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Post by swordfish on Nov 14, 2019 6:25:55 GMT -5
2011 kymco Agility 50. Primary coil resistance spec is 0.1-1.0 ohms. Using my digital meter, my coil readings move all around from 0.1 to 0.4 ohms. The coil is mounted in a workbench vise and connections are made with alligator clips so there is no movement of the coil or the test equipment. Why does the meter not hold steady on one resistance number? Is this a problem?
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Rune 75
Scoot Enthusiast
Posts: 441
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Post by Rune 75 on Nov 14, 2019 8:39:55 GMT -5
If you clamp the two alligator clips together, do you get a steady 0 ohm reading ?
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Post by swordfish on Nov 14, 2019 9:22:02 GMT -5
I just checked that. When I connect the alligator clips together the readings move around between 0.0 and 0.3.
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Post by scooterted on Nov 14, 2019 9:26:08 GMT -5
Might be your meter. Is it a cheap meter?
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Rune 75
Scoot Enthusiast
Posts: 441
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Post by Rune 75 on Nov 14, 2019 9:48:39 GMT -5
I just checked that. When I connect the alligator clips together the readings move around between 0.0 and 0.3. Well there's your answer. |
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Post by swordfish on Nov 14, 2019 11:14:26 GMT -5
Yes. It is a cheap Radio Shack meter I've used for years. Guess I need a better meter. Thanks for your responses.
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Post by scooterted on Nov 14, 2019 11:40:40 GMT -5
Honestly with that small of a variance i wouldnt worry about it, unless lives are on the line.
I stick with cheap meters, ive mistakenly burned out so many of them that im scared to invest in an expensive one.
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Post by swordfish on Nov 14, 2019 18:19:43 GMT -5
I'm not familiar with this sort of meter malfunction. Does this wandering reading between 0.1 and 0.4 likely indicate that my resistance lies within the spec of 0.1 and 1.0 ?
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Rune 75
Scoot Enthusiast
Posts: 441
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Post by Rune 75 on Nov 14, 2019 18:35:27 GMT -5
I'm not familiar with this sort of meter malfunction. Does this wandering reading between 0.1 and 0.4 likely indicate that my resistance lies within the spec of 0.1 and 1.0 ? Somewhere between 0.1 and 0.4 most likely. Based on it showing 0.0 - 0.3 when it's supposed to be 0. |
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Post by FrankenMech on Nov 14, 2019 23:22:22 GMT -5
Check the battery in your meter.
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Post by christopher on Nov 15, 2019 6:28:08 GMT -5
You are trying to measure a very low resistance, that can be hard with any meter. You can buy meters just to measure lower resistance parts, I wouldn’t get one for this case. As suggested check the battery. If you are near anything such as a fluorescent lamp it could just be electrical noise. Clamp your meter leads together and move to a different spot to see if the variation stops. I have a more expensive Fluke digital meter that has a setting for resistances of less than 50 ohms. You know the coil isn’t an open with the reading your getting Is there a specific reason you are measuring it?
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Post by cagiva4ever on Nov 15, 2019 6:40:10 GMT -5
yeah most likely poor Battery in Multimeter, or component failure happening on pcb.
i just recently had bad wire joint inside test lead on my cheap commonly sold DT-830B, caused all sorta Flickering on values...
but about your Coil, are you talking about Primary coil in Stator ? the primary coil that produces Sparg energy before it goes into cdi and HT-coil (ht-coil can also be named as Secondary coil)
without looking into Kymco agility W.S.M , is it DC-cdi or AC-cdi ?
on AC-cdi the Primary Coil at Stator commonly is about 350~700 Ohms in Generally speaking. Pick-Up coil 70~200 Ohms generally speaking. HT-coil 900~3600 Ohms generally speaking.
so i Wonder your stated Primary coil value......Most Kymco's thow are DC-cdi......hence mentioned AC-cdi stator etc reference values dont apply...
What is your Whole problem issue on the Kymco ?
post up W.S.M web link data or other (copy paste) to your model, saves us from browsing looking searching...i might have them on other computers....
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Post by swordfish on Nov 15, 2019 11:47:59 GMT -5
Check the battery in your meter. Batteries were pretty low so I replaced them. Same readings. |
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Post by swordfish on Nov 15, 2019 11:50:40 GMT -5
" You know the coil isn’t an open with the reading your getting Is there a specific reason you are measuring it?" Scooter would not start. Although I have spark, I just thought I'd check components and ignition coil is easy enough to test. |
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Post by swordfish on Nov 15, 2019 11:57:47 GMT -5
"You are trying to measure a very low resistance, that can be hard with any meter. You can buy meters just to measure lower resistance parts, I wouldn’t get one for this case. As suggested check the battery. If you are near anything such as a fluorescent lamp it could just be electrical noise. Clamp your meter leads together and move to a different spot to see if the variation stops. I have a more expensive Fluke digital meter that has a setting for resistances of less than 50 ohms. You know the coil isn’t an open with the reading your getting Is there a specific reason you are measuring it?" Since all other meter functions that I use seem to be working properly, I'm going with the "You are trying to measure a very low resistance, that can be hard with any meter" explanation. |
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