Keithley 6487 Reference Manual page 245

Model 6487 Reference Manual
Table 16-6
2nA to 2µA range calibration summary
Model 6487 range
2nA
20nA
2μA
1. 1
Nominal resistance values.
2
2. Nominal currents. Calculate actual currents from calibrator voltage and actual standard resistor value: I = V/R. Calibrate zero,
positive full-scale, and negative full-scale for each range.
Figure 16-2
Connections for 2nA to 2µA range calibration
Model 6487 Picoammeter
MADE IN
U.S.A.
CAT I
ANALOG OUT
!
505V PK
505V PK
505V PK
INPUT TRIGGER LINK
V-SOURCE OUTPUT
505V PK TO CHASSIS
LO HI INTERLOCK
505V
MAX
INPUT
Triax Cable
Calibrator voltages
0V
+2.000000V
-2.000000V
0V
+2.000000V
-2.000000V
0V
+200.0000V
-200.0000V
BNC-to-dual
Banana Plug
Adapter
IEEE-488
(CHANGE IEEE ADDRESS
DIGITAL I/O
WITH FRONT PANEL MENU)
RS-232
Connect
!
LINE RATING
50, 60Hz Cable
FUSE LINE
50 VA MAX
400mAT 100 VAC
(SB) 120 VAC
200mAT 220 VAC
(SB) 240 VAC
Shield to
Output LO
100GΩ
OUTPUT
1nF
!
100nF
Model 5156 Calibration Standard
Standard resistors
1GΩ
1GΩ
1GΩ
100MΩ
100MΩ
100MΩ
100MΩ
100MΩ
100MΩ
DC Voltage Calibrator
Low-noise
Coax Cable
10GΩ
Note:
Connect Calibrator to
100MΩ or 1GΩ Resistor
1GΩ
Link Shield and Chassis
100MΩ
Calibration
1
Calibration currents
0nA
+2nA
-2nA
0nA
+20nA
-20nA
0μA
+2μA
-2μA
16-11
2