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8 hpal voltage calibration – part i of v, Hpal – AMETEK ReFlex User Manual

Page 313

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Active Loads

ReFlex Power™

7-38

M380056-01 Rev J

7.6.8

HPAL

V

OLTAGE

C

ALIBRATION

P

ART

I

OF

V

This procedure calibrates the voltage for voltage gain 8 and current range
high. Make sure that the shunt and the DC voltmeter are connected
between the positive and negative lead of the active load. Also connect the
sense positive-to-positive lead and sense negative-to-negative lead.

This procedure requires maximum voltage 54V and maximum current
11Amps.

1. Turn the active load on:

INP:STATE 1

2. Set the conductance count to 0x33333:

CAL:INP:COND:COUNTS 0x33333

3. Set the input DC voltage to 13 Volts. After the input DC voltage

stabilizes enter the first exact voltage:

CAL:INP:VOLT 1

4. Set the input DC voltage to 54 Volts. After the input DC voltage

stabilizes enter the second exact voltage:

CAL:INP:VOLT 2

5. Send the calibration command to calculate the gain and offset:

CAL:MEAS:OFFSET:CALC

6. Send the system error query command to make sure calibration was

successful:

SYST:ERR?

7. If there is no error returned at the system error query command then

save the calibration result as follows:

CAL:UNLOCK “6867”

CAL:STORE

CAL:LOCK

8. Reset the unit

*RST

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