| 摘要 |
PURPOSE:To improve operability by prohibiting the automatic range control function when a zero adjusting function and an adjusting function are performed. CONSTITUTION:When neither the zero adjusting function non the adjusting function is performed, as no adjusting signal is inputted from an adjusting input terminal 1, the adjustment display signal 11 goes to the L level and the NOR gate is opened. Depending on the presence of a control signal to be applied to a manual range control input terminal 3, a manual range clock signal 10 or an automatic range clock signal 9 is inputted into a range control circuit 8 passing through NOR gates 6 and 7. As soon as an adjusting signal is inputted into the terminal 1, an adjustment detection circuit 2 words to turn the adjustment display signal 11 to the H level to close the NOR gate 7 and a range clock signal is prohibited to fix the range. |
