How to determine results of different ohm settings on V


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How to determine results of different ohm settings on VOM?

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Downtime2
New User

Jan 16, 2012, 4:19 PM

Post #1 of 3 (1946 views)

How to determine results of different ohm settings on VOM?	Sign In

Hello Everyone,
How to determine results of different ohm settings on VOM?
I seem to have a difficult time converting readings on the different Scale Settings, is there some way to easily remember how to do this?
For instance, while reading a VOM resistance of spark plug wire (length of wire is 18 inches). Got a reading of 1.23 ohms on the 20K setting on meter, what is the resistance in a whole number?
Thanks in Advance,
Downtime2

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jan 16, 2012, 4:35 PM

Post #2 of 3 (1939 views)

Re: How to determine results of different ohm settings on VOM?	Sign In

No, you didn't get a 1 ohm reading on a spark plug wire. it was probably 12,300 ohms. Any good meter will be self ranging so you don't have to figure out which scale to use. With your meter, you need to already know about what to expect to pick the correct range.

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re-tired
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Jan 18, 2012, 9:08 PM

Post #3 of 3 (1872 views)

Re: How to determine results of different ohm settings on VOM?	Sign In

On most standard meters you have a (1)ohm , a 10 ,20 and 100k setting . Yours may vary.With the knob on the 10k setting a full sweep of the needle would be 10k or 10,000 ohms. Each division on the matching scale would be 1k or 1,000 ohms . Same for each setting . Works the same for volts. Remember when changing ranges in ohms you must touch leads together and adjust for zero each time . When testing an unknown reistance start at you highest setting and work down the ranges till you get highest reading with out going off scale . As HT mentioned , an auto rangeing meter will do all this for you.

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