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.
Qarshilik kontaktlarning zanglashiga olib kelishi bilan o'lchanishi kerak, aks holda hisoblagich yoki elektron plataga zarar yetkaziladi. Ba'zi raqamli multimetrlar qarshilik rejimida kuchlanish signali noto'g'ri ulanganda himoya funktsiyasini ta'minlaydi. DMM larning turli modellari turli xil himoya imkoniyatlariga ega.
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.
Raqamli multimetr qarshilikni o'lchash uchun 0.6V dan kam shahar kuchlanishini ta'minlasa, u diod yoki yarimo'tkazgich bilan ajratilgan elektron plataning qarshilik qiymatini o'lchashi mumkin. Rezistorni olib tashlamasdan sinovdan o'tkazilishi mumkin.
