Posted by Red Dave on November 17, 2009 at 08:16:42 from (66.216.141.163):
In Reply to: Electrical experts? posted by Dave H (MI) on November 17, 2009 at 07:53:46:
Short answer is yes. But there are a few caveats. The meter works by putting the coil of the meter movement within the magnetic field of the current flowing in the conductor. That flowing current then induces a small current in the meter movment to make it deflect and give a reading. I have one like it, and it works very nicely to tell the direction of current flow and approximetely how many amps are flowing. It is not a pinpoint precision device, but is reasonably accurate as long as you understand it's limitations.
Yes, you can set up a circut on the bench to test it. If it is like mine, it may take more than a lamp to draw enough current for the meter to deflect very much. I think mine is a 0 - 200 amp range, so a single lamp might not have much of a noticable effect on it. You might need to add load, such as more lamps in parallel, or something that draws more amps.
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