Proline Promag 55 PROFIBUS PA
Installation
Hauser
17
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 Circuit (ECC) for applications with fluids producing buildup, e.g. electrically
conductive deposits (
→
see the "Description of Device Functions" manual, BA125D).
• Empty Pipe Detection (EPD) ensures the detection of partially filled measuring tubes, e.g. in the
case of degassing fluids or varying process pressures
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.
a0003206
Fig. 11:
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 or empty.
a0003207
Fig. 12:
Horizontal orientation
1
EPD electrode for empty pipe detection (not for lining made of natural rubber and not for Promag H,
DN 2 to 8 / 1/12 to 5/16")
2
Measuring electrodes for signal detection
3
Reference electrode for potential equalization (not for lining made of natural rubber and not for Promag H)
A
1
2
2
A
3
