Title: +135.01=370.003-OE401T_02-320 Datablad Energimåler UH50.._.pdf
Ultrasonic measuring principle The flow is acquired based on the non-wear ultrasonic measuring principle, which requires no moving parts. The quantity of energy supplied to the consumer by the medium during a certain period of time is proportional to the temperature differential of flow and return and the volume flow passing through the meter. The water volume is measured in the measuring tube by ultrasonic pulses which are transmitted in the direction of flow and against the direction of flow. Downstream, the time required by the pulses to travel from the transmitter to the receiver is reduced, upstream it is increased. The water volume is calculated based on the difference in runtime. The flow and return temperatures are determined using platinum resistors. The water volume as well as the temperature difference between the warmer and cooler side is multiplied using a heat coefficient and the product is integrated. The result, which is the consumed heating or cooling energy quantity, is registered and