Keithley 6482 - Page 278

6482-901-01 Rev. A / August 2012 Return to Section Topics 17-23
Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual Section 17: Calibration
10. Press the ENTER key. The instrument will prompt for the zero current:
I (0)
1
= +0.000000 nA
Use , , , , ENTER or EXIT.
11. Set the Model 6430 current to 0 nA and press the ENTER key. The instrument will prompt for
the negative full-range current:
I(-FS)
1
= -2.000000 nA
Use , , , , ENTER or EXIT.
12. Set the Model 6430 current to -1.90000 nA.
13. Adjust the displayed current to match the Model 6430 current, and then press the ENTER key
to complete calibration of the present range.
14. Press the EXIT key to return to normal display.
15. Repeat steps 3 through 14 for the 20 nA to 2 μA ranges, using Table 17-9 as a guide. Be sure
to set the Model 6482 to the correct range using the RANGE  and  keys, and use the
corresponding Model 6430 currents for each range.
16. Connect the Model 5700A to the Model 6482 channel 1 INPUT connector, as shown in
Figure 17-10.
17. Select the Model 5700A V/R amperes function and set the Model 5700A output to
+19.0000 μA, and then turn on the output.
18. Press the Model 6482 MSR1 key, and then set channel 1 to the 20 μA current range using the
RANGE  and  keys (the 20 μA range has the following format: +00.0000 μA).
19. Press the MENU key, select CAL, and then press the ENTER key.
20. Select EXECUTE, and then press the ENTER key to enter the CAL EXECUTION menu.
Table 17-9
Current calibration values
Connections
Current
range
Model 6430
calibration currents Model 5700A
calibration currents
Figure 17-9 2 nA +1.90000 nA
0.0000 nA
-1.90000 nA
-
-
-
20 nA +19.0000 nA
0.0000 nA
-19.0000 nA
-
-
-
200 nA +190.000 nA
0.000 nA
-190.000 nA
-
-
-
2 μA +1.90000 μA
0.00000 μA
-1.90000 μA
-
-
-
Figure 17-10
20 μA-
-
-
+19.0000 μA
0.0000 μA
-19.0000 μA
200 μA-
-
-
+190.000 μA
0.000 μA
-190.000 μA
2 mA -
-
-
+1.90000 mA
0.00000 mA
-1.90000 mA
20 mA -
-
-
+19.0000 mA
0.0000 mA
-19.0000 mA