①The correct jack, function file and range should be used when measuring. If the magnitude of the current cannot be estimated, the test should be started from a high range;
②When testing high current, for safety reasons, each measurement time should be less than 10S, and the interval time should be greater than 15min;
③ When the test lead is inserted into the current jack, do not connect the test lead to any circuit in parallel, otherwise the fuse or even the multimeter itself may be blown.
