If the measurement voltage of a digital multimeter is halved, it may be a fault due to the following reasons:
First check whether the battery is exhausted or the battery is in poor contact, resulting in inaccurate reading of the multimeter.
Second, there may be a loose connection line or joint in the measurement circuit, causing the voltage to halve.
In addition, the failure or damage of the internal components of the multimeter may also be the cause of the voltage halving. To troubleshoot the problem, you need to replace the battery, check the cables and connectors, and finally you may need to repair or replace the internal components of the multimeter. After these steps, you can find and solve the voltage halving fault.
First check the measuring chip range of the multimeter is what?