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Volumetric flow equation (Nozzle) calculation 2-40 V = a.c· Ag 1,00 The flow and expansion coefficients for diameters the range 65mm to 500mm are taken from DIN 1952. Orifice cross-section de 14mm Flow speed 4-V d-18.5mm A-153.9mm Fig. 4.17 Nozzle cross-section A-208.8mm Experimental procedure Once either the orifice or nozzle has been fitted in the measuring object, it is installed in measuring section VI. NOTICE Ensure the correct direction of flow. When installing the measuring objects, it must be ensured that the sealing rings are property fitted in the groove. Union nuts should only be hand tight. The pressure gauge is connected as described in Chapter 5.2.1, Page 59. The volumetric flow is set using the shut-off valve in the measuring section (head loss). NOTICE The measuring connections on the measuring object are used, not those on the measuring sec- tion. Experiment 3

The flow and expansion coefficients for diameters the range 65mm to 500mm are taken from DIN 1952. Orice cross-section Flow speed d-14mm 18.5mm A-153.9mm Fig. 4.17 Nozzle cross-section A-208.8mm Experimental procedure Once either the orifice or nozzle has been fitted in the measuring object, it is installed in measuring section VI. NOTICE Ensure the correct direction of flow. When installing the measuring objects, it must be ensured that the sealing rings are property fitted in the groove. Union nuts should only be hand tight. The pressure gauge is connected as described in Chapter 5.2.1. Page 59. The volumetric flow is set using the shut-off valve in the measuring section (head loss). NOTICE The measuring connections on the measuring object are used, not those on the measuring sec- tion. Experiment 3 Nozzle measurement: p in kg/m¹ 4pin mbar V in Umin Vin Vmin measured calculated 998,2 1 998,2 1 A 1 1 !!!! Variance in %