reading ammeter

[speedwell]

hy , i've just connect my empi ammeter on the 61 it's an -30A -0- +30A
i would like to know the way for reading this one

here's what i read when i turn the key wihtout starting the engine (pict1)

now i read this when i start the engine (pict2)

the engine turns in slow motion (pict3)

when the light are open here's what i read (pict4)

[speedwell]

and when  I rise  the rpm  to make turn the dynamo to reload  ,the needle comes down (pict5)

MY QUESTION IS   , does it read correctly  , i would like to say is it normal that the needles goes into  + and not - 

thx in advance for your advice


fabs

[speedwell]

no one have an idea   

[Rick Meredith]

Doesn't look like it to me. Should be negative when you first turn it on and while the starter is cranking because nothing is charging.

[speedwell]

Doesn't look like it to me. Should be negative when you first turn it on and while the starter is cranking because nothing is charging.

that's what I also thought, but I followed well the wiring schema
the + came from the battery ,and - goes to  the light switch
And I suppose that if i invert the threads , the reading will be made in the other way

thx
fabs