Cheap (good) Current clamp/Digital Multimeter for trouble shooting electrical

100 td

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B21TLB (B21, TL421 & BT751) Toyota SDK4 T116 Bobcat
Aug 29, 2015
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ɹǝpunuʍop
For those in the US (or other countries), at ~$35, this is a very handy diagnostic tool if you are chasing any electrical issues.
While I don't have one myself (as I have many other meters and clamps), I have purchased a couple of these for a friend, and an uncle, and am now getting another for my brother.
For me, operation of the selection of the functions and scales isn't ideal, (you'll get used to the sequence of selection of functions) but to have a 100A DC clamp meter and volt meter "all in one" in a nice small package is very handy.
So you can use this to clamp on a wire and check current flow to your glow plugs, or from the alternator/dynamo, as well as use the probes to check voltage at battery/key switch etc, also resistance of contacts in switches etc.
Yes it is also suitable for mains AC voltage.
One thing to note, you need to push the leads into the meter fully (they are quite tight and go in a long way to make proper contact) before using for voltage/resistance etc., also ensure you remove the leads before using the clamp.
The lead tips come with fully shrouded probes, which can be removed for insertion into connectors etc.
So AC/DC Volts & Current, Diode test, resistance and capacitance
And for a few dollars more the 210D model has higher current, temp and frequency if you wish.
Available from many places at varying prices, here is one.
https://www.amazon.com/dp/B06XDH831K/ref=sr_1_4?ie=UTF8&qid=1501379613
Specifications and manual here
http://www.uni-trend.com/productsdetail.aspx?ProductsID=712&ProductsCateId=773&CateId=773
And yes I've put this in Service/Repair/Maintenance forum so that it is read by the masses who have electrical problems, as usually they don't go to classifieds for electrical help.
I have no affiliation with Uni-Trend, I have just purchased their product and found it suitable to my/others needs.
 

100 td

Active member

Equipment
B21TLB (B21, TL421 & BT751) Toyota SDK4 T116 Bobcat
Aug 29, 2015
1,776
8
38
ɹǝpunuʍop
While that one is a the same make and probably a good unit, unfortunately it doesn't measure DC Amps which is intrinsically necessary for tractor use.
The one I previously mentioned is smaller to get into tight spots, but also only has a 17mm jaw, which may have it's limitations in some situations.
 
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dandeman

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BX2230, LA211 FEL, RCK60B Mower, GCK60BX Bagger; Ford 4000, bush hog, blade, etc
Aug 9, 2013
166
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18
Chapel Hill, NC
www.dan-de-man.net
As noted above, in some ads, not so clear and somewhat easy to overlook if they can measure DC current or limited to AC current measurement only..

Tenma clamp on meters are good quality, bang for the buck for clamp on DC current measurement.. I have used this one for years in work on 48 volt DC power plants running telephone systems and server farms. http://www.mcmelectronics.com/product/72-7224?green=E37A6B6A-A984-5244-99A2-9B000CB2E18C

Tenma 72-7224 Manual: http://www.mcmelectronics.com/content/ProductData/Manuals/72-7224.pdf

The clamp on DC current meters use a Hall effect sensor in the clamp magnetic path https://en.wikipedia.org/wiki/Hall_effect_sensor to measure DC current, originally quite expensive when they first came out.

They are still more expensive than the cheaper clamp on AC only current meters that are of a more simple clamp on transformer design..

Check the specs closely before you buy to make sure their clamp on can measure DC current.
 
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