How to use a multimeter to test the quality of a light bulb
Use the resistance gear of the pointer meter (refer to choose RX1 or RX10) and adjust the zero point, and touch the two test pens to the two terminals of the bulb. If the bulb is good, it will indicate a certain resistance value (the resistance value will be different for different bulb power).
If it indicates ∞ or 0, it means that the light bulb has been damaged, ∞ means no connection, and 0 means short circuit! unavailable! If a digital meter is used, the 200 or 2k resistance range is selected and zero adjustment is not required. The state of ∞ displays 1.
