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Super Shot 60 Diesel Melter Part Manual
Chapter 7 How to Use a Multimeter
©2016 by Crafco, Inc. All Rights Reserved
………………..…………………………………..….…How to Use a Multimeter 7-1
7.0 How to Use a Multimeter
Melters use 12-volt direct current (DC) to power the burner, hydraulic valves, and trigger on electric
wand. The DC power is from a 12-volt battery.
The electric hose and wand uses 24-volt 3-phase alternating current (AC). The AC power is from
the generator which hangs under the radiator. This system has no reference to ground so there is
no possibility of electrical shock unless you are between 2 of the phases. NOTE: ONLY CHECK
AMPERAGE ON A HOSE WITH A CLAMP-ON AMP METER. ( See
Figure 7.2 Clamp
– On Amp
Meter/Multimeter )
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 a non-painted
surface on the frame.
7.2 Checking AC Voltage with Multimeter
Connect the probes to the meter (See Figure 7.1 Standard Multimeter ).
Set the range to a position that includes 24-volts or higher.
There are three steps to test the generator voltage. All 3 values should be in the range of 24-30
volts AC.
• Touch red probe to the white wire of the generator and the black probe to the green wire of
the generator.
• Next move black probe to black wire.
• Then move red probe to green wire.
7.3 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.
7.3.1 How to Check 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.
7.3.2 How to Check RTD Sensor
Set dial to Ohms
Ω. If your meter has different ranges set to 2K or 2000 ohm range.
Touch one probe to each screw or wire of the sensor. The meter will read X.XX if in the 2K range
or XXX.X if in the 2000 range.