What is the HZ gear on the digital multimeter used for?

The HZ range is used to measure the frequency of the voltage signal to be measured, and the stylus does not need to be divided, because the AC signal is neither positive nor negative, and the pulse signal also belongs to the AC signal, as long as the input voltage does not exceed the stylus input limit.

Digital multimeter is a multi-purpose electronic measuring instrument, generally including ammeter, voltmeter, ohmmeter and other functions, sometimes called multimeter, multimeter, multi-purpose ammeter or three-purpose ammeter.

Digital multimeter is suitable for basic fault diagnosis of portable equipment, as well as equipment placed on the workbench. The resolution of some equipment can reach seven or eight digits.

Digital multimeter is an electronic instrument for electrical measurement. It can have many special functions, but its main function is to measure voltage, resistance and current. As a modern multifunctional electronic measuring instrument, digital multimeter is mainly used in physical, electrical and electronic measuring fields.

Resolution:

Resolution is to judge the measurement result of a table. Knowing the resolution of one meter, we can know whether we can see the small change of the measured signal.

If you want to measure the length less than 1/4 inches (or 1 mm), you will definitely not use a ruler with the smallest unit of inches (or centimeters). If the temperature is 98.6 F, it is useless to measure with a thermometer with only integer marks. You need a thermometer with a resolution of 0.1f.

The number of digits and words are used to describe the resolution of the table. Digital multimeters are classified according to the number of digits and words they can display.

A three-digit half table can display three full digits from 0 to 9 and one half digit (only 1 or not). A 3.5-bit digital table can reach the resolution of 1999 words. A 4-and-a-half-bit digital table can achieve the resolution of 19999 words.

The resolution of describing digital tables in words is better than that in bits. The resolution of the 3-bit halfword table is improved to 3200 or 4000 words.

The 3200-word digital table provides better resolution for some measurements. For example, a meter with the word 1999 cannot display 0. 1V when measuring a voltage greater than 200V V. The 3200-word digital meter can still display 0. 1V when measuring 320V voltage. When the measured voltage is higher than 320V and the resolution is 0. 1V, an expensive 20,000-word word table is needed.