 32456
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)
CAL<n>:OUTP:DAC:POINT1 <value-1>