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Old 16th November 2009, 12:02 PM   #1
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Default DC amp clamp needed !!

Need to get an Amp clamp meter that reads DC upto over 300 amps ? Any recommendations please ?
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Old 16th November 2009, 12:24 PM   #2
AndrewT is offline AndrewT  Scotland
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a four terminal 0r01 would drop 3Vdc at that peak current.
If that is too much then look for a 0r001 four terminal resistor to allow current to voltage conversion. Far cheaper than any clamp meter.
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Old 16th November 2009, 12:29 PM   #3
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No good for my application , measuring car starting currents , big ICE amp currents , inverter battery currents , etc , etc. I actually have some big AVO shunts , but as I said , no good for in circuit measurements.

Last edited by thermal runaway; 16th November 2009 at 12:31 PM.
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Old 16th November 2009, 12:48 PM   #4
star882 is offline star882  United States
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Make your own out of a flyback transformer core and a hall effect sensor.
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Old 16th November 2009, 12:58 PM   #5
poobah is offline poobah  United States
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Default a possible solution

Do need a split clamp? It makes a big difference costwise...

If not... then F.W. BELL / Sypriss makes these... with a nice price. You might have to build a small diff amp circuit to get the most useful readings.

Current Sensor

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Old 16th November 2009, 01:12 PM   #6
eyoung is offline eyoung  United States
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Go to Fleabay and look for a used Sun Electric VAT24 or 40 automotive auto electrical starting and chargeing test equipment, or something similar from Bear . These are used in automotive battery, starter, and alternator testing there are probably some info online Sun Is now part of Snap On .

Good luck, Elwood
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Old 16th November 2009, 01:17 PM   #7
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Do need the split type for access reasons. Need to go for an off the shelf unit for convenience and ease of use.
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Old 16th November 2009, 01:20 PM   #8
poobah is offline poobah  United States
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What type of frequency response do you need?
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Old 16th November 2009, 03:21 PM   #9
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Just DC .
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Old 16th November 2009, 03:22 PM   #10
AndrewT is offline AndrewT  Scotland
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Quote:
Originally Posted by thermal runaway View Post
Just DC .
I doubt it!
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