Sb2015 - 2 precision decade dc resistance box adopts high resistance superfine glass silk and special high voltage seal switch . it electric performance is very stable and insulation intension is very high . the resistance value can be adjusted under the condition of ceaselessly opening voltage ( note : the using switch should not be at the point of 0 . ) it is easy to operate and suitable to be used as dc resistance standard to calibrate insulation resistance meter 2型精密十进位直流电阻箱采用高阻玻璃微细丝电阻器及独特的高压密封开关，电性能稳定可靠、绝缘强度高、可在不断开测试电压的条件下调节电阻值（正在使用的那只开关不处在“ 0 ”位置时） 、操作方便，适用于检定/校准绝缘电阻表，也可作为直流电阻标准。
