On 29/05/2013 15:18, Bill Wright wrote:
Harry Bloomfield wrote:
John Williamson presented the following explanation :
Harry Bloomfield wrote:
Remember the old type charge / discharge ammeters, where used a
couple of turns of cable which used to sometime be fitted to
vehicles ? I have one fitted to the tractor mower which is not
marked + and - and I'm sure it reads the wrong way. The needle goes
left when on charge, I seem to remember the norm is to move to the
right.

Can anyone remember, before I take steps to correct it?

My Lard Roller ammeter is marked - to the left, + to the right, as
have all the others I've used. Has your tractor mower been converted
from +ve to -ve earth at some point?

No, it is not that old - I suspect the coil windings (2 turns) were
simply fitted the wrong way and it has bothered me since I got it.

Is it fitted upside down?

Bill
if you don't like the way it goes just reverse the wires