Endress+Hauser Proservo NMS 5 series, Proservo NMS 7 series Technical Information
TI 006N/08/en/04.09
Software Ver. 4.27C
Technical Information
Proservo NMS 5/7 series
Intelligent tank gauge with high accuracy performance
Liquid level, I/F, Density & Density Profile
Application
The Proservo NMS 5/7 series of intelligent tank gauges is
designed for high accuracy liquid level measurement in
storage and process applications.
They fulfill the exact demands of tank inventory
management, loss control, total cost saving and safe
operation.
Typical areas of application include:
• Oil (fuels)
• LPG/LNG
• Chemicals
• Water / chemical interface measurement
• Foods, Liquid Food
Tank mounted intelligence makes the Proservo NMS 5/7
series ideal for single or multi-task installation, converting a
wide range of measurement functions including:
• Liquid level
• Interface level
• Spot density
• Density profile
• Tank bottom
• Water dip
Features and benefits
• Measures liquid to an accuracy of +/- 0.7 mm
• Measures two clear interface levels and specific gravity of
up to three liquid phases
• Profiling of Iiquid density throughout the tank (Tank
profile) and upper layer (I/F profile)
• Latest microtechnology keeps the design simple,
lightweight and compact
• Wetted parts are completely separated from the
electronic circuit
• Tank top mounting with 3” flange weighing only 12 kg
(aluminum version)
• Wide range of output signals including V1, RS 485,
WM550, M/S, Enraf BPM and HART® protocol
• Material and pressure rating of the wetted parts can be
selected according to the application.
• Suitable for atmospheric and high pressure applications
up to 25 bar
• Maintenance prediction of the instrument
• Direct connection of spot or average temperature probes
• Easy to program using the E+H matrix system
• Robust IP67 housing
• Proactive safety diagnostics output to display and System
Operators (patent pending)
ProdName
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Table of Contents
Function and system design . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Measuring System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Major Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Operating Principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Typical Tank installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Measurement terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Input for local devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Output 8
Output parameters based on communication protocol . . . . . . . . .8
RS485 Modbus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Bidirectional serial pulse (V1 protocol) . . . . . . . . . . . . . . . . . . . . .9
HART Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Whessoematic 550 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Mark / Space . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Enraf Bi Phase Mark (BPM) . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Analogue output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Safe electrical isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Electrical for Primary output V1Serial Pulse
Modbus RS 485 HART Enraf BPM . . . . . . . . . . . . . . . . . . . . . .13
Electrical for Primary output WM 550 . . . . . . . . . . . . . . . . . . . .14
Electric for Primary output M/S . . . . . . . . . . . . . . . . . . . . . . . .15
Bus Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Rack Bus & Modbus (RS485 Output) . . . . . . . . . . . . . . . . . . . . .16
Sakura V1 Serial Pulse Ouput . . . . . . . . . . . . . . . . . . . . . . . . . .16
Enraf Bi Phase Mark Output . . . . . . . . . . . . . . . . . . . . . . . . . . .17
HART Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Whessoematic 550 (WM 550) Output . . . . . . . . . . . . . . . . . . .17
Varec Mark Space (M/S) Output . . . . . . . . . . . . . . . . . . . . . . . .18
Performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . .19
Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Ambient condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Liquid temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Mechanical construction . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Design, dimensions Housing materials of Construction . . . . . . . 20
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Flange type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Operating presse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Measuring range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Measuring wire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Displacer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Cable entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Human interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Operating concept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Display(LCD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Memo function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Advanced Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Maintenance Prediction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Automatic Displacer Weight Compensation . . . . . . . . . . . . . . . 23
Automatic Compensation of Wire Length . . . . . . . . . . . . . . . . . 23
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Certificates and Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Ex approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Custoday transfer approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Overspill protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
External standards and guidelines . . . . . . . . . . . . . . . . . . . . . . 24
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Proservo NMS5.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Proservo NMS7..(Sanitary version) . . . . . . . . . . . . . . . . . . . . . . 28
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Calibration Chamber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Power+Control Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Ball Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Reducing Flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Supplementary Documentation . . . . . . . . . . . . . . . . . . . . . .36
Technical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Operating Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Compact Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Stainless Steel conversion table . . . . . . . . . . . . . . . . . . . . . . . . 37
Proservo
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Function and system design
Measuring System The Proservo NMS 5/7 is an intelligent tank gauge for high accuracy liquid level measurement employing the
latest microprocessor technology. As well as level measurement, Proservo NMS 5/7 can determine the interfaces between three liquids, specific gravity of these liquids and tank bottom. To enable accurate volume calculation or simply for indication, Proservo NMS 5/7 will accept an input from either an average temperature
probe NMT 53x series (via twisted pair cables, HART protocol) or via spot temperature element (via 3 wire Pt.
100 RTD signal). Once installed, all calibration and operating functions can be made via the user friendly
Matrix program and touch sensitive keypad. Tank side monitoring and operation can be performed by the
Promonitor NRF 560.
Prothermo
Proservo
Power (AC / DC)
Outputs
HART
Promonitor
Level
Interface
Density
Water dip
Bottom
Power
(AC / DC)
HART
HART
to a HOST system
in a control room
Temp.
Power (AC / DC)
Power (AC / DC)
Proservo
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System Configuration • From single tank level measurement to the largest oil refinery application, Proservo is an integral part of tank
farm management solutions. A wide variety of data output protocols is available for seamless integration into
many commonly used systems.
• The primary example is Endress+Hauser’s revolutionary Tankvision, a scalable concept offering local tank
management for up to 225 tanks via Modbus, V1 or Whessomatic 550 protocols. Collected data is available
to DCS and other plant management systems via a Host Link.
• Other examples include Endress+Hauser’s legacy systems such as MDP V1 Interface, FuelsManager, Tank
Computers NRM571 and NRS57.
• Output protocols
•Modbus, RS485 or current loop
•V1 serial pulse
•Whessomatic 550
•HART
•Mark/Space
•
Enraf BPM
Proservo NMS 5/7 system configuration Serial pulse output
Major Application The number of measuring functions and output options as well as the lightweight compact design enables
Proservo NMS 5/7 to be installed in a wide range of applications at minimal cost.
Petroleum Industry
From the production of oil to storage at an oil depot, there is a need to measure and manage a wide variety of
products. A remote tank gauging and inventory management system combined with Proservo NMS 5 and a
receiving computer is an ideal way to measure and control the contents of the tanks.
Chemical Industry
For this industry, a wide choice of materials is available for the construction of the wetted parts, to ensure
chemical compatibility and long life.
Food Industry
In the brewing and beverage industries, where large volume of water or water-based products are being
handled, it is essential to obtain a precise level measurement to establish low cost production. Proservo NMS
7 can be supplied with a built in CIP nozzle if required.
Power Plant
Fuel oil levels are major applications where precise measurement is required to ensure safe operation.
Operating Principle The Proservo NMS 5/7 tank gauging system is based on the principle of displacement measurement.
A small displacer is accurately positioned in the liquid medium using a servo motor. The displacer is suspended
on a measuring wire which is wound onto a finely grooved drum housing within the instrument.
HART
HART
HART
Modbus
SCADA
DCS/PLC
ModbusModbus
SCADA
DCS/PLC
Device Config
Host Link
LAN
TCP/IP
Data Concentrator
Data Scanner
(Field Protcol)
V1, Modbus
Data Scanner
Proservo
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The drum is driven via coupling magnets which are completely separated by the drum housing. Outer magnets
are connected to the wire drum whilst the inner magnets are connected to the drive motor. As the magnets
turn, its magnetic attraction causes the outer magnets to turn as well, as a result turning the entire drum
assembly. The weight of the displacer on the wire creates a torque on the outer magnets generating the change
of magnetic flux. These changes generated between the drum assembly are detected by a unique
electromagnetic transducer on the inner magnet. The drive motor is actuated to balance the voltage generated
by the variations of magnetic flux to equal the reference voltage defined by the operating command.
When the displacer is lowered and touches the liquid, the weight of the displacer is reduced because of the
buoyant force of the liquid. As a result, the torque in the magnetic coupling is changed and this change is
measured by 5 sets of Hall sensors, (patented) chips which are temperature compensated. The signal, an
indication of the position of the displacer, is sent to the motor control circuit. As the liquid level rises and falls,
the position of the displacer is adjusted by the drive motor. The rotation of the wire drum is precisely evaluated
to determine the level value which is accurate to an outstanding +/- 0.7 mm.
Direct Torque Detection
Wire drum
Outside magnet
Inside magnet
Weight
signal
Weight data
Displacer
position
data
Encoder
Motor drive signal
Motor
Displacer
Measurement
wire
Hall element
Proservo
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Typical Tank installation
E
-
+
Ball Valve
Reducer
Meas. Wire
Displacer
Still well
Proservo NMS5/7
Prothermo NMT
Measuring wire
Displacer
Still well
B
E
+
Prothermo NMT
Proservo NMS5/7
E
+
Measuring wire
Displacer
Still well
Proservo NMS5
Prothermo NMT
E
+
Measuring wire
Displacer
Proservo NMS5/7
Fixed roof tank with stilling well
High pressure tank with stilling well and ball valve
Floating roof tank and/or covered floating roof tank
Note: When the proservo is installed on Floating
roof tank, be sure to use Stilling Well
Proservo
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Measurement terminology
NMS 5/7 Proservo with standard level, I/F x 2, Tank bottom and spot density x 3 measurement
Left: Density Profile measurement "I/F (Interface) Profile" measurement range
Right: Density Profile measurement "Tank Profile" measurement range
Level
Upper I/F
Middle I/F
Upper
Density
Middle
Density
Lower
Density
Tank
Bottom
Level
Upper I/F
Tank
floor
Water
Emulsion
Oil
Density measured point
(2 ~ 16 points selecta ble)
between level to upper I/F
Density measured point
(2 ~ 16 po ints selectab le)
Throughout liquid
Tank Profile
True average
density throughout
the tank
I/F Profile
True average
density within
Upper layer
Proservo
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Input
Input for local devices
Output
Output parameters based on
communication protocol
Remarks
1. Upper I/F output value can be either selected from the Proservo’s own displacer measurement or Water
Bottom measured value via the Prothermo NMT 539.
2. A single point density measurement within the upper layer liquid in the tank. The measurement position
is configured to 150mm below the liquid surface at default.
3. A single point density measurement within the middle layer liquid in the tank. The measurement position
is configured to 150mm below the upper interface level at default.
4. A single point density measurement within the lower layer liquid in the tank. The measurement position
is configured to 150mm below the middle interface at default
5. The value of this “Average Density” is based on the calculation after performing the Density Profile operation at the Proservo.
6. All of the selected number of density measured value from 1 ~ 16 points can be transmitted.
Signal Multi drop local HART® protocol max. 4 devices
Power supply DC 24V
Additional units NMT 53x average temperature sensor
NRF 560 field data processor
Other - compatible HART® devices
Spot temperature Pt 100 Ohm ISO standard three wire connection
V1(new) V1 (old) MODBUS HART WM550 ENRAF M/S
Level Yes Yes Yes Yes Yes Yes Yes
Temperature (Product) Yes Yes Yes Yes Yes Yes Yes
Vapor Temperature Yes - Yes Yes Yes - -
Upper I/F (Water Level) *1 Yes - Yes Yes Yes Yes -
Middle I/F Yes - Yes Yes - - -
Upper D e nsity *2 Yes - Yes Yes Yes - -
Middle Densuty*3 Yes - Yes Yes - -
Lower Density*4 Yes - Yes Yes - -
Average Dens ity *5 Yes - Yes - Yes - -
1-16 points Individual Density *6 Yes - Yes - - - -
Multi-Element Temperature Yes - Yes Yes Yes -- -
HART device input (Device 1) Yes - Yes Yes Yes - -
HART device input (Device 2) Yes - Yes Yes Yes - -
Alarm / Discrete V alue Yes Yes Yes Yes Yes Yes -
Protocol Documentation - - KA0002N - KA001N - -
Proservo
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RS485 Modbus
Bidirectional serial pulse
(V1 protocol)
HART Protocol
Module name Commdule RS 485 communication module (~2008),
COM - 5 (2009~)
No. of unit Maximum 10 instruments per loop
Baud rate 600/1,200/ 2,400/ 4,800/ 9,600/ 19,200 bit/s, selectable
Parity Odd, Even, None, selectable
Cable Two wire twisted cable with screening (DGND is connected to the
ground cable)
Topology Serial bus, electrically isolated, tree structure
Transmission distance Maximum 1,200 m including limbs or branches (negligible with
branches under 3 m)
Instrument address Accessed via touch control
Isolation Bus inputs are electrically isolated from the other electronics
Module name COM - 1
No. of units Maximum 10 instruments per loop
Baud rate 3,300 BPS
Cable Two wire (twisted pair) unscreened cable
Topology Serial bus, tree structure
Transmission distance Maximum 6,000 m
Instrument address Accessed via touch control
Isolation Serial communication circuit isolated from other circuits
Module name Commdule HART (2009), COM - 6 (2009~)
No. of units Maximum 15 instruments per loop
Baud rate 1,200 BPS
Cable Two wire, twisted pair screened cable Minimum core φ 0.15
(24AWG)
Transmission distance Maximum 1,200 m
Instrument address Accessed via touch control
Isolation Bus input are electrically isolated from the other electronics
Proservo
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Whessoematic 550
Mark / Space
Enraf Bi Phase Mark (BPM)
Module name WM550 communication module
No. of units 15 instruments per loop (connected to RTU)
Baud rate 1,200 / 2,400 bit/s
Cable Two wire, twisted cable with screening
Topology 20 mA current loop
Transmission distance Depending on specifications (ask your E+H engineer)
Instrument address Setting by DIP switches on communication board
Isolation Current loop circuit isolated from other circuits
Module name Mark/Space communication module
No. of units Depending on specification (ask to E+H engineer)
Baud rate 1,200 / 2,400 / 4,800 / 9,600 / 19,200 bit/s
Cable Four wire
Topology Serial bus, tree structure
Transmission distance Depending on specifications (ask your E+H engineer)
Instrument address Setting by DIP switches on communication board
Isolation Serial pulse isolated from other circuits
Module name COM - 3
No. of units Maximum 10 instruments per loop
Baud rate 1,200, 2,400 bit/s, selectable
Cable Two wire, twisted cable with screening
Topology Serial bus, electrically isolated, tree structure
Transmission distance Maximum 10 km
Instrument address Accessed via touch control
Isolation Serial communication circuit isolated from other circuits
Proservo
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Analogue output
Relay
Module name I/O - 5
Output 4...20 mA, two channeles freely assignable value
On alarm Switchable +110%, -10% or hold last measured value
Electrical isolation Analogue output isolated from other circuits
Adjustable damping 0 to 99 s
Maximum load 500 ohm
Load effect Negligible
Module name I/O - 3
Version 4 relays with potential free change-over contacts, freely assignable to
measured value
Hysteresis Switch points and switching hysteresis freely adjustable, residual
current fail-safe mode: minimum or maximum, selectable
Switching capacity AD max. 2 A, max. 250 V, max. 62.5 VA
DC max. 2 A, max. 220 V, max. 60 W
For FM / CSA: 5A250VAC, 8A250VAC
Proservo
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Power supply
Supply voltage High voltage type: 85 ... 264 VAC 50/60 Hz
Low voltage type: 20 ... 60 VDC / 20 ... 55 VAC 50/60Hz
Caution!
Allowable voltage supply is specifically stated depending on each Ex approvals. Refer to the designated
certification
Power consumption Maximum 50 VA, 50W (cos j=0.5)
Safe electrical isolation Between power supply and signal output, CPU, RS 485, relay and other electronics
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