AMETEK ReFlex - Manual (Page 314)

ReFlex Power™ Active Loads
M380056-01 Rev J 7-39
7.6.9 HPAL V
OLTAGE
C
ALIBRATION
– P
ART
II
OF
V
This procedure calibrates the voltage for voltage gain 4 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 109V and maximum current 6.0
Amps.
1. Turn the active load on:
INP<n>:STATE 1
2. Set the conductance count to 0xCCCC:
CAL<n>:INP:COND:COUNTS 0xCCCC
3. Set the input DC voltage to 27 Volts. After the input DC voltage stabilizes
enter the first exact voltage:
CAL<n>:INP:VOLT 1 <value-1>
4. Set the input DC voltage to 109 Volts. After the input DC voltage
stabilizes enter the second exact voltage:
CAL<n>:INP:VOLT 2 <value-2>
5. Send the calibration command to calculate the gain and offset:
CAL<n>: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<n>:UNLOCK “6867”
CAL<n>:STORE
CAL<n>:LOCK
8. Reset the unit
*RST<n>