AMETEK ReFlex - Manual (Page 313)

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<n>:STATE 1
2. Set the conductance count to 0x33333:
CAL<n>: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<n>:INP:VOLT 1 <value-1>
4. Set the input DC voltage to 54 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>