AMETEK ReFlex - Manual (Page 312)

ReFlex Power™ Active Loads
M380056-01 Rev J 7-37
7.6.7 HPAL L
OW
R
ANGE
C
URRENT
C
ALIBRATION
This procedure calibrates the input current for the current range low. Make sure
that the shunt and the DC current meter are connected between the active load
and DC power supply.
This procedure requires maximum voltage 5.0V and maximum current 1.0 Amp.
1. Set the DC input voltage to 5 Volts:
2. Turn on the active load:
INP:STATE 1
3. Set the DAC count to 20% of its full range:
CAL:INP:CURR:COUNTS 16000
4. Wait for the DC current to stabilize. After the current reading is stabilized,
enter the current using following command:
CAL:INP:CURR1
5. Set the DAC count to 80% of its full range:
CAL:INP:CURR:COUNTS 53000
6. Wait for the DC current to stabilize. After the current reading is stabilized,
enter the current using following command:
CAL:INP:CURR2
7. Send the calibration command to calculate the gain and offset of the low
range current calibration:
CAL:INP:CURR:CALC
8. Send the system error query command to make sure calibration was
successful:
SYST:ERR?
9. If there is no error returned at the system error query command then save
the calibration result:
CAL:UNLOCK “6867”
CAL:STORE
CAL:LOCK
10. Reset the unit:
*RST