Keithley 6487 Reference Manual

Model 6487 Reference Manual Calibration 16-11
Figure 16-2
Connections for 2nA to 2µA range calibration
Table 16-6
2nA to 2µA range calibration summary
Model 6487 range Calibrator voltages Standard resistors
1
Calibration currents
2
2nA 0V
+2.000000V
-2.000000V
1GΩ
1GΩ
1GΩ
0nA
+2nA
-2nA
20nA 0V
+2.000000V
-2.000000V
100MΩ
100MΩ
100MΩ
0nA
+20nA
-20nA
2μA0V
+200.0000V
-200.0000V
100MΩ
100MΩ
100MΩ
0μA
+2μA
-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.
INPUT
Triax Cable
Connect Calibrator to
100MΩ or 1GΩ Resistor
Link Shield and Chassis
120
LINE RATING
50, 60Hz
50 VA MAX
INPUT
(CHANGE IEEE ADDRESS
WITH FRONT PANEL MENU)
IEEE-488
CAT I
TRIGGER LINK
RS-232
MADE IN
U.S .A .
ANALOG OUT
DIGITAL I/O
505V
MAX
V-SOURCE OUTPUT
505V PK TO CHASSIS
LO HI
INTERLOCK
!
!
FUSE LINE
400mAT
(SB)
100 VAC
120 VAC
200mAT
(SB)
220 VAC
240 VAC
505V PK
505V PK
505V PK
Model 6487 Picoammeter
DC Voltage Calibrator
BNC-to-dual
Banana Plug
Adapter
100G
Ω
100M
Ω
10G
Ω
1G
Ω
1nF
100nF
OUTPUT
Connect
Cable
Shield to
Output LO
Low-noise
Coax Cable
Note:
Model 5156 Calibration Standard
!

Keithley 6487 Specifications

General

Type	Picoammeter/Voltage Source
Current Measurement Range	20 fA to 20 mA
Interfaces	GPIB, RS-232
Voltage Burden	< 200 µV
Input Impedance	>10^14 Ω
Power	100 V / 120 V / 220 V / 240 V
Basic Current Measurement Accuracy	0.4%