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3.5 Connecting a Load to the 4176
The first step in using the ohmmeter is to connect to a load. Valhalla Scientific, Inc.
offers a number of different test leads that can be used with the Model 4176 and other
Valhalla ohmmeter models (see chapter 5 for a list of available test leads).
All ohmmeter test leads are composed of a pair of leads, both terminated in a multi-
stacking dual banana plug. It is important to notice the position of the ground maker on
the plug. Marked side of each banana jack is connected to the
current
terminals (see
table 9).
Table 9 –Connecting test leads to the ohmmeter
Lead 1
Connect between SENSE HI and SOURCE HI, with the ground maker on the source side.
Lead 2
Connect between SENSE LO and SOURCE LO, with the ground maker on the source side.
This configuration ensures that current source is carried in the largest conductor of the
cable, and that the sense input is shielded.
The opposite end of the lead may vary in style of termination. On the following page you
will find a description of the three most common terminations used.
