Ammeter

[single]

I want to see exactly how many amps i'm drawing at different times, so will this plan work? It won't be permanent.
See diagrams-

View attachment 49546View attachment 49547View attachment 49548

 

[NickRobinson]

Looks OK, though NASA insist on the shunt being in the neg return for their BMs.
BTW, some need a separate 12v supply to drive them. Many don't and you can common the +ves

 

[JumbleDuck]

I want to see exactly how many amps i'm drawing at different times, so will this plan work?

Is the shunt a 100A/75mV one? If so, it looks fine.

 

[single]

Is the shunt a 100A/75mV one? If so, it looks fine.

Thanks. I just read about it being in the return on another website.
Yes, 100A/75mV

 

[VicS]

I want to see exactly how many amps i'm drawing at different times, so will this plan work? It won't be permanent.
See diagrams-

Yes .

The shunt can go in the positive or negative connection. The wires between the unit and the shunt can be quite thin as they will carry virtually no current. I fitted permanently fuse both with low value fuses, or fit in the negativeconnection if possible.

As said some do not need a separate power supply although I beleive it is possible to buy power supply units for those that do which enable them to be powered from the main battery.

 

[single]

I want to see exactly how many amps i'm drawing at different times, so will this plan work? It won't be permanent.
See diagrams-

Yes .

The shunt can go in the positive or negative connection. The wires between the unit and the shunt can be quite thin as they will carry virtually no current. I fitted permanently fuse both with low value fuses, or fit in the negativeconnection if possible.

As said some do not need a separate power supply although I beleive it is possible to buy power supply units for those that do which enable them to be powered from the main battery.

I think i'll power it from a 9v battery with its own on/off switch.

 

[vyv_cox]

You need to be very certain that the return used for the shunt is carrying all current. When I installed my amp/volt meter it took quite a long time and much swearing to connect every return to the same point.