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Old 08-08-2010, 09:58 PM   #15
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Quote:
Originally Posted by TankerIP View Post
Boy am I embarrassed. I had 2 DVMs with low batteries. The low batteries in the meters caused the readings of my trailer batteries to be high. I guess the volt meters make their readings based on differences from the installed battery. Sounds crazy but it's all that makes sense to me.

Both VMs had 9v batteries that were low and read 5v - - 4 v low. The meters measured my trailer batteries at 16+v, but the batteries were really correct at 12+ v (a 4v difference). What was my clue? I took the meters over to my truck and also read the same16v. that I had on the trailer.

Not sure what the moral of all this, but obviously you can't trust a digital meter to be absolutely accurate. I'll have to keep my eyes open for a good reliable replacement for the two that I have.

Thanks to all you for your advice.
Thats good Tank,

I was worried that those nearly 17 volt batteries were going to explode! Glad it was just a multimeter problem as od as that seems. Good idea checking it with the truck.

Vin
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