Measurement Range and Measurement Rate of Digital Multimeters
measuring range
In a multifunctional digital multimeter, different functions have their corresponding maximum and minimum values that can be measured.
Measurement rate
The number of times a digital multimeter measures the amount of electricity being measured per second is called the measurement rate, which is measured in seconds. It mainly depends on the conversion rate of the A/D converter. Some handheld digital multimeters use measurement cycles to indicate the speed of measurement. The time required to complete a measurement process is called the measurement cycle.
There is a contradiction between measurement rate and accuracy indicators, usually the higher the accuracy, the lower the measurement rate, and it is difficult to balance the two. To solve this contradiction, different display bits or measurement speed conversion switches can be set on the same multimeter: a fast measurement mode can be added, which is used for A/D converters with faster measurement speeds; By reducing the number of display bits to significantly improve measurement speed, this method is commonly used and can meet the needs of different users for measurement speed.
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 is mainly used to check whether the resistance value is accurate. Set it to the ohm range, connect the two pins of the multimeter casually with a probe, and see if the reading of the multimeter is the same as the actual resistance value of the resistor.
3. Measuring inductance coil: The main purpose of measuring inductance coil is to check whether it is conducting, and it is also in the ohm range. Simply connect the two pins of it with a probe, and the inductance is basically a wire. To measure its resistance, it should be very small.
4. Transformer measurement: Transformer measurement and inductance measurement share many similarities.
