Endress+Hauser NXA820 Operating Manual

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BA00426G/00/EN/17.18 71424924

Valid as of software version:

02.02.00

Products Solutions Services

Operating Instructions

Tankvision Tank Scanner NXA820, Data Concentrator NXA821, Host Link NXA822

System Description

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Tankvision

Order code:

Ext. ord. cd.:

Ser. no.:

www.endress.com/deviceviewer

Endress+Hauser Operations App

XXXXXXXXXXXX

XXXXX-XXXXXX

XXX.XXXX.XX

Serial number

Make sure the document is stored in a safe place such that it is always available when working on or with the device. To avoid danger to individuals or the facility, read the "Basic safety instructions" section carefully, as well as all other safety instructions in the document that are specific to working procedures. The manufacturer reserves the right to modify technical data without prior notice. Your Endress+Hauser distributor will supply you with current information and updates to these Instructions.

A0023555

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Tankvision

Table of Contents

1 Document information . . . . . . . . . . . . . . 4

1.1 Version history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.2 Document function . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.3 Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.4 Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.5 Registered trademarks . . . . . . . . . . . . . . . . . . . . . . . 6

2 Basic safety instructions . . . . . . . . . . . . . 7

2.1 Requirements for the personnel . . . . . . . . . . . . . . . 7

2.2 Designated use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.3 Workplace safety . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.4 Operational safety . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.5 Product safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.6 IT security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3 Application . . . . . . . . . . . . . . . . . . . . . . . . 9

3.1 Inventory control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.2 Application areas . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4 Identifying the components . . . . . . . . .10

4.1 Nameplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4.2 Tank Scanner NXA820 . . . . . . . . . . . . . . . . . . . . . 11

4.3 Data Concentrator NXA821 . . . . . . . . . . . . . . . . . 12

4.4 Host Link NXA822 . . . . . . . . . . . . . . . . . . . . . . . . 14

4.5 Explosion picture . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.6 Tankvision OPC Server . . . . . . . . . . . . . . . . . . . . . 16

4.7 Tankvision Printer Agent . . . . . . . . . . . . . . . . . . . 16

4.8 Tankvision Alarm Agent . . . . . . . . . . . . . . . . . . . 17

8.7 JIS calculation flow charts . . . . . . . . . . . . . . . . . . . 63

8.8 Annex A.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

8.9 Annex A.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

8.10 Annex A.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

8.11 Annex A.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

8.12 Annex A.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

8.13 Annex A.6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

8.14 Annex A.7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

8.15 Annex A.8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

8.16 Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

5 PC recommendations. . . . . . . . . . . . . . . 18

5.1 PC connection for viewing data . . . . . . . . . . . . . . 18

5.2 Recommendations when using OPC Server,

Printer Agent or Alarm Agent . . . . . . . . . . . . . . . 18

5.3 Alternations from the recommendations . . . . . 18

6 Connections to gauges and host systems

6.1 Field instruments and slave devices . . . . . . . . . . 19

6.2 Host Systems communication . . . . . . . . . . . . . . . 24

7 Examples . . . . . . . . . . . . . . . . . . . . . . . . .25

7.1 System architecture . . . . . . . . . . . . . . . . . . . . . . . 25

7.2 Screen examples in Browser . . . . . . . . . . . . . . . . 26

8 Calculations. . . . . . . . . . . . . . . . . . . . . . . 28

8.1 API Flow Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

8.2 GBT calculation flow chart . . . . . . . . . . . . . . . . . . 42

8.3 Mass Measurement . . . . . . . . . . . . . . . . . . . . . . . 48

8.4 Calculations for liquefied gases . . . . . . . . . . . . . . 53

8.5 CTSh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

8.6 Alcohol calculations . . . . . . . . . . . . . . . . . . . . . . . 61

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Document information Tankvision

DANGER

WARNING

CAUTION

NOTICE

1 Document information

1.1 Version history

Document version Valid for SW version Changes to the previous version

BA00426G/00/EN/01.12 01.02.02-00xxx/01.04.00 Initial version

BA00426G/00/EN/13.13 01.05.00 Initial version

BA00426G/00/EN/14.15 01.06.00 Java applets replacement, new layout

BA00426G/00/EN/15.17 02.00.00 Introduced Temperature and Density Profile

BA00426G/00/EN/16.17 02.01.00 Introduced Floating Roof Weight Correction,

BA00426G/00/EN/17.18 02.02.00 Introduced Switch by Gauge redundancy mode

1.2 Document function

Redundancy functionality with NXA820 Interface Only, CH alarm for Volume or Mass

for NXA820 Interface Only

This manual is giving detailed information on the system capabilities and architecture. It supports project and sales engineers in designing the system architecture during acquisition and execution phase. Furthermore during operation time of the system all servicing personnel in need of detailed knowledge about the system capabilities.

This manual is not suitable for the Interface only version of NXA820.

1.3 Symbols

1.3.1 Safety symbols

Symbol Meaning

DANGER!

A0011189-EN

A0011190-EN

A0011191-EN

A0011192-EN

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.

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Tankvision Document information

)

1.3.2 Electrical symbols

Symbol Meaning

Direct current

A terminal to which DC voltage is applied or through which direct current flows.

A0011197

Alternating current

A terminal to which alternating voltage is applied or through which alternating current flows.

A0011198

Ground connection

A grounded terminal which, as far as the operator is concerned, is grounded via a grounding

A0011200

system.

Protective ground connection

A terminal which must be connected to ground prior to establishing any other connections.

A0011199

1.3.3 Symbols for certain types of information

Symbol Meaning

Tip

Indicates additional information.

A0011193

Reference to page

Refers to the corresponding page number.

A0011195

, , ... Series of steps

Result of a sequence of actions

A0018373

1.3.4 Symbols in graphics

Symbol Meaning

1, 2, 3 ... Item numbers

, , ... Series of steps

A, B, C ... Views

Hazardous area

Indicates a hazardous area.

A0011187

Indicates a non-hazardous location

Safe area (non-hazardous area)

A0011188

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Document information Tankvision

1.4 Documentation

1.4.1 Operating instructions

Document number Instrument Type of Document

BA00339G/00

BA00340G/00 Installation Instructions

BA00424G/00 System Description

BA00426G/00 Operator Manual

BA01137G/00 Tankvision NXA820 OPC Server User Manual

• Tank Scanner NXA820

• Data Concentrator NXA821

• Host Link NXA822

Description of Instrument Functions

1.5 Registered trademarks

Microsoft®, Windows® and Internet Explorer Registered trademarks of the Microsoft Corporation

Modbus

Modbus is a registered trademark of Schneider Electric USA, Inc.

Java Registered trademark of Oracle® Corporation

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Tankvision Basic safety instructions

2 Basic safety instructions

2.1 Requirements for the personnel

The personnel for installation, commissioning, diagnostics and maintenance must fulfill the following requirements:

• Trained, qualified specialists: must have a relevant qualification for this specific function and task

• Are authorized by the plant owner/operator

• Are familiar with federal/national regulations

• Before beginning work, the specialist staff must have read and understood the instructions in the Operating Instructions and supplementary documentation as well as in the certificates (depending on the application)

• Following instructions and basic conditions

The operating personnel must fulfill the following requirements:

• Being instructed and authorized according to the requirements of the task by the facility's owner operator

• Following the instructions in these Operating Instructions

2.2 Designated use

2.2.1 Application

Tankvision is a dedicated tank inventory management system. Components:

• Tankvision Tank Scanner NXA820 scans parameters from tank gauges and performs tank calculations

• Tankvision Data Concentrator NXA821 summarizes data from various Tank Scanners NXA820

• Tankvision Host Link NXA822 provides data to host systems (such as PLC or DCS) via Modbus

The above mentioned components are operated via a standard web browser. It does not require any proprietary software. Tankvision is based on a distributed architecture on a Local Area Network (LAN). Due to its modular structure it can be adjusted to any application. It is ideally suited for small tank farms with only a couple of tanks, but also for large refineries with hundreds of tanks.

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Basic safety instructions Tankvision

2.3 Workplace safety

For work on and with the device:

• Wear the required personal protective equipment according to federal/national regulations.

• Switch off the supply voltage before connecting the device.

2.4 Operational safety

Risk of injury!

• Operate the device in proper technical condition and fail-safe condition only.

• The operator is responsible for interference-free operation of the device.

Conversions to the device

Unauthorized modifications to the device are not permitted and can lead to unforeseeable dangers

• If, despite this, modifications are required, consult with Endress+Hauser.

Repair

To ensure continued operational safety and reliability,

• Carry out repairs on the device only if they are expressly permitted.

• Observe federal/national regulations pertaining to repair of an electrical device.

• Use original spare parts and accessories from Endress+Hauser only.

2.5 Product safety

The device is designed to meet state-of-the-art safety requirements, has been tested and left the factory in a condition in which it is safe to operate. The device complies with the applicable standards and regulations as listed in the EC declaration of conformity and thus complies with the statutory requirements of the EG directives. Endress+Hauser confirms the successful testing of the device by affixing to it the CE mark.

2.6 IT security

We only provide a warranty if the device is installed and used as described in the Operating Instructions. The device is equipped with security mechanisms to protect it against any inadvertent changes to the device settings.

IT security measures in line with operators' security standards and designed to provide additional protection for the device and device data transfer must be implemented by the operators themselves.

Endress+Hauser can be contacted to provide support in performing this task.

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Tankvision Application

3Application

3.1 Inventory control

By using Tankvision to monitor the tank level and stored volume of valuable liquids remotely, owners or operators of tank farms or terminals for petroleum products and chemicals (liquids) can visualize the volumes or mass of the stored medium in real time. The data can be used to plan the inventory and distribution. The data can also be used to manage tank farm operations like pumping or transferring products. Tankvision has its unique concept using network technology. Without using proprietary software, the users can visualize and manage their valuable liquids stored in the tanks by a web browser. Tankvision is a flexible and cost effective solution due to its scalable architecture. The application coverage goes from small depots with only a few tanks up to refineries.

3.2 Application areas

• Tank farms in refineries

• Ship loading terminals

• Marketing and distribution terminals

• Pipeline terminals

• Logistic terminals for tanks storing products like crude oils, refined white and black products, chemicals, LPGs, fuels, biofuels, alcohols

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Identifying the components Tankvision

4 Identifying the components

4.1 Nameplate

1 Address of manufacturer 2Device name 3Order code 4 Serial number (Ser. no.) 5Data Matrix Code 6 Degree of protection 7 Certificate and approval relevant data 8 Technical data of the Service LAN port 9Barcode 10 CE mark 11 MAC address of the System LAN port and Sync LAN port 12 Admissible ambient temperature 13 Type of fieldbus communication (only for Tank Scanner NXA820) 14 Supply voltage

nameplate_2

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Tankvision Identifying the components

4.2 Tank Scanner NXA820

• The Tank Scanner NXA820 connects multiple tank gauges: from up to 15 tanks via one field-loop. The Tank Scanner NXA820 supports different field protocols (Modbus EIA485, Sakura V1, Whessoe WM550).

• The measured values are transmitted by the network and visualized on HTML pages.

• The Tank Scanner NXA820 can be used stand-alone for small tank farms, but also be integrated into a large system for use in refineries.

• The Tank Scanner NXA820 is equipped with a full set of tank inventory calculations. The calculations are based on various international standards such as API, ASTM, IP and many others. Measured values are used to calculate volume and mass.

4.2.1 Ordering information

Detailed ordering information is available from the following sources:

• In the Product Configuration on the Endress+Hauser website: www.endress.com → Select country → Instruments → Select device → Product page function: Configure this product

• From your Endress+Hauser Sales Center: www.endress.com/worldwide

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 as measuring 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

4.2.2 Product picture

L00-NXA8xxxx-10-08-06-xx-002

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Identifying the components Tankvision

4.3 Data Concentrator NXA821

• The NXA821 Tankvision Data Concentrator is the enhanced solution for large tank farms and refineries. The Data Concentrator is required if: The plant contains more than one field loop (each of which has its own Tank Scanner NXA820) and tanks of more than one Tank Scanner NXA820 are to be grouped

• The Data Concentrator collects the data of several Tank Scanner units and enables reconciliation and totalization of the tank data of many or all tanks in structured groups.

• Alarms and events from all connected Tank Scanners NXA820 can be shown in a common screen. Any tank of the system can be assigned to any tank group, regardless of the Tank Scanner it is linked to. This ensures the highest possible flexibility for the plant or tank farm.

• An alarm pop-up shows alarms of all connected Tank Scanners NXA820 even if the web browser is closed.

• Direct serial printer connection for report printing (W+M certified acc. PTB)

• 90 tanks (more on request) can be allocated to each Data Concentrator NXA821. Each of these tanks must have been allocated to a Tank Scanner NXA820 beforehand.

• Tanks from up to 6 different Tank Scanners NXA820 (more on request) can be integrated in this way.

4.3.1 Ordering information

Detailed ordering information is available from the following sources:

• In the Product Configuration on the Endress+Hauser website: www.endress.com → Select country → Instruments → Select device → Product page function: Configure this product

• From your Endress+Hauser Sales Center: www.endress.com/worldwide

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 as measuring 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

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Tankvision Identifying the components

4.3.2 Product picture

L00-NXA8xxxx-10-08-06-xx-003

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Identifying the components Tankvision

4.4 Host Link NXA822

• The Host Link NXA822 collects data from all Tank Scanners NXA820 on a network and transfers them to the host system.

• The MODBUS option supports serial EIA-232(RS) and EIA-485(RS) or MODBUS TCP/IP. The NXA822 is configured as a MODBUS slave. Supported functions are: – Coil Status (#01) – Read Input Status(#02) – Holding Registers (#03) – Input Registers (#04) – Force Single Coil (#05) – Write Modbus Values (#06) – Force Multiple Coils (#15) – Preset Multiple Registers (#16)

• The MODBUS register map is described via XML files and can easily be adapted to individual MODBUS master requirements.

• Gauge commands for Servo Gauges

• 90 tanks (more on request) can be allocated to each Host Link NXA822. Each of these tanks must have been allocated to a Tank Scanner NXA820 beforehand.

• Tanks from up to 6 different Tank Scanners NXA820 (more on request) can be integrated in this way.

• Per system 2 NXA822 units can be installed.

4.4.1 Ordering information

Detailed ordering information is available from the following sources:

• In the Product Configuration on the Endress+Hauser website: www.endress.com → Select country → Instruments → Select device → Product page function: Configure this product

• From your Endress+Hauser Sales Center: www.endress.com/worldwide

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 as measuring 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

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Tankvision Identifying the components

4.4.2 Product picture

L00-NXA8xxxx-10-08-06-xx-004

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Identifying the components Tankvision

4.5 Explosion picture

L00-NXA82xxx-16-00-00-xx-071

1Cover plate 2 Inner electronics 3Housing

4.6 Tankvision OPC Server

• The OPC Server is a Windows program installed on a PC connecting to NXA820 and allows access to measured and calculated tank parameters.

• The OPC Server connects to OPC clients on the same PC or other PCs via LAN.

• The OPC Server supports browsing tanks and tank parameters on NXA820.

• The OPC Server is included in each NXA820 and can be uploaded to the PC.

• The OPC Server is based on OPC DA V3.0

4.7 Tankvision Printer Agent

• The Printer Agent is a Windows program installed on a PC, connecting to NXA820/ NXA821. Supports up to 2 network connection per PC.

• The program is running in the background and enables (scheduled) printing reports on connected printers.

• Up to 3 printers (directly connected to the PC or network printers) can be assigned to the Printer Agent.

• If a printout can not be performed, a record is kept within the Printer Agent.

• The printer agent software is included in each NXA820 and can be uploaded to the PC (for more information, see document BA00339G).

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Tankvision Identifying the components

4.8 Tankvision Alarm Agent

• The Alarm Pop-Up-Agent is a Windows program installed on a PC, connecting to NXA820/NXA821.

• The program is running in the background and scans for alarms generated in NXA820/ NXA821.

• If an alarm is present, a pop-up window opens displaying the alarm.

• The alarm can be acknowledged within this window.

• The window can only be closed if no alarm is active.

• The Alarm Agent can be uploaded from NXA820/821 to the PC.

• A single alarm Agent can support multiple NXA820/NXA821.

For more information, see document BA00339G.

Alarm-Popup-Agent

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PC recommendations Tankvision

5PC recommendations

5.1 PC connection for viewing data

Tankvision Tank Scanner NXA820, Tankvision Data Concentrator NXA821 and Tankvision Host Link NXA822 are providing a web server to view and enter data or perform configurations. Viewing the pages requires a web browser and JAVA runtime installed on a PC. PC and the Tankvision components must be connected within the same Local Area Network (LAN) consisting out of Ethernet lines, switches and/or routers.

HUBs shall not be used. In secured systems e.g. for W&M purposes, routers cannot be used. If company policies allow a remote connection into the LAN also enables a remote connection to Tankvision components.

5.1.1 Recommendations PC configuration

With all on the market available web browser entering the Tankvision web server is possible. Nevertheless the pages are optimized for Microsoft Internet Explorer (supported version IE9, IE10 and IE11 – Compatibility Mode). The user interface pages are optimized for a screen resolution of 1280x1024 (or higher).

5.2 Recommendations when using OPC Server, Printer Agent or Alarm Agent

• Windows XP 32 Bit Service Pack 3, Windows 7 32 Bit or Windows 7 64 Bit

• Java 8 or higher

5.3 Alternations from the recommendations

Alternations to the recommendations in the previous chapters might have influences on the proper behaviour of the system especially when communication ports are used by other programs (e.g. other OPC servers). In case of uncertainty consult Endress+Hauser.

Included Software and Operating System requirements Windows 7

(32/64 bit)

OPC Server X X

Alarm Agent X –

Printer Agent X –

Tankvision Installation and Recovery Tool X –

Windows Server 2008

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Tankvision Connections to gauges and host systems

6 Connections to gauges and host systems

6.1 Field instruments and slave devices

Please take care that the signal and power cables always are separated to prevent noise and electrical interference between them.

6.1.1 Communication variants

Field instruments or other slave devices are connected to the Tankvision Tank Scanner NXA820. The unit is available in 3 communication versions.

• Modbus RTU RS485 According to "Modbus over serial line specification and implementation guide V1.02" published by the Modbus-IDA organization (www.modbus.org) and based upon the EIA/ TIA-485-A physical layer specification.

Characteristic impedance 135 to 165 Ω at measuring frequency of 3 to 20 MHz

Cable capacitance ≤ 30 pF/m

Core cross-section ≥ 0.34 mm² (AWG 22) multi-strand cable is preferred

Cable type Single twisted pair + third conductor (for common) or

Cable resistance ≤ 110 Ω /km

Signal damping Max. 9 dB over the entire length of the cable cross-section

Shielding Copper braided shielding or combined foil and braided shielding

Dual twisted pair (common uses second pair with wire joined together)

• Sakura V1 V1 fieldbus is a voltage mode digital communication using up to ±30 VDC.

Cable capacitance ≤ 50 nF/m

Core cross-section ≥ 0.9 mm² (AWG 17) multi-strand cable is preferred

Cable type Twisted pair

Cable resistance ≤ 30 Ω /km

Shielding Copper braided shielding or combined foil and braided shielding

Insulation ≥ 60 V

• Whessoe WM550 The WM550 communication protocol works using a current loop principle. Connection Please take into consideration that the principle of current loop connection works as follows: The Tankvision (master) (-) signal point connects to slave 1 (+) signal point. Slave 1 (-) signal point connects to slave 2 (+) signal point until (the last) slave N (-) signal point connects back to the Tankvision (master) (+) signal point closing the current loop.

Cable specification Please ensure to follow the following recommendations for field installation of the Tankvision with the WM550 protocol variant. – Cable with twisted and non-shielded pairs – Cable with at least 0.5 mm² (AWG 20) section – Maximum total cable resistance: 250 Ω – Cable with low capacitance

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Connections to gauges and host systems Tankvision

Cross section (mm² (AWG)) Resistance (Ω/km) Capacitance (nF/km)

Cable 1 0.5 (20) 39.2 60

Cable 2 0.75 (18) 24.6 65

Cable 3 1.3 (16) 14.2 75

6.1.2 Field devices

The following list gives an overview on possible field instruments which can be connected directly or via system components. Nevertheless the connection possibilities are not limited to these devices.

• Micropilot NMR8x Micropilot NMR81 is used for custody transfer and inventory control applications with NMi- and PTB-approvals and meets the requirements according to OIML R85 and API

3.1B. NMR81 is particularly suited for free space applications up to 70 m. The drip-off lens antenna with 79 GHz transmitting frequency produces a sharply focused beam angle of 3° and avoids obstacles even close to tank wall. Micropilot NMR81 is available with Modbus RS485 and Sakura V1 output. For more information see TI01252G/00/EN. Micropilot NMR84 is used for custody transfer and inventory control applications with NMi- and PTB-approvals. It meets the relevant requirements according to OIML R85 and API 3.1B. The NMR84 free space radar with drip-off planar antenna is specifically suited for stilling well applications. The superior drip-off antenna design with proven track record eliminates problems caused by condensation. Micropilot NMR84 is available with Modbus RS485 and Sakura V1 output. For more information see TI01253G/00/EN.

• Proservo NMS8x The intelligent tank gauge Proservo NMS80 is designed for high accuracy liquid level measurement in custody transfer and inventory control applications with NMi- and PTBapprovals. It meets the relevant requirements according to OIML R85 and API 3.1B. It fulfills the exact demands of tank inventory management and loss control and is optimized in regards of total cost saving and safe operation. Proservo NMS8x is available with Modbus RS485 and Sakura V1 output. For more information see TI01248G/00/EN, TI01249G/00/EN or TI01250G/00/EN.

• Tank Side Monitor NRF8x The Tank Side Monitor NRF81 is a sensor integration and monitoring unit for bulk storage tank gauging applications. It integrates various level, temperature and pressure tank sensor data into a control host system. Various selectable alarms and outputs. Tank Side Monitor NRF8x is available with Modbus RS485 and Sakura V1 output. For more information see TI01251G/00/EN.

• Proservo NMS5/7 The Proservo NMS5/7 intelligent tank gauges are designed for high accuracy liquid level measurement in storage and process applications. Tank mounted intelligence makes the Proservo NMS5 ideal for single or multi-task installation, converting a wide of measurement functions including beside others: –Liquid level –Interface level – Spot density – Density profile Proservo NMS5/7 is beside others available with Modbus RTU RS485, Sakura V1, Whessoe WM550 output. For more information see TI00452G/08/EN.

• Tank Side Monitor NRF590

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Tankvision Connections to gauges and host systems

The Tank Side Monitor NRF590 is a sensor integration and monitoring unit for bulk storage tank gauging applications. It can be used with Micropilot radar or Proservo level gauges and can be combined with other HART compatible devices. Connects up to 6 HART devices via intrinsic safe 2 wire, for example Prothermo for average temperature measurement and Cerabar/Deltabar for HTMS density applications. Various industry standard communication protocols, including –Sakura V1 – EIA-485 Modbus – Whessoe WM550 For more information see TI00402F/00/EN.

• Micropilot S FMR53x/FMR540 The Micropilot S is used for highly accurate level measurement in storage tanks and can be applied in custody transfer applications. It meets the relevant requirements according to OIML R85 and API 3.1B. The Micropilot S is communicating via the industry standard protocoll HART (Standard 5) and can be connected to the Tankvision Tank Scanner via the Tank Side Monitor. For more information see TI00344F/00/EN and TI00412F/00/EN.

• Prothermo NMT539 The Prothermo NMT539 is based on API (American Petroleum Institute) Manual of Petroleum Measurement Standard, Chapter 7, and enables high accuracy temperature measurement. At the same time, it is an intelligent average temperature sensor for tank gauging with an optional WB capacitance sensor at the bottom of the temperature probe. For average temperature measurement, it consists of precision multi-spot Pt100 elements. The NMT539 is a highly capable solution that provides both contant average temperature data and water interface data via local HART® communication. For accurate inventory measurement, it is best suited connected to Endress+Hauser’s Proservo NMS, Micropilot NMR or Tank Side Monitor NRF with level tankg gauge (e.g. Micropilot). For more information see TI00042G/08/EN.

• Prothero NMT532 The Prothermo NMT532 consists of an intelligent local HART® signal converter and average temperature sensor. For average temperature measurement, it consists of precision multi-spot Pt100 (max. 6) elements which have fixed interval (2 m (6.6 ft) or 3 m (9.8 ft)). The NMT532 is a highly capable solution for a variety of tank gauging applications and provides constant average temperature data via local HART® communication. For accurate inventory measurement, it is best suited connected to Endress+Hauser’s Proservo NMS, Micropilot NMR or Tank Side Monitor NRF with level tank gauge (e.g. Micropilot). For more information see TI00049G/08/EN.

• Micropilot M FMR2xx The Micropilot M is used for continuous, non-contact level measurement of liquids, pastes, slurries and solids. The measurement is not affected by changing media, temperature changes. – The FMR230 is especially suited for measurement in buffer and process tanks. – The FMR231 has its strengths wherever high chemical compatibility is required. – The FMR240 with the small 40 mm (1½") horn antenna is ideally suited for small

vessels. Additionally, it provides an accuracy of ±3 mm (0.12 in).

– The FMR244 combines the advantages of the horn antenna with high chemical

resistance.

The 80 mm (3") horn antenna is used additionally in solids. – The FMR245 - highly resistance up to 200 °C (392 °F) and easy to clean. The Micropilot M is communicating via the industry standard protocol HART and can be connected to the Tankvision Tank Scanner via the Tank Side Monitor or an HART to Modbus converter e.g. by Moore Industries. For more information see TI000345F/00/EN.

• Levelflex M FMP4x

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Connections to gauges and host systems Tankvision

Level Measurement - Continuous level measurement of powdery to granular bulk solids e.g. plastic granulate and liquids. – Measurement independent of density or bulk weight, conductivity, dielectric constant,

temperature and dust e.g. during pneumatic filling. – Measurement is also possible in the event of foam or if the surface is very turbulent. Interface measurement Continuous measurement of interfaces between two liquids with very different dielectric constants, such as in the case of oil and water for example. The Levelflex M is communicating via the industry standard protocol HART and can be connected to the Tankvision Tank Scanner via the Tank Side Monitor or an HART to Modbus converter e.g. by Moore Industries. For more information see TI00358F/00/EN.

• Levelflex FMP5x –FMP51

Premium device for level and interface measurement in liquids.

–FMP52

Premium device with coated probe for the use in aggressive liquids. Material of wetted parts FDA listed and USP Class VI compliant.

–FMP54

Premium device for high-temperature and high-pressure applications, mainly in liquids. Levelflex is communicating via the industry standard protocol HART and can be connected to the Tankvision Tank Scanner via the Tank Side Monitor or an HART to Modbus converter e.g. by Moore Industries. For more information see TI01001F/00/EN.

•Cerabar M The Cerabar M pressure transmitter is used for the following measuring tasks: – Absolute pressure and gauge pressure in gases, steams or liquids in all areas of process

engineering and process measurement technology. – High reference accuracy: up to ±0.15%, as PLATINUM version: ±0.075% Cerabar M is communicating via the industry standard protocol HART and can be connected to the Tankvision Tank Scanner via the Tank Side Monitor or Proservo. For more information see TI000436P/00/EN.

•Cerabar S The Cerabar S pressure transmitter is used for the following measuring tasks: – Absolute pressure and gauge pressure in gases, steams or liquids in all areas of process

engineering and process measurement technology. – High reference accuracy: up to ±0.075%, as PLATINUM version: ±0.05% Cerabar S is communicating via the industry standard protocol HART and can be connected to the Tankvision Tank Scanner via the Tank Side Monitor or Proservo. For more information see TI000383P/00/EN.

•Deltabar M The Deltabar M differential pressure transmitter is used for the following measuring tasks: – Flow measurement (volume or mass flow) in conjunction with primary elements in

gases, vapors and liquids – Level, volume or mass measurement in liquids – Differential pressure monitoring, e.g. of filters and pumps – High reference accuracy: up to ±0.1%, as PLATINUM version: ±0.075% Deltabar M is communicating via the industry standard protocol HART and can be connected to the Tankvision Tank Scanner via the Tank Side Monitor or Proservo. For more information see TI000434P/00/EN.

•Deltabar S The Deltabar S differential pressure transmitter is used for the following measuring tasks: – Flow measurement (volume or mass flow) in conjunction with primary devices in gases,

vapors and liquids – Level, volume or mass measurement in liquids – Differential pressure monitoring, e.g. of filters and pumps

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Tankvision Connections to gauges and host systems

– High reference accuracy: up to ±0.075%, as PLATINUM version: ±0.05% Deltabar S is communicating via the industry standard protocol HART and can be connected to the Tankvision Tank Scanner via the Tank Side Monitor or an HART to Modbus converter e.g. by Moore Industries. For more information see TI000382P/00/EN.

•Liquicap M The Liquicap M FMI5x compact transmitter is used for the continuous level measurement of liquids. – Suitable for interface measurement Liquicap M is communicating via the industry standard protocol HART and can be connected to the Tankvision Tank Scanner via the Tank Side Monitor or an HART to Modbus converter e.g. by Moore Industries. For more information see TI00401F/00/EN.

• Whessoe ITGs

• Sakura Endress Float&Tape Transmitter TMD

• Sakura Endress TGM5000

• Sakura Endress TGM4000

• SWG70: Wireless HART gateway

• Modbus slave devices As Modbus is an open protocol there are various system components available which can be connected to Tankvision Tank Scanner. To do so the so called gauge definition file and the Modbus map file need to be adapted to the needs. This is a standard procedure and described in BA00339G/00/EN. Examples for such devices are HART to Modbus converters, PLCs or other protocol converters e.g. Gauge Emulator by MHT.

Remote service access via the Endress+Hauser device configuration tool FieldCare is supported for the following device combination:

• Tankvision Tank Scanner with Modbus or Sakura V1 communication

• Tank Side Monitor Modbus or Sakura V1 communication and SW version 02.04.00 or later

• HART devices connected to Tank Side Monitor intrinsic safe HART bus and supporting FDT/DTM or

• Tankvision Tank Scanner with Modbus or Sakura V1 communication

• Proservo NMS5/7 (Modbus or Sakura V1 communication) with – TCB-6 version 4.27E – Graphical display operation module – Modbus communication module COM-5, version 2.0 or – V1 communication module COM-1 (SRAM-mounted), version 5.01 – HART devices connected to Proservo cannot be reached by FieldCare

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Connections to gauges and host systems Tankvision

6.2 Host Systems communication

To transfer and receive data to/from host system the communication variants OPC DA (version 3.0) and Modbus RS232, Modbus RS485 and Modbus TCP are available.

6.2.1 OPC DA server

See "Tankvision OPC Server", → ä 16. For available parameters see A.1 Parameter list.

6.2.2 Modbus slave via Host Link NXA822

See "Host Link NXA822", → ä 14. For available parameters see A.1 Parameter list.

6.2.3 Connection to Tankvision Professional

To connect to Tankvision Professional a dedicated communication is available. In this case measured data are transferred as the calculations are performed in Tankvision Professional.

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Tankvision Examples

NXA820 Tank Scanner

NXA820

Tank Scanner

Switch

NXA820 Tank Scanner

NXA821

Data Concentrator

NXA820

NXA822

Host Link

NXA820 NXA820 NXA820

Ethernet

DCS

OPC Server FieldCareSeveral Printer

for W+M reports

Printer

Browser

DCS

Modbus RTU RS232/485, Modbus TCP

Fieldbus protocol

Operator 1

Operator 2

Operator 3

Fieldbus protocol (e.g. Modbus, V1, WM550)

7Examples

7.1 System architecture

L00-NXA82xxx-02-00-00-en-006

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Examples Tankvision

7.2 Screen examples in Browser

Tank tabular view

Tank details

Tabular view

NXA82x_Tank_General-Details-Tab

26 Endress+Hauser

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Tankvision Examples

Trend view

Trend

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Calculations Tankvision

Level

Flow

S&WV

FWL

Base Temp.

Ambient temp.

Air density

air density

Product temp.

Hydrom. corr.

Product Code

S&W

Table & Product

Code

Obs. density &

Obs. temp.

Ref. density

FWV

CTSh

Sump/Heel

volume

RemCap AvailVol

TOV

GOV

VCF

WAC

Ref. Density

CSW

GSV

NSV

NSW in air

Liquid Mass/

NSW in VacuumAir

If Ullage

NoGo Zones

convert to

Innage

calculate

FWV

Floating

API/ASTM

Obs-Ref

density

conversion

S&W

calculation

Roof

Air corr.

calc.

corrections

Calculate

Remain cap.

Calculate

AvailVol

Calculate

TOV

Calculate

EquivArea

Calculate

EquivArea

TankTop

P-TCT

W-TCT

Tank Shell

details

Roof

Details

Ullage Conversion

Volume calculation

Free Water Volume

calculation

Tank Shell correction

Floating Roof

corrections

Volume Correction

Factor calculation

Sediment & Water

calculations

12.

Flow calculation

Sump/Heel Volume

11.

Net Standard Weight

calculation

Reference Density

Calculation

10.

Net weight in Air

Calculation

8Calculations

Tankvision Tank Scanner can perform various kinds of calculations which are described in the following chapters. The inventory calculations allow the conversion from measured data like level and temperature to standard data (e.g. Net standard volume or mass). There are various standards for these calculations available differing in the sequence of the calculation or the way compensation factors are determined (from tables or formula). Today calculations from API (see Text → ä 29) and GB/T (see Text → ä 29) are implemented in Tankvision Tank Scanner.

8.1 API Flow Charts

The chart shows the sequence calculations are done according to the API. The different steps are explained in the following chapters.

L00-NXA82xxx-16-00-00-xx-034

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Tankvision Calculations

API (American Petroleum Institute)

The American Petroleum Institute, commonly referred to as API, is the largest U.S trade association for the oil and natural gas industry. It claims to represent about 400 corporations involved in production, refinement, distribution and many other aspects of the petroleum industry. The association’s chief functions on behalf of the industry include advocacy and negotiation with governmental, legal and regulatory agencies; research into economic, toxicological and environmental effects; establishment and certification of industry standards; and education outreach. API both funds and conducts research related to many aspects of the petroleum industry.

GB (Chinese national standards)

GB standards are the Chinese national standards issued by the Standardization Administration of China (SAC), the Chinese National Committee of the ISO and IEC. GB stand for Guobiao, Chinese for national standard. Mandatory standards are prefixed "GB". Recommended standards are prefixed "GB/T". A standard number follows "GB" or "GB/T".

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Calculations Tankvision

Level

RemCap AvailVol

TOV

If Ullage

convert to

Innage

Calculate

Remain. cap.

Calculate

AvailVol

Calculate

TOV

TankTop

P-TCT

Ullage Conversion

TOV calculation

FWLFWV

TOV

calculate

FWV

W-TCT

Free Water Volume

calculation

8.1.1 Total Observed Volume - TOV

L00-NXA82xxx-16-00-00-xx-035

The Total Observed Volume (TOV) is determined with the level information and the Tank Capacity Table (TCT). The TOV is the volume observed at the present (temperature) conditions. The TCT is a tank specific table created by calibration holding the level to volume transfer information. To differentiate the TCT for the Product and for the Water the TCT gets marked with a P (P-TCT). The level information needed for this step is in innage which is the normal way the level is transferred from the gauge. In case the gauge inputs ullage to the system a calculation into innage is necessary beforehand (Ullage substracted from Mounting position).

Two more information can be derived from TCT and level:

• Remaining Capacity (RemCap) shows how much more product could be pumped into the tank safely.

• Available Volume (AvailVol) indicates how much product can be pumped out of the tank to the lowest (defined) possible point e.g. the tank outlet.

8.1.2 Free Water Volume - FWV

L00-NXA82xxx-16-00-00-xx-036

In some cases the tank can also contain water. It can derive from the delivered crude oil, the processing or by tank breathing. The (innage) water level information together with a Water Tank Capacity Table (W-TCT) result in the Free Water Volume. It is substracted from the TOV.

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Tankvision Calculations

Base Temp.

Ambient temp.

CTSh

Tank Shell

details

Tank Shell correction

air density

Ref. density

NoGo

Zones

Floating

Roof

corrections

Roof

Details

Floating Roof

corrections

B AAA BB

8.1.3 Tank Shell Correction - CTSh

• The Tank Shell expands and contracts with temperature changes (compared to TCT calibration temperature)

• Some countries require CTSh (Correction for Tank Shell temperature effects)

• For heated products the CTSh can be in excess of 0.3% TOV

L00-NXA82xxx-16-00-00-xx-037

For more details see → ä 56, Chapter "CTSh". The Tank Shell Correction is a factor which is multiplied with the TOV reduced by the FWV.

8.1.4 Floating Roof Correction - FRC

L00-NXA82xxx-16-00-00-xx-038

A tank can often have a floating roof. A floating roof is called so because it floats on the product stored in the tank. The roof moves up or down along with product level. Since the roof is floating on the tank, it displaces some amount of product depending on the weight of the roof and the density of the product. This displacement in product level results in a different apparent level, introducing an error into the volume calculations. The product volume therefore needs to be corrected. A floating roof often has supporting legs. The roof can be rested on these legs when the level is too low or the tank is empty. This allows maintenance staff to enter below the roof for carrying on tank maintenance. Based on the product level, the floating roof can be landed on the legs or floating on the product. However, in a certain range of product level, the floating roof can be partially landed. This zone is called "critical zone". In the Tankvision system there can be two critical zones related to the position of the floating roof legs.

Endress+Hauser 31

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Calculations Tankvision

Volume

132

Roof Landed

Height

Roof Take Off Height

Level

RLH

without FRA

with FRA

RTOH

123

FR ’

L00-NXA82xxx-16-00-00-xx-040

Inside critical zone: 3a Apply full FRA 3b Do not Apply FRA 3c Do not calculate FRA 3d Use partial FRA (interpolate)

Floating roofs can already be considered in the TCT.

8.1.5 Weight correction of the floating roof

The Floating roof position can be changed due to heavy snowfall, rain, sand or during unloading which triggers the roof to fluctuate that may cause variations in the stock inventory calculation. It's required to compensate Floating Roof immersion and also to compensate changing weight on floating roof. The floating roof position can be monitored with 3 additional level sensors mounted on top of the floating roof. The level devices are connected to gauges which will be connected to Tankvision NXA820.

L00-NXA82xxx-00-00-00-xx-001

1FR Level 1 2FR Level 2 3FR Level 3

To measure the submersion or elevation of a floating roof it is required to monitor the level of the roof. If the gauges are on the floating roof, then the average of the distances FR1/2/ 3 compared to the average of the Reference FR1/2/3 provide:

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Tankvision Calculations

ΔFR = FR ’ − FR

11 1

ΔFR = FR ’ − FR

22 2

ΔFR = FR ’ − FR

33 3

ΔFR =

ΔFR

123

+FR+FRΔΔ

Sump/Pipe

volume

TOV

GOV GOV = (TOV - FWV) CTSh FRA + SPV´± {}

FRA

Add Sump/Pipe Volume

Correct for Floating Roof Weight

CTSh Apply CTSh

FWV Subtract Free Water Volume

Floating

Roof

corrections

L00-NXA82xxx-00-00-00-xx-002

If ΔFR < 0 then we have an elevation If ΔFR > 0 then we have a submersion Additional volume and mass of the floating roof calculated as:

ΔV = ΔFR × A

Δm =ΔFR × AFR × ρ

: The numerical value of the horizontal cross-sectional area floating roof

Δm : Additional Mass of the floating roof (Mass of snow, sand, rain or others) ρ : Observer Density ΔV : Addition Volume displaced in floating roof due to snow/rain/sand or others

Total mass of the roof = Original mass of the Floating roof (m') + Additional Mass of the floating roof due to snow, rain etc. (Δm) m = m' + Δm m = m' + ΔFR *A

* ρ

This equation can be used to calculate the GOV of the tank. GOV = TOV – (ΔFR * A

+ m / ρ)

8.1.6 Sump/Heel/Pipe volume

Volume of the Sump and Pipes are added.

8.1.7 Gross Observed Volume - GOV

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Page 34

Calculations Tankvision

VCF = e

[- t(1.0+0.8t)]aD aD

60 60

a60==

K +K p +K p

01 2

**2

K0K

p*2p

900

800

700

600

500

400

300

X10 (°F)

5 -1

.81.01.21.4 1.61.82.02.22.4 2.6

(1/p) X 10 [kg/m ]

25 32

8.1.8 Volume Correction Factor - VCF

The VCF corrects for the temperature expansion of the liquid. Especially hydrocarbons have a large expansion factor. The most common VCF corrections were developed by American Society for Testing and Materials (ASTM), USA and Institute of Petroleum, UK and updated regularly. There are more authorities issuing VCF corrections. Most of them are derived from the ASTM/IP tables.

VCF Implementation

• Calculations are based on "representative samples" ("generalized products")

• The "Tables" are based on specific calculation procedures

• Calculation is complex and rounding and truncating unique. There are many small but significant differences - exact requirements and needs depend on application, country and company.

L00-NXA82xxx-16-00-00-xx-044

1 Gasolines 2Crudes 3Jets 4 Fuel oils 5 Lube oils

VCF Tables

• The formulas are too complex for direct use - hence the "Tables" were printed

• There are specific tables for: – Products (crudes, refined products, lube oils, alcohols, palm oil, chemicals, etc.) – Different measurement units (kg/m³ vs. °API, °C vs. °F, etc.) – Different "Reference" or standard temperature (60 °F, vs. 15 °C, 25 °C or 30 °C) – Each table has range limits – Tables for VCF and for density correction are available

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Tankvision Calculations

Most known VCF "Tables"

The Tables are normally grouped in pairs:

• Tables 5 and 6 - ODC resp. VCF °API at 60 °F

• Tables 53 and 54 - ODC resp. VCF kg/m³ at 15 °C

• Tables 24 and 25 - ODC resp. VCF RD 60/60 °F at 60 °F

• Tables 50 and 60 - ODC resp. VCF kg/m³ at 20 °C

Most tables have so called Product Codes:

• A = for generalized crude’s

• B = for refined products

•C = for chemicals

• D = for lube oils

• E = liquefied gases

For chemicals normally a "polynomial equation" is used.

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Calculations Tankvision

VCF = EXP [- t(1.0+0.8t)]aD aD

15 15

K = 346.4228

K = 0.4388

where:+Dt = DEGC - 15.0

VCF = {D - A 10E3 (T -T) - B 10E3 (T - T)

- C 10E3 (T -T) - D 10E3 (T -T)

- E 10E3 (T -T) } / D

Ref Obs Ref obs Ref

Obs Ref Obs Ref

Obs Ref Ref

´´ ´´

´´

3 4

TCF = K0 + K1t + K2´ D ´ D ´ D ´ Dt + K3t + K4 t

234

Dt = t - T

Ref

TCF = 1 - TCF (T - T)´

Obs Ref

Typical table example: 54B (1980)

The range of application:

Density, kg/m³ Temperature, °C

653.0 to 778.5 -18.0 to 90.0

779.0 to 824.0 -18.0 to 125.0

824.5 to 1075.0 -18.0 to 150.0

L00-NXA82xxx-16-00-00-xx-046

Special corrections

VCF Chemical 1

with:

•D

= Reference density

Ref

•T

= Actual or observed temperature

Obs

•T

= Reference Temperature

Ref

• A-E = Configurable coefficients

TCF Method

with:

•K

, K1, K2, K3, K4 = Customer coefficients

• t = Actual product temperature

•T

= Reference Temperature

Ref

For the VCF we can write:

L00-NXA82xxx-16-00-00-xx-049

L00-NXA82xxx-16-00-00-xx-050

L00-NXA82xxx-16-00-00-xx-051

With the TCF method the p provided) and an actual p no actual p

is available.

Obs

can be calculated with p

Ref

can be calculated with p

Obs

/ VCF (when manual p

Obs

x VCF, when p

Ref

is known and

Ref

36 Endress+Hauser

Obs

Page 37

Tankvision Calculations

D = K + K T + K (T ) + K (T ) + K (T )

Obs 0 1 Obs 2 Obs 3 Obs 4 Obs

´´´´

234

D = K + K T + K (T ) + K (T ) + K (T )

ref 0 1 ref 2 ref 3 ref 4 ref

´´´´

234

K + K T + K (T ) + K (T ) + K (T )

0 1 Obs 2 Obs 3 Obs 4 Obs

´´´´

234

K + K T + K (T ) + K (T ) + K (T )

0 1 ref 2 ref 3 ref 4 ref

´´´´

234

VCF =

Product temp.

Table & Product

Code

Ref. density

VCF

Obs. Dens.

API/ASTM

Volume Correction

Factor calculation

GOV

VCF

GSV

Palm oil

L00-NXA82xxx-16-00-00-xx-052

For the VCF we can easily derive: VCF= D

Obs/Dref

L00-NXA82xxx-16-00-00-xx-053

VCF Calculation

• The API/ASTM Tables are a "primary" need for any Tank Inventory system

The correct table for the product must be chosen. Together with the Product temperature and reference density the VCF can be calculated. In addition to the VCF the observed density can be calculated.

8.1.9 Gross Standard Volume - GSV

The Gross Standard Volume is calculated by applying the VCF to the GOV.

L00-NXA82xxx-16-00-00-xx-048

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Calculations Tankvision

S&WV

S&W

calculation

Sediment & Water

calculations

CSW

SWF = 1 - (100 - S&W%) / 100

= S&W%/100

S&WV

S&W

CSW

GSV

NSV

S&W

calculation

11.

Net Standard Weight

calculation

8.1.10 Sediment & Water - S&W

L00-NXA82xxx-16-00-00-xx-072

• Some products have entrained (suspended) sediment and water (S&W) – i.e. crudes

• S&W is determined from sample by laboratory method ("Karl-Fisher"-method). The Sediment and Water percentage (S&W%) determined with the sample is transferred in the Sediment and Water Fraction (SWF). A correction factor for the product is determined.

As second result the Sediment and Water Volume can be calculated.

Sediment & Water calculation methods

There are 6 methods to calculate S&W

1. SWV = 0

2. SWV = TOV x SWF

3. SWV = (TOV - FWV) x SWF

4. SWV = {(TOV - FWV) x CTSh} x SWF

5. SWV = GOV x SWF

6. SWV = GSV x SWF ("standard" or "default" method)

Where the sediment and water fraction (SWF) is:

8.1.11 Net Standard Volume - NSV

L00-NXA82xxx-16-00-00-xx-058

L00-NXA82xxx-16-00-00-xx-056

Subtracting the SWV from the GSV result in Net Standard Volume.

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Tankvision Calculations

Hydrom. corr.

Product Code

Obs. density &

Obs. temp.

Ref. Density

Obs-Ref

density

conversion

Reference Density

Calculation

HYC = 1.0 - A (t - T) - B(t - T)

HYC Cal HYC Cal

´´

8.1.12 Density calculations

L00-NXA82xxx-16-00-00-xx-073

We have to distinguish between: observed and reference density

• Observed density is the density of the product at actual (observed) temperature

• Reference density is the density the product would have if we heat/cool it until the reference temperature (usually 15 °C/60 °F)

• Reference density is used to calculate VCF, FR and mass

• If you know the RefDens you can easily geht the ObDens ObsDens = RefDens x VCF

• If you know the ObsDens you need (API/ATSM) tables and the sample temperature to get the RDC (reference density correction factor).

• You can also correct for the thermal expansion of the hydrometer glass (HYC) RefDens = RDC x ObsDens x HYC

Hydrometer Correction - HYC

with:

• HYC = Hydrometer correction

•A

, B

HYC

= Thermal expansion coeff. for glass

HYC

• t = Temperature of sample

•T

= Calibration temperature of glass hydrometer

Cal

15 °C 0.000 0230 0 0.000 000 020

60 °F 0.000 0127 8 0.000 000 062

HYC

L00-NXA82xxx-16-00-00-xx-054

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Calculations Tankvision

Ref. Density1.

Servo Density

Product temp.

Ref. Density

VCF

Obs. Density

Product temp.

Sample Temp.

Pressure

Hydrom. corr.

Obs. Density

HTG or HTMS

density

Table & Product

Code

Ref. Density

NSV

Liquid Mass/

NSW in VacuumAir

11.

Net Standard Weight

calculation

Density handling in NXA820

L00-NXA82xxx-16-00-00-xx-110

NXA820 offers various possibilities to enter and further process density information:

1. Manual entry of Reference density (from laboratory)

2. Manual entry of Observed density with the according sample temperature (from laboratory) is required corrected for the hydrometer. With the above information and the according Product information and ASTM/IP table (for density correction) the reference density can be calculated.

3. Product pressure, temperature, density table (PTD table): look up table for observed density with the use of measured product temperature and pressure. With the from the table derived Observed density, the product temperature and the according Product information and ASTM/IP table (for density correction) the reference density can be calculated.

4. Density from HTG or HTMS calculation (→ ä 48). With the from the calculations derived Observed density, the product temperature and the according Product information and ASTM/IP table (for density correction) the reference density can be calculated.

5. Density measured by Servo gauge. With the by the servo gauge measured Observed density, the product temperature and the according Product information and ASTM/IP table (for density correction) the reference density can be calculated.

Having the reference density and the according Product information and ASTM/IP table (for volume correction) the VCF can be determined. Observed density can be calculated by multiplying reference density with VCF.

8.1.13 Mass/Net Weight in Vacuum

40 Endress+Hauser

L00-NXA82xxx-16-00-00-xx-074

Page 41

Tankvision Calculations

Air density

WAC

NSW in Air

Liquid Mass/

NSW in VacuumAir

Air corr.

calc.

10.

Net Weight in Air

Calculation

WAC =

NWA = WAC Mass´

1 -

Dens

Air

Dens

Ref

Dens

Vap

Dens

Brass

• Mass in temperature and product property independent

• Mass is needed for "Loss Reconciliation" required for every refinery and terminal

• Mass is calculated out of NSV and the reference density (or GOV and observed density)

8.1.14 Net Weight in Air - NWA

L00-NXA82xxx-16-00-00-xx-075

• The flotation of a body is based on the principle discovered by Archimedes on century 3 BC "Every submerged body in a liquid experience a vertical upper force that is equal to the weight of the liquid displaced"

• Considering the liquid displaced is air

• The flotation is related to the liquid density where the body is floating because: Weight = Vol x Dens.

Calculation formula:

L00-NXA82xxx-16-00-00-xx-057

DensAir Air density DensRef Product reference density

DensVap vapor density DensBrass Brass density used to calibrate the weight scale

Net weight in Air methods

WAC Methods Calculated AirDen VapDen BrassDen

Weight in vacuum No 0 0 0

OIML R85 Yes 1.2 1.2 8000

Table 56 Yes 1.22 1.22 8100

Table 57 (short tons)

Table 57 (long tons) Yes 1.224 1.224 8135.8

Simplified Yes 1.1 0 1

Custom Yes 1.225 1.225 8553

Yes≈ 1.2194 1.2194 8393.437

The Net Standard Weight in Air is in some countries called Mass.

Endress+Hauser 41

Page 42

Calculations Tankvision

Product Temp

Ref. Density

FWL

Amb. Temp

Product Temp

Insulation Type

Steel Expa. coef

FRA Mass(G)

S&W

NWA

WCF

(Ref. Density - 1.1

WCF

(Ref. Density - 1.1

NSW/Product

Mass/Total

Mass

Obs. Density

Product Temp

Ref. Density

VSPAvailVol**

RemCap**

LEVEL

Water Density

at 4°C

TOV

VCF

GOV

NSV

Level

HyDC Vol.

FWV**

CTSh**

CSW**

Ref. Density

Sump/Pipe

Volume

Calculate Tank

shell correction**

S&W

Calculation**

«»Table 59 A.b.D

Ref. Density Calc.**

Calculate Gauge

Volume**

«»Table 60 A.B.D

Calculate VCF**

Calculate FWV**

Water TCT

Product TCT

VSP Table

FRA Volume

8.2 GBT calculation flow chart

The GBT standard is the standard for China. Main difference is the hydrostatic deformation of the tank not being part of the product TCT but in a separate table. The VCF and density calculations are based on the same ASTM/IP tables like the API calculations.

L00-NXA82xxx-16-00-00-xx-033

42 Endress+Hauser

Page 43

Tankvision Calculations

Level

Calculate Gauge

Volume**

Product TCT

VSP

LEVEL

VSP Table

8.2.1 Calculated Gauge Volume

L00-NXA82xxx-16-00-00-xx-093

The Calculated Gauge Volume is determined with the level information and the Tank Capacity Table (TCT). The Calculated Gauge Volume is the volume observed at the present (temperature) conditions without considering the hydrostatic deformation of the tank.

The TCT is a tank specific table created by calibration holding the level to volume transfer information. To differentiate the TCT for the Product and for the Water the TCT gets marked with a P (P-TCT).

The level information needed for this step is in innage which is the normal way the level is transferred from the gauge. In case the gauge inputs ullage to the system a calculation into innage is necessary beforehand (Ullage subtracted from Mounting position).

8.2.2 Static Pressure Correction Volume - VSP

L00-NXA82xxx-16-00-00-xx-094

The VSP is determined with the level information and the static pressure correction table (VSP-table). The VSP is the volume the tank expands at the actual level if it would be filled with water (wet calibration).

Endress+Hauser 43

Page 44

Calculations Tankvision

Product Temp

Obs. Density

Ref. Density

VSP

Water Density

at 4°C

HyDC Vol.

«»Table 59 A.b.D

Ref. Density Calc.**

HyDC = [Vsp ]´ r

rw4

= [ / ]r

AvailVol**

RemCap**

TOV

VSP Vol.

Calculate Gauge

Volume**

FWL

FWV**

Calculate FWV**

Water TCT

8.2.3 Hydrostatic Deformation Correction Volume - HyDC Vol

L00-NXA82xxx-16-00-00-xx-095

The Hydrostatic Deformation Correction Volume is the real from the product fill level created hydrostatic volume. It is calculated by correcting the VSP with the ratio of the density of the product versus the water density.

20 Reference Density at 20 °C (68 °F)

w4 Water Density at 4°C (39°F)

The reference density of the Product can be calculated (if not known) with the Observed Density, the Product/Sample Temperature and the Reference Density Table for the Product.

8.2.4 Total Observed Volume - TOV

L00-NXA82xxx-16-00-00-xx-097

The Total Observed Volume is calculated from the Calculated Gauge Volume and the Hydrostatic Deformation Correction Volume.

Two more information can be derived from TCT and level:

• Remaining Capacity (RemCap) shows how much more product could be pumped into the tank safely

• Available Volume (AvailVol) indicates how much product could be pumped out of the tank to the lowest (defined) possible point e.g. the tank outlet.

8.2.5 Free Water Volume - FWV

L00-NXA82xxx-16-00-00-xx-098

In some cases the tank can also contain water. It can derive from the delivered crude oil, the

44 Endress+Hauser

processing or by tank breating. The (innage) water level information together with a Water Tank Capacity Table (W-TCT) result in the Free Water Volume. It is subtracted from the TOV.

Page 45

Tankvision Calculations

Amb. Temp

Product Temp

Insulation Type

Steel Expa. coef

CTSh**

Calculate Tank

shell correction**

FRA Mass(G)

WCF

(Ref. Density - 1.1

FRA Volume

TOV

GOV

FWV

CTSh**

Sump/Pipe

Volume

8.2.6 Correction for the thermal Expansion of the tank shell - CTSh

L00-NXA82xxx-16-00-00-xx-099

• The Tank Shell expands and contracts with temperature changes (compared to TCT calibration temperature)

• Some countries require CTSh (Correction for Tank Shell temperature effects)

For more details see → ä 56, Chapter "CTSh".

8.2.7 Floating roof adjustment - FRA

L00-NXA82xxx-16-00-00-xx-100

Additional displacement due to the air is considered, see Net Weight in Air calculation.

8.2.8 Sump/pipe volume

The Volume of the sump and pipes is added.

8.2.9 Gross Observed Volume - GOV

GOV is calculated like follows:

•Starting from the TOV

• Subtract FWV

• Multiply ba the thermal expansion correction factor

• Subtract the floating roof adjustment volume and

• Add the Sump/pipe volume

Endress+Hauser 45

L00-NXA82xxx-16-00-00-xx-101

Page 46

Calculations Tankvision

Ref. Density

Product Temp

VCF

«»Table 60 A.B.D

Calculate VCF**

S&W

CSW**

S&W

Calculation**

SWF = 1 - (100 - S&W%) / 100

= S&W%/100

VCF

GOV

NSV

CSW**

8.2.10 Volume Correction Factor - VCF

L00-NXA82xxx-16-00-00-xx-102

8.2.11 Sediment and Water

L00-NXA82xxx-16-00-00-xx-103

• Some products have entrained (suspended) sediment and water (S&W) – i. e. crudes

As second result the Sediment and Water Volume can be calculated.

Sediment & Water calculation methods

There are 6 methods to calculate S&W

1. SWV = 0

2. SWV = TOV x SWF

3. SWV = (TOV - FWV) x SWF

4. SWV = {(TOV - FWV) x CTSh} x SWF

5. SWV = GOV x SWF

6. SWV = GSV x SWF ("standard" or "default" method)

Where the sediment and water fraction (SWF) is:

8.2.12 Net Standard Volume - NSV

L00-NXA82xxx-16-00-00-xx-058

L00-NXA82xxx-16-00-00-xx-104

Net Standard Volume is calculated like follows:

• Starting from GOV

• Multiply by the Volume Correction Factor and

• Multiply by the S&W correction factor

46 Endress+Hauser

Page 47

Tankvision Calculations

NSW/Product

Mass/Total

Mass

NSV

Ref. Density

NWA

WCF

(Ref. Density - 1.1

NSV

8.2.13 Net Standard Weight - NSW / Product Mass

L00-NXA82xxx-16-00-00-xx-105

Mass is calculated by multiplying NSV with the Reference density.

8.2.14 Net Standard Weight in air - NWA

L00-NXA82xxx-16-00-00-xx-106

The Net Standard Weight in Air is calculated by multiplying the NSV with the Reference Density reduced by the influence of the Air buoyancy (Reference density - 1.1).

Endress+Hauser 47

Page 48

Calculations Tankvision

L =

P - P

D =

obs

8.3 Mass Measurement

Today, most hydrocarbons in the western world are bought and sold using volume measurement. However, in many eastern countries and in some specialised industries, product are sold based on mass due to traditions in particular markets, so mass calculation can be important in those areas of trade. Mass-based measurement offers other advantages, since mass is independent of product temperature and other parameters. For custody transfer, high accuracy tank gauging is required, and mass-based calculation is often used.

8.3.1 Hydrostatic Tank Gauging

The advantage of HTG is that it provides direct mass measurement with only pressure transmitters to measure hydrostatic pressure in determining density via a fixed distance and vapor pressure. Therefore, it is a low-cost solution for mass measurement. However, there are substantial disadvantages:

• Level and volume measurements are less accurate, especially when density stratification occurs.

• Density is only measured at the between the two pressure sensors.

• Difficult to verify, commission and calibrate

L00-HTGSxxx-05-00-00-xx-001_

The middle or P2 transmitter is unique to Hydrostatic Tank Gauging.

48 Endress+Hauser

Page 49

Tankvision Calculations

obs

P1 - P

L - Z

8.3.2 Hybrid Tank Measurement Systems

A Hybrid Tank Management System (HTMS) is a combination of conventional level gauging, enhanced with one or two pressure transmitters for continuous measurement of the actual observed density in a bulk liquid storage tank. Or otherwise stated, it is a combination of level and hydrostatic pressure measurement. Pressure measurement, combined with level, provides true average density measurement over the entire product level height. Normally, the vapor (top) pressure is identified as P as P

Advantage of HTMS

• Accurate level measurement

• Continuous density measurement

• Excellent mass and volume measurements

and the hydrostatic (bottom) pressure is identified

L00-HTGSxxx-05-00-00-xx-002

Endress+Hauser 49

Page 50

Calculations Tankvision

Level

Calculate

TOV

AvailVol

RemCap

TCT

FWV

Calculate

FWV

FWL

CtSh

GOV

GSV

S&W

Calculation

FRA

NSV

HTG

Product Pressure

Calculate

Liquid Mass

Liquid Mass/

NSW in Vacuum/Air

Ref. Density

Total Mass

in Vac/Air

Air Density

Mass in Vap

Level

Product Temp

VCF

Tank Shell

Details

Ambient Temp

Roof Details

Air Density

TCV

FWV

API/ASTM

Ref. Density

Product Temp

Obs. Density

S&W

Obs-Ref

Density

conversion

Obs. Density

Obs. Temp

Product Code

Hydrom. Cor.

Liquid to

Vapour Ratio

calculation

Vapour Vol

Vapour Density

Obs-Ref

Density

conversion

Vapour Press.

Vapour Temp.

Vapour Details

HTG

Mass of Water

HTG

Mass of

Sediment&Water

Mass of

Water

Mass of

Sediment&Water

Mass of

FRA

HTG

Mass of

FRA

V20

HTG

Gauged Volume

HTG

Mass of

Sediment&Water

S&W

HTG

Mass of

Sediment&Water

HTG

Mass of

Sediment&Water

S&W

HTG

Mass of

Sediment&Water

S&W

HTG

Mass of

Sediment&Water

S&W

OnTOV

S&W On

TOV - FWV

S&W On

(TOV–FWV)*CtSh

S&W On

(TOV–FWV)*CtSh

+FRA

S&W

On GOV

S&W

On NSV

YES

+/-

YES

8.3.3 HTG Calculation according to GOST R 8.595-2004

Enhanced-HTG-calculation

In case of indirect method based on hydrostatic principle, the product mass in capacity measures shall be determined by the measurement results of:

• Hydrostatic pressure of a product column – with aid of stationary measuring instrument of hydrostatic pressure.

• The product level – with aid of portable or other means of level measurement.

50 Endress+Hauser

Page 51

Tankvision Calculations

The stock-tank oil net mass shall be determined as a difference of a stock-tank oil gross mass and a dead matter mass. The dead matter mass shall be determined as a total mass of water, salts and mechanical impurities in stock-tank oil. For this purpose the mass fractions of water, mechanical impurities and chloride salts shall be determined in stock-tank oil and their masses calculated.

The stock-tank net mass shall be calculated using the formula:

•m = m

total

- m

dead matter

Where:

•m

= the stock-tank gross mass, determined as described below

total

dead matter

= the dead mass, calculated as described below.

Formula Details

This calculation is based on the correction of volume to 20 °C, in the Tankvision system 15 °C is the default temperature for reference condition – not 20 °C as per requirement for the GOST R 8.595-2004 standard.

The formula is fixed for 20 °C reference condition, configure VCF to use also 20 °C as reference.

•m = m

total

- m

dead matter

Where:

•m

= (1 / g) × P × V20(1 + 2α(TCT - 20)) / H

total

And

•V

= TOV

•m

dead matter

•m

Water

•m

Sediment&Water

•m

FloatingRoof

= m

Water

- m

FloatingRoof

= FWV × Wat. Density

= SW_Volume × S&W% × Ref. Density

= FRA × Obs. Density

+ m

Sediment&Water

• g = 9.81 m/sec² (adjustabel system environment setting)

• P = Product Pressure (P_PRESS)

• α = Temperature expansion factor (Fixed value shall be used: 12.5*10

•V

= Gauged Volume corrected to 20 °C (TOV shall be used)

•T

= tank wall temperature (PROD_TEMP Product Temperature shall be used)

-6

1/°C)

• H = Product level (P_LEVEL)

• FRA = Floating Roof Adjustment

• Obs. Density = Observed Density

• TOV = Tank Observed Volume

• VCF = Volume Correction Factor

• FWV = Free Water Volume

• Wat. Density = Density of Water

• NSV = Net Standard Volume

• Ref. Density = Reference Density

• S&W% = Percentage of Sediment and Water

• SW_Volume = the volume used according to the configuration set by the user to define how to apply the sediment and water effect, according to this setting it could be equal to: –TOV –TOV – FWV – (TOV – FWV)*CtSh, with CtSh is Tank Shell Correction factor – (TOV – FWV)*CtSh +FRA – GOV = Gross Observed Volume –NSV

Endress+Hauser 51

Page 52

Calculations Tankvision

NXA82x_Sediment-Water

REF_TEMP = default 15 °C

REF_TEMP will be set from the Reference Temperature setting from the VCF setting (see figure below: Reference Temperature setting used as calculation input). Standard is equal to 15 °C. To change the reference condition to 20 °C, select the Alternate setting, which shall be the new REF_TEMP.

NXA82x_VCF

System Integration

The selection when to use the HTG method to calculate the mass is placed in the product settings in the sub section Mass & Weight. In the Liquid Mass (Mass in Vacuum) Calculation Method dropdown menu you can find an entry called HTG Mode.

NXA82x_Mass-Weight

52 Endress+Hauser

Page 53

Tankvision Calculations

Vapor density

Vapor temp.

Vapor Press.

TankCapacity

VaporVol

TOV

Ref. Density

Mass in Vapor

Liquid to

Vapor Ratio

calculation

Density

conversion

Liquid in

Vapor

Calculation

Vapor

Details

Mass in Vapor

WAC

Total Mass

Calculation

Total mass

in Vac

Total mass

in Air

Liquid Mass/

NSW in Vacuum

8.4 Calculations for liquefied gases

The mayor difference in the calculation for liquefied gases compared to liquids is that the gas phase must be considered. Therefore a calculation for the mass of the product in the gas phase must be applied.

L00-NXA82xxx-16-00-00-xx-107

8.4.1 Total Mass

Total Mass = Liquid Mass + Vapor Mass

L00-NXA82xxx-16-00-00-xx-108

8.4.2 MBR method

• The method is based on a specific done by "Moore, Barrett & Redwood" in November 1985. The calculation procedure was specified for "Whessoe Systems and Controls Ltd.".

• Apart from the gas calculation, MBR defines a whole process to calculate VCF and RDC.

• This method is intended only for LPGs, but it might also give acceptable results for other Chemical gases - as long as the density and temperature are within the specified range.

• Density Input Range: 470 to 610 kg/m³.

• Temperature Input Range: -85 to 65 °C (-121 to 149 °F).

• It is not possible to use the M, B & R method for other Reference Temperatures than 15 °C.

The method is based on 10 steps:

1. Measure and input the data

2. VCF Calculation

3. Observed Density calculation

4. Calculate GSV

5. Calculate Liquid Mass

Endress+Hauser 53

6. Calculate Vapor Volume

7. Calculate Vapor Density

8. Calculate Vapor Mass

9. Calculate Total Mass

10. Calculate Total Weight

Page 54

Calculations Tankvision

Y1 Y2

TR TT VO

VD V2 VCF

V1 TR TT

= = = = = =

= = =

(DENL15 - 500) / 25

0.296-0.2395*X+0.2449167*X*X-0.105*X*X*X+0.01658334*X*X*X*X

368.8+4.924927*X+13.66258*X*X-6.375*X*X*X+1.08

7503*X*X*X*X

298.2/Y2 (1-TR)^(1/3) 1-1.52816*TT/1.43907*TT*TT-0.81446*TT*TT*TT/0.190454*TT*TT*TT*TT

1-1.52816*TT/1.43907*TT*TT-0.81446*TT*TT*TT/0.190454*TT*TT*

TT*TT

(-0.296123+0.386914*TR-0.0427258*TR*TR-0.0480645*TR*TR*TR)/(TR-1.00001)

(-0.296123+0.386914*TR-0.0427258*TR*TR-0.0480645*TR*TR*TR)/(TR-1.00001) V0*(1-Y1*VD) V1/V2

VO*

(1-Y1*YD) (TL+273.2)/Y2 (1-TR)^(1/3)

MBR - Data to be measured (1)

For the LPG application the following data should be real-time measured on the tank(s):

•Product level

• Product Temperature (spot or average)

• Vapor Temperature (spot or average)

• Vapor space pressure - also called "Vapor pressure"

Input data

• The liquid density at 15 °C (60 °F) has to be input by the operator. This density can either be obtained from a pressurized hydrometer and corrected via an appropriate table or should be established on basis of chemical analysis.

• The method as implemented in Tankvision also allows the operator to enter Observed or Actual density as a manual value. Tankvision will then calculate the corresponding Reference Density.

MBR - VCF Calculation (2)

The following formula shows the calculation method.

L00-NXA82xxx-16-00-00-xx-060

MBR - Observed density (3)

The observed density is calculated using the reference density and the VCF:

• Observed density = Density at 15 °C (60 °F) x VCF

The above equation can not be used to calculate the density under reference conditions (i.e. 15 °C (60 °F)).

MBR - Calculate GSV (4)

The gross standard volume is calculated using the Total observed volume and the VCF

• G.S.V = T.O.V x VCF

MBR - Calculate Liquid Mass (5)

The liquid mass is calculated out of the gross standard volume and the reference density:

• Liquid Mass = G.S.V. x Density at 15 °C (60 °F)

54 Endress+Hauser

MBR - Calculate Vapor Volume (6)

The vapor volume is obtained using the total tank volume and the liquid total observed volume:

• Vapor volume = Total Tank Volume - TOV

Page 55

Tankvision Calculations

(D.Ref - 500 / 33.3333)

43 + 4.4 X + 1.35 X - 0.15 X´´´

364 + 13.33 X + 8.5X - 1.833 X´´ ´

43 - 2.283 X + 0.05 X - 0.0667 X´´ ´

(TV + 273.2) / TC

(VP + 1.103) / PC

Locate smallest root of:

Compressibility Z should be in the range of 0.2 to 1 for typical LPG applications.

With:

0.214 - 0.034333 X + 0.005 X - 0.0001667 X´´ ´

Z - Z + Z(A - b - B ) - A B

32 2

´´

A = 0.42747 LPR/TR´´

B = 0.08664 PR/TR´

L = 1 + (0.48 + 1.574 W - 0.176W )(1 - SQRT (TR))´´´

(MW (VP + 1.013) / (0.08314 (TV + 273.2) Z´´´

VapDen

MBR - Calculate Vapor Density (7)

There are some steps to be followed to get the vapor density

• Molecular weight (MW)

• Critical temperature and pressure

• Reduced temperature and pressure

• Compressibility

•Vapor density

The Vapor density is calculated in [kg/m³]

MBR - Calculate Vapor Mass (8)

• The vapor mass (VM) can now be calculated: MV = Vapor Space x VapDens

• Calculate Total Mass: Total Mass = Liquid Mass + Vapor Mass

• Equivalent Vapor Liquid Volume EVLV = Vapor Mass / Liq. Ref. Density

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Page 56

Calculations Tankvision

8.5 CTSh

8.5.1 What is CTSh

CTSh stands for "Correction for Temperature of the Tank Shell". CTSh is about correcting for when the temperature of the tank shell is different than the calibration temperature of the tank. This temperature influence affects the calculated Inventory via (1) the gauge reading, and (2) via a change in the capacity of the tank as the tank diameter has changed under the temperature effect.

Temperature difference Volume change Temperature difference Volume change

1.0 °C (34 °F) 0.002% 50.0 °C (122 °F) 0.110%

5.0 °C (41 °F) 0.011% 60.0 °C (140 °F) 0.132%

10.0 °C (50 °F) 0.022% 70.0 °C (158 °F) 0.154%

20.0 °C (68 °F) 0.044% 80.0 °C (176 °F) 0.176%

30.0 °C (86 °F) 0.066% 90.0 °C (194 °F) 0.198%

40.0 °C (104 °F) 0.088% 100.0 °C (212 °F) 0.220%

Temperature Effect on Tank Volume for a given height of liquid (based tec for steel: 22x10

/°C

Temperature effect on gauge reading

The temperature effect via the Gauge Reference Height (GRH) affect the level reading and depends on:

• The actual product level in relation to the Gauge Reference Height (GRH),

• The gauge type, for example radar and servo are differently affected,

• The thermal expansion coefficient of the tank steel,

• and the actual tank shell temperature in relation to the tanks shell calibration temperature.

The temperature correction for the Gauge Level reading should be corrected in the Level gauge and NOT corrected in the Tank Inventory System.

Reason is that it makes more sense to this correction in the gauge itself:

• Level reading in Gauge and System should be identical with the same correction applied.

• The required correction depends on the gauge type. A servo, needs for example a different correction as the temperature effects on the measuring wire in the tank partly compensates the temperature effects of the tank shell. For a Radar this is not the case.

• Why burden the Tank Inventory system with corrections that are gauge specific.

Temperature effect on tank capacity

L00-NXA82xxx-15-00-00-xx-001

The temperature effects also the tank capacity via the tank shell diameter. With the changed diameter, the surface area is changed, and as result the tank can contain more or less liquid product depending on whether the tank shell temperature is higher or respectively lower than the tank shell calibration temperature.

56 Endress+Hauser

Page 57

Tankvision Calculations

shell

7/8 * T + 1/8 * T

product ambient

shell

I * T + (1 - I) * T

f product f ambient

CTSh 1 + 2 **T +*ad a2dT

While the Level gauge is affected by two influences, one related to the thermal effects on the "wet" part of the tank shell, and one for the "dry" part of the tank shell, the tank capacity is only affected by the "wet" part of the tank shell. Hence we also only have to establish the temperature of the "wet" part, i.e. the part in direct contact with the liquid product.

Wet tank shell temperature

It is unpractical to measure the tank shell temperature for each and individual tank. Hence one common "estimate" method is used for all tanks. This method is based on the ambient temperature (Tamb) and the actual liquid product temperature. For most tanks the following expression is specified in the standards:

L00-NXA82xxx-16-00-00-xx-002

Unfortunately there are also tanks which behave differently. This can be tanks with a real thermal insulation, but they can also be buried. Hence we had re-write the above equation so we could use a "insulation factor" I

L00-NXA82xxx-16-00-00-xx-003

Where:

•T

= Temperature of "wet" tank shell

shell

•T

•I

Now we can use the I

= Temperature of liquid product in tank

product

= Ambient temperature

ambient

= Insulation Factor

and use one common equation. Selecting the Insulation factor is

simple:

•I

= 1.0 for all tanks where the tank is somehow insulated, and

•I

= 7/8 for all other tanks

Of course you can modify this setting in the configuration of Tankvision.

Observe the following information!

• In Appendix B you can find a table with some examples as illustration.

• How to obtain the ambient temperature is discussed further on.

Thermal expansion

With the Shell temperature we can now calculated the expansion of the tank capacity. This factor is indicated with the name CTSh. Late we will see how it applied to the calculated volume. The CTSh equation depends on the tank type.

Endress+Hauser 57

Vertical cylindrical tanks

The equation for vertical cylindrical tanks for the volumetric CTSh is relative easy:

L00-NXA82xxx-16-00-00-xx-004

Where:

• α = Linear thermal expansion coefficient of tank shell material

• δT = Tank Shell Temperature - Tank Calibration temperature

Page 58

Calculations Tankvision

CTSh 1 + 2 **Tad=

CTSh 1 + 2 **T +*ad

adT

CTSh 1 +*T * f‘ad

f‘ (h * r) / (h * r - (h / 3))

223

CTSh 1 +*T * f‘‘ad

The complexity starts with inconsistencies between the CTSh calculation as specified in various International standards.

In IP PMP No. 11 (paragraph C.2, page 20) the above equation (1) is simplified to:

L00-NXA82xxx-16-00-00-xx-005

In order to be able to combine both equations, we have rewritten the equations to:

L00-NXA82xxx-16-00-00-xx-007

Where:

• α

= Linear thermal expansion coefficient

• α

= Area or surface thermal expansion coefficient

• δT = T

shell

- T

calib

Spherical tanks

Temperature correction for Spherical Tanks is calculated using the following equation:

L00-NXA82xxx-16-00-00-xx-008

Where:

• f’ = non-dimension factor representing change in partial volume, corresponding with h/2

The factor f’ can be calculated with:

L00-NXA82xxx-16-00-00-xx-009

Where:

• h = liquid depth

• r = vessel radius

Observe the following information!

• This calculation is conform to IP PMP No. 11

• Refer to Appendix A3 for values of f’

Horizontal cylindrical tanks (bullets)

Temperature correction for Horizontal Cylindrical Tanks is calculated using the following equation:

L00-NXA82xxx-16-00-00-xx-010

Where:

• f’’ = non-dimension factor representing change in partial volume, corresponding with h/r2

The factor f’’ can be calculated with:

58 Endress+Hauser

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Tankvision Calculations

F‘‘ 1 + 2 * ( - sin ) / ( - sin * cos ){q qq q q}=

L00-NXA82xxx-16-00-00-xx-011

Where:

• h = liquid depth

• r = vessel radius

• θ = angle subtended by liquid surface at the centre of the circular cross-section

Refer to Appendix A3 for values of f’’.

Endress+Hauser 59

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Calculations Tankvision

Thermal expansion coefficient(s)

In the previous equations we have used two thermal expansion coefficients:

• α

= Linear thermal expansion coefficient

• α

= Area or surface thermal expansion coefficient

The first one represents the linear thermal expansion of the material of which the tank shell is made. The second factor represents the squared or area thermal expansion coefficient. It is of paramount importance that the factor used is in the correct engineering units, i.e. as fraction per °C or fraction per °F.

The method for this calculation depends on what equation is to be emulated:

• In case of equation CTSh (3) = 1 + 2 * α * δT + α

* δT

In this case "αS" can be derived from "α1" by squaring, i.e. "a_tec" = "1_tec"

• In case of equation CTSh (4) = 1 + 2 * α * δT In this case "α

• For spherical and horizontal cylindrical tanks "α

" should be set to zero.

Please also make sure that the exponent value is considered when entering the value in Tankvision. For example if "α 7/°C", the "α

" is set to be equal to "1.6 10^-5", while as engineering units shown is "10E-

" value to be entered is "160".

60 Endress+Hauser

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Tankvision Calculations

8.5.2 Measurement of ambient temperature

The CTSh should be calculated automatically, which is only possible if we also have the actual ambient temperature measured automatically. Tankvision is capable of integration of this temperature from field equipment. It can redistribute this information over the whole or part of the Tank Farm. This makes it possible to use one ambient temperature sensor and use the measure temperature for one or more tanks within the same Tankvision system.

Automatic measurement of ambient temperature on site

Exact recommendations on the location, installation and accuracy of the Ambient Temperature sensor are vague. The sensor should be located in the outside environment, be protected from direct sun shine, rain and wind, and preferable be approximately 1 meter (3 ft) from any building or large object.

An external Ambient Temperature sensor can be connected via:

• NRF590 – for example by adding an extra HART converter with temperature sensor, or by using the optional RTD input

• Proservo NMS53x – as above

Other methods may also possible be possible, depending on installed equipment and used field protocol. Please consult Endress+Hauser. Later we will also see that there is a special setting in Tankvision where we can disable fail propagation if the ambient temperature doesn’t work. After all it would be pretty horrific if the calculated inventory data of all tanks is suddenly useless, just because one sensor fails.

Manual entry of ambient temperature

It is also possible to enter the ambient Temperature manual. This could be used, for either verifying the CTSh calculations, or in the unlikely case the ambient temperature is in fail.

8.6 Alcohol calculations

8.6.1 The OIML R22

The OIML R22, as issued in 1975 deals with the calculations for the basic data "relating to the density and to the alcoholic strengths by mass and by volume of mixtures of water and ethanol". As per OIML R22 standards the range is -20 to +40 °C (-4 to +104 °F) and defines the following:

•Table I: Gives the Observe density as a function of the temperature and the alcohol strength by mass

• Table II: Gives the Observe density as a function of the temperature and the alcohol strength by volume

• Table IIIA and IIIB: Gives the standard (reference) density at 20 °C (68 °F) (Table IIIA) and the alcoholic strength by volume (Table IIIB) as a function of the alcoholic strength by mass

• Table IVA and IVB: Gives the standard density at 20 °C (68 °F) (Table IVA) and the alcoholic strength by mass (Table IVB) as a function of the alcohol strength by volume

• Table VA and VB: Gives the acloholic strength by mass (Table VA) and the alcoholic strength by volume (Table VB) as a function of the observe density at 20 °C (68 °F)

•Table VI: Gives the alcoholic strength by mass as a function of the observe density and temperature

•Table VII:

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Calculations Tankvision

Product Level

Input value

continues

Input value

spot

Output

Conversation

factors

Temperature

Alc. Strength

(Lab)

Mass

TCT Volume OIML R22Density

Gives the alcoholic strength by volume as a function of the observe density and temperature

• Table VIIIA and VIIIB: Gives the alcoholic strength by mass (Table VIIIA) and the alcoholic strength by volume (Table VIIIB) as a function of the observe density (density is read from alcoholmeter of soda lime glass at 20 °C (68 °F)) and temperature. Density at a given temperature is calculated by the given formula.

• Table IXA and IXB: Gives the alcoholic strength by mass (Table IXA) and the alcoholic strength by volume (Table IXB) as a function of the observe density (taken from hydrometer) and temperature

• Table XA and XB Gives the alcoholic strength by mass (Table XA) and the alcoholic strength by volume (Table XB) as a function of the observe density (taken from a instrument made of borosilicate glass) and temperature

• Table XIA and XIB Calculates volume using alcohol strength by mass (Table XIA) or alcohol strength by volume (Table XIB)

• Table XIIA and XIIB: Calculates volume using alcohol strength by mass (Table XIIA) or alcohol strength by volume (Table XIIB)

Currently Table I, II, IIIA, IVA, VI and VII are implemented in Tankvision NXA820.

L00-NXA82xxx-16-00-00-xx-109

62 Endress+Hauser

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Tankvision Calculations

Observed dens.

Level

VCF

Product temp.

Ref. density

Calculate density/

VCF

Calculate

Gauge Volume

Rem Cap. TOV(Gauged) Avail Vol.

Calib. Temp.Calculate CTShCTSh

Calculate FRAFRA

TOV

Calculate

TOV

GOV = TOV

Calculate GSV/TCV

GSV

Calculate

NSW(+WCF)

NSV=GSV

NSW

Calculate Vapour mass & Vapour density

Vapour press.

Vapour temp.

Vapour Volume.

Vapour mass

8.7 JIS calculation flow charts

The JIS standard is the Japanese Industrial Standard.

Endress+Hauser 63

JIS_calculation _flow-chart

Page 64

Calculations Tankvision

FRA = 0

FRA = (FRW / ) × FRPρ

ref

FRA = ((1 /) - × FRPρ

ref

(F /))FRW ×BSG

FRA = ((1 /) - × FRPρ

ref

(1 /))FRW ×BSG

FRA = 0

8.7.1 Main differences to the API standard

JIS is only available for the following product types:

• Generalized Crudes

• Generalized Refined Products

• Generalized Lubricants

•LPG

8.7.2 Volume Correction Factor - VCF

The following VCF table is implemented:

• JIS K 2249 2A

8.7.3 Density Calculation - RDC

If the user wants to calculate the Observed Density, RDC_JIS has to be selected in the RDC settings of the product:

• Observed Density = Reference Density x VCF

8.7.4 Floating roof adjustment - FRA

The following new options are available for the floating roof adjustments:

•(JIS) No FRA:

• (JIS) Nippon Kaiji:

• (JIS) Shin Nihon 1:

• (JIS) Shin Nihon 2:

JIS_FRA_No-FRA

JIS_FRA_Nippon-Kaiji

JIS_FRA_Shin-Nihon-1

• (JIS) Shin Nihon 3:

Where:

• FRW = Floating Roof Weight

64 Endress+Hauser

JIS_FRA_Shin-Nihon-2

JIS_FRA_No-FRA

Page 65

Tankvision Calculations

GSV / TSV

JIS method ==

Nippon kaiji

GSV = (TOV*VCF)-

FRA

JIS method ==

Shin Nihon 1

JIS method ==

Shin Nihon 3

GSV = TOV * VCF

GSV = (TOV*VCF)-

FRA

no (Shin Nihon 2)no (Shin Nihon 2)

GSV

GSV = (TOV*VCF)-

FRA

• FRP = Floating Roof Position

• ρ

= Reference Density

ref

• BSG = calibration density from TCT

• F = VCF (Volume Correction Factor)

Dependent on this selection GSV is calculated in the following way.

JIS_GSV-calculation

Endress+Hauser 65

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Calculations Tankvision

GOV =TOV-FRA

GOV

FRA method ==

Shin nihon 3

GOV

GOV = TOV

This selection influences also the GOV (Gross Observed Volume) calculation:

JIS_GOV-calculation

66 Endress+Hauser

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Tankvision Calculations

TOV

Product Type

== Asphalt

TOV = Gauged Vol *

CTSh

TOV = Gauged Volume

TOV

CF = 1 + 3 × × (T - T )α

8.7.5 Tank Shell Correction - CTSh

JIS_TOV-calculation

If the product type is not Asphalt, CTSh is not calculated. CTSh uses the following formula:

To calculate CF,

Where:

• α = Thermal expansion coefficient

• T = Measured temperature (°C)

•T

= Calibration temperature (15 °C)

JIS_CTSh_CF

Endress+Hauser 67

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Calculations Tankvision

8.8 Annex A.1

Parameter Name Gauge Map File Name/

HostLink Param Name

Report Tag Name Parameter

ID/

SI Unit Param Type

OPC Server Comm ID

Product Level P_LEVEL PROD_LVL 622 m Measured

Secondary Level S_LEVEL SECONDARY_LVL 623 m Measured

Free Water Level W_LEVEL FREE_WATER_LEVEL 624 m Measured

Product Temperature P_TEMP PROD_TEMP 625 °C Measured

Vapour Temperature V_TEMP VAPOUR_TEMP 626 °C Measured

Ambient Temperature A_TEMP AMBIENT_TEMP 660 °C Measured

Vapour Pressure V_PRESS VAPOUR_PRESS 627 kPa Measured

Observed Density P_OBS_D OBS_DENSITY 628 kg/m

Reference Density P_REF_D REF_DENSITY 661 kg/m

Measured /Calculated

Lab Density P_LAB_D LAB_DENSITY 2887 kg/m3Measured

Product Pressure P_PRESS PRESSURE 692 kPa Measured

Total Observed Volume TOT_OBS_VOL TOV 717 m

Rem. Tank Capacity (Dead Stock) REM_CAP_TANK REM_CAP 718 m

Available Volume AVAIL_VOL AVAIL_PROD 719 m

Sediment and Water Volume SED_W_VOL SED_WATER_LEVEL 720 m

Calculated

Product Level Change Rate P_LVLCHNG_RATE PROD_LVL_CNG_RATE 721 mm/sec Calculated

Volume Flow Rate TOTOBS_FLW_RATE TOV_FLOW_RATE 722 m

Net Standard Flowrate NETSTD_FLW_RATE NSV_FLOW_RATE 723 m

Mass Flow Rate TOTMASS_FLW_RATE TOT_MASS_FLOW_RATE 724 m

Free Water Volume FREE_W_VOL FWV 725 m

Gross Observed Volume GROSS_OBS_VOL GOV 726 m

Total Standard Volume TOT_STD_VOL TSV 752 m

/min Calculated

Calculated

Volume Correction Factor (VCF) VCF VOL_CORR_FACT 754 N.A. Calculated

Vapour Mass MASS_VAPR MASS_IN_VAP 756 kg Calculated

Net Weight in Air NET_WGHT_AIR NWA 760 kg Calculated

Net Standard Weight NET_STD_WGHT NSW 761 kg Calculated

Floating Roof Correction F_ROOF_ADJUS ROOF_CORRECTION 762 m

Calculated

Floating Roof Position F_ROOF_POS ROOF_POS 763 N.A. Calculated

Tank Shell Correction Factor TNK_SHELL_CORR TSHELL_CORR_FACTOR 774 N.A. Calculated

Gross Standard Volume GROSS_STD_VOL GSV 727 m

Net Standard Volume NET_STD_VOL NSV 728 m

Calculated

Product Mass P_MASS MASS_IN_LIQ 729 kg Calculated

Total Mass TOT_MASS TOT_MASS 730 kg Calculated

Vapour Room Volume VAPOUR_ROOM_VOL VAPOUR_ROOM_VOL 1592 m

Calculated

Temperature Element 1 TEMP_1 TEMP_1 1634 °C Measured

Temperature Element 2 TEMP_2 TEMP_2 1635 °C Measured

Temperature Element 3 TEMP_3 TEMP_3 1636 °C Measured

Temperature Element 4 TEMP_4 TEMP_4 1637 °C Measured

Temperature Element 5 TEMP_5 TEMP_5 1638 °C Measured

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Tankvision Calculations

Parameter Name Gauge Map File Name/

HostLink Param Name

Temperature Element 6 TEMP_6 TEMP_6 1639 °C Measured

Temperature Element 7 TEMP_7 TEMP_7 1640 °C Measured

Temperature Element 8 TEMP_8 TEMP_8 1641 °C Measured

Temperature Element 9 TEMP_9 TEMP_9 1642 °C Measured

Temperature Element 10 TEMP_10 TEMP_10 1643 °C Measured

Temperature Element 11 TEMP_11 TEMP_11 1644 °C Measured

Temperature Element 12 TEMP_12 TEMP_12 1645 °C Measured

Temperature Element 13 TEMP_13 TEMP_13 1646 °C Measured

Temperature Element 14 TEMP_14 TEMP_14 1647 °C Measured

Temperature Element 15 TEMP_15 TEMP_15 1648 °C Measured

Temperature Element 16 TEMP_16 TEMP_16 1649 °C Measured

Temperature Element 17 TEMP_17 TEMP_17 1652 °C Measured

Temperature Element 18 TEMP_18 TEMP_18 1653 °C Measured

Temperature Element 19 TEMP_19 TEMP_19 1654 °C Measured

Temperature Element 20 TEMP_20 TEMP_20 1655 °C Measured

Temperature Element 21 TEMP_21 TEMP_21 1656 °C Measured

Temperature Element 22 TEMP_22 TEMP_22 1657 °C Measured

Temperature Element 23 TEMP_23 TEMP_23 1658 °C Measured

Temperature Element 24 TEMP_24 TEMP_24 1659 °C Measured

Temperature Position 1 TEMP_POS_1, TEMP_POS_1 1660 m Measured

Temperature Position 2 TEMP_POS_2, TEMP_POS_2 1661 m Measured

Temperature Position 3 TEMP_POS_3, TEMP_POS_3 1662 m Measured

Temperature Position 4 TEMP_POS_4, TEMP_POS_4 1663 m Measured

Temperature Position 5 TEMP_POS_5, TEMP_POS_5 1664 m Measured

Temperature Position 6 TEMP_POS_6, TEMP_POS_6 1665 m Measured

Temperature Position 7 TEMP_POS_7, TEMP_POS_7 1666 m Measured

Temperature Position 8 TEMP_POS_8, TEMP_POS_8 1667 m Measured

Temperature Position 9 TEMP_POS_9, TEMP_POS_9 1668 m Measured

Temperature Position 10 TEMP_POS_10 TEMP_POS_10 1669 m Measured

Temperature Position 11 TEMP_POS_11 TEMP_POS_11 1670 m Measured

Temperature Position 12 TEMP_POS_12 TEMP_POS_12 1671 m Measured

Temperature Position 13 TEMP_POS_13 TEMP_POS_13 1672 m Measured

Temperature Position 14 TEMP_POS_14 TEMP_POS_14 1673 m Measured

Temperature Position 15 TEMP_POS_15 TEMP_POS_15 1674 m Measured

Temperature Position 16 TEMP_POS_16 TEMP_POS_16 1675 m Measured

Temperature Position 17 TEMP_POS_17 TEMP_POS_17 1676 m Measured

Temperature Position 18 TEMP_POS_18 TEMP_POS_18 1677 m Measured

Temperature Position 19 TEMP_POS_19 TEMP_POS_19 1678 m Measured

Temperature Position 20 TEMP_POS_20 TEMP_POS_20 1679 m Measured

Temperature Position 21 TEMP_POS_21 TEMP_POS_21 1680 m Measured

Temperature Position 22 TEMP_POS_22 TEMP_POS_22 1681 m Measured

Report Tag Name Parameter

ID/ OPC Server Comm ID

SI Unit Param Type

Endress+Hauser 69

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Calculations Tankvision

Parameter Name Gauge Map File Name/

HostLink Param Name

Report Tag Name Parameter

ID/

SI Unit Param Type

OPC Server Comm ID

Temperature Position 23 TEMP_POS_23 TEMP_POS_23 1682 m Measured

Temperature Position 24 TEMP_POS_24 TEMP_POS_24 1683 m Measured

Alcohol Content in Mass ALCOHOL_BY_MASS ALCOHOL_BY_MASS 2101 % Calculated

Alcohol Content in Volume ALCOHOL_BY_VOLUME ALCOHOL_BY_VOLUME 2102 % Calculated

Sample Temperature SAMPLE_TEMPERATURE SAMPLE_TEMPERATURE 1551 °C Measured

General Purpose Register 01 GP01 GP01 2601 N.A. Measured

General Purpose Register 02 GP02 GP02 2602 N.A. Measured

General Purpose Register 03 GP03 GP03 2603 N.A. Measured

General Purpose Register 04 GP04 GP04 2604 N.A. Measured

General Purpose Register 05 GP05 GP05 2605 N.A. Measured

General Purpose Register 06 GP06 GP06 2606 N.A. Measured

General Purpose Register 07 GP07 GP07 2607 N.A. Measured

General Purpose Register 08 GP08 GP08 2608 N.A. Measured

General Purpose Register 09 GP09 GP09 2609 N.A. Measured

General Purpose Register 10 GP10 GP10 2610 N.A. Measured

General Purpose Register 11 GP11 GP11 2611 N.A. Measured

General Purpose Register 12 GP12 GP12 2612 N.A. Measured

General Purpose Register 13 GP13 GP13 2613 N.A. Measured

General Purpose Register 14 GP14 GP14 2614 N.A. Measured

General Purpose Register 15 GP15 GP15 2615 N.A. Measured

General Purpose Register 16 GP16 GP16 2616 N.A. Measured

Protocol Alarm 1 PROTOCOL_ALARM_1 PROTOCOL_ALARM_1 2650 N.A. Measured

Protocol Alarm 2 PROTOCOL_ALARM_2 PROTOCOL_ALARM_2 2651 N.A. Measured

Protocol Alarm 3 PROTOCOL_ALARM_3 PROTOCOL_ALARM_3 2652 N.A. Measured

Protocol Alarm 4 PROTOCOL_ALARM_4 PROTOCOL_ALARM_4 2653 N.A. Measured

Percentage Level PERCENTAGE_LEVEL PERCENTAGE_LEVEL 2654 % Measured /Calculated

VSP Volume VSP_VOLUME,2 VSP_VOLUME 2700 m

Calculated

Gauge Error GAUGE_ERROR GAUGE_ERROR 2755 N.A. Measured

Gauge Status GAUGE_STATUS GAUGE_STATUS 2756 N.A. Measured

Analog Input ANALOG_INPUT ANALOG_INP 2841 % Measured

HTMS Product Temperature HTMS_P_TEMP HTMS_P_TEMP 2201 °C Calculated

Density Element 1 DENS_1 DENS_1 3001 kg/m

Density Element 2 DENS_2 DENS_2 3002 kg/m

Measured

Density Element 3 DENS_3 DENS_3 3003 kg/m3Measured

Density Element 4 DENS_4 DENS_4 3004 kg/m

Density Element 5 DENS_5 DENS_5 3005 kg/m

Measured

Density Element 6 DENS_6 DENS_6 3006 kg/m3Measured

Density Element 7 DENS_7 DENS_7 3007 kg/m

Density Element 8 DENS_8 DENS_8 3008 kg/m

Measured

Density Element 9 DENS_9 DENS_9 3009 kg/m3Measured

Density Element 10 DENS_10 DENS_10 3010 kg/m

Measured

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Tankvision Calculations

Parameter Name Gauge Map File Name/

HostLink Param Name

Report Tag Name Parameter

ID/

SI Unit Param Type

OPC Server Comm ID

Density Element 11 DENS_11 DENS_11 3011 kg/m3Measured

Density Element 12 DENS_12 DENS_12 3012 kg/m

Measured

Density Element 13 DENS_13 DENS_13 3013 kg/m3Measured

Density Element 14 DENS_14 DENS_14 3014 kg/m

Density Element 15 DENS_15 DENS_15 3015 kg/m

Measured

Density Element 16 DENS_16 DENS_16 3016 kg/m3Measured

Density Element 17 DENS_17 DENS_17 3017 kg/m

Density Element 18 DENS_18 DENS_18 3018 kg/m

Density Element 19 DENS_19 DENS_19 3019 kg/m

Density Element 20 DENS_20 DENS_20 3020 kg/m

Density Element 21 DENS_21 DENS_21 3021 kg/m

Measured

Density Element 22 DENS_22 DENS_22 3022 kg/m3Measured

Density Element 23 DENS_23 DENS_23 3023 kg/m

Density Element 24 DENS_24 DENS_24 3024 kg/m

Density Element 25 DENS_25 DENS_25 3025 kg/m

Measured

Density Element 26 DENS_26 DENS_26 3026 kg/m3Measured

Density Element 27 DENS_27 DENS_27 3027 kg/m

Density Element 28 DENS_28 DENS_28 3028 kg/m

Measured

Density Element 29 DENS_29 DENS_29 3029 kg/m3Measured

Density Element 30 DENS_30 DENS_30 3030 kg/m

Density Element 31 DENS_31 DENS_31 3031 kg/m

Measured

Density Element 32 DENS_32 DENS_32 3032 kg/m3Measured

Density Element 33 DENS_33 DENS_33 3033 kg/m

Density Element 34 DENS_34 DENS_34 3034 kg/m

Density Element 35 DENS_35 DENS_35 3035 kg/m

Density Element 36 DENS_36 DENS_36 3036 kg/m

Density Element 37 DENS_37 DENS_37 3037 kg/m

Density Element 38 DENS_38 DENS_38 3038 kg/m

Density Element 39 DENS_39 DENS_39 3039 kg/m

Density Element 40 DENS_40 DENS_40 3040 kg/m

Measured

Density Element 41 DENS_41 DENS_41 3041 kg/m3Measured

Density Element 42 DENS_42 DENS_42 3042 kg/m

Density Element 43 DENS_43 DENS_43 3043 kg/m

Measured

Density Element 44 DENS_44 DENS_44 3044 kg/m3Measured

Density Element 45 DENS_45 DENS_45 3045 kg/m

Density Element 46 DENS_46 DENS_46 3046 kg/m

Measured

Density Element 47 DENS_47 DENS_47 3047 kg/m3Measured

Density Element 48 DENS_48 DENS_48 3048 kg/m

Density Element 49 DENS_49 DENS_49 3049 kg/m

Measured

Density Element 50 DENS_50 DENS_50 3050 kg/m3Measured

Density Position 01 DENS_POS_1 DENS_POS_1 3051 m Measured

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Calculations Tankvision

Parameter Name Gauge Map File Name/

HostLink Param Name

Density Position 02 DENS_POS_2 DENS_POS_2 3052 m Measured

Density Position 03 DENS_POS_3 DENS_POS_3 3053 m Measured

Density Position 04 DENS_POS_4 DENS_POS_4 3054 m Measured

Density Position 05 DENS_POS_5 DENS_POS_5 3055 m Measured

Density Position 06 DENS_POS_6 DENS_POS_6 3056 m Measured

Density Position 07 DENS_POS_7 DENS_POS_7 3057 m Measured

Density Position 08 DENS_POS_8 DENS_POS_8 3058 m Measured

Density Position 09 DENS_POS_9 DENS_POS_9 3059 m Measured

Density Position 10 DENS_POS_10 DENS_POS_10 3060 m Measured

Density Position 11 DENS_POS_11 DENS_POS_11 3061 m Measured

Density Position 12 DENS_POS_12 DENS_POS_12 3062 m Measured

Density Position 13 DENS_POS_13 DENS_POS_13 3063 m Measured

Density Position 14 DENS_POS_14 DENS_POS_14 3064 m Measured

Density Position 15 DENS_POS_15 DENS_POS_15 3065 m Measured

Density Position 16 DENS_POS_16 DENS_POS_16 3066 m Measured

Density Position 17 DENS_POS_17 DENS_POS_17 3067 m Measured

Density Position 18 DENS_POS_18 DENS_POS_18 3068 m Measured

Density Position 19 DENS_POS_19 DENS_POS_19 3069 m Measured

Density Position 20 DENS_POS_20 DENS_POS_20 3070 m Measured

Density Position 21 DENS_POS_21 DENS_POS_21 3071 m Measured

Density Position 22 DENS_POS_22 DENS_POS_22 3072 m Measured

Density Position 23 DENS_POS_23 DENS_POS_23 3073 m Measured

Density Position 24 DENS_POS_24 DENS_POS_24 3074 m Measured

Density Position 25 DENS_POS_25 DENS_POS_25 3075 m Measured

Density Position 26 DENS_POS_26 DENS_POS_26 3076 m Measured

Density Position 27 DENS_POS_27 DENS_POS_27 3077 m Measured

Density Position 28 DENS_POS_28 DENS_POS_28 3078 m Measured

Density Position 29 DENS_POS_29 DENS_POS_29 3079 m Measured

Density Position 30 DENS_POS_30 DENS_POS_30 3080 m Measured

Density Position 31 DENS_POS_31 DENS_POS_31 3081 m Measured

Density Position 32 DENS_POS_32 DENS_POS_32 3082 m Measured

Density Position 33 DENS_POS_33 DENS_POS_33 3083 m Measured

Density Position 34 DENS_POS_34 DENS_POS_34 3084 m Measured

Density Position 35 DENS_POS_35 DENS_POS_35 3085 m Measured

Density Position 36 DENS_POS_36 DENS_POS_36 3086 m Measured

Density Position 37 DENS_POS_37 DENS_POS_37 3087 m Measured

Density Position 38 DENS_POS_38 DENS_POS_38 3088 m Measured

Density Position 39 DENS_POS_39 DENS_POS_39 3089 m Measured

Density Position 40 DENS_POS_40 DENS_POS_40 3090 m Measured

Density Position 41 DENS_POS_41 DENS_POS_41 3091 m Measured

Density Position 42 DENS_POS_42 DENS_POS_42 3092 m Measured

Report Tag Name Parameter

ID/ OPC Server Comm ID

SI Unit Param Type

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Parameter Name Gauge Map File Name/

HostLink Param Name

Density Position 43 DENS_POS_43 DENS_POS_43 3093 m Measured

Density Position 44 DENS_POS_44 DENS_POS_44 3094 m Measured

Density Position 45 DENS_POS_45 DENS_POS_45 3095 m Measured

Density Position 46 DENS_POS_46 DENS_POS_46 3096 m Measured

Density Position 47 DENS_POS_47 DENS_POS_47 3097 m Measured

Density Position 48 DENS_POS_48 DENS_POS_48 3098 m Measured

Density Position 49 DENS_POS_49 DENS_POS_49 3099 m Measured

Density Position 50 DENS_POS_50 DENS_POS_50 3100 m Measured

Floating Roof Tilt Level 1 FRT_LEVEL_1 FRT_LEVEL_1 3111 m Measured

Floating Roof Tilt Level 2 FRT_LEVEL_2 FRT_LEVEL_2 3112 m Measured

Floating Roof Tilt Level 3 FRT_LEVEL_3 FRT_LEVEL_3 3113 m Measured

Floating Roof Tilt Delta Level FRT_DELTA_LEVEL FRT_DELTA_LEVEL 3114 m Calculated

Floating Roof Tilt Delta Mass FRT_DELTA_MASS FRT_DELTA_MASS 3115 kg Calculated

Report Tag Name Parameter

ID/ OPC Server Comm ID

SI Unit Param Type

Endress+Hauser 73

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Calculations Tankvision

Fixed Roof

Tank

d = dry

Ts = Ifw * Tp + (1 - Ifw) * Ta

v = vapor

a = ambient

w = wet

TS =

Recommended Insulation Factor (IFw)

Ifw = (.825) Ifw = 1.0 Ifw = 1.0 Ifw = 1.0 Ifw = 1.0 Ifw =

p = product

Insulated

Tank

Tank with

Still. Well

(SW)

Tank with

Internal

FR & SW

External

Floating Roof

Tank with SW

Floating or

No Roof -

Direct

measurement

* Tp + * Ta

Tp Tp Tp Tp

8.9 Annex A.2

Insulation factors for various tank geometries

L00-NXA82xxx-16-00-00-xx-014

74 Endress+Hauser

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Tankvision Calculations

8.10 Annex A.3

Correction factors for CTSh (spheres (F’) and horizontal cylindrical tanks (F’’))

h/2r Spherical f’ Horiztl.

0.00

0.01 1.007

0.02 1.014 1.506 0.42 1.389 1.676

0.03 1.020

0.04 1.027

0.05 1.034 1.516 0.45 1.429 1.694

0.06 1.042

0.07 1.049

0.08 1.056

0.09 1.064

0.10 1.071

0.11 1.079 1.536 0.51 1.515 1.734

0.12 1.087

0.13 1.095

0.14 1.103

0.15 1.111 1.550 0.55 1.579 1.764

0.16 1.119

0.17 1.128

0.18 1.136 1.561 0.58 1.630 1.788

0.19 1.145

0.20 1.154

0.21 1.163 1.573 0.61 1.685 1.814

0.22 1.172

0.23 1.181

0.24 1.190

0.25 1.200

0.26 1.210

0.27 1.220

0.28 1.230

0.29 1.240

0.30 1.250 1.613 0.70 1.875 1.907

0.31 1.261

0.32 1.271

0.33 1.282 1.627 0.73 1.948 1.945

0.34 1.293

0.35 1.304

0.36 1.316 1.642 0.76 2.027 1.986

0.37 1.327

0.38 1.339

0.39 1.351 1.658 0.79 2.113 2.033

Cylinder f’’

1.503 0.41 1.376 1.670

1.509 0.43 1.402 1.682

1.512 0.44 1.415 1.688

1.519 0.46 1.442 1.700

1.522 0.47 1.446 1.707

1.525 0.48 1.471 1.713

1.529 0.49 1.485 1.720

1.532 0.50 1.500 1.727

1.539 0.52 1.531 1.741

1.543 0.53 1.546 1.748

1.546 0.54 1.563 1.756

1.554 0.56 1.569 1.772

1.557 0.57 1.613 1.780

1.565 0.59 1.648 1.796

1.569 0.60 1.667 1.805

1.577 0.62 1.705 1.823

1.581 0.63 1.724 1.833

1.586 0.64 1.744 1.843

1.590 0.65 1.765 1.853

1.594 0.66 1.786 1.863

1.599 0.67 1.807 1.874

1.603 0.68 1.829 1.885

1.608 0.69 1.852 1.896

1.617 0.71 1.899 1.920

1.622 0.72 1.923 1.932

1.632 0.74 1.974 1.958

1.637 0.75 2.000 1.972

1.648 0.77 2.055 2.001

1.653 0.78 2.083 2.017

h/2r Spherical f’ Horiztl.

Cylinder f’’

0.40 1.364 1.664

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Calculations Tankvision

8.11 Annex A.4

Example CTSh calculations

Tank Type Vertical

Cylindrical

Vessel Radius

Product Level

α1 (apha) 6.2 x 10^-6 6.2 x 10^-6 0.000011 110 x 10^-7 6.2 x 10^-6

αs 4.01E-09 0 0 n.a. 4.01E-09

Tcal 60 °F 60 °F 15 °C 20 °C 60 °F

Tprod 300 °F 300 °F -43 °C 23.5 °C 88.3 °F

Tamb 70 °F 70 °F n.a. 74.5 °F

Ifs 0.875 0.875 1 1 0.875

CTSh 1.00279801 1.0026195 0.998724 1.000047 1.00032

Vertical Cylindrical

n.a. n.a. n.a. 17.253 n.a.

n.a. n.a. n.a. 4.6 n.a.

Vertical Cylindrical

Spherical Vertical

Cylindrical

8.12 Annex A.5

API Calculation VCF Tables

VCF TABLE

ASTM D1250-80 -Table 24A 60 F X

ASTM D1250-80 -Table 24B 60 F X

ASTM D1250-80 -Table 24C 60 F X

ASTM D1250-80 -Table 24D 60 F X

ASTM D1250-80 -Table 54A 15 C X

ASTM D1250-80 -Table 54B 15 C X

ASTM D1250-80 -Table 54C 15 C X

ASTM D1250-80 -Table 54D 15 C X

IP PMP No. 3 (1988) -Table 60A 20 C X

IP PMP No. 3 (1988) -Table 60B 20 C X

IP PMP No. 3 (1988) -Table 60C 20 C X

IP PMP No. 3 (1988) -Table 60D 20 C X

ASTM D1250-80 -Table 6A 60 F X

ASTM D1250-80 -Table 6B 60 F X

ASTM D1250-80 -Table 6C 60 F X

ASTM D1250-80 -Table 6D 60 F X

GPA TP-25 Table 24E 60 F X

GPA TP-27 Table 24E 60 F X

GPA TP-27 Table 54E 15 C X

GPA TP-27 Table 60E 20 C X

Reference

Temperature

Reference

Temperature Unit

Generalized

Crudes

Generalized

Refined Products

Special

Application

Generalized

Lubricants

Asphalts

Palm Oil

Chemicals

Industrial Aromatics

LPG

76 Endress+Hauser

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Tankvision Calculations

VCF TABLE

TCF Method 15-1XXXXX XX

ASTM D4311-96M 15 C X

ASTM D4311-96I 60 C X

ASTM D1555 - Industrial Aromatic HC 60 F X

ASTM D1555M - Industrial Aromatic HC 15 C X

ASTM D1250-1953 - Table 54 for LHC 15 C X

M B & Redwood VCF 15 C X

Chemical 1 15 -1 X

Palm Oil 15 -1 X

1/DCF 0CXXXXXXXXX

ASTM D1250-04 -Table 24A 60 F X

ASTM D1250-04 -Table 24B 60 F X

ASTM D1250-04 -Table 24C 60 F X

ASTM D1250-04 -Table 24D 60 F X

ASTM D1250-04 -Table 54A 15 C X

ASTM D1250-04 -Table 54B 15 C X

ASTM D1250-04 -Table 54C 15 C X

ASTM D1250-04 -Table 54D 15 C X

ASTM D1250-04 -Table 60A 20 C X

ASTM D1250-04 -Table 60B 20 C X

ASTM D1250-04 -Table 60C 20 C X

ASTM D1250-04 -Table 60D 20 C X

ASTM D1250-04 -Table 6A 60 F X

ASTM D1250-04 -Table 6B 60 F X

ASTM D1250-04 -Table 6C 60 F X

ASTM D1250-04 -Table 6D 60 F X

ASTM D1250-80 -Table 24A 60 F X

ASTM D1250-80 -Table 24B 60 F X

ASTM D1250-80 -Table 24C 60 F X

ASTM D1250-80 -Table 24D 60 F X

ASTM D1250-80 -Table 54A 15 C X

ASTM D1250-80 -Table 54B 15 C X

ASTM D1250-80 -Table 54C 15 C X

ASTM D1250-80 -Table 54D 15 C X

IP PMP No. 3 (1988) -Table 60A 20 C X

Reference

Temperature

Reference

Temperature Unit

Generalized

Crudes

Generalized

Refined Products

Special

Application

Generalized

Lubricants

Asphalts

Palm Oil

Chemicals

Industrial Aromatics

LPG

Endress+Hauser 77

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Calculations Tankvision

8.13 Annex A.6

API Calculation RDC Tables

RDC TABLE

Ref.

Temp.

Ref.

Temp. Unit

Gen.

Crudes

Gen.

Refined Products

Spec. Appl.

ASTM D1250-80 -Table 23A 60 F X

ASTM D1250-80 -Table 23B 60 F X

ASTM D1250-80 -Table 23D 60 F X

ASTM D1250-80 -Table 53A 15 C X

ASTM D1250-80 -Table 53B 15 C X

ASTM D1250-80 -Table 53D 15 C X

ASTM D1250-80 -Table 59A 20 C X

ASTM D1250-80 -Table 59B 20 C X

ASTM D1250-80 -Table 59D 20 C X

ASTM D1250-80 -Table 5A 60 F X

ASTM D1250-80 -Table 5B 60 F X

ASTM D1250-80 -Table 5D 60 F X

GPA TP-25 Table 23E 60 F X

GPA TP-27 Table 23E 60 F X

GPA TP-27 Table 53E 15 C X

GPA TP-27 Table 59E 20 C X

M B & Redwood DCF 15 C X

Chemical 1 15 -1 X

Palm Oil 15 -1 X

RDC = 1 / VCF 0CXXXXXXXXX

T.P.D.Table 15CXXXXXXXXX

ASTM D1250-04 -Table 23A 60 F X

ASTM D1250-04 -Table 23B 60 F X

ASTM D1250-04 -Table 23D 60 F X

ASTM D1250-04 -Table 53A 15 C X

ASTM D1250-04 -Table 53B 15 C X

ASTM D1250-04 -Table 53D 15 C X

ASTM D1250-04 -Table 59A 20 C X

ASTM D1250-04 -Table 59B 20 C X

ASTM D1250-04 -Table 59D 20 C X

ASTM D1250-04 -Table 5A 60 F X

ASTM D1250-04 -Table 5B 60 F X

ASTM D1250-04 -Table 5D 60 F X

Gen. Lubricants

Asphalts

Palm Oil

Chemicals

Ind. Aromatics

LPG

78 Endress+Hauser

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Tankvision Calculations

8.14 Annex A.7

GBT Calculation VCF Table

Table Name Reference

Temperature

IP PMP No. 3 (1988) -Table 60A 20 C X

IP PMP No. 3 (1988) -Table 60B 20 C X

IP PMP No. 3 (1988) -Table 60D 20 C X

ASTM D1250-04 -Table 60A 20 C X

ASTM D1250-04 -Table 60B 20 C X

ASTM D1250-04 -Table 60D 20 C X

Reference Temperature Unit

Generalized Crudes

Generalized Refined Products

Generalized Lubricants

8.15 Annex A.8

GBT Calculation RDC Tables

Table Name Reference

Temperature

ASTM D1250-80 -Table 59A 20 C X

ASTM D1250-80 -Table 59B 20 C X

ASTM D1250-80 -Table 59D 20 C X

T.P.D.Table 15CXXX

ASTM D1250-04 -Table 23A 60 F X

ASTM D1250-04 -Table 23B 60 F X

ASTM D1250-04 -Table 23D 60 F X

ASTM D1250-04 -Table 59A 20 C X

ASTM D1250-04 -Table 59B 20 C X

ASTM D1250-04 -Table 59D 20 C X

Reference Temperature Unit

Generalized Crudes

Generalized Refined Products

Generalized Lubricants

8.16 Documentation

Document Instrument Description

TI00419G/00/EN Tankvision Inventory Management System with completely

integrated software for operation via standard web browser

TI01252G/00/EN Micropilot NMR81 Micropilot NMR8 Series intelligent tank gauges are

TI01253G/00/EN Micropilot NMR84

TI01248G/00/EN Proservo NMS80 Proservo NMS8x Series intelligent tank gauges are

TI01249G/00/EN Proservo NMS81

TI01250G/00/EN Proservo NMS83

Endress+Hauser 79

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 80

Calculations Tankvision

Document Instrument Description

TI01251G/00/EN Tankside Monitor NRF81 Tankside Monitor NRF81 is a robust gateway for

collecting and integrating tank gauging data in storage and process applications. It fulfills the exacting demands of tank inventory management, inventory control, custody transfer, loss control, total cost saving, and safe operation.

TI00452G/08/EN Proservo NMS5 Intelligent tank gauge with high accuracy performance

Liquid level, I/F, Density & Density Profile

TI00402F/00/EN Tank Side Monitor NRF590 Field device for tank sensor operation and monitoring

and for integration into inventory control system

TI00344F/00/EN Micropilot S FMR531 Continuous level transmitter for continuous and non-

TI01122F/00/EN Micropilot S FMR532

TI00344F/00/EN Micropilot S FMR533

TI01123F/00/EN Micropilot S FMR540 Continuous level transmitter for continuous and non-

TI00042G/08/EN Prothermo NMT539 Intrinsically safe multi-signal converter with precision

TI00049G/08/EN Prothermo NMT532 Intrinsically safe multi-signal converter with precision

TI00345F/00/EN Micropilot M FMR23x, FMR24x Continuous and non-contact level measurement. Cost-

TI00358F/00/EN Levelflex M FMP40 Continuous Level Transmitter for:

TI01001F/00/EN Levelflex FMP51, FMP52, FMP54 Level and interface measurement in liquids

TI00436P/00/EN Cerabar M PMC51, PMP51,

PMP55

TI00383P/00/EN Cerabar S PMC71, PMP71,

PMP75

TI00434P/00/EN Deltabar M PMD55 Differential presure transmitter with metal sensor

TI00382P/00/EN Deltabar S

PMD70/75, FMD76/77/78

TI00401F/00/EN Liquicap M FMI51, FMI52 For continuous measurement in liquids

contact precision level measurement. For custody transfer and inventory control applications with NMiand PTB-approvals

contact precision level measurement. For custody transfer and inventory control applications with NMi and PTB approvals

average temperature and water bottom sensor for inventory control and custody transfer applications

average temperature sensor for inventory control

effective 4 to 20 mA 2-wire technology. Suitable for hazardous locations.

- Level Measurement in Bulk Solids and Liquids

- Interface Measurement in Liquids

Pressure transmitter with ceramic and metal sensors; With analog electronics or communication via HART, PROFIBUS PA or FOUNDATION Fieldbus

Pressure transmitter with ceramic and metal sensors Overload-resistant and function-monitored; Communication via HART, PROFIBUS PA or FOUNDATION Fieldbus

Communication via HART, PROFIBUS PA or FOUNDATION Fieldbus

Differential pressure transmitter with ceramic and silicon sensors; Overload-resistant and function monitored; Communication via HART, PROFIBUS PA or FOUNDATION Fieldbus

Document Instrument Description

BA00340G/00/EN Tankvision Tank Scanner NXA820, Data Concentrator NXA821,

Host Link NXA822

BA00339G/00/EN Tankvision Tank Scanner NXA820, Data Concentrator NXA821,

BA00424G/00/EN Tankvision Tank Scanner NXA820, Data Concentrator NXA821,

BA01137G/00/EN Tankvision Tankvision NXA820 OPC Server

Host Link NXA822

80 Endress+Hauser

Page 81

Tankvision

Index

Alcohol calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

API (American Petroleum Institute) . . . . . . . . . . . . . . . . 29

API Flow Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Application areas. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Calculated Gauge Volume. . . . . . . . . . . . . . . . . . . . . . . . . 43

Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Calculations for liquefied gases . . . . . . . . . . . . . . . . . . . . 53

Communication variants. . . . . . . . . . . . . . . . . . . . . . . . . . 19

Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Connection to Tankvision Professional. . . . . . . . . . . . . . 24

Connections to gauges and host systems . . . . . . . . . . . . 19

Correction factors for CTSh . . . . . . . . . . . . . . . . . . . . . . . 75

Correction for the thermal Expansion of the tank shell -

CTSh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

CTSh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Data Concentrator NXA821 . . . . . . . . . . . . . . . . . . . . . . . 12

Density Calculation - RDC. . . . . . . . . . . . . . . . . . . . . . . . . 64

Density calculations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Density handling in NXA820 . . . . . . . . . . . . . . . . . . . . . . 40

Designated use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Example CTSh calculations. . . . . . . . . . . . . . . . . . . . . . . . 76

Examples. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Explosion picture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Field devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Field instruments and slave devices . . . . . . . . . . . . . . . . 19

Floating roof adjustment - FRA . . . . . . . . . . . . . . . . . 45, 64

Floating Roof Correction - FRC . . . . . . . . . . . . . . . . . . . . 31

Free Water Volume - FWV. . . . . . . . . . . . . . . . . . . . . 30, 44

GB (Chinese national standards) . . . . . . . . . . . . . . . . . . . 29

GBT calculation flow chart . . . . . . . . . . . . . . . . . . . . . . . . 42

Gross Observed Volume - GOV. . . . . . . . . . . . . . . . . . 33, 45

Gross Standard Volume - GSV . . . . . . . . . . . . . . . . . . . . . 37

Host Link NXA822 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Host Systems communication . . . . . . . . . . . . . . . . . . . . . 24

HTG Calculation according to GOST R 8.595-2004. . . . 50

Hybrid Tank Measurement Systems . . . . . . . . . . . . . . . . 49

Hydrometer Correction - HYC . . . . . . . . . . . . . . . . . . . . . 39

Hydrostatic Deformation Correction Volume - HyDC Vol. . 44

Hydrostatic Tank Gauging . . . . . . . . . . . . . . . . . . . . . . . . 48

Insulation factors for various tank geometries . . . . . . . . 74

Inventory control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

IT security. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

JIS calculation flow charts . . . . . . . . . . . . . . . . . . . . . . . . . 63

Mass Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Mass/Net Weight in Vacuum . . . . . . . . . . . . . . . . . . . . . . 40

MBR method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Measurement of ambient temperature . . . . . . . . . . . . . . 61

Modbus slave via Host Link NXA822 . . . . . . . . . . . . . . . . 24

Net Standard Volume - NSV . . . . . . . . . . . . . . . . . . . 38, 46

Net Standard Weight - NSW / Product Mass . . . . . . . . . 47

Net Weight in Air - NWA . . . . . . . . . . . . . . . . . . . . . 41, 47

OIML R22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

OPC DA server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

PC recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Screen examples in Browser . . . . . . . . . . . . . . . . . . . . . . . 26

Sediment & Water - S&W . . . . . . . . . . . . . . . . . . . . . 38, 46

Static Pressure Correction Volume - VSP . . . . . . . . . . . . . 43

Sump/Heel/Pipe volume . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Sump/pipe volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

System architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Tank Scanner NXA820. . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Tank Shell Correction - CTSh . . . . . . . . . . . . . . . . . . . 31, 67

Tankvision Alarm Agent . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Tankvision OPC Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Tankvision Printer Agent . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Total Mass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Total Observed Volume - TOV . . . . . . . . . . . . . . . . . . 30, 44

Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Volume Correction Factor - VCF . . . . . . . . . . . . . 34, 46, 64

Endress+Hauser 81

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www.addresses.endress.com

Endress+Hauser NXA820 Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1 Document information

1.1 Version history

1.2 Document function

1.3 Symbols

1.3.1 Safety symbols

1.3.2 Electrical symbols

1.3.3 Symbols for certain types of information

1.3.4 Symbols in graphics

1.4 Documentation

1.4.1 Operating instructions

1.5 Registered trademarks

2 Basic safety instructions

2.1 Requirements for the personnel

2.2 Designated use

2.2.1 Application

2.3 Workplace safety

2.4 Operational safety

2.5 Product safety

2.6 IT security

3Application

3.1 Inventory control

3.2 Application areas

4 Identifying the components

4.1 Nameplate

4.2 Tank Scanner NXA820

4.2.1 Ordering information

4.2.2 Product picture

4.3 Data Concentrator NXA821

4.3.1 Ordering information

4.3.2 Product picture

4.4 Host Link NXA822

4.4.1 Ordering information

4.4.2 Product picture

4.5 Explosion picture

4.6 Tankvision OPC Server

4.7 Tankvision Printer Agent

4.8 Tankvision Alarm Agent

5PC recommendations

5.1 PC connection for viewing data

5.1.1 Recommendations PC configuration

5.2 Recommendations when using OPC Server, Printer Agent or Alarm Agent

5.3 Alternations from the recommendations

6 Connections to gauges and host systems

6.1 Field instruments and slave devices

6.1.1 Communication variants

6.1.2 Field devices

6.2 Host Systems communication

6.2.1 OPC DA server

6.2.2 Modbus slave via Host Link NXA822

6.2.3 Connection to Tankvision Professional

7Examples

7.1 System architecture

7.2 Screen examples in Browser

8Calculations

8.1 API Flow Charts

API (American Petroleum Institute)

GB (Chinese national standards)

8.1.1 Total Observed Volume - TOV

8.1.2 Free Water Volume - FWV

8.1.3 Tank Shell Correction - CTSh

8.1.4 Floating Roof Correction - FRC

8.1.5 Weight correction of the floating roof

8.1.6 Sump/Heel/Pipe volume

8.1.7 Gross Observed Volume - GOV

8.1.8 Volume Correction Factor - VCF

VCF Implementation

VCF Tables

Most known VCF "Tables"

Typical table example: 54B (1980)

Special corrections

VCF Calculation

8.1.9 Gross Standard Volume - GSV

8.1.10 Sediment & Water - S&W

Sediment & Water calculation methods

8.1.11 Net Standard Volume - NSV

8.1.12 Density calculations