- Thread starter jordan1
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Alfaman
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Really? Less than 1Ohm? That's getting down to laboratory spec. Do you mean to test for poor earth connections and the like? You will need a good quality multimeter for consistent readings, I wonder if a cheapy from Maplin will do? Fluke 233A or similar from AVO (which I own) might be better, BUT..
I've found lots of bad automotive earth connections over the past 30+ years, very few by using a meter. Most by using my eyes though.
Thanks for that, I need one to test pulse coils resistance etc. What would you suggest as I'm sure you know far more than I. I need something as stated but not too expensive. The one I have is ok for continuity but for precise resistance tests not a lot of use.
madkayaker
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Bit OTT for my needs.
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madkayaker
Pro sparkey Pro Welder
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You said you wanted a good one! I just use a normal fluke or RS meter for my use as that's what I have at work but simple stuff really on landrovers
500e
Always buy fire insurance a flood is a hard start
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Do you want Digital or Analogue you will find a fair few AVO 8 about cheap a good analogue unit at a price you can afford then if it is really important you could send back to AVO
There are also AVO M801 on Ebay I expect, the thing with AVO is they are repairable \ calibrateable if the reading is critical
Fluke is also Good & has the same things to recommend them
Have an AVO 8 Mk 3 I bought when an apprentice 50 years ago only had one repair in that time + had the battery mod used to have 2 batteries the mod got rid of one which was no longer obtainable (all ways check for this mod), the down side is it is big, & may be no longer serviceable. The AVO 801 is a small digital unit, Fluke have a huge range I have a Mod 87 which is oldish but good.
The thing with cheap digital is the sample rates are slow not a problem for resistance really but can be a pain for fluctuating voltages + if there is RF around all sorts of strange readings can occur
http://glanfordelectronics.com/avo.html
There are also AVO M801 on Ebay I expect, the thing with AVO is they are repairable \ calibrateable if the reading is critical
Fluke is also Good & has the same things to recommend them
Have an AVO 8 Mk 3 I bought when an apprentice 50 years ago only had one repair in that time + had the battery mod used to have 2 batteries the mod got rid of one which was no longer obtainable (all ways check for this mod), the down side is it is big, & may be no longer serviceable. The AVO 801 is a small digital unit, Fluke have a huge range I have a Mod 87 which is oldish but good.
The thing with cheap digital is the sample rates are slow not a problem for resistance really but can be a pain for fluctuating voltages + if there is RF around all sorts of strange readings can occur
http://glanfordelectronics.com/avo.html
This will do everything you need on automotive :-
http://www.ebay.co.uk/itm/180740153745?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649
Although for some reason the description in the auction doesn't mention resistance, it does in fact measure upto 40 meg ohm, the lowest range is 400 ohm with a resolution of 0.1 ohm. Have a look at the PDF, downloadable from the auction info.
Voltcraft is good stuff.
http://www.ebay.co.uk/itm/180740153745?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649
Although for some reason the description in the auction doesn't mention resistance, it does in fact measure upto 40 meg ohm, the lowest range is 400 ohm with a resolution of 0.1 ohm. Have a look at the PDF, downloadable from the auction info.
Voltcraft is good stuff.
Hello Jordan,
do it another way, measure the current passed through what you want to test, and calculate. You'll obviously need to measure the applied voltage also; R = V/I, a basic multimeter will give reasonable figures doing it this way. I also check voltage drop across doubtful connections when fault finding rather than using resistance measurement with the cheap meter I use. If you do want to do this make sure the circuit is on when doing the check or you'll get a false reading if there is no current flow.
Alec
do it another way, measure the current passed through what you want to test, and calculate. You'll obviously need to measure the applied voltage also; R = V/I, a basic multimeter will give reasonable figures doing it this way. I also check voltage drop across doubtful connections when fault finding rather than using resistance measurement with the cheap meter I use. If you do want to do this make sure the circuit is on when doing the check or you'll get a false reading if there is no current flow.
Alec
ajlelectronics
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That's the ideal way to find poor earths etc. Just measure voltage drop. As an example, measure from battery -Ve to the engine block while cranking. Any voltage displayed tells you that you earths need sorting.
I got one of these http://www.ebay.co.uk/itm/AC-DC-Pro...iagnostic_Tools_Equipment&hash=item3a76405c3e
I don't know if it has what you require
I don't know if it has what you require
