Heat meters are unified and combined. Uniform heat meters are composed of blocks that are not certified as a separate means of measurement, so they are calibrated as a whole. Combined heat meter consists of blocks, each of whom is a certified measurement tool with its methods of verification. Heat meters can be single channel – with a single transmitter and multi-channel flow – with two or more flow converters. First used in closed systems, heating, and second – in open heat supply systems and istochnikahteploty. The structure of the energy meter, includes: * the number of computer Heat * primary converters Flow * Resistance Thermometers * Pressure Transmitters.
Types of heat meters of their advantages and disadvantages. Electromagnetic heat meters. Operating principle electromagnetic flowmeters based on the ability of the liquid to initiate an electrical current when it moves in the magnetic field, ie electromagnetic energy meter is used in the phenomenon of electromagnetic induction, which allows to connect high speed, and hence the volume flow of conductive liquid with a field strength in it and the potential difference arising at the diametrically opposite electrodes. Electromagnetic heat meters make the calculation of thermal power and thermal energy on the basis of data on the volume flow and volume of coolant temperature on the forward and return flow from the changing specific heat of the coolant when the temperature difference between inlet and outlet. Because while there are small quantities of current, the electromagnetic heat meters are very sensitive to the quality of installation, the conditions operation.
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