Craftsman 28906 Professional Shop Manual page 28

ELECTRICAL SYSTEM
There are two primary reasons to measure
amperage:
,
To check the out-put of a charging system
or battery.
,
To check the performance of a component
that draws a substantial flow of power, typ-
ically a motor or clutch.
Briggs and Stratton sells a DC Shunt that con-
verts amperage into a reading on the millivolt
scale of a DVOM. Briggs and Stratton part #
19359 covers low amperage systems, while part
# 19468 tests higher amperage systems.
See Figure 7.34.
Kohler makes a proprietary Rectifier/Regulator
tester (Kohler Part Number 25 761 20 and the
up-dated version: 25 761 20-S). This tester
works on Kohler regulator / rectifiers and the
company claims it works on similar systems from
other companies. See Figure 7.35.
Instructions are included with the Kohler tool
(TT480-A)
Usage of the DC Shunt tool is detailed in the
1995 and 1999 editions of their Update Seminar
materials.
NOTE: The operating principle is based on
Ohm's Law, as described earlier in this section.
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