Keithley 6487 Reference Manual page 243

Model 6487 Reference Manual
Figure 16-1
Connections for 20µA to 20mA range calibration
INPUT
MADE IN
U.S.A.
CAT I
ANALOG OUT
!
505V PK
505V PK
505V PK
TRIGGER LINK
INPUT
V-SOURCE OUTPUT
505V PK TO CHASSIS
LO HI INTERLOCK
505V
MAX
Model 6487 Picoammeter
Triax-to-BNC
Adapter
2nA-2μA range calibration
1.
2.
3.
Table 16-5
20µA to 20mA range calibration summary
Model 6487 Range
20μA
200μA
2mA
20mA
* Calibrate zero, positive full-scale, and negative full-scale
for each range. Triax shielding cap used for zero calibra-
tion point for all ranges. See procedure.
Coax Cable
IEEE-488
(CHANGE IEEE ADDRESS
DIGITAL I/O
WITH FRONT PANEL MENU)
RS-232
!
LINE RATING
50, 60Hz
FUSE LINE
50 VA MAX
400mAT 100 VAC
(SB) 120 VAC
200mAT 220 VAC
(SB) 240 VAC
Dual banana-to-BNC
adapter. Connect
Output LO to shield.
Connect the voltage calibrator and the Model 5156 Electrometer Calibration
Standard to the Model 6487 INPUT jack
to the 1GΩ resistance.
Set the calibrator to output volts and make sure the calibrator output is turned on.
Select the Model 6487 2nA range.
Calibrator Currents*
0μA
+20.00000μA
-20.00000μA
0μA
+200.0000μA
-200.0000μA
0mA
+2.000000mA
-2.000000mA
0mA
+20.00000mA
-20.00000mA
DC Current Calibrator
(Figure 16-2). Initially, make connections
Calibration 16-9