karl riley
Senior Member
Re: EMF problem
Bob, some more info. You mention you have a probe that plugs into the Fluke 87. That meter is inaccurate at about 5 mV and below, so if it converts amps to mV from the probe, it will not read low amps.
I went to search and put in ammeters. Found a site which lists Extech, which has a good variety of ammeters. Went to minis and found one that I like and talked myself into buying it! It is true RMS, has the small 0.9" jaws for tight work, has data hold, max/min, peak, AC to 1 mA, DC to 1 mA, even measures frequency. With all the bells and whistles it comes to $235 at this site, or $249 at Extech's site. The number is EX-380947.
You could also do a Yokogawa search and see what they have. I like Extech's variety. Fluke sometimes sacrifices low-scale accuracy to ruggedness, etc, plus I think they charge extra for their name. Just an opinion.
And of course analog ammeters are of little use for this kind of trouble shooting.
Karl
Bob, some more info. You mention you have a probe that plugs into the Fluke 87. That meter is inaccurate at about 5 mV and below, so if it converts amps to mV from the probe, it will not read low amps.
I went to search and put in ammeters. Found a site which lists Extech, which has a good variety of ammeters. Went to minis and found one that I like and talked myself into buying it! It is true RMS, has the small 0.9" jaws for tight work, has data hold, max/min, peak, AC to 1 mA, DC to 1 mA, even measures frequency. With all the bells and whistles it comes to $235 at this site, or $249 at Extech's site. The number is EX-380947.
You could also do a Yokogawa search and see what they have. I like Extech's variety. Fluke sometimes sacrifices low-scale accuracy to ruggedness, etc, plus I think they charge extra for their name. Just an opinion.
And of course analog ammeters are of little use for this kind of trouble shooting.
Karl
