Vega VEGAPULS 68 - Page 74

74
11 Supplement
VEGAPULS 68 • Foundation Fieldbus
36538-EN-170405
Torques
Max. torques, antenna system
Ʋ Mounting screws, antenna cone 2.5 Nm (1.8 lbf ft)
Ʋ Compression nut, parabolic antenna 50 Nm (36.89 lbf ft)
Ʋ Counter nut, parabolic antenna 40 Nm (29.50 lbf ft)
Ʋ Terminal screws, swivelling holder 15 Nm (11.06 lbf ft)
Max. torques for NPT cable glands and Conduit tubes
Ʋ Plastic housing 10 Nm (7.376 lbf ft)
Ʋ Aluminium/Stainless steel housing 50 Nm (36.88 lbf ft)
Input variable
Measured variable The measured quantity is the distance between the end
of the sensor antenna and the product surface. The ref-
erence plane for the measurement is the sealing surface
onthehexagonorthelowersideoftheange.
3
4
2
1
Fig. 55: Data of the input variable
1 Reference plane
2 Measured variable, max. measuring range
3 Antenna length
4 Utilisable measuring range
Max. measuring range 75 m (246.1 ft)
Recommended meas. range depending on the antenna diameter
Ʋ ø 40 mm (1.575 in) up to 15 m (49.21 ft)
Ʋ ø 48 mm (1.89 in) up to 20 m (65.62 ft)
Ʋ ø 75 mm (2.953 in) up to 40 m (131.2 ft)