DMM woes

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Foy
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DMM woes

In an attempt to get past the learning curve on the electronics side of flashlights, I'm having a problem getting a reading that means anything on my DMM.  I want to measure the amps my lights are pulling. 

I have an Amprobe 5XP-A and when I put a lead on the battery and the other lead on the flashlight body, it goes all over the place and/or then says "0.L"  I'm certain this is a really stupid question but I can't believe my Manafont XM-L is pulling 10 amps or 1.06 amps.  Both seem wrong and anyway, it hardly settles down to any one value.

What am I doing wrong?

foyknowsmusclecarsnotflashlightsFoy

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Edited by: Foy on 03/29/2011 - 01:41
mfm
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From what I can see, your DMM can only handle up to 200 mA.

edc
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You need thicker leads and a 10 amp dmm. Mine only shows 1 amp with normal leads and mine is 10amp

 

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jekostas
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You need a DMM that can handle a minimum of 10 amps.  The Amprobe you have can only handle 200 milliamps.  That's really not going to work.

Budgeteer
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mfm wrote:

From what I can see, your DMM can only handle up to 200 mA.

+1

I was thinking to get this one as backup:

http://cgi.ebay.com/UNI-T-UT33A-Palm-Size-Digital-Multimeter-/2607480443...

Usefull range having 3999 display capability. Excellent for up to XML current measurements!

kragmutt wrote:

They're gonna send you a green redcat with a black LED.

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Budgeteer
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For not much more the one i posted have better display capabilities. Actually it is the cheapest available with decent display.

kragmutt wrote:

They're gonna send you a green redcat with a black LED.

kragmutt
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I splurged and ordered the VC99

http://www.dealextreme.com/p/3-0-lcd-handheld-digital-multimeter-voltage-current-resistance-temperature-2-aaa-37082

I figure a DMM is such a useful thing, might as well get a decent one.

Foy
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I was afraid of that.  The one thing I want most to measure . . . I hate not knowing and/or not being able to provide something tangible about what the driver/emitter is doing.  I suppose I'll have to divert some flashlight money for a decent Multi Meter.

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Don
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The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...

sirnic
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I have the cheapy Davx linked to.

It is fine for my requirements though from memory I did replace the leads with heavier duty ones.

jamesearljonesi...
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heres some basic info on how to use them with some diagrams.

http://www.electronics-radio.com/articles/test-methods/meters/how-to-measure-current.php

03/04/16 

 

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Foy
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Thanks, James . . .

Foy

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