QJ84產(chǎn)品說明：本產(chǎn)品為導(dǎo)體直流電阻測(cè)試的規(guī)范操作提供依據(jù)適合本公司所有單支、裸絞銅線(包括鍍錫銅)設(shè)備型號(hào)：QJ84型數(shù)字直流電橋主要參數(shù)：量程：20m 、200m 、2 、20 、200 、2k 、20k 測(cè)量范圍：0-19.99m 0-199.99m 0-1.9999 0-19.999 0-199.99 0-1.9999k 0-19.999k R20=Rt K/L K:溫度系數(shù)見下表 L:導(dǎo)體長(zhǎng)度(km) 20=R20/(d2 0.7854) 溫度℃K溫度℃K溫度℃K溫度℃K01.085101.041201.000300.96211.081111.037210.996310.95821.076121.033220.992320.95531.072131.028230.989330.95141.067141.024240.985340.94851.063151.020250.981350.94461.059161.016260.977360.94171.054171.012270.973370.93781.050181.008280.970380.93491.045191.004290.966390.930