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micro DM-100 Digital Multimeter
2. Insert the black test lead plug into the "COM" terminal and the red test lead plug into
the "Ω" terminal.
3. Touch the test probe tips across the circuit or part under test. It is good practice to
disconnect one side of the part under test so the rest of the circuit will not interfere
with the resistance reading.
4. Read the resistance in the display. The display will indicate the proper value with deci-
mal point and symbol.
5. After resistance test, the capacitive circuits must be discharged. This will help protect
against electric shock.
Diode Test
To reduce the risk of electric shock, do not test any diode that has voltage
WARNING
on it.
1. Set the function switch to
2. Press the
3. Insert the black test lead plug into the "COM" terminal and the red test lead plug into
the "Ω" terminal.
4. Touch the test probe tips to the diode or semiconductor junction to test. Note the
meter reading.
5. Reverse the probe polarity by switching probe position. Note this reading.
6. The diode or junction can be evaluated as follows:
• If one reading shows a value and the other reading shows OL, the diode is good.
• If both readings show OL, the device is open.
• If both readings are very small or 0, the device is shorted.
NOTE! The value indicated in the display during the diode check is the forward voltage.
Continuity Check
To reduce risk of electric shock, never measure continuity on circuits or
WARNING
wires that have voltage on them.
1. Set the function switch to
2. Insert the black test lead plug into the "COM" terminal and the red test lead plug into
the "Ω" terminal.
3. Press the
4. Check meter operation by touching probe tips together. An audible signal should
sound.
5. Touch the test probe tips to the circuit or wire to check.
6. If the resistance is less than approximately 150 Ω, an audible signal will sound. The
display will also show the actual resistance.
16
position.
button until the
position.
button until the
symbol appears on display screen.
symbol appears in the display.
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