Endress+Hauser Proline Promag W 400 - Inlet and Outlet Runs; Adapters

Proline Promag W 400
28 Endress+Hauser
A
A
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A0016260
 17 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 ≥ 5 × DN
• Outlet run ≥ 2 × DN
5 × DN³
³ 2 × DN
A0016275
No special requirements must be observed at the inlet and outlet runs to keep within the in-
service maximum permissible errors for custody transfer.
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.