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How to use a digital multi-meter(DMM)
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You will need to be familiar with the basics of your
digital multi-meter to successfully test the different
components you will be using in your experiments.
The most basic test is a continuity test using the ohms
scale typically set to RX-1 or Ω.
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Some meters have a chime indicator for continuity tests.
Here we are testing our meter by touching the leads
together, we should have a very low resistance (only the
resistance of the test leads is indicated.
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If we get an “OL” reading something is wrong, OL
stands for “open loop” or infinite resistance, it may be
necessary to check the fuse if you read “OL”.
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Fuse replacement for your meter (61-312/61-314)
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Notice the warning, DE-ENGERIZE CIRCUIT FIRST.
NO SOUND
INDICATES AN
OPEN CIRCUIT
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Note: we have the same
warning!
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We set the dial to “V”
and then use the button
to toggle to “DC”.
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When measuring “AC”,
select the “V” setting and
your meter automatically
defaults to AC voltage.
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Note: same warning
here, DE-ENERGIZE
the circuit before
testing.
Choose the chime/diode
setting and use the button
to toggle to the diode
setting.
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DE-ENERGIZE
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The temperature gauge
adapter utilizes both
the common and voltage
ports for measuring
temperature.
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CURRENT IS
MEASURED IN SERIES.
If you measure current in
series it will blow the fuse
in you meter.
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Measuring frequency
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