| 摘要 |
PURPOSE:To avoid display errors by temp. drift by feeding the output signal of a sample holding means back negatively to a weight detecting circuit while a weight detecting element is kept driven. CONSTITUTION:The output signal of an amplifier 8 is the voltage corresponding to the weight of load while a digital switch S1a is on in a section T1 which is a weighing mode section. This voltage is sampled by a weight holding circuit 10. The voltage signal is arithmetically processed in an operation processor 13 via a low pass filter circuit 11 and an A/D converter 12, whereafter a display signal is outputted to a display part. When digital switches S1b, S2b turn on in the section T2 which is an offset detecting mode section, the output voltage of the amplifier 8 is the voltage corresponding to the sum total of the offset voltages. Said voltage is sampled by an offset voltage holding circuit 9. |
