Crane Snack Eenter I, Troubleshooting & Repair Manual

Page: 22 / 66

Snack - Based Troubleshooting and Repair Guide
1670065 Page 18 of 54 September, 2002
Measuring Resistance
The resistance measuring circuit in your meter compares the voltage gained through a known
resistance (internal) with the voltage developed across an unknown resistance.
4. Remove all power from the circuit under test and discharge all capacitors.
5. Turn the selector to Ohms (
Ω
).
Familiarize yourself with the display by touching the test leads together (short circuit). The dis-
play should show “0”. Separate the leads to simulate an open circuit. The display may show
∞
(infinite), flash a high reading, or other. The instructions for your meter should tell you what to
look for.
CAUTION:
Never connect the test leads to a source of voltage while the selector is set to
Ohms (
Ω
). Otherwise, damage to your multimeter could result.
6. Touch the test leads across the circuit you want to measure, or remove one of the leads of
the component you want to measure from its circuit and touch the test leads across the
component. The resistance value appears.
If you are measuring resistance of about 1
Ω
or more, the display might take a few sec-
onds to stabilize. This is normal.
NOTE:
As with the voltage range, use the measuring units that appear on the display to determine
the current resistance range. If only
Ω
appears, the values of the measurements are in
Ohms. If K and
Ω
appear, the meter is measuring kil
Ω
(1 k
Ω
= 1000 Ohms). If M and
Ω
appear, the meter is measuring MegOhms (1 MegOhm = 1,000,000 Ohms).