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16-10
Calibration
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
Press MENU, select CAL, then press ENTER. At the CAL: RUN prompt, press
ENTER again. The unit will prompt for the zero calibration point:
2NA ZERO
Set the calibrator voltage to 0V then press ENTER.
The instrument will prompt for the positive full-scale calibration point:
+2NA CAL
Press ENTER. The instrument will prompt for the positive full-scale calibration
current:
+2.000000 NA
Set the calibrator voltage to +2.000000V. Calculate the actual calibration current
from the calibrator voltage and the actual standard resistor value: I = V/R. Adjust
the Model 6487 display to agree with the calculated current, then press ENTER.
The Model 6487 will prompt for the negative full-scale calibration point:
-2NA CAL
Press ENTER. The instrument will prompt for the negative full-scale current:
-2.000000 NA
Set the calibrator output voltage to –2.000000V, then calculate the calibration cur-
rent from the calibrator voltage and standard resistor value: I = V/R. Adjust the
Model 6487 display to agree with the calculated current, then press ENTER to
complete calibration of the present range.
Press EXIT to return to normal display.
Repeat steps 3 through 12 for the 20nA through 2μA ranges using
guide. Be sure to make connections to the correct standard resistor and set the cali-
brator voltages to the correct values.
Model 6487 Reference Manual
Table 16-6
as a
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