How to Measure resistance of digital multimter Professional?
Resistance is measured at the electrical barrier. Resistance values vary widely, from a few milliohms (mΩ) for contact resistance to billions of ohms for insulation resistance. Many DMMs measure resistances as small as 0.1 ohms, and some measurements can be as high as 300 megohms (300,000,000ohms). If the resistance is extremely large, the Fluke multimeter will display "OL", indicating that the measured resistance exceeds the range. When measuring an open circuit, "OL" is displayed.
Kev tiv thaiv yuav tsum tau ntsuas nrog lub zog hluav taws xob tawm, txwv tsis pub kev puas tsuaj rau lub ntsuas hluav taws xob lossis lub rooj tsav xwm hluav taws xob yuav tshwm sim. Qee qhov digital multimeters muab kev ua haujlwm ntawm kev tiv thaiv thaum lub teeb liab hluav taws xob tsis raug txuas nrog hauv hom tsis kam. Cov qauv sib txawv ntawm DMMs muaj peev xwm tiv thaiv sib txawv.
For accurate measurements of low resistance, the resistance of the measuring lead must be subtracted from the measured value. Typical test lead resistance values are between {{0}}.2Ω and 0.5Ω. If the resistance of the test leads is greater than 1Ω, the test leads should be replaced.
Yog tias cov khoom siv digital multimeter muab tsawg dua 0.6V DC voltage los ntsuas qhov tsis kam, nws tuaj yeem ntsuas qhov ntsuas tus nqi ntawm Circuit Court board cais los ntawm diode lossis semiconductor. Nws tuaj yeem kuaj tsis tau tshem tawm cov resistor.
