How to judge the quality of the DC current range (DCA) of the multimeter?
Answer: If there is a known current source, input it directly in the current range. If not, it doesn't matter. Just input the voltage in the current range. value, please also note the following:
A. Please do not input too high voltage, so as not to cause too much current and damage the meter. Commonly used sources that can be input are ordinary batteries, such as No. 5, No. 7, etc.;
B. When measuring the current of the input voltage, because the resistance (load) of the internal resistance of the instrument is very small, if the input is too long, the source will be damaged, so try not to exceed 5 seconds for a single input;
C. Each high and low range, adjacent ranges, generally have a relationship of 10 times.
