RESISTANCE MEASUREMENT
1.
Set the rotary switch to
Ω.
2.
Insert the test leads into the input jack.
3.
Connect the test probes of the test leads to the two ends
of the resistor or circuit to be measured.
4.
Read the measured value from the LCD.
CONTINUITY TEST
WARNING:
Before taking any in-circuit resistance
measurement, remove power from the circuit being tested and
discharge all the capacitors.
1.
Turn the rotary switch to
Ω
position and move the sliding
switch to AC position.
2.
lnsert the test leads into the input jack.
3.
Connect the test probes of the test leads to the
two
ends
of the resistor or circuit to be measured.
4.
Read the measured value from the LCD.
5.
lf the resistance is lower than 10
Ω
, a beeping sound
will be
heard.
CHARGING SYSTEM TESTS
The following section shows what you can do
with the DM-46 in testing your charging system
State of Charge
1.
Select DC Volts on the DM-46.
2.
Place the Volt leads to the red (+) positive and black (-) battery
terminals.
3.
If the Volts are less than 12.5 Volts the battery needs charging
.
Amp Draw Check
4.
Turn off ignition and all accessories.
5.
Select DC 40 Amps on the DM-46.
6.
Zero the DM-46 by pressing the yellow button.
7.
Clamp the DM-46 around the positive (+) battery cable . Make
sure it is clamped around all wires.
8.
If the display is above 2 Amps there is probably a draw upon
the battery by the electrical system. This will drain the battery.
Isolate and follow a suspected circuit and repeat reading until
the problem is found. Consider a negligible drain with an on
board computer.
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