Keithley 2601 Reference Manual

3-16 Return to Section Topics 2600S-901-01 Rev. C / January 2008
Section 3: DUT Test Connections Series 2600 System SourceMeter® Instruments Reference Manual
Safety shield
A safety shield must be used whenever hazardous voltages (>30Vrms, 42Vpeak) will be present in
the test circuit. The safety shield can be metallic or nonmetallic, and must completely surround the
DUT test circuit. A metal safety must be connected to a known safety earth ground and chassis
ground. See the section
"Test fixture" later in this section for important safety information on the
use of a metal or nonmetallic enclosure.
Model 2601/2602 safety shield
The maximum output voltage for a Model 2601/2602 channel is 40V, which is considered a non-
hazardous level. However, using two or more Model 2601/2602 voltage sources in a series
configuration can cause test circuit voltage to exceed 42V. For example, the SMUs of two Model
2601/2602 instruments can be connected in series to apply 80V to a DUT (see
Figure 3-16).
The connections for the test configuration in Figure 3-16 are shown in Figure 3-17. Use #18AWG
wire or larger for connections to safety earth ground and chassis.
NOTE Floating an SMU may also cause test circuit voltage to exceed 42V
(see "Floating a SMU" later in this section).
Figure 3-16
HI
LO
HI
LO
DUT
HI
LO
Metal Safety
Shield
SMU A
2601/2602-1
SMU A
2601/2602-2
Safety
Earth
Ground
40V
40V
80V
Safety shield for hazardous voltage using two 2601/2602 channels (>42V)
Figure 3-17
CHANNEL A
LO GLO HI G G G HI
SS
Model 2601/2602-1
DUT
HILO
CHANNEL A
LO GLO HI G G G HI
SS
Model 2601/2602-2
LO HI
Safety
Earth
Ground
Chassis
Chassis
Screw
Model 2601/2602-1 connections for test circuit shown in Figure 3-16

Keithley 2601 Specifications

General

Brand	Keithley
Model	2601
Category	Measuring Instruments
Language	English