Methods for Measuring Four Resistors of Different Resistance Values with a Multimeter
The use of multimeters is very extensive, with a wide variety of components. For an electronics enthusiast, using a multimeter to the fullest is a very helpful thing; Resistance is a component and one of the commonly used components, with a wide variety of types, such as metal resistors, wire wound resistors, piezoelectric resistors, photoresistors, and so on. This article mainly conducts several experiments to help everyone become more familiar with the use of a multimeter, especially the operation of the multimeter's resistance mode:
1. When measuring resistors less than 50 Ω
Set the multimeter to the R * 1 position, connect the meter rod to the two pins of the resistor, and the pointer should turn to the right, pointing to the nominal value of the resistor. If the measurement result differs greatly from the nominal value, the gear must be zeroed first. If the zeroing is correct, it means that the resistance value of the resistor is incorrect and the resistor is damaged.
2. When measuring resistors ranging from 50 to 500 Ω
The gear position is different from measuring a 50 Ω resistance value. The multimeter gear needs to be set to R * 10, and the wiring method is the same as that of a 50 Ω resistor. The reading must be taken carefully, and the correct resistance value should be set to * 10 Ω on the original basis. If the measurement of R * 10 gear is inaccurate, it should be zeroed in the current gear, and then measured through the above steps to obtain the correct resistor resistance.
3. When measuring resistors ranging from 500 to 1K Ω
The multimeter needs to be placed in the R * 100 range, and the wiring method is the same as 50 resistors. The reading naturally needs to be increased, and it can be increased by 100 Ω on the original basis.
4. When measuring resistors ranging from 1 to 50K Ω
Firstly, place the multimeter in the resistance R * 1K range, and the wiring method is the same as the three above. The values read in the table also correspond to * 1K Ω.
If the pointer doesn't move, then we need to first consider the power issue and prioritize checking whether the battery of the multimeter is properly installed; If the pointer is excessively biased towards the left position during the use of the resistance mode, it indicates that the range selection is incorrect and needs to be re selected before performing the above steps to obtain the correct value.
Through the measurement tests of the resistance values of the four types of resistors mentioned above, it can be found that regardless of which resistance value is measured, the wiring method used is the same, which is to connect the meter rod to the two pins of the resistor at will (see the figure below). When measuring different resistance values, it is necessary to understand the approximate resistance value of the device in advance and set the gear to the corresponding position. If you do not know, you should first set it to the large range. If it is too large, slowly set it to the small range to prevent damage to the multimeter.
