TEMPERATURE CHARACTERISTIC TESTING DEVICE FOR PRESSURE SENSOR AND METHOD OF TESTING TEMPERATURE CHARACTERISTIC

摘要

PROBLEM TO BE SOLVED: To reduce the number of cable wirings from a thermostat to the outside. ;SOLUTION: A temperature characteristic testing device A has a pressure applying means 1 for applying designated pressure to a plurality of pressure sensors 3₁-3n and a switching means 2 including a plurality of semiconductor relays Ry... for driving one of the pressure sensors 3₁-3n and sequentially switching the pressure sensors 3₁... providing an output. Operation of the switching means 2 is controlled by a control signal provided from an exterior control device 7. Output from the respective pressure sensors 3₁... is entered in measuring devices 5, 6 through the switching means 2. Drive current of the pressure sensors 3₁... is supplied from a constant current source 4 through the switching means 2. Since the switching means 2 for switching the plurality of pressure sensors 3₁... are mounted inside the temperature characteristic testing device A, number of cables drawn out a thermostat can be reduced.;COPYRIGHT: (C)1998,JPO