[Boatanchors] Meter Resistance Measurement

[Garey Barrell]

Dick -

Modern, quality DMMs put only uA's of current through ohmmeter subjects.  A 1 mA movement will 
probably barely move, but start on a high range and reduce until the DMM reads the internal resistance.

Older ohmmeters put quite large currents through the device under test, especially on the lower 
ranges, necessitating the more elaborate parallel resistor measurement methods.

73, Garey - K4OAH
Glen Allen, VA

Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
<www.k4oah.com>


Richard W. Solomon wrote:
> What's the best way to measure the internal resistance of a 1 mA DC Meter ?
>
> I recall an old Handbook showed a way, but that book is no longer here.
>
> 73, Dick, W1KSZ
>