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.
Resistansi harus diukur dengan daya sirkuit dimatikan, jika tidak, kerusakan pada meteran atau papan sirkuit akan terjadi. Beberapa multimeter digital memberikan fungsi perlindungan ketika sinyal tegangan salah terhubung dalam mode resistansi. Model DMM yang berbeda memiliki kemampuan perlindungan yang berbeda.
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.
Jika multimeter digital memasok tegangan DC kurang dari 0.6V untuk mengukur resistansi, multimeter digital dapat mengukur nilai resistansi papan sirkuit yang diisolasi oleh dioda atau semikonduktor. Itu dapat diuji tanpa melepas resistor.
