IMPROVED DEVICE FOR ACCURATELY MEASURING PHYSICAL QUANTITY AND METHOD FOR VERIFYING CORRECT OPERATION OF THE SAME

摘要

PROBLEM TO BE SOLVED: To enable the self-diagnosis of the correct operation of a device while the device is being used even in the case of the installation of a single device. ;SOLUTION: This device is constituted of a closed circuit network. The branches of the closed circuit network are constituted of at least one Wheatstone bridge 1. The Wheatstone bridge 1 is continuously connected to a power source 3 and is connected in parallel to a resistive branch 4 constituted of at least two serially connected resistances R7 and R8. The first point 5, which is a contact for a bipolar-system device for measuring potential differences, is set between the resistances R7 and R8. The second and third alternative connecting points 6 and 7 of this device are arranged at the branches of the bridge 1.;COPYRIGHT: (C)2000,JPO