Installing The Sound Velocity Measuring Sensors Ddu 18; (Accessories) - Endress+Hauser PROline Prosonic Flow 93 FOUNDATION Fieldbus Operating Instructions Manual

3 Installation
32
3.3.9

Installing the sound velocity measuring sensors DDU 18

(accessories)

1. Fix a tensioning band for small or large nominal diameters as described on
Page 17. The two threaded studs must be positioned opposite each other on either
side of the pipe.
2. Push the sensor holder onto the pipe over the threaded studs and tighten the
locking nut using a spanner (AF 13).
3. Coat the contact surfaces of the sensors with an even (approx. 1 mm thick) layer of
coupling fluid (starting from the groove, through the centre and to the opposite
side), (see Page 81). Then carefully insert the sensors into the sensor holders.
Press the sensor cover onto the sensor holder until you hear a click. Make sure that
the arrows ( ▲ / ▼ "close") on the sensor housing and sensor holder are pointing to
each other. Then insert the sensor cable plugs into the openings provided and
manually tighten the plugs to the stop.
Fig. 35: Steps 1 to 3, installing the sound velocity measuring sensors
PROline Prosonic Flow 93 FOUNDATION Fieldbus
Endress+Hauser