Hi Folks,
I am building a new dim bulb setup. It's my second one, my bench grew a little and the current dim bulb is a little hard to safely reach.
The new one will use a little AC Voltmeter and Ammeter. Does an ac ammeter that reads 0-3amps generally have a shunt onboard or am I expected to come up with a tiny value resistor to wire in with it? There is no literature with this ammeter and nothing on the face to indicate there is a shunt onboard.
Thanks,
Dave Lowa

 

Some information of the actual meters would be nice if you want an answer.

 

e.g. I have some that are electronic in nature, also some that are simple moving coil ?
The answer depends on the type you have. ?

 

Some information of the actual meters would be nice if you want an answer.

Sorry of course I should have included some details. This meter is a HUA SO-45. The movement, if I remember the symbols correctly , is fixed iron. I believe that's correct. It is marked "Class 2.5" and Tested to 1000V. It is an AC meter.
I'm afraid that all the information I have to offer.
Thanks for your reply.
Dave Lowa

 

As it comes it claims 300ma DC meter.
Anything greater, it seems will require a shunt.

 

Have a look on kdsimeter.com, as that is where they originate (or are copied from).

 

This is where I found it.
https://www.aliexpress.com/i/2255800140613733.html?gatewayAdapt=4itemAdapt

 

This is where I found it.
https://www.aliexpress.com/i/2255800140613733.html?gatewayAdapt=4itemAdapt

Yes, I see that meter but the one I have is the same series but 0-3 Amps

 

AliX sells panel meter from uA to 300A all by the same mfg.

 

AliX sells panel meter from uA to 300A all by the same mfg.

View attachment 288008

Thanks Sam ... Nice family you got there.

 

What is "A Dim Bulb Setup"? And why measure current as part of it??
And the listing I saw in the link was a meter reading MILLIAMPS, much different from AMPS. That is to say, 1000 times less current than is being discussed.