Does a volt meter waste electricity? - SailNet Community
 
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post #1 of 7 Old 08-22-2010 Thread Starter
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Does a volt meter waste electricity?

Hey guys,

Weird (stupid) question: does a voltmeter waste electricity?

Thank you
RG
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post #2 of 7 Old 08-22-2010
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Question No, Yes, Maybe....

My understanding is that the analog ones do not, but then that volt meter is switched on my boat between off (center) or left or right on a spring return to measure voltage for banks one or two.
I hear that there is a very small drain for the digital meters, but have not confirmed that.
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post #3 of 7 Old 08-22-2010
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Both analog and digital voltmeters draw some current, but it's a very small current....on the order of 1ma for analog meters. The "waste" is from the resultant heat and light.

Of the ba-zillion things to worry about on a boat, this isn't one of them. For all practical purposes, voltmeters don't "waste" enough energy to be a consideration.

Bill
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post #4 of 7 Old 08-22-2010
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Just food for thought.

Volt meters are cool and necessary...but I find a digital amp meter in addition, to be worth 10 times its minuscule power draw.....one glance will tell you if something got left on when leaving the boat or hitting the bunk....took me 5 min one day to find the .5 draw it was telling me we had.

A dim light in the forward head which appeared to be off when looked at with the bright sun comming through the port....only way I eventually found it was to start switching off circuits till i located the culprit...then It was a hole lot easier to find once narrowed down.

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post #5 of 7 Old 08-22-2010
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Oddly enough Ripple has a 12v lighter built in so we just run a cheap plastic voltmeter that plugs into that. The 'lighter' is switched along with the depth gauge and instrument lighting.
I wouldn't 'hard wire' it to the batteries. Definately put it on a switch.
A current meter isn't a bad idea either but, same deal, it should be on a switch. The only things we have straight off battery are the automatic bilge pump and the radios.

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post #6 of 7 Old 08-23-2010
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Blue Seas digital voltmeter uses a minimum of .6 watts and a maximum of 1 watt. A small price to pay for the information. Their analog meter uses 1 milliampere.

Brian
Living aboard in Victoria Harbour
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post #7 of 7 Old 08-23-2010
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Quote:
Originally Posted by mitiempo View Post
Blue Seas digital voltmeter uses a minimum of .6 watts and a maximum of 1 watt. A small price to pay for the information. Their analog meter uses 1 milliampere.
So .05 amps for mine then...probably about the same for the link Pro...So Im buring up .10 amp hours, or 2.4 amps per day....thats a lot more then I figured it would be I have to admit....I figured it would be in the milliamps as well.

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The purchase price of a boat is just the admittance fee to the dance...you still have to spend money on the girl...so court one with something going for her with pleasing and desirable character traits others desire as well... or you could find yourself in a disillusioned relationship contemplating an expensive divorce.

Last edited by Stillraining; 08-23-2010 at 12:56 AM.
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