In message <3E930A0A-934B-11D8-8D78-000A95A8B376@qwest.net>, Bill
Lawrence <ynotink@qwest.net> writes
>Not so, they can also be used for DC depending on what they are
>attached to. Same principle as the induction loop on an electronic
>tach, which runs on DC. They use the inductance produced by an
>electrical current to run a voltmeter (or galvanometer) movement.
>
>Bill Lawrence
>
>On Apr 20, 2004, at 1:56 AM, Alan F Cross wrote:
>
>> I can't see how an inductive loop will work, as they only give an
>>output from an alternating current.
>>
>> Now, a Hall Effect device strapped to the cable might work. Anyone
>>experimented here?
>
>>
>
I think the induction loop on a tach is relying on the pulses, which
look to a 'transformer' like AC. No pulses, no deflection.
As said elsewhere, modern clamp-ons use Hall Effect.
--
Alan F Cross
|