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分路式电位差计,因分路盘的影响,在作精密测试时,要对示值进行附加更正值的计算。根据JJG_(123)-76“直流电位差计试行检定规程”的规定,分路盘附加更正值ΔU的计算公式为: ΔU=X_2·KN/M[ΔU_(X_1+m)~I|x_2=0-ΔU_(X_1)~I|X_2=0 -ΔU_m~I|x_2=0] (1)式中,Ⅰ——被分路盘;Ⅱ——表分路盘; K——Ⅱ盘与Ⅰ盘步值的比值; m——Ⅱ盘分路Ⅰ盘的电阻个数; N——分路系数(由有关电阻的名义值
Split-type potentiometer, due to the impact of splitter plate, in making a precision test, the value of the additional correction to be calculated. According to the provisions of JJG_ (123) -76 “Test Procedure for Verification of DC Potentiometer”, the additional correction value ΔU for the splitter plate is calculated as: ΔU = X_2 · KN / M [ΔU_ (X_1 + m) ~ I | x_2 = 0-ΔU_ (X_1) ~ I | X_2 = 0 -ΔU_m ~ I | x_2 = 0] (1) where I is the shunted disk; Ⅰ step value ratio; m - Ⅱ disk shunt I disk number of resistance; N - shunt coefficient (by the nominal value of the resistance