Endress+Hauser Proline Promag L 400 - Page 22

Installation Proline Promag L 400 PROFIBUS DP
22 Endress+Hauser
• For information on the liner's resistance to partial vacuum (→  130)
• Information on the shock resistance of the measuring system (→  129)
• Information on the vibration resistance of the measuring system (→  129)
Vibrations
In the event of very strong vibrations, the pipe and sensor must be supported and fixed.
It is also advisable to mount the sensor and transmitter separately.
Information on the shock resistance of the measuring system (→  129)
Information on the vibration resistance of the measuring system (→  129)
L
A0016266
 5 Measures to avoid device vibrations (L > 10 m (33 ft))
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.
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°
A0016359