Sunday, 5 February 2012

All About Resistors part-9


Resistance Measurement by Using Multimeter: 
There are a few simple steps required to make a resistance measurement with a digital multimeter:
1.      Select the resistance that needs to be measured and estimate what the resistance may be.
 
2.      Insert the probes into the required sockets. The digital multimeter will have several sockets for the test probes. Insert these or check whether they are already in the correct sockets.
 
3.      Turn on the multimeter.
 
4.      Select the required range.  When the digital multimeter is on, the required quantity that is voltage, current or resistance and its range can be selected. The range selected should be such that the best reading is obtained. Normally, the multimeter function switch will be labeled with the maximum resistance reading. Choose the one where the estimated value of resistance will be under but close to the maximum of the range. In this way, the most accurate resistance measurement can be made.
 
5.      Make the measurement. The probes can be applied to both the two terminals of the resistor. The range can be adjusted if necessary. The value of the resistor is shown on the mutimeter display.
 
6.      Turn off the multimeter:  Once the resistance measurement has been made, the multimeter can be turned off to preserve the batteries. It is also wise to turn the function switch to a high voltage range. In this way, if the multimeter is used again for another type of reading, then no damage will be caused if it is inadvertently used without selecting the correct range and function.
ssource:engineersgarage.com

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