This 3 Wires 0.28-inch Digital Voltmeter DC 0-100V Red Light LED Panel Voltage Meter designed explicitly for Vehicles Motor. It is a perfect tool for most applications and consumes less than 30mA from the target voltage source to power itself. The 3 wires on the panel meter display module hook up to the target voltage point. And measure the voltage reading on the 3 digits seven segment display.
This is highly accurate and compact-sized digital voltmeter comes with an LED Display. In this module, the voltmeter uses 0.28-inch digital tube display, with a super small volume. To achieve the best measurement precision, the voltage measured according to the different automatic moving positions of the decimal point. During the connection, the red wire is to connect to the positive pole, and the black wire is to connect to the negative pole. Yellow/white wire connected to the positive pole of that source or another source across which we meant to measure the voltage. While measuring the supply voltage of another source make sure that the negative pole is joined common. As the module features reverse polarity protection, there is no need to worry if there exists any mismatch while connecting.
This voltmeter used to measure the storage battery’s voltage in motorcycles and cars and also grasp the storage battery’s status. Also used to measure other voltage. 30V is the voltmeters maximum operating limited voltage. To avoid voltmeters permanent damage because of an electrical spark, power supply ripple, or other too high abrupt change of voltage, leave enough margin when working.
This voltmeter doesn’t need external drive working power, it can work with measuring voltage, the working voltage’s range is 5-24V. In order to obtain high measurement accuracy, the position of decimal points moved automatically according to the different measuring voltage. When the measured voltage below 10V, it displays two places after the decimal point. Whereas when it measures above 10V, it will display one place after the decimal point.