Dear Matthew,
No e-boater should be without a clamp-on amp meter. Make sure you get one with a DC range, as most measure AC current only. No need to open connections that way, and you can use it in many other locations as well. Check eBay for DC Clamp Meters.
Arby
From: Matthew Geier <matthew@acfr.usyd.edu.au>
To: electricboats@yahoogroups.com
Sent: Friday, October 26, 2012 3:38 PM
Subject: Re: [Electric Boats] Re: Lead battery charging
On 27/10/12 02:20, oak wrote:
> And even then, it's hard to tell whether the charger is putting out
> any current or not. I guess I should be able to put an ammeter in
> line with the charger and see what's going on.
>
Shouldn't you have an ammeter in the line anyway ? - knowing current
draw when running is probably even more important. And the smarter 'BMS'
systems measure current both ways and do calculations on charge state.
My TBS battery meter does that.
When I first connected it up, I had the sense wires to the shunt the
wrong way around, so it was measuring discharge as charge and vis, so it
wasn't giving me a run time figure. Took me a while to realise what i'd
done wrong as the currents it was measuring were sensible, just the
wrong direction....
> And even then, it's hard to tell whether the charger is putting out
> any current or not. I guess I should be able to put an ammeter in
> line with the charger and see what's going on.
>
Shouldn't you have an ammeter in the line anyway ? - knowing current
draw when running is probably even more important. And the smarter 'BMS'
systems measure current both ways and do calculations on charge state.
My TBS battery meter does that.
When I first connected it up, I had the sense wires to the shunt the
wrong way around, so it was measuring discharge as charge and vis, so it
wasn't giving me a run time figure. Took me a while to realise what i'd
done wrong as the currents it was measuring were sensible, just the
wrong direction....
__._,_.___
| Reply via web post | Reply to sender | Reply to group | Start a New Topic | Messages in this topic (18) |
.
__,_._,___
No comments:
Post a Comment