Endress+Hauser Proservo NMS83 Operating Instructions Manual page 20

Installation
20
A
D
1
d
r
D
2
 7 Mounting with asymmetric stilling well
A Front view
B Side view
L Length from the center of the calibration window to the upper part of the stilling well
1
L Length from the center of the calibration window to the bottom of the stilling well
2
L Length from the center of the calibration window to the bottom of the flange
3
D Diameter of upper part of stilling well
1
D Diameter of stilling well
2
d Diameter of displacer
p Longitudinal wire position from the center of the flange
(Lx)
r Radial direction offset
• L : length from center of the calibration window to the bottom of the flange (
3
77 mm (3.03 in) + flange thickness).
For JIS 10K 150A RF, the flange thickness is 22 mm (0.87 in).
• When using an asymmetric stilling well, take into account the lateral shift of the
displacer and follow the NMS8x mounting direction as shown in the figure.
To calculate the required stilling well diameters, the formula below should be used.
The following tables contain the necessary parameters in order to calculate the
dimensions of the stilling well. Be sure to have appropriate dimensions of the stilling
well according to each dimension in the table.
The radial direction offset is required for only the 47 m (156.67 ft) wire drum. For all
other drums, the offset is 0 mm/in.
Proservo NMS83
B
D
1
d
p (L ) x
D
2
Endress+Hauser
A0026909