low reading ammeter

[griz]

hi,just fitted an analogue ammeter with external matching shunt to my home made e bike.i know the bike draws over 30 amps under load but the meter hardly registers anything at all. about 5 amps so far.any ideas?im a bit new to this electricery lark.

[e-beach]

hi,just fitted an analogue ammeter with external matching shunt to my home made e bike.i know the bike draws over 30 amps under load but the meter hardly registers anything at all. about 5 amps so far.any ideas?im a bit new to this electricery lark.

Depends on the shunt and meter. If you give us the names, model numbers and specs of the shunt and meter it will be easier to help.

Of just give us the links to where you bought them so we can check them out.

[e-beach]

The wire you used is probably ok, it does sound like it is heaver then necessary. if you shunt is only 75mv then you should be able to use finer gauge wire.

If you can not get us the manufacture name and model numbers of your equipment, then we would really only be guessing.

My only guess at the moment is that the meter and shunt aren't well matched for your 30 amp controller. In other words your setup is looking for a higher amp draw.

But that is only a guess.

[griz]

not using a controller just a few relays to switch between parallel and serial and a couple of off/on switches.anyway, no worries thanks for your efforts and mind how you go.cheers,griz

[amberwolf]

It's really frustrating when people post requests for help, give insufficient information, and then refuse to answer any questions that would let us help them. It's one reason a lot of people don't even bother replying to help requests, and why so many go completely unanswered (0 replies)--these people like "griz" are just wasting our time.

[e-beach]

not using a controller just a few relays to switch between parallel and serial and a couple of off/on switches.anyway, no worries thanks for your efforts and mind how you go.cheers,griz

If you make sure the shunt is between the positive out of your pack and the first relay or switch, then you will have your best chance of getting your best reading.

[e-beach]

It's really frustrating when people post requests for help, give insufficient information, and then refuse to answer any questions that would let us help them.

Yea, it would be nice if they worked a bit harder at it and let us really help out.