> after all what is the point of measuring DC from static magnetic field ? it
> is there and you apply the voltage so you know the transient analysis and
> bias values.
>
> What can be the application so that you will need to measure the a static
> current?

Assuming that query is a serious one, that's what the DC current
measuring ranges on meters that have them are used for.

Taking an everyday example - the current drawn by a vehicle starter
motor is considered to be DC - rather time variant, but not AC. People
are interested to know the approximate mean value as it may indicates
battery state, starter motor condition, engine load (due to
temperature or compression or ...) and more. Given the rather dynamic
resistance path. the variation of motor back emf with speed, the
current battery voltage and more. direct measurement of current or a
direct analog (in this case, magnetic field) is far far far easier
than inferring or calculating it by any other means.

Two questions:

- Do you own a meter or meters than can measure direct current?
- If yes, do you use them for this purpose?



           Russell

GC?
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