Follow up to post 35742 Voltage Drop
Submitted: Tuesday, Jul 25, 2006 at 09:37
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Member - greg S (QLD)
Just been given a nudge by Trevor R to put a follow up to my dilemma with losing 6+ amps per day. Sorry it has been so long till I put this up and many thanks to those that gave advice, it was greatly appreciated :))))))
Well I took it to the auto eleccy to check where, what etc. The batteries seem to be ok. The current draw was minimal and that was only for the meter. It seemed the meter was reading wrong. Talked to the guy's who installed it and they said they will get someone to check it out. Tony from Bainbridge Technologies came up and checked out the whole system.(Bainbridge sell the meter to companies that install them. Tony found the problem and rectified it and was very professional) He found that the guy's who installed it had wired it up wrong(again, it has already been back to them because they wired it up incorrectly).
The meter wasn't reading the second battery as they connected it up to the wrong side of the shunt ,Again!!!
It is now on the correct side of the shunt. The meter was recalibrated and all seems to be working as it should.
For those that don't know the shunt is a negative shunt where all negative wires from lights, plugs etc are connected to one side and the other side of the shunt is connected to the battery/ies negative. The meter is connected to the shunt and reads any power that is being drawn from the batt's. It is a good system when it it working properly.
Hopefully this might assist others who may have a similar problem.
Cheers Greg
Reply By: Member - Mike DID - Tuesday, Jul 25, 2006 at 11:33
Tuesday, Jul 25, 2006 at 11:33
People seem to be regularly confused about how to describe instantaneous current flow and total current flow.
You can't lose 6 amps per day - amps is an instaneous measurement. When my Waeco is running flatout it _Affordable_Storage_Drawers.aspx 6 amps, when it cools down the internal regulator will reduce the instantaneous current draw to 3 amps. When the Thermostat switches the compressor the Waeco _Affordable_Storage_Drawers.aspx 0 amps.
If I average out all these variations over a day I can say that Waeco uses 1 amp AVERAGE or 24 amphours over a day. You could also describe this as 1 amphour per hour, though it's unnecessarily clumsy.
You can't compare amps and amphours (or amps per hour as some authors write !!) so it is important to write correctly if you want people to understand what you are trying to say.
Mike
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Follow Up By: Kiwi Kia - Tuesday, Jul 25, 2006 at 17:59
Tuesday, Jul 25, 2006 at 17:59
And another very small point is that the meter actually measures a voltage differance across the shunt and the display is calibrated to show the instantanous amps.
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Reply By: disco1942 - Tuesday, Jul 25, 2006 at 12:22
Tuesday, Jul 25, 2006 at 12:22
Greg
What type of monitor did Bainbridge supply you? I see they have 3 different models on their website.
Plasmatronics solar controllers (which include similar battery monitoring) are another device that people who do not or can not follow instructions muff up. See tinyurl.com/nnfg8 for the types of things they do to these.
PeterD
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Follow Up By: Member - greg S (QLD) - Tuesday, Jul 25, 2006 at 19:43
Tuesday, Jul 25, 2006 at 19:43
Peter,
The meter is a Synergex Vision 6. These are used in the marine industry.
Yes it would seem that the instructions are too hard for some to read, especially when the company has 2 goes to wire it up properly and then has to have someone come to our house to fix it again. I only hope that the next one they do is done properly.
Cheers Greg
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