Berthold MicroPolar LB 566, Руководство пользователя

Страница: 36 / 176

Chapter 4. Getting Started
36 MicroPolar (++) LB 566
4.2
Commissioning the FlowCell
4.2.1 Installing the FlowCell
Note the following points when installing the FlowCell:

The FlowCell is integrated at a suitable location in the pipe-
line system. Keep in mind that material sampling directly
behind the FlowCell should be possible for calibration.

The FlowCell should be installed in a vertical riser, if possi-
ble. It must be ensured that material deposits cannot form
on the pipe walls and no bubble formation occurs in the
product. In case of horizontal installation, please observe
the correct orientation of the HF connections, see Figure 4-
2.

There should be a straight pipe section of at least 300 mm
and equal nominal width before and after the FlowCell to en-
sure a fairly homogeneous flow profile and to rule out possi-
bly occurring microwave reflections in the pipeline. Also, not
fittings must be installed in these pipe sections.

No gas inclusions should be present in the product. If gas
bubbles cannot be ruled out, a pressure of at least 4 bar is
required in the pipeline to minimize the influence of gas
bubbles. Please observe the max. permissible operating
pressure, see
chapter 6.2 Technical Data Sensors .

The high-frequency cables should preferably be connected to
the FlowCell from below to prevent flowing water from get-
ting to the connection sockets.

The signal and reference cable should as far as possible fol-
low the same path to make sure both cables are exposed to
the same temperature and should not come into contact
with hot pipelines. We recommend installing the HF cable
through a single protection tube. If you are working with the
HF cable quad, this function is taken over in good approxi-
mation by the corrugated tube.