User manual

2-12 Output Connections Model 6220/6221 User’s Manual
Return to Section 2 topics
A safety shield must be used whenever hazardous voltages (>30Vrms, 42Vpeak)
will be present in the test circuit. Figure 2-10 shows how to make guarded connec-
tions with the use of a safety shield.
Using shielding and guarding together
Figure 2-10 shows connections for a test system that uses a noise shield, a safety
shield, and guarding.
Figure 2-10
Connections for noise shield, safety shield, and guarding
Using a test fixture
In order to faciliate safe operation and optimum performance, a safety test fixture
with a built-in interlock switch must be used. The interlock switch of the test fixture
is to be connected to the “INTERLOCK” of the Model 622x (see page 2-4).
NOTE Guidelines to build a safe, high performance test fixture
are provided in Section 2 of the Reference Manual (see
“Using a test fixture”).
High
Low
DUT
Output
Metal Noise Shield
Safety
Earth
Ground
Metal
Safety
Shield
Chassis
Screw
622x
Guard
Plate
Cable Guard
(black*)
Triax Cable
Triax inner shield connected to Cable Guard
Output Low connected to earth ground
(red*)
(green*)
* Boot color for alligator clip if
using supplied triax cable.
(Earth Ground)