Endress+Hauser Proservo NMS81 Technical Information
Tank gauging
Hide thumbs
Also See for Proservo NMS81:
- Functional safety manual (32 pages) ,
- Brief operating instructions (72 pages)
Table of Contents
Advertisement
Quick Links
TI01249G/00/EN/02.17
71318275
Products
Technical Information
Proservo NMS81
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), LPG/LNG,
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 and
integrating a wide range of tank sensor measurement functions including Water
level, Temperature, and Pressure.
Your benefits
• SIL2 certified (Min, Max, Continuous level)
• SIL3 (in preparation)
• Measures liquid level to an accuracy of +/- 0.4 mm (0.016 in)
• Measurement of up to two interface levels and density of up to three 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 25 bar/2.5 MPa/
362 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
• Operation and display in a wide variety of local languages
• Easy commissioning, maintenance, and diagnostics via FieldCare
Solutions
Services
Advertisement
Table of Contents
Related Manuals for Endress+Hauser Proservo NMS81
Summary of Contents for Endress+Hauser Proservo NMS81
- Page 1 Solutions Services TI01249G/00/EN/02.17 71318275 Technical Information Proservo NMS81 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.
-
Page 2: Table Of Contents
Proservo NMS81 Table of contents Document information ..... . . 3 Mechanical construction .... -
Page 3: Document Information
Proservo NMS81 Document information Symbols Safety symbols Symbol Meaning DANGER! This symbol alerts you to a dangerous situation. Failure to avoid this situation will DANGER result in serious or fatal injury. WARNING! This symbol alerts you to a dangerous situation. Failure to avoid this situation can WARNING result in serious or fatal injury. - Page 4 Proservo NMS81 Symbols in graphics Symbol Meaning 1, 2, 3 ... Item numbers … Series of steps A, B, C, ... Views A-A, B-B, C-C, ... Sections Hazardous area Indicates a hazardous area. Safe area (non-hazardous area) Indicates the non-hazardous area.
-
Page 5: Function And System Design
Proservo NMS81 Function and system design Measuring principle NMS8x is an intelligent tank gauge for measuring liquid levels with high precision. The system is based on the principle of gauging displacement. A small displacer is accurately positioned in a liquid medium using a stepping motor. The displacer is then suspended on a measuring wire which is wound onto a finely grooved wire drum. -
Page 6: Integration Of Tank Sensors
Proservo NMS81 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 be displayed on the built-in display. They can be transferred to an inventory control system via a field communication protocol. - Page 7 Proservo NMS81 Typical tank installation A0026725 3 Typical tank installation Fixed roof tank High pressure tank Floating roof tank with stilling well NMS8x Ball valve Measuring wire Displacer Stilling well Prothermo NMT53x When installing NMS8x to a floating roof tank, be sure to use a stilling well to protect the measuring wire.
- Page 8 Proservo NMS81 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: •...
- Page 9 Proservo NMS81 A0026728 5 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)
- Page 10 Proservo NMS81 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 the most suitable displacer for your application. Displacer types The following NMS8x displacers are available.
- Page 11 Proservo NMS81 Displacer dimensions Ø30(1.18) Ø30(1.18) A0029579 ⌀30 mm (1.18 in) 316L cylindrical displacer ⌀30 mm (1.18 in) PTFE cylindrical displacer Immersion point ⌀30 mm (1.18 in) 316L ⌀30 mm (1.18 in) PTFE Item cylindrical displacer cylindrical displacer Weight (g) Volume (ml) 84.3...
- Page 12 Proservo NMS81 Ø50.8 (2) Ø50.8 (2) Ø50 (1.97) A0029580 ⌀50 mm (1.97 in) 316L cylindrical displacer ⌀50 mm (1.97 in) AlloyC cylindrical displacer ⌀50 mm (1.97 in) PTFE cylindrical displacer Immersion point ⌀50 mm (1.97 in) 316L ⌀50 mm (1.97 in) AlloyC ⌀50 mm (1.97 in) PTFE...
- Page 13 Proservo NMS81 Ø110 (4.33) Ø70(2.76) A0029582 ⌀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) Volume (ml) Balance volume (ml) 52.8...
- Page 14 Proservo NMS81 Density Since the density is the calculated result of two measurements, a displacer with higher volume will usually yield the most accurate density measurement. In most cases we recommend our 50 mm (1.97 in) diameter displacer for density measurement.
-
Page 15: Measuring System
Proservo NMS81 Measuring system • From single tank level measurement to the largest oil refinery applications, Endress+Hauser tank gauging 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. -
Page 16: Input/Output
Proservo NMS81 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: liquid surface level and interface level(s) between different liquids, as well as finding tank bottom or datum plate. -
Page 17: Hart 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 the average temperature of the product. -
Page 18: I/O Modules
Proservo NMS81 I/O modules Overview POWER POWER 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. - Page 19 Proservo NMS81 Ordering feature 060: "Secondary IO Digital Exd" NMx8x - xxxx xx xx XX Option Number of I/O modules Type of I/O module Number of terminals Technical data 1 x "2x relay + 2x discrete I/O" 1 x 4 →...
- Page 20 Proservo NMS81 "V1": Technical data No. of units Maximum 10 instruments per loop Baud rate 3 300 bit/s Parity Selectable: • Odd • Even • None Cable • Two-wire twisted pair; screening recommended • Two-wire unscreened Termination resistors Not required Topology •...
- Page 21 Proservo NMS81 "4-20mA HART" I/O module (Ex d/XP or Ex i/IS): Technical data General data No. of units Max. 6 instruments per loop Baud rate 1 200 bit/s Cable Two-wire, twisted pair screened cable; Core cross section: 0.2 to 2.5 mm...
- Page 22 Proservo NMS81 Data for passive usage (input or output) POWER POWER A0033030 9 Passive input or output: Use terminals 1 and 2 Minimum terminal voltage 10.4 V Maximum terminal voltage 29 V Data for active usage (input or output)
- Page 23 Proservo NMS81 "Digital I/O module": Technical data Output Relay switching power for resistive load • 30 V @ 2 A • 250 V @ 0.1 A • 250 V @ 2 A Relay type normally open; can be set to "normally closed" by a software option...
-
Page 24: Power Supply
Proservo NMS81 Power supply Terminal assignment POWER POWER G1 N AC 85...264 V G3 L A0027012 11 Terminal compartment (typical example) and ground terminals Terminal area Module Up to four I/O modules, depending on the order code • Modules with four terminals can be in any of these slots. - Page 25 Proservo NMS81 NXA820 INST STOP LIFT A0029538 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.
-
Page 26: Supply Voltage
Proservo NMS81 Proservo NMS5/NMS7 By display From NRF560 From digital input From Fieldbus Command Priority Command Priority Command Priority Command Priority Level Level Level Level Interface Interface Interface Interface Tank bottom Tank bottom Tank bottom Spot density Spot density Spot density... -
Page 27: Cable Specification
Proservo NMS81 Cable entries Ordering feature 090 "Electrical Connection" Cable entries (with blind plugs) 7 x thread M20 7 x thread M25 7 x thread G1/2 7 x thread G3/4 7 x thread NPT1/2 7 x thread NPT3/4 Position 13 of the order code, e.g. NMx8x-xxxxxxxxxxxxA... -
Page 28: Performance Characteristics
Proservo NMS81 Performance characteristics Reference operating According to OIML R85 conditions Measured value resolution Level and interface ≤ 0.1 mm (0.004 in) Density ≤ 0.001 g/cm Maximum measured error Level ±0.4 mm (±0.015 in) Interface ±2 mm (±0.08 in) Tank bottom ±2 mm (±0.08 in) -
Page 29: Long-Term Drift
Proservo NMS81 Long-term drift Within the specified error of measurement Influence of ambient Within the specified accuracy according to OIML R85 (2008) temperature Influence of medium None (Displacer principle is not influenced by medium temperature.) temperature Influence of medium No influence of medium pressure to the measuring principle. -
Page 30: Installation
Proservo NMS81 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 well With guide wires Fixed roof tank Floating roof tank... - Page 31 Proservo NMS81 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 of the latter case, namely a concentric stilling well and an asymmetric stilling well.
- Page 32 Proservo NMS81 p (L ) x A0026733 13 Mounting with asymmetric stilling well Front view Side view Length from the center of the calibration window to the upper part of the stilling well Length from the center of the calibration window to the bottom of the stilling well...
- Page 33 Proservo NMS81 Feature: 110 Description NMS80 NMS81 NMS83 (Measuring range; Wire; Diameter) 47 m (154.20 ft); 316L; 6 mm (0.24 in) 0.15 mm (0.00591 in) 55 m (180.45 ft); 316L 6 mm (0.24 in) 0.15 mm (0.00591 in) Feature: 120...
- Page 34 Proservo NMS81 p (Lx) (mm) ( ) -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 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000 22000 24000 1000 26000 1100 28000 30000 1200...
- Page 35 Proservo NMS81 Dimension Dimension Description Formula (Example) Example Parameter 50.9 mm dimension when the = 2 x ( |p (L )|+ s) (2.00 in) displacer is at the bottom of the stilling well dimension when the radial = 2 x (d/2 + r + s) direction offset is considered.
- Page 36 Proservo NMS81 Mounting with guide wires It is also possible to guide the displacer with guide wires to prevent swinging. 100 (3.94) A0026819 15 Guide wire; dimensions mm (in) Description Calibration chamber Spring and sleeve Guide wire sleeve Crimp tool...
-
Page 37: Environment
Proservo NMS81 Environment Ambient temperature range Device –40 to +60 °C (–40 to +140 °F) Display module –20 to +70 °C (–4 to +158 °F) The readability of the display may be impaired at temperatures outside this temperature range. -
Page 38: Process
Proservo NMS81 Process Process temperature range –200 to +200 °C (–328 to 392 °F) Process pressure range Housing type Process pressure range Stainless steel 0 to 25 bar(2.5 MPa/0 to 362 psi) Standard Rating 10 K 14 bar 1.4 MPa... -
Page 39: Custody Transfer Approval
Proservo NMS81 Custody transfer approval Ordering feature 150 Accuracy properties "Accuracy, Weight + Measure Approval" Standard version (±1 mm), without calibration certificate Standard version (±1 mm), 3-point calibration certificate Standard version (±1 mm), 5-point calibration certificate Maximum performance (±0.4 mm), type approval according to NMi, OIML R85, API 3.1B, ISO4622, factory calibration certificate... -
Page 40: Mechanical Construction
Proservo NMS81 Mechanical construction Dimensions 227.5 (8.96) 414 (16.8) 314 (12.36) 48 (1.89) 218 (8.58) 73 (2.87) 218 (8.58) A0026821 The thickness of the flange (22 mm (0.87 in)) shows the specification of the 10K 150A RF aluminium flange JIS B2220. -
Page 41: Materials
Proservo NMS81 Materials Material of housing Feature Option Housing descriptions Transmitter Alu, coated, process 316/316L Transmitter Alu coated, process 316/316L internal FEP coated Transmitter + process 316/316L Transmitter 316/316L, process 316/316L internal FEP coated Materials of measuring wire Feature Option Wire descriptions 16 m (53.33 ft);... -
Page 42: Operability
Proservo NMS81 Operability Operating concept Operator-oriented menu structure for user-specific tasks • Commissioning • Operation • Diagnostics • Expert level Operating languages • English • German • Japanese Feature 500 of the product structure determines which of these languages is preset on delivery. -
Page 43: Remote Operation
Ethernet Computer with operating tool (e.g. FieldCare) Operation via service interface A0026993 18 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... -
Page 44: Certificates And Approvals
The measuring system meets the legal requirements of the applicable EC guidelines. These are listed in the corresponding EC Declaration of Conformity together with the standards applied. Endress+Hauser confirms successful testing of the device by affixing to it the CE mark. RCM-Tick marking... -
Page 45: Crn Approval
Proservo NMS81 CRN approval The devices have a CRN approval for the following options of the ordering features 010 ("Approval") and 140 ("Process Connection"): Condition 1: Approval 010: Approval Meaning CSA C/US General Purpose CSA C/US Cl.I Div.1 Gr.A-D, Ex d[ia] IIC T6 FM C/US XP-AIS Cl.I Div.1 Gr.BCD T6, AEx db [ia Ga] IIC T6 Ga/Gb... -
Page 46: Other Standards And Guidelines
Proservo NMS81 Other standards and Industry standards guidelines • Directive 2002/95/EC: "Restriction of Hazardous Substances Directive" (RoHS) • Directive 2004/22/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 oilfield equipment"... -
Page 47: Ordering Information
• 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 Marking Option of ordering feature 895 Meaning "Marking"... -
Page 48: Application Packages
Proservo NMS81 Application packages Advanced tank measurement The device software provides the following tank measurement methods: methods • Direct level measurement → 48 • Hybrid tank measurement system (HTMS) → 49 • Hydrostatic tank shell correction (HyTD) → 50 •... - Page 49 Proservo NMS81 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 Measured variables Calculated variables HTMS + P1 •...
- Page 50 Proservo NMS81 Hydrostatic tank shell correction (HyTD) 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 the liquid stored in the tank.
-
Page 51: Accessories
Proservo NMS81 Accessories Device-specific accessories Weather protection cover 471.6 (18.6) A0033572 20 Weather protection cover; dimensions: mm (in) Materials Part Material Protection cover and mounting brackets 316L (1.4404) Screws and washers • The weather protection cover can be ordered together with the device: Ordering feature 620 "Accessory Enclosed", option PA "Weather Protection Cover") - Page 52 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.
- Page 53 Proservo NMS81 A0029103 23 Mounting position of relief valve and pressure gauge Pressure gauge Relief valve 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 a nitrogen blanket for petrochemical or chemical applications.
-
Page 54: Communication-Specific Accessories
For details refer to Technical Information TI00404F Accessory Description Commubox FXA291 Connects Endress+Hauser field devices with CDI interface (= Endress+Hauser Common Data Interface) to the USB interface of a computer. For details refer to Technical Information TI00405C Accessory... -
Page 55: Documentation
Proservo NMS81 Documentation Technical Information (TI) The Technical Information contains all the technical data on the device and provides an overview of the accessories and other products that can be ordered for the device. Device Technical Information Proservo NMS81 TI01249G... -
Page 56: Safety Instructions (Xa)
Proservo NMS81 Safety instructions (XA) Ordering feature 010 "Approval" Meaning ATEX II 1/2G Ex db [ia Ga] IIC T6Ga/Gb XA01495G FM C/US XP-AIS Cl.I Div.1 Gr.BCD T6 XA01496G AEx db [ia Ga] IIC T6 Ga/Gb EAC Ex-R 0 Ex d[ia] IIC T1...T6... -
Page 57: Registered Trademarks
Proservo NMS81 Registered trademarks FieldCare ® Registered trademark of the Endress+Hauser Process Solutions AG, Reinach, Switzerland MODBUS ® Registered trademark of the MODBUS-IDA, Hopkinton, MA, USA Endress+Hauser... - Page 60 *71318275* 71318275 www.addresses.endress.com...