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Jeff Liebermann Jeff Liebermann is offline
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Default Resistance measurements

On Mon, 17 Jul 2017 05:00:55 -0400, wrote:

I do have to ask, why these meters used BOTH the D cells and other
batteries as well. (In other words, more than one kind of battery). Why
didn't they just use one battery or one set of batteries for the whole
device?


The Rx10K scale needs high voltage and low current to measure large
resistors. The Rx1 scale needs low voltage and high current to
measure the small resistors. One could use the high voltage 15v
battery for measuring low resistances, but you would be replacing 15v
batteries at an a alarming rate. Be thankful that the ancient
designers of the VOM did not include a different battery for each
resistance scale.

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