Device and method for determining the degree of disinfection of a liquid

摘要

The invention relates to a device and also a method for determining the degree of disinfection, and for determining the time point when a defined degree of disinfection is reached by a liquid, in particular drinking water, that is situated in a container which is light-permeable at least in a UV range. The device comprises in this case a UV measuring appliance for measuring the intensity of the UV radiation in the region of the container, a data analysis unit to which the values of the UV intensity which are measured by the UV measuring device are fed, and wherein the data analysis unit converts the UV intensity values measured at the start of a measurement at defined time points to form a characteristic, and wherein the data analysis unit compares the characteristics determined at defined time points with a predetermined characteristic, which predetermined characteristic corresponds to a defined degree of disinfection of the liquid, and wherein the device comprises at least one signal output appliance which, in the event that the determined characteristics reaches or exceeds the value of the predetermined characteristic, provides the signal output.

主权项

1. A method for determining the degree of disinfection or for determining the time at which a defined degree of disinfection of a liquid, particularly drinking water, which is located inside a container that is transparent in at least one UV region, is reached, comprising the following steps:
measuring the intensity of the UV radiation in the region of the container and determining values for UV intensity, weighting the values for UV intensity with one of:
a temperature of the liquid measured per unit of time; andthe temperature of the liquid measured as a function of time, performing one of:
totaling the values for UV intensity over time; andintegrating the values for UV intensity measured as a function of time, using an analysis unit, converting the values for UV intensity, measured at defined points in time from the start of a measurement, to a characteristic value, characterized in that the analysis unit comprises a counter or is a counter, the counter reading of which increases per unit of time by a counter value which is proportional to the value for UV intensity measured in said unit of time, and in that the predetermined characteristic value corresponds to a defined value for the counter reading, multiplying the counter value by a proportionality factor that is dependent on the temperature, which proportionality factor takes on the value of 1 for a minimal temperature and for temperature values below the minimal temperature, and takes on a value greater than 1, dependent on the temperature, for temperature values above the minimal temperature, comparing the characteristic values calculated at defined points in time with a predetermined characteristic value, which predetermined characteristic value corresponds to a defined degree of disinfection of the liquid, and emitting a signal when the calculated characteristic value reaches or exceeds the predetermined characteristic value.