AMETEK M130 - Manual (Page 91)

Sorensen Ethernet Option Calibration
M130/M131 Programming Manual 4-9
4.7 C
URRENT
M
EASUREMENT
/R
EADBACK
C
ALIBRATION
STEP DESCRIPTION
1. Program the overvoltage protection to maximum to prevent nuisance trips:
CAL[n]:OUTP:VOLT:PROT:DAC 65535
2.
Program the output voltage to full scale to prevent Constant-Voltage
operation:
CAL[n]:OUTP:VOLT:DAC 65535
3.
Program the output of the first calibration point to approximately 15% of full
scale current by sending the following command string from the computer:
CAL[n]:OUTP:CURR:DAC 6500
4.
Let the output settle and measure the current with the current shunt and the
meter.
5.
Enter the actual current readback corresponding to the DAC value 6500 of
the first calibration point:
CAL[n]:MEAS:CURR:POINT 1
6.
Program the output of the second calibration point to approximately 85% of
full scale current by sending the following command string from the
computer:
CAL[n]:OUTP:CURR:DAC 57500
7.
Let the output settle and measure the current with the current shunt and the
meter.
8.
Enter the actual current readback corresponding to the DAC value 57500 of
the second calibration point:
CAL[n]:MEAS:CURR:POINT 2
9.
Reset the output current to 0 amps.
CAL:OUTP:CURR:DAC 0
10.
Program the supply to calculate the current readback calibration gain and
offset values:
CAL[n]:MEAS:CURR:CALC
11.
Program the supply to unlock the non-volatile memory for calibration value
storage:
CAL[n]:UNLOCK “6867”