How to use a digital multimeter
AC gear: responsible for measuring the AC voltage, and rotate the middle rung to the AC gear (the "~" symbol added to the voltage unit V indicates AC).
Resistance gear: Rotate the middle rung to the gear with Ω.
Current gear: Rotate the middle rung to the gear with current unit A (where A- means test DC current, A~ means test AC current).
Buzzer/diode gear: measure continuity.
hFE test socket: measure the polarity of the triode.
According to the above introduction, measure as required, and select the appropriate gear and range.
