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SEMICONDUCTORS. How to use a digital multi-meter(DMM). SEMICONDUCTORS. 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.
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SEMICONDUCTORS How to use a digital multi-meter(DMM)
SEMICONDUCTORS • 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.
SEMICONDUCTORS • 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.
SEMICONDUCTORS • 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”.
SEMICONDUCTORS • Fuse replacement for your meter (61-312/61-314)
SEMICONDUCTORS • Notice the warning, DE-ENGERIZE CIRCUIT FIRST. NO SOUND INDICATES AN OPEN CIRCUIT
SEMICONDUCTORS • Note: we have the same warning!
SEMICONDUCTORS • We set the dial to “V” and then use the button to toggle to “DC”.
SEMICONDUCTORS • When measuring “AC”, select the “V” setting and your meter automatically defaults to AC voltage.
SEMICONDUCTORS • 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.
SEMICONDUCTORS • DE-ENERGIZE
SEMICONDUCTORS • The temperature gauge adapter utilizes both the common and voltage ports for measuring temperature.
SEMICONDUCTORS • CURRENT IS MEASURED IN SERIES. • If you measure current in series it will blow the fuse in you meter.
SEMICONDUCTORS • Measuring frequency