CAPACITANCE and TEMPERATURE
DIODE TEST
1.
Plug the adapter into the terminal.
2.
Insert the the capacitor into the adapter.
3.
If the capacitance is less than 4nF press zero
(capacitance) button to zero the residual capacitance.
4.
Read the capacitance from the LCD.
TEMPERATURE
1.
Plug the adapter into the terminal.
2.
Insert the K-type thermal couple into the adapter
3.
Read the temperature from the LCD.
ALTERNATOR TEST
ALTERNATOR
SETUP
1.
Select DC Volts on the DM-46.
2.
Start the engine.
3.
Place the Volt leads to the red (+) positive and black (-) battery
terminals.
4.
Allow voltage to stabilize. The reading should be from 13.0 to 15
Volts DC.
5.
Turn on all accessories including the headlights.
6.
The reading should be from 12.8 to 15 Volts DC. If the reading
is low the alternator is not charging. If the reading is high the
alternator is over charging and could damage the battery.
7.
Switch the DM-46 to DC 200 Amps.
8.
Clamp the DM-46 around the positive alternator conductor leading
to the positive terminal of the battery (See illustration above).
9.
Make sure the small arrow inside the clamp is pointing in the
direction of the current towards the battery. Also make sure the
DM-46 is clear of any moving belts, fan blades or anything that
might damage the meter.
10.
If output is lower in DC Amps than the accessories would draw
then the alternator may not be charging. Repeat step 6 to see if
the voltage has droped.
11.
Select the AC 40 Amp on the DM-46.
12.
Clamp the DM-46 as shown above.
13.
With the engine still running and all accessories on, the current
ripple should be less than 10 Amps AC. If more, the diodes are
bad.
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