Endress+Hauser Proline Promag H 500, Руководство по эксплуатации

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Installation Proline Promag H 500 PROFIBUS DP
26 Hauser
Vibrations
L
A0029004
 7 Measures to avoid device vibrations (L > 10 m (33 ft))
In the event of very strong vibrations, the pipe and sensor must be supported and fixed.
• Information on the shock resistance of the measuring system →  218
• Information on the vibration resistance of the measuring system →  218
Adapters
Suitable adapters to DIN EN 545 (double-flange reducers) can be used to install the sensor
in larger-diameter pipes. The resultant increase in the rate of flow improves measuring
accuracy with very slow-moving fluids. The nomogram shown here can be used to
calculate the pressure loss caused by reducers and expanders.
• The nomogram only applies to liquids with a viscosity similar to that of water.
• If the medium has a high viscosity, a larger measuring tube diameter can be
considered in order to reduce pressure loss.
1. Calculate the ratio of the diameters d/D.
2. From the nomogram read off the pressure loss as a function of flow velocity
(downstream from the reduction) and the d/D ratio.
100
10
0.5 d / D
[mbar]
0.6 0.7 0.8 0.9
1 m/s
2 m/s
3 m/s
4 m/s
5 m/s
6 m/s
7 m/s
8 m/s
1
D
d
max. 8°
A0029002