victoly Posted February 23, 2012 Share Posted February 23, 2012 Not really sure where to post this... so.... I have 3 multimeters, and NONE of them will let me get to the DC amperage i need to get to adjust my meanwells so i dont fry my LEDs when i start to crank up the juice. Does anyone have one that I can borrow for a day or two? I'm on the south side of town -IHM Quote Link to comment Share on other sites More sharing options...
subsea Posted February 23, 2012 Share Posted February 23, 2012 The Fluke Meter which I use is a Model #T5-600. The DC amper readings are in whole numbers. In my opinion it is not sensitive enough to do what you intend. During start-up of my uninterrrupted power supply, I used a digital display from my battery charger, less than $20. Just a thought for you. _Patrick Quote Link to comment Share on other sites More sharing options...
victoly Posted February 23, 2012 Author Share Posted February 23, 2012 Yeah, i need something that will read at least to the tenths, preferably a little lower. Quote Link to comment Share on other sites More sharing options...
jaggedfire Posted February 23, 2012 Share Posted February 23, 2012 I have a few MM around if you need to borrow one (Fluke 117 and older Cman). Would you need it for the weekend or longer? Just a note, most all (all mine) need the test lead moved to the proper receptacle to test amperage. -Nick Quote Link to comment Share on other sites More sharing options...
victoly Posted February 23, 2012 Author Share Posted February 23, 2012 You would be my hero. I just need it for an evening. Quote Link to comment Share on other sites More sharing options...
dshel1217 Posted February 24, 2012 Share Posted February 24, 2012 you can always use voltage = current * resistance ( v=i*r), to find the voltage. Quote Link to comment Share on other sites More sharing options...
victoly Posted February 24, 2012 Author Share Posted February 24, 2012 hadn't thought of that, but i'd feel better having a meter that rules out any other funky electrical effects. Quote Link to comment Share on other sites More sharing options...
jestep Posted February 24, 2012 Share Posted February 24, 2012 Kirchhoff voltage law (E=IR) is pretty inaccurate when it comes to actual circuits, although LED circuits are pretty simple. What specific driver do you have? I thought most were constant current output so you don't need to worry about anything but the circuit design. 1 Quote Link to comment Share on other sites More sharing options...
(Bio)³ Posted February 24, 2012 Share Posted February 24, 2012 if they have a dimmable meanwell then there is a pot inside that canbe adjusted which it sounds like they are trying to do. my MM from harbor freight for free is the same one rapidled sells and it works to set the drivers. You can borrow it if you like. Quote Link to comment Share on other sites More sharing options...
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