Key differences between pointer and digital multimeters
Digital multimeter than pointer multimeter in the measurement, reading accuracy and sensitivity are higher, the internal resistance is larger, in the measurement of voltage, digital closer to the ideal measurement conditions. At the same time the digital multimeter measurement function is more, such as measuring capacitance capacity, temperature, frequency and so on.
When digital multimeter measures dynamic process, the number jumps, which can't reflect the dynamic change process well. Pointer multimeter can well reflect the continuous change process and change trend of the quantity, and observe the dynamic process more intuitively.
When measuring DC voltage or current, if the polarity of pointer type multimeter is reversed, the pointer will be reversed, while the digital type can automatically identify and display the polarity, such as negative figures, there is a "-" sign in front of the negative figures.
When the pointer multimeter is used to measure the voltage and current over the range, the pointer will deviate to the right to the limit position, which is easy to damage the meter head or make the accuracy become low. The digital multimeter displays 1, indicating that it is out of range, which is the same when measuring resistance.
Pointer multimeter according to the pointer and dial readings, easy to produce human error, while the digital eliminates human error, but the digital multimeter is susceptible to interference, and digital jumps, to determine the digital value of the trouble, generally take the middle value, in some cases to take the minimum or maximum value.
In view of the pointer multimeter and digital multimeter have their own advantages, so it is recommended that the two tables with the best, in general, or digital multimeter is much better, more functional, should be the first choice.
Pointer multimeter selection skills:
Multimeter horizontal, vertical, flat state placed on the pointer in the zero position, indicating that the accuracy of the multimeter is higher, and then some resistance, voltage measurement, see whether the function of the file is good, how accurate, if necessary, you also need to take a look at the instruction manual.
