How to use a multimeter?

  There won’t be anything serious if you confuse the polarity of measuring voltage a minus will appear on a display.

 
That’s Chinese precision. There is nearly 10 volts in dead battery!
 
  Now we'll do the alternate current measurement in house lighting circuit. Choose the needed switch position and measure it. You should be very careful during this procedure, because if the position will be wrong the device would brake. It’s needless to say that you should check leads and probes isolation before testing.
 

 Resistance measuring.
 Here's all the same. Set the multimeter measuring limit and begin measuring. It’s 677 ohm, super precision, resistor nominal is 680 ohm! 
 

  Here we have a possibility to measure diodes, but this function didn’t work since manufacturing. With its help you can check diode polarity, and electron-hole junctions p-n.