| 摘要 |
PROBLEM TO BE SOLVED: To allow the manufacturing process of thermometers to be simple and rapid, and to improve the performance of thermometers by selecting combinations of the arrangement of resistances and capacitors. SOLUTION: The IC of the thermometer is provided with a combination of resistances and capacitors and a logic switch control system or a formulized compensation variable table. A preset target values of a software and a hardware are used in a calibration system, and the most suitable arranged combination of sets of the compensating resistances and capacitors is selected and written into a built-in or externally connected memory. The most suitable arranged combination of the compensating resistances and resistances is selected in a serial or parallel method and reserved using a fusing method in which the voltage and current are increased. Thereby, a system oscillating frequency and a voltage value of a power lack alarm signal are easily adjusted to the target values, and the oscillating frequency of a thermistor and its circuit are allowed to be in harmony with the oscillating frequency of an center resistance combined and its circuit. Thereby, such a known thermometer drawback that the manufacturing process is complexed because of requiring the adjustment of combination of the resistances and capacitors using a large amount of manpower can be solved.
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