To Measure, a resistor is an essential step taken by technicians when designing or troubleshooting a faulty device. It does not only allow us to choose an appropriate value of resistors to use when designing our circuits. but also to know and be sure that the particular resistor is up to the demand value for the particular project.
If you are finding it difficult to calculate or read a resistor value using a multi-meter, just know that this particular post is for you. Get relax as I work you through how to measure a resistor value using a multi-meter.
Resistors measurements using a multi-meter
As we know earlier before now that, there are two types of multi-meter used in electrical engineering fields. Which is the digital and analogy multi-meter. The analogy multimeter makes use of pointer to indicate values on a calibrated scale. Whereas the digital multimeter displays their digital values on the screen. The digital multimeter is more accurate and reliable compared to analog. This is because it gives the actual value of the measurement in digital value.
measuring the value of a resistor using an anology multimeter.
Measuring a resistor using an analog multimeter can be complicating. However, there are some facts and analogies you need to understand before carrying out the measurements. To make it easy and simple to comprehend you need to know and consider these factors below.
Analogy multimeter responds to the current flowing through the resistor under test. i.e the higher resistance of the resistor, the lower current flowing through it. Making the indicating pointer moves and settle at the Left-hand side of the calibrated scale. while the lower resistance of the resistor means high current flows through it. And the pointer moves and settles in the right hand of the calibrated scales.
Another aspect you need to consider is to make sure you zero the pointer on the calibrated scale. You can do this by touching the two measuring leads and watch the pointer move and rest in the zero scales. Therefore, position the pointer to zero value when the two leads are in contact if it is not at exactly zero value.
The following steps are to follow while measuring the resistor’s values.
Steps to measure the value of a resistor using a digital multimeter.
To measure the value of the resistor using a digital multimeter is the most accurate, reliable, and easy means of measuring resistor. It reduces errors during measurement. This method of measuring resistor displays the values of the resistor on the screen. At the same time, eliminate the error due to parallax compare to analog meter.
In measuring a resistor using a digital multimeter the following steps should be taken into account.
- ON the digital multimeter and connect the measuring lead, black to COM, and red to OHM.
- Position the center knob of the meter to the resistor side of the meter. i.e in the ohm side in the meter
- Position the knob to the scale figure written on the body of the meter depending on the value of resistors measuring. Make sure the knob is the position in the value greater than the value of resistors to be measure. For instance, if am measuring a 1kohm resistor. I can decide to position the center knob to 2kohm value in the body of the meter.
- connect the measuring probes across the terminals of the resistor to be measured. Also, the value of the resistor will display on the screen.