HUMIDIFICATION CIRCUIT CONTROL DEVICE OF ENVIRONMENTAL TEST INSTRUMENT AND CONTROL METHOD OF THE HUMIDIFICATION CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide a humidification circuit control device of an environmental test instrument in which optimum wait time is set at the time of initial water feeding of a humidification vessel, and water is fed without changing temperature and relative humidity at the time of a humidity normal operation of the humidification vessel.

SOLUTION: The humidification circuit control device 8 of the environmental test instrument 1 for controlling a small capacity pump 6b and a humidification heater 5b by detecting a water level of the humidification vessel 5a with a water level detection sensor 8a. The small capacity pump 6b has an automatic switching function of intermittent driving and continuous driving. The humidification circuit control device 8 of the environmental test instrument 1 has a water feeding means 6 for switching driving condition of the small capacity pump 6 to be intermittent driving or continuous driving while detecting the water level of the humidification vessel 5a with the water level detection sensor 8a and a humidification heater control means 7 for changing conducting state to the humidification heater 5b to be start or stop while detecting the water level of the humidification vessel 5a with the water level detection sensor 8a.

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