Method and device for detecting conductivity in instant electric water heater
An electric water heater, instant heating technology, applied in the direction of fluid resistance measurement, etc., to achieve the effect of simple cost
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[0035] figure 1 The schematic diagram of shows the two channel walls 1 of the channel for guiding the water 2 , the water thus being the measurement medium whose conductivity or resistivity is to be detected here. Two electrodes 3 , which can also be referred to as probes 3 , are guided liquid-tight through one of the channel walls 1 in order to conduct a measurement current between them for detecting the conductivity of the water 2 or of the measurement medium 2 . The electrode 3 is connected to its secondary side 52 at the transformer 5 . The transformer 5 is supplied with a primary-side alternating voltage on its primary side 51 , which is generated by the alternator 6 . For this purpose, the alternator 6 is activated by means of corresponding switching signals from a microcontroller 7 , which is also called μController for short. The alternator 6 thus generates an alternating voltage via pulse width modulation, which is thus input at this primary side 51 of the transform...
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