Introduction to Digital Multimeter Resolution
The voltage value corresponding to the last word on the lowest voltage range of a digital multimeter is called resolution, which reflects the sensitivity of the instrument. The resolution of digital instruments increases with the number of displayed digits. The highest resolution indicators that a digital multimeter with different digits can achieve are different.
The resolution index of a digital multimeter can also be displayed using resolution. Resolution refers to the percentage of the minimum number (excluding zero) that the instrument can display to the maximum number.
It should be pointed out that resolution and accuracy belong to two different concepts. The former characterizes the "sensitivity" of the instrument, that is, the ability to "recognize" small voltages; The latter reflects the "accuracy" of the measurement, that is, the degree of consistency between the measurement results and the true value. The two are not necessarily related, so they cannot be confused, let alone mistakenly assume that resolution (or resolution) is similar to accuracy, which depends on the comprehensive error and quantization error of the internal A/D converter and functional converter of the instrument. From a measurement perspective, resolution is the "virtual" indicator (independent of measurement error), while accuracy is the "real" indicator (which determines the size of measurement error). Therefore, increasing the number of display digits arbitrarily to improve the resolution of the instrument is not feasible.
Introduction to Measuring the Internal Resistance of Lithium Batteries with a Multimeter
1. Electricity measurement: electricity measurement is mainly to measure whether the impulse discharge is good or bad, adjust to the ohm gear, and then use two probes to connect its two legs respectively. At this time, the number of the meter will slowly increase, and finally become infinite, and then change the probe. The situation is the same as before.
2. Resistance measurement: Resistance measurement mainly involves measuring whether the resistance value is accurate. Set it to the ohmic range, connect its two pins with a probe, and check if the reading on the multimeter is the same as the actual resistance value of the resistance.
3. Inductance measurement coil: Inductance measurement coil is mainly used to measure whether it is conductive, which is also in the ohmic range. Feel free to use a probe to connect its two legs. The inductance is simply a wire, and its resistance value should be very small to measure.
4. Transformer measurement: There are many similarities between measuring transformers and inductance.
