Model 30 Pavement Router Manual
How to use a Multimeter
Chapter 7
©2018 by Crafco, Inc. All Rights Reserved………………..………………………………..….…How to Use a Multimeter 7-1
7.0 How to Use a Multimeter
The Model 30 Pavement Router uses 12-volt direct current (DC) to power the engine, and actuator
motor. The DC power is from a 12-volt battery.
12-volt DC power has little danger of electrical shock. Care must still be taken when dealing with
DC power systems because it is capable of producing large amounts of current.
7.1 Checking DC Voltage with a Multimeter
Connect the probes to the meter.
Set the range to a position that includes 12-volts or higher.
Touch the red probe to the positive side of accessory and black probe to ground. If the item you
are checking has a ground wire attached then use that ground or you can use the grounding stud
on the engine channel assembly.
7.2 Checking Resistance (Ohms)
Connect probes to the meter (See
Figure 7.1 Standard Multimeter
Note:
When checking Ohms the circuit cannot be completed. This means one end of the wire will
need to be disconnected.
7.3 Checking Wire Continuity
Set the meter to “Audible Continuity”.
Now touch the probe to each end of the wire in question. The meter will read “0” on the screen and
make an audible beep if the wire has continuity from end to end.
