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Old 03-24-2008, 10:49 AM   #1
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Checking audio cable for short?


I have a MU118 Multimeter, see pic below

http://coolstuff4u.zoovy.com/product...ontinuity.html

I am trying to follow the manual to test an audio cable for shorts and I am reading under the "Diode Measurement and Continuity Test" instructions to test for the short but I think something is not right here. First of all, am I looking in the right place for instructions or should I be looking at maybe the "Capacitance Measurements" instructions?

If the Continuity test is really what I need then the instructions read like this:

Set the Function switch to the [there is a symbol of an arrow pointing downwards with a line across the tip] range and connect the test leads, if the the the resistance is lower than approx 30 ohms, Buzzer sounds. Thing is, I use a known non-working audio cable and still no sound, help?

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Old 03-24-2008, 11:18 AM   #2
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Checking audio cable for short?


All you need to do is touch the leads together and the buzzer should sound. That way you know the setting is right. Are you sure the leads are plugged into COM and V/Ohm? Then set the selector switch to the lowest ohm setting.

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Old 03-24-2008, 11:57 AM   #3
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Checking audio cable for short?


Yes, all of a sudden I am hearing the buzzing now, problem is, the buzzing is sometimes faint and loud at other times when I am moving the plugs around, I don't feel confident that the buzzing is giving me an accurate reading because maybe while moving the plugs at each end then the breaks if any in the wiring is cuaing the buzz to be faint? How can someone know for sure if there is an audio cable is defective-free?
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Old 03-24-2008, 02:32 PM   #4
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Checking audio cable for short?


The test for continuity is dependent on the battery quality too. Change the batteries in the meter if you are having problems.
Also, the contacts for the leads- make sure they are clean both at the tips and also at the plugs on the other end.
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