| 摘要 |
PROBLEM TO BE SOLVED: To provide a device for measuring environment that can improve measurement accuracy in a low-humidity-region measurement mode including a switching point by simple configuration. SOLUTION: Approximate conversion relative humidity is measured before a routine for measuring actual temperature and humidity. Based on a temperature signal and a humidity signal in a middle/high humidity measurement mode, a CPU 120 obtains the approximate conversion relative humidity (HUM1) in a reference resistance value and in the middle/high humidity measurement mode. Then, based on the temperature signal and the humidity signal in the low/ humidity measurement mode, approximate conversion relative humidity (HUM2') in the reference resistance value and in low-humidity measurement mode is obtained. The CPU 120 calls the HUM1, and corrects a numerical formula for obtaining the approximate conversion relative humidity in the low-humidity measurement mode. After that, a switch 123 is changed over to the side of a thermistor 103, and a switch 124 is changed over to the side of a humidity sensor 104 for shifting to a normal mode. |
