I got a analog amp meter with a shunt. Anyone have the proper way to install with shunt
Thanks in advance
Mitch
I got a analog amp meter with a shunt. Anyone have the proper way to install with shunt
Thanks in advance
Mitch
Retired Guy- Central Iowa.HVAC/R , Cloudray Galvo Fiber , -Windows 10
Ammeters are usually millivolt meters with a precision resistor called a shunt. As current flows through the shunt, it generates a small voltage drop which is proportional to the current. The meter is calibrated in amps or milliamps but the actual measurement is a tiny voltage.
I am not sure where you are getting the idea that the meter in question is 0-50 mA. That value is no more common than a 0-1 mA or a 0-100 A meter. It just depends on what you are trying to measure. For example, if the original poster is wanting to measure the battery current in his travel trailer, such as I recently did, the most appropriate range in my case was 30A. In this case, an external shunt mounted near the battery was used. A remote millivolt meter using a twisted pair of leads mounted inside the coach was used as the readout. It was configured to measure both drain and charging current, which have opposite polarities. You are trying to use some specific application with which you are familiar as typical but it really isn't. You are absolutely correct that the shunt it always connected in series but it could just as well be mounted remotely as inside the meter.
The original poster hasn't provided enough information so far to accurately answer his question.
'getting the idea' - because most Chinese laser tubes have an about 25-30mA upper limit, so an 0-50 is appropriate and I guess, normal. (my machine came with 0-30 meters FWIW)
========================================
ELEVEN - rotary cutter tool machines
FOUR - CO2 lasers
THREE- make that FOUR now - fiber lasers
ONE - vinyl cutter
CASmate, Corel, Gravostyle
I got the idea is was a mA meter since this is a Laser Forum not a trailer or car one. 0-50 or 0-30 mA is the most commonly installed on glass tube DC Chinese lasers. As an electrician I have installed hundreds of shunts and amp meters.
A look back on his Recent posts shows he is replacing his 80 watt tube.
Last edited by Bill George; 02-06-2019 at 1:30 PM.
Retired Guy- Central Iowa.HVAC/R , Cloudray Galvo Fiber , -Windows 10
If this were a simple panel ammeter install, then why would the original poster be asking about shunts at all? That is why I am saying that he didn't furnish enough information to answer the question.
Art its pretty simple, my guess is he ordered the wrong meter as in one post he stated he was going to add a ammeter. We might never know as he is not posting.
Retired Guy- Central Iowa.HVAC/R , Cloudray Galvo Fiber , -Windows 10