Endress+Hauser Proservo NMS81 Technical Information

Proservo NMS81
Endress+Hauser 35
D
1
Dimension
(Example)
D
1x
Dimension
Description Formula
Example Parameter
50.9 mm
(2.00 in)
D
1c
D
1
dimension when the
displacer is at the bottom of the
stilling well
= 2 x ( |p (L
2
)|+ s)
D
1d
D
1
dimension when the radial
direction offset is considered.
This calculation is used only
with the 47 m (154.20 ft) wire
drum (G1 in Feature110) and
55 m (180.45 ft) (H1 in feature
110)
= 2 x (d/2 + r + s)
Example: L
1
= 1 000 mm, L
2
= 20 000 mm, d = 50 mm, s = 5.0, 28 m drum
Lower diameter of stilling well
The dimension of D
2
has to be the larger value of the dimensions D
1
and D
2b
.
See the table below.
Concentric pipe
D
2
Dimension
(Example)
D
2x
Dimension
Description Formula
Example Parameter
>100.9 mm
(3.97 in)
68.1 mm
(2.68 in)
D
1
Calculated D
1
value
100.9 mm
(3.97 in)
D
2b
D
2
dimension when the displacer is
in L
2
length
= 2 x (|p (L
2
)| + d/2 + s)
Example: L
2
= 20 000 mm, d = 50 mm, s = 5.0, 28 m drum
Asymmetric pipe
D
2
Dimension
(Example)
D
2x
Dimension
Description Formula
Example Parameter
>84.5 mm
(3.33 in)
68.1 mm
(2.68 in)
D
1
Calculated D
1
value
84.5 mm
(3.33 in)
D
2b
D
2
dimension that the displacer can
pass through (nth groove)
= |p (L
2
)| + d/2 + s + D
1
/2
Example: L
2
= 20 000 mm, d = 50 mm, s = 5.0, 28 m drum
Recommendations for NMS8x mounting with a stilling well
Follow the recommendations for mounting NMS8x with a stilling well.
• Keep the pipe connection welds smooth.
• When drilling holes into the pipe, keep the interior surface of the holes clear of metal chips
and burrs.
• Coat or paint the interior surface of the pipe to prevent corrosion.
• Keep the pipe as vertical as possible. Check using a plumb bob.
• Install the asymmetric pipe under the valve and align the centers of the NMS8x and the
valve.
• Set the center of the lower part of the asymmetric pipe in the direction of the lateral motion.
• Observe the recommendations as per API MPMS chapter 3.1B.
• Confirm grounding between NMS8x and the tank nozzle.

Endress+Hauser Proservo NMS81 Specifications

General

Brand	Endress+Hauser
Model	Proservo NMS81
Category	Measuring Instruments
Language	English