Keithley SourceMeter 2600 Series Reference Manual page 127

Series 2600 System SourceMeters Reference Manual
The metal noise shield surrounds the test circuit and should be connected to SMU
LO (as shown in
screw on the rear panel of the Series 2600.
Figure 3-10
Noise shield
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
later in this section for important safety information on the use of a metal or non-
metallic 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
The connections for the test configuration in
12. Use #18AWG wire or larger for connections to safety earth ground and chas-
sis.
Figure 3-10), and can also be connected to the chassis ground
NOTE Floating an SMU may also cause test circuit
voltage to exceed 42V (see
later in this section).
Return to Section 3 topics
DUT Test Connections 3-11
Figure 3-11).
Figure 3-11 are shown in
"Floating an
2600S-901-01 Rev. A / May 2006
"Test fixture"
Figure 3-
SMU"