Standard connection diagram for Volt meter and amp meter
Posted: Fri Jun 12, 2009 12:18 pm
Most meters are in common ground design. The volt meter is able to monitor it's own supply voltage simply by connecting the "+" input to the power (+) terminal and leave the Negative (-) unconnected.
For an amp(current) meter, you got to be careful about the looping feedback from the shunt. To avoid the problem, you better to install a dc-dc isolated power module to provide it an independency power to the meter
For an amp(current) meter, you got to be careful about the looping feedback from the shunt. To avoid the problem, you better to install a dc-dc isolated power module to provide it an independency power to the meter