Installation Promag 53 PROFIBUS DP/PA
14 Endress+Hauser
3.2.3 Orientation
An optimum orientation position helps avoid gas and air accumulations and deposits in the
measuring tube. Promag, nevertheless, supplies a range of functions and accessories for
correct measuring of problematic fluids:
• Electrode Cleaning Circuitry (ECC) to prevent electrically conductive deposits in the
measuring tube, e.g. for fluids causing buildup (see "Description of Device Functions"
manual).
• Empty Pipe Detection (EPD) ensures the detection of partially filled measuring tubes or in
the case of degassing fluids → 125.
Vertical orientation
A vertical orientation is ideal in the following cases:
• For self-emptying piping systems and when using empty pipe detection.
• For sludge containing sand or stones and where the solids cause sedimentation.
A0011903
Fig. 10: Vertical orientation
Horizontal orientation
The measuring electrode plane should be horizontal. This prevents brief insulation of the
two electrodes by entrained air bubbles.
"
Caution!
Empty Pipe Detection functions correctly with the measuring device installed horizontally
only when the transmitter housing is facing upward (see diagram). Otherwise there is no
guarantee that Empty Pipe Detection will respond if the measuring tube is only partially
filled.
A0011904
Fig. 11: Horizontal orientation
1 EPD electrode for empty pipe detection
(not available for "measuring electrode only" option, not in Promag H, DN 2 to 15 (1/12 to ½"))
2 Measuring electrodes for signal detection
3 Reference electrode for potential equalization
(not available for "measuring electrode only" option, not in Promag H)
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