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Operators' Guidelines for MULTICAL ® 401 Measuring energy 2003 MULTICAL ® 401 heat meter functions in the following manner: The water meter registers the quantity [m 3 ] of district heating water that circulates in the heating installation. The temperature sensors placed in the flow and return pipes register the degree of cooling in the heating installation, i.e. the difference be- tween the inlet temperature and the outlet temperature. Using this information MULTICAL ® 401 is able to calculate the amount of energy consumed. NB: The arrow M indicates the type of measurement displayed. The unit can be seen to the right in the display. MULTICAL ® display When you press the front key and hold it down for one second, a new reading will be displayed. 150 seconds after the key has been activated, the display will return to consumed energy, which is the default. Kamstrup A/S Industrivej 28, Stilling DK-8660 Skanderborg TEL: + 45 89 93 10 00 FAX: + 45 89 93 10 01 WEB: www.kamstrup.com