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Continuity: So Easy to Check, Except When It's Not

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Bill_Jaffa
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Re: Stories versus wires
Bill_Jaffa   4/7/2014 1:19:21 PM
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Sometimes it is both more than OK  and actually a smart thing to use an "uncool" technique; otherwise, you risk the solution being more complicated than the problem!

MeasurementBlues
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Re: Stories versus wires
MeasurementBlues   4/7/2014 1:10:02 PM
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I wrote about the whole thing in some deatil a while ago.

See Multimeter traces home wiring.

Using a multimeter is so uncool. Today, You've need to do the same thing using a phone app as a TDR.

Bill_Jaffa
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Re: Stories versus wires
Bill_Jaffa   4/7/2014 12:50:08 PM
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Sounds like you should go Kickstarter and get some up-front funding to make it into a small prject, then get some distributor of building-wiring products to carry it!

MeasurementBlues
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Stories versus wires
MeasurementBlues   4/7/2014 12:45:02 PM
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"The one-wire continuity problem was one I had faced in the past, when I was helping a friend fixing up a very old two-story house."

Two story, one wire, but I ahve three stories. Does that mean I have two wires? Actually, I have 12 Ethernet lines with eight wires each. To locate and document the connections, I used a DMM after making a test cable that shorted the two middle wires together. Then I just had to run around with the sorting cable to each Ethernet jack and listen for hte beep in the wiring closer where all Ehternet lines come out of the wall.

Bill_Jaffa
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Re: Audible continuity checkers
Bill_Jaffa   4/7/2014 12:26:34 PM
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Good point--as usual, it's a good idea to stop and think first, decide if you need a basic short vs open test, or something a little more sophisticated.

MeasurementBlues
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Audible continuity checkers
MeasurementBlues   4/7/2014 12:14:53 PM
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Those DMMs with audible continuity testers will sound when the resistance measured is below some threshhold, but not always that close to zero ohms. In same cases, you get the beep but the resistance is still too high for things to work.

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