Abstract: A method of determining an enhancement in rust-prevention of treated water by applying an electric current between a first cathode electrode and an anode electrode, and between a second cathode electrode and the anode electrode, wherein the first cathode electrode, the second cathode electrode, and the anode electrode are immersed in treated water; applying a comparative electric current between a first comparative cathode electrode and a comparative anode electrode, and between a second comparative cathode electrode and the comparative anode electrode, wherein the first comparative cathode electrode, the second comparative cathode electrode, and the at least one comparative anode electrode are immersed in untreated water; and determining an antirust effect of the treated water based on a first potential difference across the first cathode electrode and the second cathode electrode, and a second potential difference across the first comparative cathode electrode and the second comparative cathode electrode.

Abstract: A method of determining an enhancement in rust-prevention of treated water by applying an electric current between a first cathode electrode and an anode electrode, and between a second cathode electrode and the anode electrode, wherein the first cathode electrode, the second cathode electrode, and the anode electrode are immersed in treated water; applying a comparative electric current between a first comparative cathode electrode and a comparative anode electrode, and between a second comparative cathode electrode and the comparative anode electrode, wherein the first comparative cathode electrode, the second comparative cathode electrode, and the at least one comparative anode electrode are immersed in untreated water; and determining an antirust effect of the treated water based on a first potential difference across the first cathode electrode and the second cathode electrode, and a second potential difference across the first comparative cathode electrode and the second comparative cathode electrode.

Abstract: A determination device capable of easily and quickly determining an enhancement in rust-prevention of treated water and a method for determining the same are provided. The device has first and second potential difference measurement devices, each including at least one anode electrode, a pair of cathode electrodes, a first current generator for applying an electric current between the anode and a first cathode of the pair, a second current generator for applying an electric current between the anode and a second cathode, an electric current changer for periodically changing a magnitude of a current between the first and second cathodes, a measurement/output equipment for measuring a potential difference across the first and second cathodes, and a determiner for determining antirust effect of treated water based on signal A outputted by the equipment of the first potential difference measurement device and signal B outputted by that of the second device.

Abstract: The power compensating device for battery by this invention comprises a battery 10, a cable 13 that connects this battery 10 to a load 11, a compensating capacitor 12 inserted into the input side of the load 11, a voltage detecting circuit 27 that detects the fluctuation of the input voltage to the load 11, a comparison circuit 28 that compares detected value with referential value, a switching circuit 25 to be controlled by a comparison output, and an auxiliary capacitor 26 connected in parallel, via the switching circuit 25, with the compensating capacitor 12 to sufficiently suppress voltage drop. To this power compensating device it is possible to add a display circuit 29 that displays multistagedly the voltage fluctuation to know visually the effects of voltage fluctuation suppression.