How to judge the quality of the direct current file (DCA)?
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. If it is 1, switch to a lower range until the effective value appears. , also note the following:
the
A. Please do not input too high voltage, so as not to damage the instrument due to too much current. Commonly used sources that can be input are ordinary batteries, such as No. 5 and No. 7;
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, and adjacent ranges, generally have a relationship of 10 times.
