2-26 Calibration Model 2500 Service Manual
1. Connect the calibrator to the Model 2500 INPUT CHANNEL 1 jack, as shown in
Figure 2-3.
2. Select the calibrator passive V/R amps function. Set the output current to
1.90000nA, and turn on the calibrator output.
3. Send the following command to select the channel 1 2nA range:
:SENS1:CURR:RANG 2e-9
4. Send the following command to calibrate the positive full-range current point:
:CAL:PROT:SENS1 1.9e-9
5. Set the calibrator current output to 0nA.
6. Send the following command to calibrate the zero current point:
:CAL:PROT:SENS1 0
7. Set the calibrator current to -1.90000nA.
8. Send the following command to calibrate the negative full-range current point:
:CAL:PROT:SENS1 -1.9e-9
9. Repeat steps 3 through 8 for the 20nA to 20mA ranges using Table 2-10 as a guide.
Be sure to:
• Select the appropriate range using the :SENS1:CURR:RANG <Range>
command.
• Send the appropriate calibration current values with the :CAL:PROT:SENS1
<Current> command.
• Be sure to use the calibrator active amps mode for the 20mA range.
Step 7. Channel 2 current calibration
Follow these steps to calibrate channel 2 current measurements. Table 2-11 summarizes
channel 2 calibration currents and commands.
1. Connect the calibrator to the Model 2500 INPUT CHANNEL 2 jack, as shown in
Figure 2-4.
2. Select the calibrator passive V/R amps function. Set the output current to
1.90000nA, and turn on the calibrator output.
3. Send the following command to select the channel 2 2nA range:
:SENS2:CURR:RANG 2e-9
4. Send the following command to calibrate the positive full-range current point:
:CAL:PROT:SENS2 1.9e-9
5. Set the calibrator current to 0nA.
6. Send the following command to calibrate the zero current point:
:CAL:PROT:SENS2 0
7. Set the calibrator current to -1.90000nA.
8. Send the following command to calibrate the negative full-range current point:
:CAL:PROT:SENS2 -1.9e-9
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