Ametek SFA Series Ethernet Programming Manuel d'utilisateur télécharger pdf (Page 141)

SG Series Programming Calibration

M550129-03 Rev K

7-7

7.6

CURRENT PROGRAMMING CALIBRATION

(ETHERNET)

Preparation:

1. Power down the Unit Under Test (UUT) and remove the input power for

safety.

2. Allow 5 minutes for the energy in the output to bleed down to a safe level.

3. Attach the precision shunt between the power supply’s output terminals.

4. Attach the voltmeter across the shunt.

5. Apply input power and power up the UUT.

6. After the UUT has initialized, begin the calibration procedure.

STEP DESCRIPTION

1. Issue a *CLS command.

2. Issue a *RST command.

3. Program the overvoltage protection to maximum to prevent nuisance trips:

CAL:OUTP:VOLT:PROT:DAC 65535

4. Program the output voltage to full scale to prevent Constant-Voltage

operation:

CAL:OUTP:VOLT:DAC 65535

5. Program the output of the first calibration point by sending the following

command string from the computer:

CAL:OUTP:CURR:DAC 3275

6. Let the output settle and measure the output current with the current shunt

and the high precision voltmeter; this is value 1.

7. Enter the actual output current of the first calibration point:

CAL:OUTP:CURR:FIVEPOINT 1 <value 1>

8. Program the output of the second calibration point by sending the following

command string from the computer:

CAL:OUTP:CURR:DAC 19000

9. Let the output settle and measure the output current with the current shunt

and the high precision voltmeter; this is value 2.

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Ametek SFA Series Ethernet Programming Manuel d'utilisateur Page 141