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Tractor Talk Discussion Board

Re: Digital meter or not...?


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Posted by Janicholson on August 19, 2021 at 17:53:27 from (24.240.46.228):

In Reply to: Digital meter or not...? posted by banjoman09 on August 19, 2021 at 17:30:15:

Better is a meter that can average 3 or 4 seconds of input to arrive at a real average instead of a single sample taken in about a millisecond. The meter you have is good for the normal, good quality accurate stable source. The old vehicles and tractors we work on are electrically noisy. meaning that at at any one millisecond the actual voltage may be 50, 121, 17, or 7. Assuming it charges. The ignition system, voltage regulator points, and generator brushes all spark and arc. each moment the instantaneous voltage can be anywhere. So There are three possible solutions #1 A cheap analog VOM with a needle and scale (18 bucks or so) they rely on the needle's inertia to stay put averaging the garbage in the wires. They are not critical level accuracy. The second is a Quality analog VOM from Simpson, Triplett I have a 3030, Gardner Bender. these can cost 175+ used. They are as accurate as any disgital, but ease of use requires more thinking. The third is a 100+ dollar digital with auto ranging and certified accuracy. Fluke Drives this boat, but Triplett, and Klein, are in the game. Jim


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