Re: Measuring Current
From: Spehro Pefhany (speffSNIP_at_interlogDOTyou.knowwhat)
Date: 01/31/05
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Date: Sun, 30 Jan 2005 20:26:48 -0500
On Tue, 1 Feb 2005 00:36:54 -0000, the renowned "Jim Douglas"
<james.douglas@genesis-software.com> wrote:
>I saw some of those on Ebay today, It seems to have a scope type thing that
>simply wraps around a wire??
Like these ones I put up (these particular ones are sold)?
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=3870013201&ssPageName=STRK:MESO:IT
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=3867723467&ssPageName=STRK:MESO:IT
The clamp opens up and you can put it round the wire. They are *not*
for small currents-- scores of mA up to hundreds of A, depending.
If you put multiple wires through the core (like an AC line cord) they
will read about zero, unless there is a fault to ground, as they read
the difference between the two currents.
They are great for working on power stuff- you can poke around in a
panel and check motor currents etc., but for electronics you really
want some DVMs.
Best regards,
Spehro Pefhany
-- "it's the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com
- Next message: Genome: "Re: Coil formula"
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