Heat transfer metering in public indoor pool

Through Internet searches the "swimming friends" found systec's deltawaveC-P flow and heat transfer meter. The non-intrusive clamp-on flowmeters aroused their interest. A date had been agreed in the indoor pool. With deltawaveC-P, the clamp-on ultrasonic meter, comparative measurements were made and recorded 25h by the internal data logger. The Excel evaluation shows all measured data.

More than 5% deviation from MID

As Klaus Berels, responsible for the sales systec Controls "Mid West", Wesel, determined with the careful measurement test, dodged the measurement data obtained with the P-deltawaveC more than 5% of the values of the fixed MAG meter. The application engineer says: "This demonstrates a fundamental problem that can tamper the medium-dependent MIDs. The measuring electrodes of MAG-meters are object of deposits over the years of operation and thus they may show significant errors. In this specific case, this could be due to virtually no more removable magetite deposits: Hot water forms magnetite deposits that lead to incorrect measurements. Low pH, high conductivity and the oxygen content of the water result in systems with steel components for such magnetite slurries. Magnetite is ultimately a critical component of deposits in heat meter components. But with the ultrasonic clamp-on flow meter deltawaveC-P we measure from the outside of the pipe, without direct contact with the medium. Since there are no such measurement errors, Hunxes "swimming friends" now locate possible sources of error and are able to make improvements.