How do DC clamp ammeters work?

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Externet
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How do DC clamp ammeters work?

Post by Externet » Wed Jun 11, 2003 7:06 pm

Hi fellows.
...And, is there any Hall effect sensor with its output being analog and directly proportional to a magnetic field intensity ?<p>Thanks,
Miguel
- Abolish the deciBel ! -

Chris Foley
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Re: How do DC clamp ammeters work?

Post by Chris Foley » Wed Jun 11, 2003 8:10 pm

Look at Allegro Microsystems for a wide selection of Hall effect switches and sensors.<p>http://www.allegromicro.com/

bridgen
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Re: How do DC clamp ammeters work?

Post by bridgen » Wed Jun 11, 2003 11:53 pm

Hi Miguel,<p>Clamp-on ammeters which don't use a Hall effect device are simply a transfomer without the primary winding. When clamped round a conductor, the conductor forms the single turn primary. <p>David

russlk
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Re: How do DC clamp ammeters work?

Post by russlk » Thu Jun 12, 2003 11:07 am

Check out the UGN3503UA. I got one from Advantek, it is linear and quite sensitive.

Dean Huster
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Re: How do DC clamp ammeters work?

Post by Dean Huster » Thu Jun 12, 2003 4:32 pm

And the clamp on current probes and ammeters that also respond to dc do use Hall-effect sensors. The original "Amprobe" brand of clamp-on current probes used the transformer concept as did the 50MHz Tektronix P6021 and 200MHz Tek P6022 current probes and "bottomed out" at around 125 Hz (P6021) or more. Later Tek current probes used a Hall-effect sensor for currents down to dc. <p>Dean
Dean Huster, Electronics Curmudgeon
Contributing Editor emeritus, "Q & A", of the former "Poptronics" magazine (formerly "Popular Electronics" and "Electronics Now" magazines).

R.I.P.

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