Why doesn't the digital multimeter return to zero when it is short-circuited at 200Ω?
Answer: In the 200Ω range, due to the resistance value of the line, the internal resistance of the meter and the contact point, some mantissas are normal when short-circuiting. This mantissa will become larger and larger in use and cannot be adjusted. plate, close contact points to reduce the value. In use, short circuit first, and write down the value, then subtract it in the measurement.
