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Control Panel Voltmeter
See Page 8 for Control panel drawing
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The older Voltmeter |
Voltmeter in Position |
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DIGITAL meter.
Battery in different charge states.
http://www.ccis.com/home/mnemeth/12volt/12volt.htm |
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Schematic and drawing of voltmeter installation. |
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A recent innovation of mine has been to introduce a DIGITAL meter. This gives a more accurate reading of the battery. The difference from full charge 12.7volts to 20% capacity is 12.05volts this went unnoticed with the old analogue meter. |
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Installed May 2009 |
See: www.dpmeters.co.uk
for supply and information regarding the Digital Meter.
[It would seem this web site is not
available, out of business?]
Below is the back of the Digital meter and circuit diagram of the unit.
Note the whole principle relies on the SHUNT resistor where the
readings are measured. This allows the measurement of Current and
Volts with just a click of a switch. When the charger is on the meter
shows a [-] bar before the reading, when showing the battery voltage.
The bar is not shown.
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Back of the voltmeter |
Circuit as fitted to the Motorhome |
See Mark S. Nemeth's site for an in depth narrative on 12 volt electrics in the Motorhome:
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