Endress+Hauser Proservo NMS83 Operating Instructions Manual page 26

Installation
26
5.1.5 Alignment of NMS8x
Flange
Confirm that the size of the nozzle and the flange is matched prior to mounting NMS8x on
the tank. The flange size and the rating of NMS8x vary depending on the customer's
specifications.
• Check the flange size of NMS8x.
• Mount the flange on the top of the tank. The deviation of the flange from the
horizontal plane should not exceed +/- 1 degree.
• When mounting NMS8x on a long nozzle, make sure that the displacer does not
touch the inner wall of the nozzle.
1
 11 Allowable inclination of mounting flange
1 Nozzle
When NMS8x is installed without a guide system, follow the recommendations below:
• Confirm the mounting nozzle is in the sector between 45 and 90 degrees (or -45
and -90 degrees)away from the inlet pipe of the tank. This prevents heavy swinging
of the displacer caused by waves or turbulence from the inlet liquid.
• Confirm the mounting nozzle is 500 mm (19.69 in) or more away from the tank
wall.
• Confirm the minimum measuring level is at 500 mm (19.69 in) or more above the
top of the inlet pipe by setting the low stop (for details of low stop setting,
→  83). This protects the displacer from direct flow of the inlet liquid.
• If a stilling well cannot be mounted in the tank due to the shape or condition of the
tank, attaching a guide system is recommended. Consult E+H services for further
information.
Proservo NMS83
A0026889
Endress+Hauser