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Technical How-To's
FAO GRAZY - Leisure Battery/Split Charge
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<blockquote data-quote="Araon" data-source="post: 131122" data-attributes="member: 606"><p>amp meter or ammeter can be purchased as a dash instrument from the usual autometer suppliers or from a hobby/electronics shop, the shunt resistor is used to drop the current through the meter as most meters will only handle low current in the region of milli amps or thousanths of an amp then a simple piece of ohms law will get you the true reading not accounting for the loss of the meter which again will be in the region of milli amps which is negligable for your applications.....</p><p></p><p>Obviously the dash version will have a shunt installed and be roughly calibrated, usually a zero centred jobbie with a few graduations so a rough guesstimate can be achieved.</p><p></p><p>Oh and the ammeter is in series with the circuit path i.e. break the line that you want to measure and the shunt will need to be in parallel with the ammeter.</p></blockquote><p></p>
[QUOTE="Araon, post: 131122, member: 606"] amp meter or ammeter can be purchased as a dash instrument from the usual autometer suppliers or from a hobby/electronics shop, the shunt resistor is used to drop the current through the meter as most meters will only handle low current in the region of milli amps or thousanths of an amp then a simple piece of ohms law will get you the true reading not accounting for the loss of the meter which again will be in the region of milli amps which is negligable for your applications..... Obviously the dash version will have a shunt installed and be roughly calibrated, usually a zero centred jobbie with a few graduations so a rough guesstimate can be achieved. Oh and the ammeter is in series with the circuit path i.e. break the line that you want to measure and the shunt will need to be in parallel with the ammeter. [/QUOTE]
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EarlyBay Forums
Technical
Technical How-To's
FAO GRAZY - Leisure Battery/Split Charge
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