| 摘要 |
PURPOSE:To prevent a large weighing error even if a resistance value of a variable resistor is changed by providing respectively a tap to each connecting point and both ends of fixed resistors connected in series and constituting a variable resistor assembly with two terminals of the variable resistor connected respectively to a prescribed position of said tap. CONSTITUTION:Each connecting point of the fixed resistor r1 is provided with the taps T1-T7 and also both ends of the series circuit are provided with the taps T8, T9. Both ends of a resistor 2a of the variable resistor 2 are provided with terminals 2b, 2c. In changing largely the voltage dividing ratio, the connection between both ends of the resistor 2a of the variable resistor and the fixed resistors is changed and in adjusting the ratio minutely, it is conducted by adjusting the slider of the variable resistor. Thus, the resistance value between the taps T8, T9 is almost depending on the fixed resistor R0 and r1 and even if the slider 2d of the variable resistor is moved because of vibration, the effect of this change is neglected. |
