Keithley 6485 User Manual

List of Illustrations
1 Getting Started
Figure 1-1 Model 6485 front panel............................................................................ 1-9
Figure 1-2 Model 6485 rear panel .......................................................................... 1-11
Figure 1-3 Model 6487 front panel.......................................................................... 1-13
Figure 1-4 Model 6487 rear panel .......................................................................... 1-16
2 Connections
Figure 2-1 Model 6485 BNC Input connector ........................................................... 2-2
Figure 2-2 Model 6485 maximum input levels.....
..................................................... 2-3
Figure 2-3 Model 6487 triax Input connector ............................................................ 2-3
Figure 2-4 Model 6487 maximum input levels.....
..................................................... 2-4
Figure 2-5 Basic Model 6485 connections................................................................ 2-5
Figure 2-6 Shielding for Model 6485 measurement
s (unguarded) ........................... 2-6
Figure 2-7 Basic Model 6487 current
measurement connections ............................ 2-7
Figure 2-8 Basic Model 6487 ohms connections...................................................... 2-8
Figure 2-9 Shielding for Model 6487 measurement
s (unguarded) ........................... 2-9
Figure 2-10 General purpose test fixture connec
tions to Model 6485 ...................... 2-10
Figure 2-11 General purpose test fixture connec
tions to Model 6487 ...................... 2-11
Figure 2-12 Typical connections for Model 6487 measurements using
the Model 8009 test fixture .................................................................... 2-
11
Figure 2-13 Model 6487 interlock connections ......................................................... 2-13
Figure 2-14 Typical Model 6485 analog output connections .................................... 2-14
Figure 2-15 Typical Model 6487 analog output connections .................................... 2-15
3 Measurements and Sourcing Voltage
Figure 3-1 Connections for Model 6485 current measurements .............................. 3-7
Figure 3-2 Connections for Model 6487 c
urrent measurements .............................. 3-8
Figure 3-3 Connections for Model 6487 ohms
measurements............................... 3-11
7 Remote Operation and Commands
Figure 7-1 Model 6485 IEEE-488 and RS-232 connector locations......................... 7-3
Figure 7-2 Model 6487 IEEE-488 and RS-232 connector
locations ......................... 7-3
B General Measurement Considerations
Figure B-1 Power line ground loops......................................................................... B-2
Figure B-2 Eliminating ground loops ........................................................................ B-3

Keithley 6485 Specifications

General

Model	Keithley 6485
Category	Picoammeter
Input Impedance	>10^14 Ohms
Voltage Burden	<200µV
Accuracy	0.4% of reading
Voltage Source Range	Not Applicable
Voltage Source Resolution	Not Applicable
Voltage Source Accuracy	Not Applicable
Interface	IEEE-488
Power Requirements	100V to 240V AC, 50/60Hz
Dimensions	89 mm high x 214 mm wide x 369 mm deep (3.5 in x 8.4 in x 14.5 in)