TEMPERATURE MEASURING INSTRUMENT AND RECORDING MATERIAL GUIDING MEMBER FOR IMAGE FORMING DEVICE AND FIXING DEVICE

摘要

PURPOSE:To provide the temp. measuring instrument capable of adequately correcting sensitivity and delay when a thermistor designed to attain the specified sensitivity and time constant is used in a prescribed temp. range. CONSTITUTION:A change speed DELTAg (dg/dt) of temp. is determined in a circuit 3 for determining the change speed of the temp. in accordance with the temp. (g) detected with a temp. sensor 1 and a conversion circuit 2 and the temp. g0 detected in the previous time. To which temp. range the detected temp. belongs among the respective temp. ranges divided to maintain the specified sensitivity and the time constant is judged by a correction circuit 4 for the sensitivity and delay is discriminated and the detected temp. is corrected in accordance with equation f=an.g+bn.DELTAg by the coeffts. (an) and (bn) set for this temp. range.