Digital multimeter screen has a digital display function can not be used, how can it be used?
First, you need to determine the nominal resistance value of your resistor, to know: common resistance from zero point a few ohms to tens of megohms (one megohm is equal to one million ohms) are possible. Determine the nominal resistance value first, and then select the range of the multimeter. If it is a digital meter, there is no reading for resistance values over the range (displayed as infinity). Pointer multimeter, more than the range is too much, the pointer can not swing swing, or just slightly move a little. Only if the range is greater than the resistance value of the resistor being measured, you can get a reading.
You multimeter to measure the resistance selection bit that gear. It is best to first select the high resistance gear from the high resistance gear to low resistance gear selection, can improve the accuracy of resistance readings. Some high resistance hundreds of K a few thousand K resistance value is low, low resistance reading can not show the resistance value. Some resistors can be used, if the high resistance gear can not measure the resistance value, the resistor can not be used. For reference.
Using a digital multimeter, the on-off gear can not measure the resistance value, at least not allowed.
You use the ohm gear 2M ohm gear, measurement does not respond, said the resistor open circuit, that is, bad, replace with a new one!
Five-colour ring resistor can not measure the resistance value of the resistor, there are only two possibilities, one is a bad meter. Rather, the resistor is open circuit (infinity)!
Resistance value becomes
Large, unstable resistance value, resistance open circuit, is a common fault of the resistor.
