TI01248G/00/EN/07.23-00
71629836
2023-10-25

Products

Solutions

ServicesTechnical Information
Proservo NMS80
Tank Gauging

Application
Proservo NMS8x Series intelligent tank gauges are designed for high accuracy liquid
level measurement in storage and process applications. They fulfill the exacting
demands of tank inventory management, inventory control, custody transfer, loss
control, total cost saving, and safe operation.
Typical areas of application• Precise level, interface, and density measurement of oil (fuels), petrochemical,
chemical, and alcohol• Tank mounted intelligence makes NMS8x ideal for single or multi-task
installation, covering a wide range of measurement functions including Liquid
level, Interface level, Spot density, Density profile, Tank bottom, and Water dip andintegrating a wide range of tank sensor measurement functions including Water
level, Temperature, and Pressure.
Your benefits• SIL2/3 certified as per IEC 61508 (Min, Max, Continuous level)• SIL2 by single channel, SIL3 by dual channel (homogeneous or diverse redundancy)• Measures liquid level to an accuracy of +/- 0.4 mm (0.016 in)• Measurement of up to 2 interface levels and density of up to 3 liquid phases• Liquid density profiling of up to 50 points throughout the tank or upper layer,
configurable• Wetted parts are completely separated from the electronic circuit• Tank top mounting with 3” flange• Wide range of output signals including V1, Modbus RS 485, and HART protocol• Material and pressure rating of the wetted parts can be selected• Suitable for atmospheric and high pressure applications up to 6 bar/600 kPa/
87 psi• Integration of e.g. temperature, water level, pressure, overfill prevention sensor• Direct connection of spot or average temperature sensor• Robust IP66/68, NEMA Type 4X/6P enclosure, stainless steel or aluminum• Operation and display in a wide variety of local languages• Easy commissioning, maintenance, and diagnostics via FieldCare

Proservo NMS80

Table of contents

Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Document information . . . . . . . . . . . . . . . . . . . . . . . 3

Viscosity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Maximum displacer movement speed . . . . . . . . . . . . . . . 43

Function and system design . . . . . . . . . . . . . . . . . . . 5

Custody transfer approval . . . . . . . . . . . . . . . . . . .

44

Mechanical construction . . . . . . . . . . . . . . . . . . . .

45

Measuring principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Integration of tank sensors . . . . . . . . . . . . . . . . . . . . . . . 6
Measuring system . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Input/output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Level measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
HART Ex ia/IS active input . . . . . . . . . . . . . . . . . . . . . . 17
I/O modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

27

Terminal assignment . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Sources for gauge commands . . . . . . . . . . . . . . . . . . . . . 28
Cable entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Cable specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Overvoltage protection . . . . . . . . . . . . . . . . . . . . . . . . . 31
Overvoltage category . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Pollution degree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Performance characteristics . . . . . . . . . . . . . . . . . . 32

Reference operating conditions . . . . . . . . . . . . . . . . . . . 32
Measured value resolution . . . . . . . . . . . . . . . . . . . . . . 32
Maximum measured error . . . . . . . . . . . . . . . . . . . . . . . 32
Hysteresis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Repeatability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Linearity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Long-term drift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Influence of ambient temperature . . . . . . . . . . . . . . . . . 33
Influence of medium temperature . . . . . . . . . . . . . . . . . . 33
Influence of medium pressure . . . . . . . . . . . . . . . . . . . . 33
Effect of gas phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Ambient temperature range . . . . . . . . . . . . . . . . . . . . .
Classification of environmental conditions according to
DIN EN 60721-3-4 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature . . . . . . . . . . . . . . . . . . . . . . . . . .
Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Degree of protection . . . . . . . . . . . . . . . . . . . . . . . . . .
Shock resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vibration resistance . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electromagnetic compatibility (EMC) . . . . . . . . . . . . . . .
Maximum use altitude . . . . . . . . . . . . . . . . . . . . . . . . .

41

41
41
41
41
41
41
41
41

Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Process temperature range . . . . . . . . . . . . . . . . . . . . . .
Process pressure range . . . . . . . . . . . . . . . . . . . . . . . . .
Medium density . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Medium density difference for interface measurement . . . .

2

42
42
43
43

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts according to NACE standard . . . . . . . . . . . . . . . . .

45
46
46
47

Operability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Operating concept . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating options . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Local operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote operation . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation via service interface . . . . . . . . . . . . . . . . . . . .

48
48
48
49
50

Certificates and approvals . . . . . . . . . . . . . . . . . . .

51

CE mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
RCM marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Ex approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Single seal according to ANSI/ISA 12.27.01 . . . . . . . . . . . 51
Functional Safety (SIL) . . . . . . . . . . . . . . . . . . . . . . . . . 51
WHG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Weight & Measure approval . . . . . . . . . . . . . . . . . . . . . 51
CRN approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Test, certificate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Other standards and guidelines . . . . . . . . . . . . . . . . . . . 52
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Ordering information . . . . . . . . . . . . . . . . . . . . . . . 54

Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Calibration certificate . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Shipping condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Application packages . . . . . . . . . . . . . . . . . . . . . . . 56
Advanced tank measurement methods . . . . . . . . . . . . . .

56

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Device-specific accessories . . . . . . . . . . . . . . . . . . . . . .
Communication-specific accessories . . . . . . . . . . . . . . . .
Service-specific accessories . . . . . . . . . . . . . . . . . . . . . .
System components . . . . . . . . . . . . . . . . . . . . . . . . . . .

61
66
66
66

Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Technical Information (TI) . . . . . . . . . . . . . . . . . . . . . . 67
Brief Operating Instructions (KA) . . . . . . . . . . . . . . . . . . 67
Operating Instructions (BA) . . . . . . . . . . . . . . . . . . . . . 67
Description of Device Parameters (GP) . . . . . . . . . . . . . . . 67
Safety Instructions (XA) . . . . . . . . . . . . . . . . . . . . . . . . 67
Installation instructions (EA) . . . . . . . . . . . . . . . . . . . . . 67

Registered trademarks . . . . . . . . . . . . . . . . . . . . . . 67

Endress+Hauser

Proservo NMS80

Document information
Symbols

Safety symbols
DANGER

This symbol alerts you to a dangerous situation. Failure to avoid this situation will result in serious or
fatal injury.
WARNING

This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in serious or
fatal injury.
CAUTION

This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in minor or
medium injury.
NOTICE

This symbol contains information on procedures and other facts which do not result in personal
injury.
Electrical symbols
Alternating current
Direct current and alternating current
Direct current
Ground connection
A grounded terminal which, as far as the operator is concerned, is grounded via a grounding system.
Protective earth (PE)Ground terminals that must be connected to ground prior to establishing any other connections.
The ground terminals are located on the interior and exterior of the device:• Interior ground terminal: protective earth is connected to the mains supply.
• Exterior ground terminal: device is connected to the plant grounding system.
Tool symbols
Phillips head screwdriver
Flat blade screwdriver
Torx screwdriver
Allen key
Open-ended wrench
Symbols for certain types of information and graphics
Permitted
Procedures, processes or actions that are permitted
Preferred
Procedures, processes or actions that are preferred
Forbidden
Procedures, processes or actions that are forbidden
Tip
Indicates additional information

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Proservo NMS80

Reference to documentation
Reference to graphic
Notice or individual step to be observed
1. , 2. , 3.
Series of steps

Result of a step
Visual inspection
Operation via operating tool
Write-protected parameter
1, 2, 3, ...
Item numbers
A, B, C, ...
Views
Safety instructions
Observe the safety instructions contained in the associated Operating Instructions
Temperature resistance of the connection cablesSpecifies the minimum value of the temperature resistance of the connection cables

4

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Proservo NMS80

Function and system design
Measuring principle

NMS8x is an intelligent tank gauge for measuring liquid levels with high precision. The system isbased on the principle of gauging displacement.
A small displacer is accurately positioned in a liquid medium using a stepping motor. The displacer isthen suspended on a measuring wire which is wound onto a finely grooved wire drum. NMS8x
counts the rotations of the wire drum and to calculate the traveling distance of the wire and obtainthe liquid level change.
The drum is driven via coupling magnets that are completely separated by the drum housing. Outermagnets are connected to the wire drum, with inner magnets connected to the drive motor. As theinner magnets turn, their magnetic attraction causes the outer magnets to turn, as well, causing theentire drum assembly to turn. The change of the apparent weight of the displacer on the wire creates
torque on the outer magnets generating change of magnetic flux. These changes generated in the
drum assembly are detected by a unique electromagnetic transducer on the inner magnets. The
transducer transmits the weigh signal to a CPU using a non contact principle (patented). The drive
motor is actuated to keep the weigh signal constant at set value defined by the operating command.
When the displacer is lowered and touches a liquid, the apparent weight of the displacer is reducedby liquid buoyancy force, which is measured by a temperature-compensated magnetic transducer. As
a result, the torque in the magnetic coupling changes, and this is measured by six hall sensors. A
signal indicating the weight of the displacer is sent to the motor control circuit. As the liquid levels
rise and fall, the displacer position is adjusted by the drive motor. The rotation of the wire drum iscontinuously evaluated to determine the level value using a magnetic rotary encoder. In addition togauging the level, NMS8x can measure the interfaces between up to three liquid phases, and thetank bottom, as well as spot and profile densities.
6

5
2

4

1
4
3
7
C
B

CPU

A

8

A0026724

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1Operating principle

A
B
C
1
2
3
4
5
6
7
8

Displacer position data
Weight data
Wire drum rotation data
Encoder
Motor
Rotary transformer
ShaftsGears
Wire drum
Measuring wire
Displacer5

Proservo NMS80

Integration of tank sensors

In addition to measuring the level, interfaces, tank bottom, and density, the device can also be used
to integrate of tank sensors into tank inventory systems. All measured and calculated values can bedisplayed on the built-in display. They can be transferred to an inventory control system via a fieldcommunication protocol.
AB
4...20mA

HART
HART

HART

3

3

2

2

4

4

1

1

A0026722

2
A
B
1
2
3
4

Measuring system for NMS80/NMS81
HART multidrop mode
HART and analog mode
Pressure transmitter
Average temperature transmitter (NMT81)
Proservo NMS8x
Field protocol transmits data to an inventory control system

Typical values measured by the sensors are:• Level• Spot temperature• Average temperature• Water level• Pressure• Secondary level value (for critical applications)
Major applications
The number of measuring functions and output options, as well as the compact design, enables
NMS8x to be installed in a wide range of applications at minimal cost.
Petroleum industry
From oil production to storage at an oil depot, there exists an extensive need to measure andmanage a wide variety of products. Remote tank gauging by NMS8x combined with an inventory
management system is an ideal way to measure and manage tank contents.
Chemical industry
A wide choice of options for the wetted parts ensures chemical compatibility and long product life.
Power plant
Fuel oil levels are major applications where precise measurement is required to ensure safe
operation.

6

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Proservo NMS80

Typical tank installation
A

B

1

1
6

6

2

3

3

4

4

5

5

C

1
6

3

4
5

A0026725

3
A
B
C
1
2
3
4
5
6

Typical tank installation
Fixed roof tankHigh pressure tank
Floating roof tank with stilling well
NMS8xBall valve
Measuring wire
Displacer
Stilling well
Prothermo NMT81

When installing NMS8x to a floating roof tank, be sure to use a stilling well to protect themeasuring wire. Otherwise the wire may break due to an external shock.

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Proservo NMS80

Application
NMS8x is primarily a highly accurate level measurement gauging instrument with the added ability
to measure density. The following level measurements are supported: liquid surface level andinterface level(s) between different liquids, as well as finding tank floor or datum plate. The
following density measurements are supported: single-point (spot measurements), as well as profile
measurements of all liquid(s) in a tank.
The choice of the most suitable displacer depends on the liquid conditions and measurement
functions. These can be classified as follows:• Continuous measurement value, e.g. level, interface• One-time measurement value, e.g. spot density, tank profile, interface profile, manual profile
Measurement terminology

7
1

6
2

5
3
4

A0026727

4
1
2
3
4
5
6
7

8

NMS8x with standard level, I/F x 2, Tank bottom and spot density x 3 measurement
Upper density
Middle density
Lower density
Tank bottom
Lower I/F
Upper I/F
Level

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Proservo NMS80

A

B

C

1

2
3

4
5
6

A0026728

5
A
B
C
1
2
3
4
5
6

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Density Profile measurement
Tank profile: density profiling throughout tank
Interface profile: density profiling withing upper phase
Manual profile: density profiling from a specific position to level
Level
Manual profile level
Upper phase (oil)Middle phase (emulsion)
Lower phase (water)
Tank bottom

9

Proservo NMS80

Displacer selection guide
A wide variety of displacers are available to suit different application. Proper displacer selection
ensures optimal performance and longevity. The following guidelines will assist you in selecting themost suitable displacer for your application.
Displacer types
The following NMS8x displacers are available.

1030 mm (1.18 in)

50 mm (1.97 in)

70 mm (2.76 in)

110 mm (4.33 in)

316L/PTFE

316L/AlloyC276/PTFE

316L

316L

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Proservo NMS80

Displacer dimensions
AB

185.6 (7.31)

153.6 (6.05)

aØ30(1.18)

Ø30(1.18)

9.5 (0.37)

3.6 (0.14)

86 (3.39)

64 (2.52)

a165.5 (6.52)

121 (4.76)

9.5(0.37)

1

A0029579ABa⌀30 mm (1.18 in) 316L cylindrical displacer⌀30 mm (1.18 in) PTFE cylindrical displacer
Immersion point⌀30 mm (1.18 in) 316L
cylindrical displacer

Item⌀30 mm (1.18 in) PTFE
cylindrical displacer

Weight (g)

261

250

Volume (ml)

84.3

118

Balance volume (ml)

41.7

59

The weight, volume, and balance volume are individually determined by each displacer and also
might vary depending on the values stated above.

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Proservo NMS80

A

128.8 (5.07)

85 (3.35)a2.5 (0.09)

Ø50.8 (2)2.5 (0.09)

45 (1.77)

45 (1.77)

a128.8 (5.07)

85 (3.35)

BØ50.8 (2)11.5
(0.45)

35 (1.38)

a82.7 (3.26)

46.7 (1.84)

11.5(0.45)C

Ø50 (1.97)
A0029580

A
BCa⌀50 mm (1.97 in) 316L cylindrical displacer⌀50 mm (1.97 in) AlloyC276 cylindrical displacer⌀50 mm (1.97 in) PTFE cylindrical displacer
Immersion point⌀50 mm (1.97 in) 316L
cylindrical displacer⌀50 mm (1.97 in) AlloyC276
cylindrical displacer⌀50 mm (1.97 in) PTFE
cylindrical displacer

Weight (g)

253

253

250

Volume (ml)

143

143

118

Balance volume (ml)

70.7

70.7

59

Item

The weight, volume, and balance volume are individually determined by each displacer and also
might vary depending on the values stated above.

12

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Proservo NMS80

A

67 (2.64)

26 (1.02)
Ø110 (4.33)

2 (0.07)a

10 (0.39)

Ø70(2.76)

1 (0.03)17 (0.67)

a90.2 (3.55)

47.6 (1.87)

B

A0029582ABa⌀70 mm (2.76 in) 316L conical displacer⌀110 mm (4.33 in) 316L conical displacer
Immersion point

Item⌀70 mm (2.76 in) 316L conical displacer ⌀110 mm (4.33 in) 316L conical displacer

Weight (g)

245

223

Volume (ml)

124

108

Balance volume (ml) 52.8

36.3

The weight, volume, and balance volume are individually determined by each displacer and also
might vary depending on the values stated above.
Recommended displacer by application
Application

Product level

Interface level

Density

Viscous liquid

50 mm (1.97 in) PTFE

Not Recommended

Not Recommended

Black oil (e.g. crude oil,heavy oil)

50 mm (1.97 in) 316L
50 mm (1.97 in) PTFE

50 mm (1.97 in) 316L
50 mm (1.97 in) PTFE

50 mm (1.97 in) 316L
50 mm (1.97 in) PTFEWhite oil (e.g. gasoline,
diesel, heating oil)

50 mm (1.97 in) or
70 mm (2.76 in) 316L

50 mm (1.97 in) or
70 mm (2.76 in) 316L

50 mm (1.97 in) or
70 mm (2.76 in) 316L

Liquefied gas, LPG/LNG

50 mm (1.97 in) or
70 mm (2.76 in) 316L

50 mm (1.97 in) or
70 mm (2.76 in) 316L

50 mm (1.97 in) or
70 mm (2.76 in) 316L

Corrosive liquid

50 mm (1.97 in) AlloyC276 50 mm (1.97 in)
50 mm (1.97 in) PTFE
AlloyC276
50 mm (1.97 in) PTFE

50 mm (1.97 in)AlloyC276
50 mm (1.97 in) PTFE

Product level
In general, larger diameter displacers have better accuracy under similar conditions.
Interface level(s)Cylindrical-shaped displacers, with rounded top and bottom, reduce resistance while moving throughliquid(s). This provides smoother movement and faster interface measurements compared to flatfaced displacers, particularly in density profile measurements that span the full tank height.
In order to move a displacer down through liquids, the displacer density (weight divided byvolume) must be higher than the liquid density.

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Proservo NMS80

Tank bottom and datum plate level
70 mm (2.76 in) and 50 mm (1.97 in) displacers reduce resistance while moving through liquids.
This provides smoother movement and faster interface measurements.
Density
Since the density is the calculated result of two measurements, a displacer with higher volume willusually yield the most accurate density measurement. In most cases we recommend our
50 mm (1.97 in) diameter displacer for density measurement.
For non-viscous applications (e.g. white oil, LPG/LNG), the 70 mm (2.76 in) displacer also works
very well.
Level and density
When an application calls for equal emphasis on measuring both level and density, the
50 mm (1.97 in) and the 70 mm (2.76 in) diameter displacers will give the best all-aroundperformance.
Custody transfer
The 50 mm (1.97 in) displacer or larger is the choice for requirements per NMi.
The 110 mm (4.33 in), conical 316L displacer is the choice for requirements per PTB.
Material compatibility
Displacers are available in three different standard materials. Material compatibility should be
confirmed to ensure safe operation and optimal NMS8x performance.
316L
For NMS80 and NMS81, stainless steel is a highly versatile industrial material that provides goodcompatibility with a wide range of chemicals, including most white and black oils.
AlloyC276
This high-performance material is harder than 316L, and provides excellent resistance to many of
the harshest corrosive chemical applications.
PTFE
One of the most well-known and versatile polymer materials, this high-performance material has
one of the lowest friction coefficients. It provides excellent performance in viscous/sticky liquids, andalso has excellent chemical resistance to a wide range of corrosives.
Process connection size
The process connection defines the tank process entry, and may affect the displacer size. The
standard NMS8x process connections start at 3”/DN80 and fit most tank gauging applications.
Accordingly, most applications can be covered with one of the 50mm or 70mm displacer options.
Smaller diameter displacers are available when the process connection is smaller.
When the 110 mm (4.33 in) diameter custody transfer approval (PTB) displacer is selected, aseparate calibration and maintenance chamber is recommended between the NMS8x and tankprocess connection.
Measuring system

14• From single tank level measurement to the largest oil refinery applications, Endress+Hauser tankgauging devices are an integral part of tank farm management solutions. A wide variety of data
output protocols are available for seamless integration into many commonly used systems.
• A primary example is Tankvision from Endress+Hauser. Tankvision is a scalable system offering
local tank management for multiple loops via Modbus or V1 protocols. Accumulated data isavailable to DCS and other plant management systems via a Host Link.

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Proservo NMS80

15

11

14
12

13

NXA820

NXA82010988NXA820

NXA820

7

1

4

2

3

6

2

3

5

2

3

A0027700

6
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

Endress+Hauser

Integration of tank gauging devices into an inventory management system (typical example)
Proservo NMS8x
Pressure transmitter (e.g. Cerabar)
Temperature transmitter (e.g. Prothermo)
Tankside Monitor NRF81
Micropilot S FMR5xx
Micropilot NMR8x
Field protocol (e.g. Modbus, V1)
Tankvision Tank Scanner NXA820
Ethernet
Ethernet switch
Internet Browser
Tankvision Data Concentrator NXA821
Tankvision Host Link NXA822
ModbusDCS or PLC

15

Proservo NMS80

Input/output
Level measurement

Measured variable
Proservo is primarily a highly accurate level measurement gauging instrument, with the added
ability to measure interfaces and densities. The following level measurements are supported: liquidsurface level and interface level(s) between different liquids, as well as finding tank bottom or datum
plate. The following density measurements are supported: single-point (called “spot”
measurements), as well as profile measurements of all liquid(s) in a tank.
Measuring range• Level and interface: Max.36 m (118 ft)(longer range is possible as special product)• Density: 0.430 to 2.000 g/cm3
The level and interface measuring range depend on the measuring wire and material compatibility tomeasured medium. Measuring wires are available in three different standard materials. Material
compatibility should be confirmed to ensure safe operation and optimal measuring performance.
Measuring range

Material

16 m (52.49 ft)

PFA > 316L

22 m (73.33 ft)

AlloyC276

28 m (93.33 ft), 36 m (118 ft)

316L

For devices with custody calibration (10 points) with option ITA or ITC of ordering feature 150"Accuracy, Weight + Measure Approval": Maximum measuring range : 40 m (131 ft)
If the application exceeds the range listed above, contact Endress+Hauser for technically special
products / solutions.

16

Endress+Hauser

Proservo NMS80

HART Ex ia/IS active input

D
1
2

E
CDI

1 2 3 E4D

1 2 3 4C

1 2 3 4 5 6 7 8

1
2
1

CDI

i

F 21

1

3
4

B

1 2 3 4 5 6 7 8A

1 2 3 4

1

C

G2

HR

1 2 3 4
3

POWER

on
WP
SIM

A0027364

7E1
E2HART Ex ia/IS active input
HART +
HART -The device has a HART Ex ia/IS active input. Additional features are provided if the following
Endress+Hauser devices are connected:
Prothermo NMT
The measured level is transmitted to the Prothermo. Prothermo uses this level to calculate theaverage temperature of the product.
Technical data
• Transmitter power supply voltage
23.0 V - 380 Ω ⋅ Iload• Maximum load
500 Ω including signal line
• Maximum current of all connected devices
24 mA
The HART Ex ia/IS active input is available by default. It needs not to be chosen explicitly whenordering a device.

Endress+Hauser

17

Proservo NMS80

I/O modules

Overview

D

1 2 3 4C

1 2 3 4 5 6 7 8B

1 2 3 4 5 6 7 8A

1 2 3 4D

1 2 3 4C

1 2 3 4 5 6 7 8B

1 2 3 4 5 6 7 8A

1 2 3 4

1
2

E

1
2

E
1

CDI

3
4

1

CDI

i

F 12
1

G2

HR
on

3

WP
SIM

POWER

i

F 12
G12

3
4

HR
on
POWER

WP
SIM

A0027363

8

Position of the I/O modules in the terminal compartment

The terminal compartment contains up to four I/O modules, depending on the order code.
• Modules with four terminals can be in any of these slots.
• Modules with eight terminals can be in slot B or C.
The exact assignment of the modules to the slots is dependent on the device version. For adetailed description refer to the Operating Instructions of the device in question.
The following restrictions apply when selecting the modules:• The device may contain a maximum of four I/O modules.
• A maximum of two I/O modules with 8 terminals is possible.
Ordering feature 040: "Primary Output"
NMx8x - xxxx XX xx xx ...
040

O 1)

N 2)

T 3)

S 4)

1

4

→  214→  228→  24

Modbus RS485 5)
A1
V1

5)

B1

1

4-20mA HART Ex d/XP

5)

E1

1

4-20mA HART Ex i/IS

5)

H1

1

8

→  241

4→  23

WM550

5)

C1
1)
2)
3)
4)
5)

OptionNumber of I/O modules
Number of terminals
Technical data
Type of I/O module

Ordering feature 050: "Secondary I/O Analogue"
NMx8x - xxxx xx XX xx ...
050

18

Endress+Hauser

Proservo NMS80

Ordering feature 050: "Secondary I/O Analogue"• Type of I/O module:
1 x "Ex d/XP 4-20mA HART + RTD input"• Option
A1• Number of I/O modules
1• Number of terminals
1x8• Technical data →  24
• Type of I/O module:
2 x "Ex d/XP 4-20mA HART + RTD input"• Option
A2• Number of I/O modules
2• Number of terminals
2x8• Technical data →  24
• Type of I/O module:
1 x "Ex i/IS 4-20mA HART+ RTD input"• Option
B1• Number of I/O modules
1• Number of terminals
1x8• Technical data →  24
• Type of I/O module:
2 x "Ex i/IS 4-20mA HART+ RTD input"• Option
B2• Number of I/O modules
2• Number of terminals
2x8• Technical data →  24
• Type of I/O module:
1 x "Ex i/IS 4-20mA HART + RTD input"
1 x "Ex d/XP 4-20mA HART + RTD input"• Option
C2• Number of I/O modules
2• Number of terminals
2x8• Technical data →  24
• Type of I/O module:none• Option
X0• Number of I/O modules
0• Number of terminals
0• Technical data Ordering feature 060: "Secondary I/O Digital Ex d/XP"
NMx8x - xxxx xx xx XX ...
060

Endress+Hauser

19

Proservo NMS80

Ordering feature 060: "Secondary I/O Digital Ex d/XP"• Type of I/O module:
1 x "2x relay + 2x discrete I/O"
• Option
A1• Number of I/O modules
1• Number of terminals
1x4• Technical data →  26
• Type of I/O module:
2 x "2x relay + 2x discrete I/O"
• Option
A2• Number of I/O modules
2• Number of terminals
2x4• Technical data →  26
• Type of I/O module:
3 x "2x relay + 2x discrete I/O"
• Option
A3• Number of I/O modules
3• Number of terminals
3x4• Technical data →  26
• Type of I/O module:
1x "Modbus RS485"• Option
B1• Number of I/O modules
1• Number of terminals
3x4• Technical data →  21
• Type of I/O module:
1x "Modbus RS485"
1 x "2x relay + 2x discrete I/O"
• Option
B2• Number of I/O modules
2• Number of terminals
2x4• Technical data
→  21→  26• Type of I/O module:
1x "Modbus RS485"
2 x "2x relay + 2x discrete I/O"
• Option
B3• Number of I/O modules
3• Number of terminals
3x4• Technical data
→  21→  2620

Endress+Hauser

Proservo NMS80• Type of I/O module:
1 x "WM550"• Option
E1• Number of I/O modules
1• Number of terminals
1x4• Technical data →  23
• Type of I/O module:
1 x "WM550"
1 x "2x relay + 2x discrete I/O"
• Option
E2• Number of I/O modules
2• Number of terminals
2x4• Technical data →  23
• Type of I/O module:
1 x "WM550"
2 x "2x relay + 2x discrete I/O"
• Option
E3• Number of I/O modules
3• Number of terminals
3x4• Technical data →  23
• Type of I/O module:none• Option
X0• Number of I/O modules
0• Number of terminals
0• Technical data "Modbus RS485": Technical data
Number of units
Maximum 15 instruments per loop
Baud rate: Selectable• 600 bit/s• 1 200 bit/s• 2 400 bit/s• 4 800 bit/s• 9 600 bit/s• 19 200 bit/s
Parity: Selectable• Odd• Even• NoneCable
3-wire, with screening

Endress+Hauser

21

Proservo NMS80

The screening must be connected inside the housing
Termination resistors
To be set as required in specific environments
Topology
Serial bus
Transmission distance
Maximum 1 200 m (3 900 ft)
Instrument address
Each transmitter has an individual bus address configured in the software of the transmitter
Isolation
Bus inputs are electrically isolated from the other electronics
Error on alarm
Error message classified according to NAMUR NE 107"V1": Technical data
Number of units
Maximum 10 instruments per loop
Baud rate: Selectable
3 300 bit/s
Cable• 2-wire twisted pair, screening recommended• 2-wire, unscreened
Termination resistors
Not required
Topology• Serial bus• Tree structure
Transmission distance
Maximum 6 000 m (19 700 ft)
Instrument address
Each transmitter has an individual bus address configured in the software of the transmitter
Isolation
Serial communication circuit isolated from other circuits
Error on alarm
Error message classified according to NAMUR NE 107

22

Endress+Hauser

Proservo NMS80

WM550: Technical data
Number of units
Maximum 15 1) instruments per loop
Baud rate: Selectable• 600 bit/s• 1 200 bit/s• 2 400 bit/s• 4 800 bit/s
Cable• 2-wire twisted pair, unscreened (recommended)• 2-wire, screened or unscreened
Topology
Current loop or 2 redundant current loops (requires 2 I/O modules WM550)
Transmission distance
Maximum 7 000 m (22 967 ft)
Instrument address
Each transmitter has an individual bus address configured in the software of the transmitter
Isolation
Serial communication circuit isolated from other circuits
Error on alarm
Error message classified according to NAMUR NE 107

1)

The maximum number of devices depends on the maximum output voltage of the master and the voltage drop of slaves. For NXA820 with Nxx8x
devices, a maximum number of 12 devices is guaranteed

Endress+Hauser

23

Proservo NMS80"4-20mA HART" I/O module (Ex d/XP or Ex i/IS): Technical data
General data
Number of units
Maximum 6 instruments per loop
Baud rate: Selectable
1 200 bit/s
Cable• 2-wire twisted pair, screened• Core cross section: 0.2 to 2.5 mm2 (24 to 13 AWG)
Topology• Serial bus• Tree structure
Transmission distance
Maximum 1 200 m (3 900 ft)
Instrument address
Each transmitter on a signal loop has an individual bus address. This is defined within thetransmitter software and / or auxiliary configuration environment such as host system or Field
Communicator 475.
Isolation
Bus inputs are electrically isolated from the other electronics
Input data
Input operating modes• 4..20mA input (1 external device)• HART master+4..20mA input (1 external device)• HART master (up to 6 external devices)
Internal load (to ground)400 Ω
Measuring range
0 to 26 mA
Accuracy±15 µA (after linearization and calibration)
Connection of a Prothermo NMT
The measured level is transmitted to the Prothermo. Prothermo uses this level to calculate theaverage temperature of the product.
Connection of a RTD temperature probe
2-, 3- or 4-wire connection
Output data
Output operating modes• 4..20mA output• HART slave +4..20mA output
Output current
3 to 24 mA
Accuracy±15 µA (after linearization and calibration)
Error on alarm
HART error message classified according to NAMUR NE 107
Data for passive usage (input or output)• Minimum terminal voltage
10.4 V 2)• Maximum terminal voltage
29 V 2)2)

24

Observing these values is mandatory in order to ensure correct measured value information.

Endress+Hauser

Proservo NMS80

E
D

1 2 3 4C

1 2 3 4 5 6 7 8

2
1

CDI
1
2

E
1

CDI

i

F 12

3
4

C

1 2 3 4 5 6 7 8B

1 2 3 4 5 6 7 8iB

1 2 3 4 5 6 7 8A

1 2 3 4

1

G2

F 12

HR
on

3

WP
SIM

POWER

3
4

1

G2
G

HR
on

3

+

!
A0033030

9

Passive input or output: Use terminals 1 and 2

Data for active usage (input or output)• Transmitter power supply voltage(Ex d/XP)
18.5 V - 360 Ω ⋅ Iload• Transmitter power supply voltage(Ex i/IS)
20.0 V - 360 Ω ⋅ Iload• Output loadmax. 500 Ω including signal line 3)

E
CDI
D

1 2 3 4C

1 2 3 4 5 6 7 8

2
1

1
2

E
1

CDI

i

F 12

3
4

C

1 2 3 4 5 6 7 8B

1 2 3 4 5 6 7 8iB

1 2 3 4 5 6 7 8A

1 2 3 4

1

G2

F 12

HR
on

3
POWER

WP
SIM

3
4

1

G2
G
3

HR
on

-

+

A0033031

 10

3)

Active input or output: Use terminals 2 and 3

Observing this value is mandatory in order to ensure correct measured value information.

Endress+Hauser

25

Proservo NMS80"Digital I/O module": Technical data
Output• Relay switching power for resistive load
• 30 VDC @ 2 A• 250 VDC @ 0.1 A• 250 VAC @ 2 A• Relay type• normally open;• can be set to "normally closed" by a software option 4)
Input• Maximum pick-up voltage• 250 VAC
• 250 VDC
• Minimum pick-up voltage• 25 VAC• 5 VDC• Current consumption at maximum voltage• ≤ 1 mA (DC)• ≤ 2 mA (AC)4)

26

In case of a power supply failure, the switching state is always "open", irrespective of the selected software option.

Endress+Hauser

Proservo NMS80

Power supply
Terminal assignment
1 2 3 4EC

1 2 3 4 5 6 7 8B

1 2 3 4 5 6 7 8A

1 2 3 4

i

F 21

3
4

HR
on

3
POWER

WP
SIM

C

1 2 3 4 5 6 7 8B

1 2 3 4 5 6 7 8A

1 2 3 4i

1

G2

1 2 3 4

1

CDI

1

CDI

D
1
2

E
D
1
2

F 12

G

1
2

3
4

HR
on

3
POWER

WP
SIM
G1 N AC 85...264 V
G3 L

A0026905

 11

Terminal compartment (typical example) and ground terminals

Housing thread
The threads of the electronics and connection compartment can be coated with an anti-friction
coating.
The following applies for all housing materials:
Do not lubricate the housing threads.
Terminal area A/B/C/D (slots for I/O modules)
Module: Up to four I/O modules, depending on the order code
• Modules with four terminals can be in any of these slots.
• Modules with eight terminals can be in slot B or C.
The exact assignment of the modules to the slots is dependent on the device version. For adetailed description refer to the Operating Instructions of the device in question.
Terminal area E
Module: HART Ex i/IS interface• E1: H+• E2: HTerminal area F
Remote display• F1: VCC (connect to terminal 81 of the remote display)• F2: Signal B (connect to terminal 84 of the remote display)• F3: Signal A (connect to terminal 83 of the remote display)• F4: Gnd (connect to terminal 82 of the remote display)
Terminal area G (for High voltage AC power supply and Low voltage AC power supply)• G1: N
• G2: not connected• G3: L
Terminal area G (for Low voltage DC power supply)• G1: L• G2: not connected• G3: L+
Terminal area: Protective ground
Module: Protective ground connection (M4 screw)

A0018339 12

Endress+Hauser

Terminal area: Protective ground27

Proservo NMS80

Gnd

Vcc

Remote display and operating module DKX001

A

B

81 82 83 84

F 12

1

3
4

2
F1 F2 F3 F4D

1 2 3 4

1
2

E
1

CDI

C

1 2 3 4 5 6 7 8

i

F 21

B

1 2 3 4 5 6 7 8A

1 2 3 4

1

G2

HR
on

B

A

Gnd

3

Vcc

3

3
4

POWER

WP
SIM

A0037025

 13
1
2
3

Connection of the remote display and operating module DKX001 to the Tank Gauging device (NMR8x,
NMS8x or NRF8x)

Remote display and operating module
Connecting cable
Tank Gauging device (NMR8x, NMS8x or NRF8x)

The remote display and operating module DKX001 is available as an accessory. For details refer
to SD01763D.
• The measured value is indicated on the DKX001 and on the local display and operating
module simultaneously.
• The operating menu cannot be accessed on both modules at the same time. If the operating
menu is entered in one of these modules, the other module is automatically locked. This
locking remains active until the menu is closed in the first module (back to measured value
display).
Supply voltage

High voltage AC power supply:
Operational value:
100 to 240 VAC (- 15 % + 10 %) = 85 to 264 VAC , 50/60 Hz
Low voltage AC power supply:
Operational value:
65 VAC (- 20 % + 15 %) = 52 to 75 VAC , 50/60 Hz
Low voltage DC power supply:
Operational value:
24 to 55 VDC (- 20 % + 15 %) = 19 to 64 VDC

Power consumption

Maximum power varies depending on the configuration of the modules. The value shows maximum
apparent power, select the applicable cables accordingly. The actual consumed effective power is
12 W.
High voltage AC power supply:
28.8 VA
Low voltage AC power supply:
21.6 VA
Low voltage DC power supply:
13.4 W

Sources for gauge commands

Gauge commands can be sent via various sources.
• Displays or CDI (e.g. FieldCare)• Digital input (e.g. switch)• Fieldbus (Modbus, V1, HART)
The last received gauge command via any sources will be executed as usual.
During calibration, gauge commands are not accepted from any sources.

28

Endress+Hauser

Proservo NMS80

1

XX

XX

XX

XX

X

mm

2

3
NXA820

INST
STOP
OFF

LIFT

A0029538

1
2
3

Display operation
Digital input (e.g. switch)
Tankvision

Gauge command priorities
The priority of the gauge command for NMS8x is very simple. The last received gauge command via
any sources will be executed to take of the former gauge command. However the priority varies
depending on the devices. When replacing the device with the NMS8x, check the priorities shown
below.
NOTICE
Undesired gauge command will be executed.
If the setting is not changed, an undesired gauge command will be executed (e.g. Level command via
Fieldbus would overwrite Stop command for maintenance.).
‣ If the system has been automatically or semi-automatically programmed for operation,
maintenance or other purposes, the setting should be changed corresponding to use.
Proservo NMS8x
By display

Endress+Hauser

From digital input

From Fieldbus

CommandPriority

CommandPriority

CommandPriority

Level

1

Level

1

Level

1

Interface

1

Interface

1

Interface

1

Tank bottom

1

Tank bottom

1

Tank bottom

1

Spot density

1

Spot density

1

Spot density

1

Profile density

1

Profile density

1

Profile density

1

Up

1

Up

1

Up

1

Stop

1

Stop

1

Stop

1

29

Proservo NMS80

Proservo NMS5/NMS7
By display

From NRF560

From digital input

From Fieldbus

CommandPriority

CommandPriority

CommandPriority

CommandPriority

Level

4

Level

4

Level

4

Level

4

Interface

2

Interface

3

Interface

1

Interface

4

Tank bottom

2

Tank bottom

3

N/A

N/A

Tank bottom

4

Spot density

2

Spot density

3

N/A

N/A

Spot density

4

Profile density

2

Profile density

3

N/A

N/A

Profile density

4

Up

2

Up

3

Up

1

Up

4

Stop

2

Stop

3

Stop

1

Stop

4

Servo level gauge TGM5
By display

From NRF560

From DRM9700

From digital input From Fieldbus

CommandPriority Command

Priority Command Priority Command Priority Command

Priority

Level

4

Level

4

Level

4

Level

4

Level

4

Interface

2

Interface

3

N/A

N/A

N/A

N/A

Interface4

Tankbottom2

Tankbottom

3

N/A

N/A

N/A

N/A

Tank
bottom4

Spot density 2

Spot density 3

N/A

N/A

N/A

N/A

Spot density 4

Profiledensity

2

Profiledensity

3

N/A

N/A

N/A

N/A

Profiledensity

4

Up

2

Up

3

Up

1

Up

1

Up

4

Stop

2

Stop

3

N/A

N/A

Stop

1

Stop

4

Servo level gauge TGM4000
By display

30

From DRM9700

From digital input

From Fieldbus

CommandPriority

CommandPriority

CommandPriority

CommandPriority

Level

4

Level

4

Level

4

Level

4

Interface

2

Interface

1

N/A

N/A

Interface

4

Tank bottom

2

N/A

N/A

N/A

N/A

Tank bottom

4

Spot density

2

N/A

N/A

N/A

N/A

Spot density

4

Profile density

2

N/A

N/A

N/A

N/A

Profile density

4

Up

2

Up

1

Up

1

Up

4

Stop

2

Stop

N/A

Stop

1

Stop

4

Endress+Hauser

Proservo NMS80

Cable entries

Ordering feature 090 "Electrical Connection" 1)

Cable entries (with blind plugs) 2)A

7 x thread M20

B

7 x thread M25

C

7 x thread G1/2

D

7 x thread G3/4

E

7 x thread NPT1/2

F

7 x thread NPT3/4

1)
2)

Position 090 of the order code, e.g. NMx8x-xxxxxxxxxxxxxA...
The entries NOT having I/O modules inside will be directly assembled with 316L blind plugs without
adapters. For details of module positions, refer to the chapter for "Slots for I/O modules" in Operating
Instructions.

For the following devices with JPN Ex approval, cable glands are attached to the device (seeposition 010 of the order code). These cable glands must be used.
Proservo NMS80-JC...
Cable specification

Terminals
Wire cross section 0.2 to 2.5 mm2 (24 to 13 AWG)
Use for terminals with function: Signal and power supply• Spring terminals (NMx8x-xx1...)• Screw terminals (NMx8x-xx2...)
Wire cross section max. 2.5 mm2 (13 AWG)
Use for terminals with function: Ground terminal in the terminal compartment
Wire cross section max. 4 mm2 (11 AWG)
Use for terminals with function: Ground terminal at the housing
Power supply line
Standard device cable is sufficient for the power line.
HART communication line
• Standard device cable is sufficient if only the analog signal is used.
• Shielded cable is recommended if using the HART protocol. Observe the grounding concept of theplant.
Modbus communication line
• Observe the cable conditions from the TIA-485-A, Telecommunications Industry Association.
• Additional conditions: Use shielded cable.
V1 communication line
• 2-wire twisted pair, screened or unscreened cable• Resistance in one cable: ≤ 120 Ω• Capacitance between lines: ≤ 0.3 µF
WM550 communication line
• 2-wire twisted pair, unscreened cable• Cross section minimum 0.5 mm2 (20 AWG)
• Maximum total cable resistance: ≤ 250 Ω• Cable with low capacitance

Overvoltage protection

On the communication and power lines; according to IEC 60060-1 /DIN 60079-14:
10 kA, 8/20 μs, 10 pulses according to IEC 60060-1 / DIN 60079-14

Overvoltage category

Overvoltage category II

Pollution degree

Pollution degree 2

Endress+Hauser

31

Proservo NMS80

Performance characteristics
Reference operating
conditions

According to OIML R85

Measured value resolution

Level and interface≤ 0.1 mm (0.004 in)

Density≤ 0.001 g/cm3

Maximum measured error

Level±0.4 mm (±0.016 in)Reference condition
Accuracy of NMi approved calibration rig at Endress+Hauser Yamanashi according to the combination of
the order code is as per the table below.

Interface±2 mm (±0.08 in)Reference condition• Standard displacer 70 mm (2.76 in)• Density difference 0.2 g/cm3 or more (min.
detectable density difference for interface
measurement is 0.1 g/cm3• Max. performance selected in feat.150

Tank bottom±2 mm (±0.08 in)Reference condition• Standard displacer 70 mm (2.76 in)• Flat datum plate or flat tank bottom• Max. performance selected in feat.150

Density±0.003 g/cm3

Reference condition• Standard displacer 50 mm (1.97 in) or
70 mm (2.76 in)• Density calibration (offset)• Max. performance selected in feat.150

The following values are valid for a level measurement distance up to 40 m (133.33 ft).
Displacer (ordering feature 120)
Orderingfeature 150

Weight and measureapproval

1AA, 2AA

1AC, 2AC,
3AC, 4AC, 5AC

1BE, 4AE

1BJ⌀30 mm(1.18 in)

⌀50 mm(1.97 in)⌀70 mm(2.76 in)⌀110 mm(4.33 in)Accuracy
ICR

Standard version, w/ocalibration certificate±2.5 mm(±0.1 in)

±1 mm(±0.04 in)±1 mm(±0.04 in)±1 mm(±0.04 in)

ICW

Standard version, 3-pointcalibration certificate±2.5 mm(±0.1 in)

±1 mm(±0.04 in)±1 mm(±0.04 in)±1 mm(±0.04 in)

ICX

Standard version, 5-pointcalibration certificate±2.5 mm(±0.1 in)

±1 mm(±0.04 in)±1 mm(±0.04 in)±1 mm(±0.04 in)

ITA

Maximum performance, 10point calibration certificate

N/A±0.6 mm(±0.024 in)±0.4 mm(±0.016 in)±0.4 mm(±0.016 in)

ITC

Standard version, 10-pointcalibration certificate

N/A

±1 mm
(±0.04 in)±1 mm(±0.04 in)±1 mm(±0.04 in)

LTA

Maximum Performance, LNE
type approval acc. to OIML
R85, API 3.1B, ISO4266,
factory calib. certificate

N/A±0.6 mm(±0.024 in)±0.4 mm(±0.016 in)±0.4 mm(±0.016 in)Custody transfer, LNE typeapproval acc. to OIML R85,
API 3.1B, ISO4266, factory
calib. certificate

N/A

±1 mm
(±0.04 in)±1 mm(±0.04 in)±1 mm(±0.04 in)

LTC

32

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Proservo NMS80

Displacer (ordering feature 120)
Orderingfeature 150

Weight and measureapproval

1AA, 2AA

1AC, 2AC,
3AC, 4AC, 5AC

1BE, 4AE

1BJ⌀30 mm(1.18 in)

⌀50 mm(1.97 in)⌀70 mm(2.76 in)⌀110 mm(4.33 in)Accuracy
NTA

NTC

PTA

PTC

Hysteresis

Maximum performance, NMi
type approval acc. OIML R85,
API 3.1B, ISO 4266, factory
calibration certificate

N/A±0.6 mm(±0.024 in)±0.4 mm(±0.016 in)±0.4 mm(±0.016 in)Custody transfer typeapproval acc. NMi OIML
R85, API 3.1B, ISO4266,
factory calibration certificate

N/A

±1 mm
(±0.04 in)±1 mm(±0.04 in)±1 mm(±0.04 in)

Maximum performance, PTB
type approval factory
calibration certificate

N/A

N/A

±0.4 mm(±0.016 in)±0.4 mm(±0.016 in)Custody transfer typeapproval per PTB, factory
calibration certificate

N/A

N/A

±1 mm
(±0.04 in)±1 mm(±0.04 in)Within the specified accuracy (+/- 1 mm (0.039 in)) according to OIML R85 (2008)
It can be reduced by non hysteresis measurement mode.

Repeatability

0.1 mm (0.004 in)

Linearity

Within maximum measured error

Long-term drift

Within the specified error of measurement

Influence of ambient
temperatureWithin the specified accuracy according to OIML R85 (2008)

Influence of medium
temperature

None (Displacer principle is not influenced by medium temperature.)

Influence of medium
pressure

No influence of medium pressure to the measuring principle.

Effect of gas phase

No effect of gas phase to the measuring principle.

Endress+Hauser

33

Proservo NMS80

Installation
Requirements

Type of tanks
Depending on the type of tank and application, different installation procedures are recommended
for NMS8x.
Type of tanks

Without guide system

With stilling wellWith guide wires

Fixed roof tank

Floating roof tank

Covered floating roof tankPressurized or bullet tank

Tank with agitator or heavy
turbulence• A stilling well is required in a floating roof tank and a covered floating roof tank.
• Guide wires cannot be installed in a floating roof tank. When the measuring wire is exposed
to free space, it may break due to an external shock.
• Installing guide wires is not allowed in pressurized tanks because the wires would prevent
closing the valve for replacing the wire, wire drum, or displacer. NMS8x installation position
is important for applications without the guide wire system in order to prevent the measuring
wire from being broken (refer to Operating Instructions for details ).

34

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Proservo NMS80

Mounting with a stilling well
The stilling well diameter that is required to protect the measuring wire without disturbing its
operation varies depending on the tank height. The stilling well could either be of constant diameter,or narrower at its upper part and wider at its lower part. The following figure shows two examples ofthe latter case, namely a concentric stilling well and an asymmetric stilling well.

A

L1

L1

L3

L3

B

D1

d

L2

L2

D1

d
r

D2

p (Lx)

D2
A0029577

 14

Mounting with concentric stilling wellA
Front view
B
Side view
L1 Length from the center of the calibration window to the upper part of the stilling well
L2 Length from the center of the calibration window to the bottom of the stilling well
L3 Length from the center of the calibration window to the bottom of the flange
D1 Diameter of upper part of stilling well
D2 Diameter of stilling welld
Diameter of displacerpLongitudinal wire position from the center of the flange(Lx)r
Radial direction offset

Endress+Hauser

35

Proservo NMS80

A

L1

L1

L3

L3

B

D1

d

L2

L2

D1

d
p (Lx)r

D2

D2
A0029576

 15

Mounting with asymmetric stilling wellA
Front view
B
Side view
L1 Length from the center of the calibration window to the upper part of the stilling well
L2 Length from the center of the calibration window to the bottom of the stilling well
L3 Length from the center of the calibration window to the bottom of the flange
D1 Diameter of upper part of stilling well
D2 Diameter of stilling welld
Diameter of displacerpLongitudinal wire position from the center of the flange(Lx)r
Radial direction offset• L3: length from center of the calibration window to the bottom of the flange built-in NMS8x(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 displacerand 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 thestilling well. Be sure to have appropriate dimensions of the stilling well according to eachdimension in the table.
• The radial direction offset (r) is required for only the 47 m (154.20 ft) and 55 m (180.45 ft)
wire drum. For all other drums, the offset is 0 mm/in.

36

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Proservo NMS80

Feature: 110

Description(Measuring range; Wire;
Diameter)

NMS80

NMS81

NMS83

r

G1

47 m (154.20 ft); 316L;
0.15 mm (0.00591 in)

6 mm (0.24 in)

H1

55 m (180.45 ft); 316L
0.15 mm (0.00591 in)

6 mm (0.24 in)

Feature: 120

Description(Displacer material; Type)

NMS80

NMS81

1AA

316L; 30 mm (1.18 in) cylindrical

30 mm (1.18 in)

1AC

316L; 50 mm (1.97 in) cylindrical

50 mm (1.97 in)

1BE

316L; 70 mm (2.76 in) conical

70 mm (2.76 in)

1BJ

316L;110 mm (4.33 in) conical

110 mm (4.33 in)

2AA

PTFE; 30 mm (1.18 in) cylindrical

30 mm (1.18 in)

2AC

PTFE; 50 mm (1.97 in) cylindrical

50 mm (1.97 in)

3ACAlloyC276; 50 mm (1.97 in)cylindrical

50 mm (1.97 in)

4AC

316L polished; 50 mm (1.97 in)cylindrical

50 mm (1.97 in)

4AE

316L polished; 70 mm (2.76 in)conical

70 mm (2.76 in)

5AC

PTFE; 50 mm (1.97 in) cylindrical,
hygienic white

50 mm (1.97 in)Parameter

DescriptiondDiameter of displacerp(Lx)Longitudinal wire position from the center of the flange
The value can be determined by using following graph.

r

Radial direction offsetsSafety factor recommended: 5 mm (0.197 in)

NMS83

d

The following graph shows the lateral shift of the displacer depending on the measured distance forthe different wire drums.

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37

Proservo NMS80

p (Lx) (mm) (in)-1.4 -1.3 -1.2 -1.1 -1.0 -0.9 -0.8 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 0.0
-36
0
100
200
300
400
500
600
700

L1, L2 (mm) (in)

800
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
2100
2200

-32

-28

-24

-20

-16

0
2000
4000
6000
8000
10000
12000
14000
16000
18000
20000
22000
24000
26000
28000
30000
32000
34000
36000
38000
40000
42000
44000
46000
48000
50000
52000
54000
56000

-12

-8

-4

0

0.1

0.2

0.3

4

8

a
b

c

d
e

f

A0027997

 16
a
b
c
d
e
f

Lateral shift of displacer according to measurement range

16 m (A3) (NMS80/NMS81/NMS83)
22 m (C2) (NMS80/NMS81/NMS83)
28 m (D1) (NMS80/NMS81)
36 m (F1) (NMS80/NMS81)
47 m (G1) (NMS81)
55 m(H1) (NMS81)

Upper diameter of stilling well
The dimension of D1 has to be the largest value of the dimensions D1a, D1b , D1c, and D1d according to
the following formula.
D1 Dimension(Example)>68.1 mm(2.68 in)38

D1x Dimension

Description

FormulaExampleParameter68.1 mm(2.68 in)

D1a

D1 dimension when thedisplacer is at the center of thecalibration window= 2 x ( |p (0)|+ d/2 + s)

65.6 mm(2.58 in)

D1b

D1 dimension when thedisplacer is at the upper part ofthe stilling well

= 2 x (|p (L1)|+ d/2 + s)

Endress+Hauser

Proservo NMS80

D1 Dimension(Example)D1x Dimension

Description

FormulaExampleParameter50.9 mm(2.00 in)

D1c

D1 dimension when the= 2 x ( |p (L2)|+ s)
displacer is at the bottom of thestilling well

D1d

D1 dimension when the radial= 2 x (d/2 + r + s)
direction offset is considered.
This calculation is used onlywith the 47 m (154.20 ft) wire
drum (G1 in Feature110) and
55 m (180.45 ft) (H1 in feature
110)

Example: L1 = 1 000 mm, L2 = 20 000 mm, d = 50 mm, s = 5.0, 28 m drum
Lower diameter of stilling well
The dimension of D2 has to be the larger value of the dimensions D1 and D2b .
See the table below.
Concentric pipe
D2 Dimension(Example)>100.9 mm(3.97 in)D2x Dimension

Description

FormulaExampleParameter68.1 mm(2.68 in)

D1

Calculated D1 value

100.9 mm
(3.97 in)

D2b

D2 dimension when the displacer is = 2 x (|p (L2)| + d/2 + s)
in L2 length

Example: L2 = 20 000 mm, d = 50 mm, s = 5.0, 28 m drum
Asymmetric pipe
D2 Dimension(Example)>84.5 mm
(3.33 in)D2x Dimension

Description

FormulaExampleParameter68.1 mm(2.68 in)

D1

Calculated D1 value

84.5 mm(3.33 in)

D2b

D2 dimension that the displacer can = |p (L2)| + d/2 + s + D1/2
pass through (nth groove)

Example: L2 = 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 thevalve.
• 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

39

Proservo NMS80

Mounting with guide wires
It is also possible to guide the displacer with guide wires to prevent swinging.

1

A

2
3
4
5
13
B
6

7
C
12

8
9

D

100 (3.94)
10
11A0026819

 17

Guide wire; dimensions mm (in)

No.

40

DescriptionA

Maintenance chamberB

Spring and sleeve

C

Guide wire sleeveD

Crimp tool

1

NMS8x

2

Reducer plate (incl. guide wire option)

3

Spring, 304 (incl. guide wire option)

4

Sleeve,316 (incl. guide wire option)

5

Maintenance chamber

6

Tank

7

Measuring wire

8

Guide wire, 316 (incl. guide wire option)

9

Displacer with rings (incl. guide wire option)

10

Anchor hook plate, 304 (incl. guide wire option)

11

Welding point

12

Wire ring, 316L

13

FlangeEndress+Hauser

Proservo NMS80

Environment
Ambient temperature range

Device–40 to +60 °C (–40 to +140 °F)

Display module –20 to +70 °C (–4 to +158 °F)
readability of the display may be impaired at temperatures outside this The
temperature range.

Classification ofenvironmental conditions
according to DIN EN
60721-3-4

4M4

Storage temperature–50 to +80 °C (–58 to +176 °F)

Humidity≤ 95 %

Degree of protection• IP66/68 according to DIN EN 60529• Type 6P/4X according to NEMA 250

Shock resistance• 10 g (11 ms) according to IEC 60721-3-4 (1995)• Classification according to IEC 60721-3-4: 4M4 (1995)
The test condition shows it without displacer.

Vibration resistance• 9 to 200 Hz, 1g (10m/s2) according to IEC 60721-3-4 (1995)• Classification according to IEC 60721-3-4: 4M4 (1995))
The test condition shows it without displacer.

Electromagnetic
compatibility (EMC)• Transient emissions according to DIN EN 61326, class B• Interference resistance according to DIN EN 61326, Appendix A (Industry use) and NAMUR
recommendation NE21

Maximum use altitude

2 000 m (6 561.68 ft) above sea level

Endress+Hauser

41

Proservo NMS80

Process
Process temperature range–200 to +200 °C (–328 to 392 °F)
If the application exceeds the range listed above, contact Endress+Hauser for technically special
products / solutions.
Process sealing
A1

HNBR

–30 to 150 °C (–22 to 302 °F)

B1

FKM

–40 to 200 °C (–40 to 392 °F)

C1CR Chloropren–25 to 100 °C (–13 to 212 °F)

D1PTFE (Wire drum FKM)

• PTFE:–100 to 200 °C (–148 to 392 °F)• Wire drum FKM: –40 to 200 °C (–49 to 392 °F)

E1

VMQ silicone–45 to 200 °C (–49 to 392 °F)

A temperature difference exists between the liquid in the tank and the NMS8x on the tanknozzle due to the distance from each other. Also, the process sealing temperature of NMS8x
does not show the temperature for the liquid temperature. The process sealing temperatureshows the temperature of the gas that reaches inside the housing of the NMS8x. In most cases,
the gas temperature is the same as the ambient temperature. If there are any temperature
differences between the process sealing and the gas, install a pipe or chamber between the
NMS8x and the tank nozzle to adjust the temperature or cover the tank with a heat insulting
material to control the temperature.

1
5

3
6
4

2

A0028848

 18
1
2
3
4
5
6

Process pressure range

42

Process sealing

Chamber or pipe for adjusting temperature
Heat insulating material
Measuring wire
Displacer
Tank wall
High or low temperature liquid

Housing type

Process pressure range

Aluminum

0 to 6 bar (600 kPa/87 psi)

Endress+Hauser

Proservo NMS80

Medium density

0.430 to 2.000 g/cm3 (27 to 125 lb/ft3)• If the application exceeds the range listed above, contact Endress+Hauser for technicallyspecial products / solutions.
• When moving a displacer down into the liquid at the point of the interface or density
measurement, see the table below.

Diameter[mm]

Material

Weight[g]

Volume[ml]

Minimum density range[g/cm3]

Maximum density range[g/cm3]

30

316L

261

84.3

0.237

2.266

30

PTFE

250

118

0.169

1.525

50

316L/AlloyC276

253

143

0.140

1.280

50

PTFE

250

118

0.169

1.525

70

316L

245

124

0.161

1.411

110

316L

223

108

0.185

1.417

Medium density difference
for interface measurement

0.1 g/cm3 (6.24 lb/ft3)

Viscosity

0 to 5 000 mPa⋅s

Maximum displacer
movement speed

Approx. 2 200 mm (86.61 in) / minEndress+Hauser

The displacer speed will be slow down in the area in front of 30 mm in order to stop at theproper position according to the low stop setting which has been specified.

43

Proservo NMS80

Custody transfer approval
As a prerequisite for custody transfer approval, the device ordered must show either option ITA, ITB,
ITC or ITD on ordering feature 150 "Accuracy, Weight + Measure approval".
Options of ordering feature 590 "Additional Approval"• LK
NMi witnessed initial verification accuracy, Weight + Measure approval• LL
PTB witnessed initial verification accuracy, Weight + Measure approval• LN
LNE witnessed initial verification accuracy, Weight + Measure approval• LO*NMi type approval• LP*PTB type approval• LQ*LNE type approval• LT
METAS, custody transfer• LU
BEV, custody transfer• Depending on the displacer (ordering feature 120) some of these versions will not be
available.
• Proservo NMS8x that are certified for Custody Transfer applications are calibrated on acertified production rig. The production rig reference standard is a laser tracker with anabsolute accuracy of ±0.010 mm and a resolution of 0.0002 mm. Calibration is performed at
10 equally-spaced measuring points over the full measuring range (up to 40 m (131 ft)).
Additionally, hysteresis is checked at three points.
• The Maximum Permissible Error (MPE) is 0.4 mm (0.016 in) for maximum performancemodels, and ±1 mm (±0.04 in) for custody transfer models. The resultant factory calibration
certificate is included in the scope of delivery along with the respective type approval
certificate.
• Ten-point calibration which is tested in accordance with ISO/IEC 17025, certified by Japan
Accreditation Board (JAB) of ILAC MRA, according to the international reference standard(étalon)44

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Proservo NMS80

Mechanical construction
Dimensions

50 (1.97)

135 (5.31)

191.5 (7.53)

48 (1.89)

77 50.15(3.03) (1.97)

268 (10.55)

292 (11.50)

208.5 (8.21)

55 (2.17)215 (8.46)

368 (14.49)a

φE
A0029578

Flanges according to ASME B16.5, Pressure rating 150 lbs 1)
D 2)

E 3)
3"

6"

8"

a

23.9 mm (0.94 in)

25.4 mm (1 in)

28.4 mm (1.12 in)E190 mm (7.5 in)279 mm (10.98 in)

343 mm (13.5 in)

1)
2)
3)

Ordering feature 140 (position AFA, AHA, and AJA of the order code)
Dimension
Nominal diameter

Flanges according to EN1092-1, Pressure rating PN10/16 1)
D 2)

E 3)
DN80

a

20 mm (0.79 in)E

200 mm (7.87 in)

1)
2)
3)

Endress+Hauser

Ordering feature 140 (position GSA of the order code)
Dimension
Nominal diameter45

Proservo NMS80

Flanges according to JIS B2220, Pressure rating 10 K 1)
D 2)

E 3)
80A RF

80A FF

150A RFa

22 mm (0.87 in)

22 mm (0.87 in)

22 mm (0.87 in)E185 mm (7.28 in)

185 mm (7.28 in)

280 mm (11 in)

1)
2)
3)

Ordering feature 140 (position PFA, PHA, and P5A of the order code)
Dimension
Nominal diameter

Flanges according to JPI 7S-15, Pressure rating 150 lbs 1)
D 2)

E 3)
80A RFa24.3 mm (0.96 in)E190 mm (7.48 in)

1)
2)
3)

WeightOrdering feature 140 (position QFA of the order code)
Dimension
Nominal diameter• Approx. 15 kg (33.0 lb) with NPS 3" Cl. 150, DN80PN10/16, 10K80A flange• Approx. 20 kg (44.1 lb) with NPS 6" Cl. 150 flange• Approx. 24 kg (52.9 lb) with NPS 8" Cl. 150 flange
The weights vary depending on the selected options.

Materials

Material of housing
Transmitter + process Alu, coated• Feature070• Option
AB
Materials of measuring wire
Ordering feature 110, various options
O 1)

W 2)

A3

16 m (52.49 ft); PFA >316L; 0.4 mm (0.016 in)

C2

22 m (73.33 ft); AlloyC276; 0.2 mm (0.008 in)

D1

28 m (93.33 ft); 316L; 0.15 mm (0.006 in)

F1

36 m (120 ft); 316L; 0.15 mm (0.006 in)

1)
2)

OptionWire descriptions

The material of the wire drum is SUS316L.
Material of process connection (flange)
NPS 3" Cl.150 RF, Aluminum flange ASME B16.5
Option of ordering feature 140 ("Process Connection")
AFA

46

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Proservo NMS80

NPS 6" Cl.150 RF, Aluminum flange ASME B16.5
Option of ordering feature 140 ("Process Connection")
AHA
DN80 PN10/16 B1, Aluminum flange EN1092-1
Option of ordering feature 140 ("Process Connection")
GSA
10K 80A RF, Aluminum flange JIS B2220
Option of ordering feature 140 ("Process Connection")
PFA
10K 150A RF, Aluminum flange JIS B2220
Option of ordering feature 140 ("Process Connection")
PHA
10K 80A FF, Aluminum flange JIS B2220
Option of ordering feature 140 ("Process Connection")
P5A
80A 150lbs RF, Aluminum flange JPI 7S-15
Option of ordering feature 140 ("Process Connection")
QFA
1

2

3

A0029583

1
2
3

Parts according to NACE
standard

Housing
FlangeMeasuring wire

In accordance with NACE MR 0175 and NACE MR 0103, the following parts highlighted in blue areavailable as NACE standard materials. For further information of standards, →  52
1

2

A0050788 19
1
2

Endress+Hauser

Parts according to NACE standard

Wire drum (28 m (91.86 ft)
Displacer (50 mm (1.97 in), 70 mm (2.76 in) / 50 mm (1.97 in) with guide ring, 70 mm (2.76 in) with guide
ring)

47

Proservo NMS80

Operability
Operating concept

Operator-oriented menu structure for user-specific tasks• Commissioning• Operation• Diagnostics• Expert level
Operating languages• English• Chinese• German• Japanese• SpanishFeature 500 of the product structure determines which of these languages is preset on delivery.
Quick and safe commissioning• Guided menus ("Make-it-run" wizards) for applications• Menu guidance with brief explanations of the individual parameter functions
Reliable operation
Standardized operation at the device and in the operating tools
Efficient diagnostics increase measurement reliability• Remedy information is integrated in plain text
• Diverse simulation options

Operating options• Local display; operation via the local display is possible without opening the device.
• Tank Gauging system• Plant Asset Management tool (e.g. FieldCare); connected via• HART• Service port (CDI)

Local operation

1

A0029584

 20
1

NMS80 Display

Display

Display elements• 4-line display• White background lighting; switches to red in event of device errors• Format for displaying measured variables and status variables can be individually configured• Permitted ambient temperature for the display: –20 to +70 °C (–4 to +158 °F)
The readability of the display may be impaired at temperatures outside the temperature range.
Operating elements• External operation via touch control; 3 optical keys: , ,• Operating elements also accessible in various hazardous areas
E

Remote display and operating module DKX001
The display and operating elements correspond to those of the display module.
Depending on the installation location, the remote display module DKX001 provides better access tothe operating elements than the display on the device.

48

Endress+Hauser

Proservo NMS80

A0042197

 21

Operation via remote display and operating module DKX001

The remote display and operating module DKX001 is available as an accessory. For details refer
to SD01763D.
• The measured value is indicated on the DKX001 and on the local display and operating
module simultaneously.
• The operating menu cannot be accessed on both modules at the same time. If the operating
menu is entered in one of these modules, the other module is automatically locked. This
locking remains active until the menu is closed in the first module (back to measured value
display).
The housing material of the display and operating module DKX001 can be selected in the order code.
There are 2 options : alu and stainless steel.
Remote operation

7

5
6

4

1

2

3

A0025621

 22
1
2
3
4
5
6
7

Endress+Hauser

Remote operation of Tank Gauging devices

Proservo NMS8x
Tankside Monitor NRF81
Micropilot NMR8x
Field protocol (e.g. Modbus, V1)
Tankvision Tank Scanner NXA820
Ethernet
Computer with operating tool (e.g. FieldCare)49

Proservo NMS80

Operation via service
interface
1

CD

I

3

2
A0030161

 23
1
2
3

50

Operation via service interface

Service interface (CDI = Endress+Hauser Common Data Interface)Commubox FXA291
Computer with "FieldCare" operating tool and "CDI Communication FXA291" COM DTM

Endress+Hauser

Proservo NMS80

Certificates and approvals
Current certificates and approvals for the product are available at www.endress.com on the relevant
product page:CE mark

1.

Select the product using the filters and search field.

2.

Open the product page.

3.

Select Downloads.

The measuring system meets the legal requirements of the applicable EU guidelines. These are listed
in the corresponding EU Declaration of Conformity together with the standards applied.
Endress+Hauser confirms successful testing of the device by affixing to it the CE mark.

RCM marking

The supplied product or measuring system meets the ACMA (Australian Communications and Media
Authority) requirements for network integrity, interoperability, performance characteristics as wellas health and safety regulations. Here, especially the regulatory arrangements for electromagnetic
compatibility are met. The products bear the RCM marking on the nameplate.

A0029561

Ex approval

Certificates are available online for the following approval types.
• AEx• ATEX• EAC Ex• FM C/US• IEC Ex• INMETRO Ex• JPN Ex
• NEPSI
Currently available certificates and approvals can be called up via the product configurator.
Additional safety instructions must be followed for use in hazardous areas. Please refer to theseparate "Safety Instructions" (XA) document included in the delivery. Reference to the applicable XA
can be found on the nameplate.
The separate documentation "Safety Instructions" (XA) containing all the relevant explosion
protection data is available from your Endress+Hauser Sales Center.

Single seal according to
ANSI/ISA 12.27.01

The devices have been designed according to ANSI/ISA 12.27.01 as single seal devices, allowing theuser to waive the use and save the cost of installing external secondary process seals in the conduit
as required by the process sealing sections of ANSI/NFPA 70 (NEC) and CSA 22.1 (CEC) These
instruments comply with the North-American installation practice and provide a very safe and costsaving installation for pressurized applications with hazardous fluids.
Further information can be found in the Safety Instructions (XA) of the relevant devices.

Functional Safety (SIL)

Use for level monitoring (MIN, MAX, range) up to SIL 2/3 according to IEC 61508:2010.
For details refer to the "Functional Safety Manual":
FY01099G

WHG

DIBt: Z-65.16-589

Weight & Measure approval• OIML R85 (2008)
• NMi
• PTB

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Proservo NMS80

• PAC
• LNE
• WELMEC
The device has a sealable locking switch according to the Weight & Measure requirements. This
switch locks all software parameters related to the measurement. The switching status isindicated on the display and via the communication protocol.
CRN approval

Some device versions have a CRN approval. Devices are CRN approved if the following two conditions
are met:• The CRN approval is selected (Product structure: Feature 590 "Additional Approval", option LD"CRN")• The device has a CRN approved process connection according to the following table:
Feature 140: Process Connection

Meaning

AFA

NPS 3" Cl.150 RF, aluminum flange ASME B16.5

AHA

NPS 6" Cl.150 RF, aluminum flange ASME B16.5

AJA

NPS 8" Cl.150 RF, aluminum flange ASME B16.5• Process connections without CRN approval are not included in this table.
• CRN approved devices are marked with the registration number OF18152.5C on the
nameplate.
Test, certificate

Other standards andguidelines

52

Ordering feature 580"Test, Certificate"

Designation

JA

3.1 Material certificate, wetted metallic parts, EN10204-3.1 inspection
certificate

KE

Pressure test, internal procedure, inspection certificate

KF

Air tightness test, internal procedure, inspection certificate

KO

Liquid penetrant test JIS B 8266 (PT), wetted/pressurized seams, test reportKS

Welding documentation, wetted/pressurized seams

Industry standards• Directive 2011/65/EU: "Restriction of Hazardous Substances" (RoHS)• Directive 2014/32/EC: "Measuring Instruments Directive" (MID)• IEC61508: "Functional Safety of Electrical/Electronic/Programmable Electronic Safety-related
Systems" (SIL)• NACE MR 0175, NACE MR 0103: "Sulfide stress cracking resistant metallic materials for oilfieldequipment"• API Recommended Practice 2350: "Overfill Protection for Storage Tanks in Petroleum Facilities"• API MPMS: "Manual of Petroleum Measurement Standards"• EN 1127: "Explosive atmospheres - Explosion prevention and protection"• IEC 60079: "Equipment protection"• EN 1092: "Flanges and their joints"• EN 13463: "Non-electrical equipment for use in potentially explosive atmospheres"• TIA-485-A: "Electrical Characteristics of Generators and Receivers for Use in Balanced Digital
Multipoint Systems "• IEC61511: "Functional safety - Safety instrumented systems for the process industry sector"• IEEE 754: "Standard for Binary Floating-Point Arithmetic for microprocessor systems "• ISO4266: "Petroleum and liquid petroleum products - measurement of level and temperature instorage tanks by automatic methods"• ISO6578: "Refrigerated hydrocarbon liquids - Static measurement - Calculation procedure"• ISO 11223: "Petroleum and liquid petroleum products - Determination of volume, density andmass of the contents of vertical cylindrical tanks by Hybrid Tank Measurement Systems"• ISO15169: "Petroleum and liquid petroleum products - Direct static measurement - Measurementof content of vertical storage tanks by hydrostatic tank gauging"• JIS K2250: "Petroleum Measurement Tables"• JIS B 8273: "Bolted flange for pressure vessels"

Endress+Hauser

Proservo NMS80• G.I.I.G.N.L.: "LNG Custody transfer handbook"• NAMUR NE043: "Standardization of the Signal Level for the Failure Information of Digital
Transmitters"• NAMUR NE107: "Self-Monitoring and Diagnosis of Field Devices"
Metrological standards• OIML R85 (2008) "Requirements for ambient temperature low –25 °C (–13 °F) and ambient
temperature high +55 °C (+131 °F)• "Mess- und Eichverordnung" (Calibration regulations for the Federal Republic of Germany)• Directive 2014/32/EC of the European Parliament and of the Council of 26 February 2014 on
measuring instruments• PTB-A-5.01: "Automatic level measuring devices for stationary storage containers"
Calibration

Calibrations with certificates are available by options.
• 3- or 5-point level calibration by factory traceable to an international reference standard (étalon)• 10-point level calibration by factory traceable to an international reference standard (étalon)• 10-point level calibration by laboratory traceable to an international reference standard (étalon)
conformed to ISO/IEC 17025 accredited by JAB, Japan Accreditation Board, of ILAC MRA

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Ordering information
Ordering information

Detailed ordering information is available from your nearest sales organizationwww.addresses.endress.com or in the Product Configurator at www.endress.com:
1.

Select the product using the filters and search field.

2.

Open the product page.

3.

Select Configuration.
Product Configurator - the tool for individual product configuration• Up-to-the-minute configuration data
• Depending on the device: Direct input of measuring point-specific information such asmeasuring range or operating language• Automatic verification of exclusion criteria• Automatic creation of the order code and its breakdown in PDF or Excel output format• Ability to order directly in the Endress+Hauser Online Shop

Calibration certificate

A calibration certificate is included if one of the following options is selected in ordering feature 150("Accuracy, Weight + Measure Approval").
Option 1)

Meaning

Number of calibration points

ICW

Standard version, 3-point calibration
certificate

3

ICX

Standard version, 5-point calibration
certificate

5

ITA

Maximum performance, 10-pointcalibration certificate

10

ITB

Maximum performance, 10-point,
extended range, acc. to OIML R85, API
3.1B, ISO4266, factory calibration
certificate

10

ITC

Standard version, 10-point calibration
certificate

10

ITD

Standard version, 10-point, extended
range, acc. to OIML R85, API 3.1B,
ISO4266, factory calibration certificate

101)

Option of ordering feature 150 "Accuracy, Weight + Measure Approval", Positions 21 to 23 of the ordercode• The calibration points are evenly spaced and spread over the selected calibration range.
• The calibration points are checked under reference conditions.
Marking

Option of ordering feature 895"Marking"

Meaning

Z1

Tagging (TAG)

Z2

Bus address

Optionally, the device can be ordered with a specific tagging and/or bus address according to thetable above. When the respective option is selected, the tag or bus address must be defined in an
additional specification.
Shipping condition54

To enable turnkey operation and commission, NMS8x is shipped in all-in-one condition except for
the following specifications.

Endress+Hauser

Proservo NMS80• 47 m (154.20 ft) measuring range• 55 m (180.45 ft) measuring range• 110 mm (4.33 in) displacer• NPS8 in flange• Cleaned from oil+grease option

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Proservo NMS80

Application packages
Advanced tank measurement
methods

The device software provides the following tank measurement methods:• Direct level measurement →  56
• Hybrid tank measurement system (HTMS) →  57
• Hydrostatic tank shell correction (HyTD) →  58
• Thermal tank shell correction (CTSh) →  58
Direct level measurement
If no advanced tank measurement methods have been selected, level and temperature are measured
directly.

Direct level measurement modes
Measuring mode

Installation example

Level only

Measured variables

1

Calculated variables

Level

None

• Level• Temperature (spot or average)

None

2

A0026820

1
2

NMS8x
To inventory management system

3

1

Level + temperature2

A0026829

1
2
3

56

NMS8x
To inventory management system
Temperature (spot or average)

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Proservo NMS80

Hybrid tank measurement system (HTMS)HTMS uses level and pressure measurements to calculate the contents of the tank and (optionally)
the density of the medium.
HTMS measuring modes
Measuring mode

Installation example

HTMS + P1

Measured variables

Calculated variables• LevelDensity of the• Bottom pressure (at position medium
D1)

1

mode should be used in atmospheric (i.e.
 Thisnon-pressurized) tanks

D1

2

3

A0026830

1
2
3

NMS8x
To inventory management system
Pressure transmitter (bottom)

HTMS + P1 + P3
mode should be used in non- atmospheric This(i.e. pressurized) tanks

D3

4• LevelDensity of the• Bottom pressure (at position medium
D1)• Top pressure (at position
D3)

1

2

3
A0026831

1
2
3
4Endress+Hauser

NMS8x
To inventory management system
Pressure transmitter (bottom)
Pressure transmitter (top)57

Proservo NMS80

Hydrostatic tank shell correction (HyTD)Δx

The hydrostatic tank shell correction can be used to compensate for vertical movement of the Gauge
Reference Height due to bulging of the tank shell caused by the hydrostatic pressure exerted by theliquid stored in the tank. The compensation is based on a linear approximation obtained frommanual hand dips at several levels distributed over the full range of the tank.

A0026832

 24

Movement Δx of the tank reference height due to the bulging of the tank shell caused by hydrostaticpressure

Thermal tank shell correction (CTSh)
The thermal tank shell correction can be used to compensate for vertical movement of the Gauge
Reference Height due to temperature effects on the tank shell or stilling well. The calculation isbased on the thermal expansion coefficients of steel and on insulation factors for both the dry andwetted part of the tank shell.
• This correction is recommended for any tank gauge operating at conditions deviating
considerably from the conditions during calibration and for extremely high tanks. For
refrigerated, cryogenic and heated applications this correction is highly recommended.
• Wire length can also be corrected with the parameters related to CTSh.
Level reference check (LRC)
For tanks where a manual dipping cannot be performed the level gauge can be verified by means of
the LRC function.
If the measured level value is not verified by the LRC function applied, the device will issue an error
message regarding the measured level.
This reference check is recommended for liquefied gas applications.
LRC with reference level
The radar device compares it's own level reading with the level reading of another level gauge (e.g.
Proservo NMS8x). Based on a configurable deviation value (Allowed difference parameter), a
continuous check is performed.

58

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Proservo NMS80

5
6

4

3

a

7

1

a

8
2

9

A0053872

 25
1
2
3
4
5
6
7
8
9

Application example with Proservo NMS8x

Lower limit of deviation value "a" as configured in radar level gauge
Reference value: Measured level as provided by level gauge Proservo NMS8x
Upper limit of deviation
Proservo NMS8x provides the reference value
Level gauges are interconnected via HART interface
Radar level gauge with configured deviation value "a" for "Allowed difference" parameter
The measured level is greater than reference value plus deviation value "a": Level value is not verified
The measured level is within or equal to the limits defined by the deviation value "a": Level value is verified
The measured level is less than reference value minus deviation value "a": Level value is not verified

Properties• Frequency: The reference check is performed continuously every 60 seconds.
• Tolerance: Via the Check fail threshold parameter, a configurable number of failures is allowed
before the status switches to failed.
• Connection: The level reference device is connected via an optional HART I/O board.
See ordering feature 050: "Secondary I/O Analogue".
LRC with reference switch
A level switch (e.g. Liquiphant FTLx) can be mounted within the tank. The check can be performed
continuously, each time the level switch is activated or deactivated. The measured level should
remain within a configurable deviation.

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Proservo NMS80

4

3

a

6

1

a

7
2

8

A0054210

 26
1
2
3
4
5
6
7
8

Application example with level switch

Lower limit of deviation value "a" as configured in radar level gauge
Reference value: The switching point of an installed level switch represents the reference value for verification
Upper limit of deviation
Level switch and level gauge are interconnected via a digital I/O board
Radar level gauge with configured deviation value "a" for "Allowed difference" parameter
The measured level is greater than reference value plus deviation value "a": Level value is not verified
The measured level is within or equal to the limits defined by the deviation value "a": Level value is verified
The measured level is less than reference value minus deviation value "a": Level value is not verified

Properties• Modes: The device can be set to monitor the switching point while filling or draining the tank.
• Connection: The level switch is connected via a digital I/O board.
See ordering feature 060: "Secondary I/O Digital Ex d/XP".

60

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Proservo NMS80

Accessories
Device-specific accessories

Weather protection cover

56.1 (2.21)

32.5 (1.28)

319 (12.6)

471.6 (18.6)

A0029585

 27

Weather protection cover; dimensions: mm (in)Materials• Protection cover and mounting brackets
Material
316L (1.4404)• Screws and washers
Material
A4• The weather protection cover can be ordered together with the device:
Ordering feature 620 "Accessory Enclosed", option PA "Weather Protection Cover")• It can also be ordered as an accessory:
Order code: 71305035 (for NMS8x)

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Proservo NMS80

Maintenance chamber
A maintenance chamber is recommended for use with tank level gauges in order to allow
maintenance (removing the 70 mm (2.76 in) displacer or larger), while the tank is in service.
Contact your Endress+Hauser Sales Center if necessary.
Ball valve
Ball valves are recommended for use with tank level gauges in order to allow maintenance such as
removing displacers while tank is in service. Contact your Endress+Hauser Sales Center if necessary.
Control switch
A control switch is used for field mounted tank gauges. This provides additional gauge operation
contact switching in order to control the gauge’s operation, such as hoisting up the displacer. Contact
your Endress+Hauser Sales Center if necessary.
Relief valve and pressure gauge
A

B

1

1

2
2

A0029104

 28
A
B
1
2

62

Mounting position of relief valve and pressure gauge

Standard version
90 °-degree rotation (optional)
Pressure gauge
Relief valve

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Proservo NMS80

Relief valve
A relief valve is used to release pressure inside the housing of NMS8x before maintenance.
Contact your Endress+Hauser Sales Center when applying pressure in an ammonia atmosphere.

A0028881

 29

Relief valve

Pressure gauge
A pressure gauge is used to check process pressure inside the housing.

A0028882

 30

Pressure gauge

The range of the scale for the pressure gauge varies depending on the pressure.
• Low pressure: 0 to 1 MPa• High pressure: 0 to 4 MPa

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Proservo NMS80

Cleaning nozzle and gas purging nozzle
A cleaning nozzle used for washing inside housing is especially recommended for F&B or alcohol
applications.
A gas purging nozzle used for purging gas inside the housing is especially recommended for anitrogen blanket for petrochemical or chemical applications.
1

2

A0030103

 31
1
2

Holes for cleaning nozzle and gas purging nozzle

Cleaning nozzle
Gas purging nozzle

Other combinations for relief valve, pressure gauge, cleaning nozzle, and gas purging nozzle
Cleaning nozzle and relief valve
A

B
1

1
2

2

A0051205

 32
A
B
1
2

64

Cleaning nozzle and relief valve

Standard version
90 °-degree rotation (optional)
Cleaning nozzle
Relief valve

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Proservo NMS80

Pressure gauge and gas purging nozzle
1

2

A0051270 33
1
2

Endress+Hauser

Pressure gauge and gas purging nozzle

Pressure gauge
Gas purging nozzle

65Proservo NMS80

Communication-specificaccessories

WirelessHART adapter SWA70• Is used for the wireless connection of field devices• The WirelessHART adapter can be easily integrated into field devices and existing infrastructures,
offers data protection and transmission safety and can be operated in parallel with other wirelessnetworks
For details, see Operating Instructions BA00061S
Gauge Emulator, Modbus to BPM• Using the protocol converter, it is possible to integrate a field device into a host system even if the
field device does not know the communication protocol of the host system. Eliminates vendor lockin for field devices.
• Field communication protocol (field device): Modbus RS485• Host communication protocol (host system): Enraf BPM• 1 measuring device per Gauge Emulator• Separate power supply: 100 to 240 VAC, 50 to 60 Hz, 0.375 A, 15 W
• Several approvals for the hazardous area
Gauge Emulator, Modbus to TRL/2• Using the protocol converter, it is possible to integrate a field device into a host system even if the
field device does not know the communication protocol of the host system. Eliminates vendor lockin for field devices.
• Field communication protocol (field device): Modbus RS485• Host communication protocol (host system): Saab TRL/2• 1 measuring device per Gauge Emulator• Separate power supply: 100 to 240 VAC, 50 to 60 Hz, 0.375 A, 15 W
• Several approvals for the hazardous area

Service-specific accessories

Commubox FXA195 HART
For intrinsically safe HART communication with FieldCare via the USB interface
For details, see "Technical Information" TI00404F
Commubox FXA291
Connects Endress+Hauser field devices with a CDI interface (= Endress+Hauser Common Data
Interface) and the USB port of a computer or laptop
Order number: 51516983
For details, see "Technical Information" TI00405C
DeviceCare SFE100
Configuration tool for HART, PROFIBUS and FOUNDATION Fieldbus field devices
DeviceCare is available for download at www.software-products.endress.com. You need to register inthe Endress+Hauser software portal to download the application.
Technical Information TI01134S
FieldCare SFE500
FDT-based plant asset management tool
It can configure all smart field units in your system and helps you manage them. By using the status
information, it is also a simple but effective way of checking their status and condition.
Technical Information TI00028S

System components

RIA15
Compact process display unit with very low voltage drop for universal use to display 4 to 20 mA/
HART signals
Technical Information TI01043K
Tankvision Tank Scanner NXA820 / Tankvision Data Concentrator NXA821 / Tankvision Host
Link NXA822
Inventory Management System with completely integrated software for operation via standard webbrowser
Technical Information TI00419G

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Proservo NMS80

Documentation
The following documentation types are available in the Downloads area of the Endress+Hauser
website (www.endress.com/downloads):
For an overview of the scope of the associated Technical Documentation, refer to the following:• Device Viewer (www.endress.com/deviceviewer): Enter the serial number from thenameplate• Endress+Hauser Operations app: Enter serial number from nameplate or scan matrix code on
nameplate.
Technical Information (TI)

Planning aid
The document contains all the technical data on the device and provides an overview of theaccessories and other products that can be ordered for the device.

Brief Operating Instructions(KA)

Guide that takes you quickly to the 1st measured value
The Brief Operating Instructions contain all the essential information from incoming acceptance toinitial commissioning.

Operating Instructions (BA)The Operating Instructions contain all the information that is required in various phases of the life
cycle of the device: from product identification, incoming acceptance and storage, to mounting,connection, operation and commissioning through to troubleshooting, maintenance and disposal.
It also contains a detailed explanation of each individual parameter in the operating menu (except
the Expert menu). The description is aimed at those who work with the device over the entire life
cycle and perform specific configurations.

Description of Device
Parameters (GP)The Description of Device Parameters provides a detailed explanation of each individual parameter inthe 2nd part of the operating menu: the Expert menu. It contains all the device parameters andallows direct access to the parameters by entering a specific code. The description is aimed at those
who work with the device over the entire life cycle and perform specific configurations.

Safety Instructions (XA)

Depending on the approval, the following Safety Instructions (XA) are supplied with the device. They
are an integral part of the Operating Instructions.
The nameplate indicates the Safety Instructions (XA) that are relevant to the device.

Installation instructions (EA)

Installation Instruction are used to replace a faulty unit with a functioning unit of the same type.

Registered trademarks
Modbus®
Registered trademark of SCHNEIDER AUTOMATION, INC.

Endress+Hauser

67*71629836*
71629836

www.addresses.endress.com