Wanderer Motorhome Page 17

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Driving in France?
Then this web site is a must:
http://about-france.com/travel.htm

Email Brian, Click here

Could be a must for Motorhomes;
Environmentally Safe Toilet Treatments for motorhomes, caravans and boats:
http://www.bioprox.co.uk

For a Holiday with a difference in a Motorhome, see this link:
http://www.landyonline.co.za/off_road/dipli/twd2.htm

image: Serif - Software with Imagination
Serif is the world's leading independent publisher of desktop publishing, design and graphics, photo editing and web design software with an award-winning range and a reputation for a cheaper professional effects and publishing capabilities accessible to ordinary PC users.

As author and maintainer of this web site. I do not save, retain, or sell  any email addresses of those who email me. Should you not get a reply from me, please send again, I might have missed it in my spam catcher!

Additions to Motorhome pages 2010:-

Fitting New Automatic Water System Pump
Winterising the water pump.
Water Tank Level Meter-modification to electronic circuit
Basin Mixer Taps - tip & how to repair a dripping tap

To Speed up page loading, images are shown as a 'Thumbnail.' Clicking on these will show the complete image

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To Page Links & Contents Index

Contents: 1. Volt Meter on Control Panel. 2. New Digital Voltmetr

Control Panel Voltmeter
See Page 8 for Control panel drawing

Battery Meter Click for larger image

The older Voltmeter

Click for larger image New Voltmeter in position

Voltmeter in Position

DIGITAL meter.
Showing the reverse side of installation

Digital Voltmeter Reverse view of installation

Click for larger image Voltages of charge conditions

Battery in different charge states.
Avoid discharging the battery below the 40% level whenever possible.
See Mark S. Nemeth site:

http://www.ccis.com/home/mnemeth/12volt/12volt.htm
Who has allowed a down load of this information.

     The Control Panel in the Wanderer does not have a panel voltage meter, just LED's for high and low indication to monitor the leisure battery.

     When the LED for 'Low' is displayed it's too late! So a meter was purchased from my local caravan dealer and fitted to the ZIG panel position. This had switch control.

         The advantage of a switched controlled volt meter is; It is now possible to monitor the Van and leisure batteries before turning on the voltages to the system. When the system is turned on, at the control panel, it is possible to monitor the voltage drop and this will give an indication of the charged condition, of the batteries.

      A battery always gives a higher voltage when not connected, than when connected and a load is taken from it. So if monitored over a period of time the battery condition can be assessed. For example; Off load the battery will indicate 13.8 volts, on load the voltage will drop to 12.6volts, if this drops to 10.6 then it's possible you have a defective cell, i.e. 12.6 -  10.6 = 2volts lost from the defective cell.

     It can be checked over time for indicating the battery's loss of capacity, this is shown as a progressive lowering of the voltage on load. Once the battery,on load, shows a voltage of about 11.8volts after a couple of years,  then it's time to buy a new one.

    'Load' definition; 

     When the battery is supplying volts to the caravan interior.

Volt Meter drawing

Schematic and drawing of voltmeter installation.

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. 

New DIGITAL Voltmeter

Digital Voltmeter New installation

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.

 

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:

http://www.ccis.com/home/mnemeth/12volt/12volt.htm

 

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