METHOD FOR OPERATING A PROBE OF A THERMAL FLOW METER, AND THERMAL FLOW METER COMPRISING SUCH A PROBE

摘要

The invention relates to a method for operating a probe (10) of a thermal flow meter (1), the probe comprising a printed circuit board (14) on which at least one first sensor (11) and a second sensor (12) designed to sense the temperature of a medium and at least one heating element (13) designed to heat the medium are located, at least one first sensor being located in a flow shadow of the heating element and being designed to be heated by the medium that is heated locally by means of the heating element, the second sensor being located outside the flow shadow of the heating element, at least the first sensor to be heated being used for a first flow rate measurement, and the second sensor being used for a second flow rate measurement, wherein the at least one first sensor is operated in a first measurement range for a flow rate measurement, and the second sensor is operated in a second measurement range for a flow rate measurement.