Endress+Hauser Proline Promag P 200, Technical Information

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Proline Promag P 200
20 Hauser
Horizontal
The measuring electrode plane must be horizontal. This prevents brief insulation of the two measuring
electrodes by entrained air bubbles.
With horizontal orientation, empty pipe detection only works if the transmitter housing is pointing
upwards as otherwise there is no guarantee that the empty pipe detection function will actually respond
to a partially filled or empty measuring tube.
A
A
1
2
3
2
A0016260
å
12 Horizontal orientation
1 EPD electrode for empty pipe detection
2 Measuring electrodes for signal detection
3 Reference electrode for potential equalization
Inlet and outlet runs If possible, install the sensor upstream from fittings such as valves, T-pieces or elbows.
Observe the following inlet and outlet runs to comply with accuracy specifications:
• Inlet run
³
5
´
DN
• Outlet run
³
2
´
DN
5 × DN
³ ³
2 × DN
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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:
• Calculate the ratio of the diameters d/D.
• From the nomogram read off the pressure loss as a function of flow velocity (downstream from the reduction)
and the d/D ratio.
The nomogram only applies to liquids with a viscosity similar to that of water.