Model 6220/6221 Reference Manual Output Connections 2-5
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Output configurations
There are four configurations that can be used for current source output:
• Triax inner shield is connected to Output Low, which is connected to Earth
Ground (see Figure 2-4A).
• Triax inner shield is connected to Cable Guard and Output Low is con-
nected to Earth Ground (see Figure 2-5A).
• Triax inner shield is connected to Output Low, which is disconnected from
Earth Ground (Floating) (see Figure 2-4B). This is the default setting.
• Triax inner shield is connected to Cable Guard. Output Low is accessed at
the LO banana jack and is disconnected from Earth Ground (Floating) (see
Figure 2-5B).
Using the Model 622x with the triax inner shield connected to Output Low makes it
compatible with the Keithley Model 220 current source.
WARNING To prevent electric shock and/or damage to the Model 622x, DO
NOT exceed the maximum (Max) voltage levels indicated in
Figure 2-4 and Figure 2-5.
CAUTION To prevent damage to internal fuses of the Model 622x, current
from output low to earth ground must be limited to 1A. Use a
fuse or other current limiting device in the external test circuit.
One internal fuse is located between the Triax Output Low and
banana jack LO. The other internal fuse is located between
Triax Output Low and earth ground.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com
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