Re: [Chrysler300] Volta, Ampere & Ohm

[Paul Holmgren <paulholm@xxxxxxxxxxxxx>]

Richard Barber wrote:
> Could one of our electrical techs or engineers explain this?  I’m guessing
> that the ammeter consists of a precision low resistance resistor with a
> millivolt meter attached to each end and calibrated in Amperes.  It seems
> unlikely the resistor would break down over time, but maybe they can be
> zapped by high current, moisture and time.
> 
> Rich Barber
> Brentwood, CA

REALLY LOW LOW LOW resistance,  more like a shunt, the meter movement in almost 
all annylog meters actually reacts to low levels of CURRENT flow, so with the 
right bridge circuitry the faces are marked for the desired readings. A shunt 
can be a wire winding, a metal strap of a predetermined size, or a resister 
across the wire winding. Once one of these is dramaged dats it for the meter 
movement usually. GOing open tends to KILL the circuit its a part of, that is 
why for awhile some of the mopar current meters actually had a pickup loop that 
used induction to detect the current flow, No actual active part of the meter 
actually handled the higher current flows of the cars electrics.

-- 
Paul Holmgren
Mine: 2 57 300-C's in Indy
Hers: 05 PT GT R/T HO Stage 1
Hoosier Corps L#6


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