The principle of measuring resistance with a multimeter
Using a multimeter to measure resistance, current reading is actually reading, just R = 0 when measuring current: I = U/ (Rg+R +R) marked as R = 0, no current, resistance in standard without hindrance, and I is a function of the relationship, they are not simply proportional the relationship between. With different resistors, the R is different, R = 0, the I is different, so before each measurement, it should be zero.
Its internal battery voltage, Rg is the meter's resistance, R fixed, with the meter in series with a fixed value resistor, R tune, zero adjustable variable resistance, R measurement, to measure the resistance. Because of the size and range of resistance to be measured, useThe fixed value resistance is also different, which makes the meter be divided into several stalls.
And its fixed resistance. The current is calculated when our test resistance is equal to zero. So we come up with a formula: I = U/ (Rg+R, +R, U, +R)
The principle of measuring resistance by a multimeter is based on Ohm's law. In a multimeter, its voltage is the voltage of the battery. It has several resistances, including the resistance we want to test, and its adjustable resistance
