RE: Ammeter

["Gambony, Jim" <jim.gambony@eds.com>]

        Dan,

        As an  electrical engineer I have to question your assertion that
voltmeters are "thermal devices".  I think what you're referring to was an
earlier thread that stated that the older Smiths dash guages were thermal
devices (as a way to average out the readings)  as a way to keep them from
jumping around as the car ran down the road.

        Most mechanical guages and meters are driven by electromagnetic
force, not thermal.  I have plenty of (non-Smith's) electrical guages
(including voltmeters)  that are VERRRRY quick to respond to changes!  

        My .02

        Jim

        > 2) An ammeter responds instantly to changes, whereas a voltmeter,
being a
        >thermal device, responds rather slowly.
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