OIML Certified Level Measurements for Custody Transfer Tank Gauging
Highest precision in level, temperature, volume and mass measurements when buying and selling from bulk storage tanks
Legal Metrology Approved System for Terminals, Refining and Petrochem
When bulk chemical and petroleum products change hands, highest accuracy measurements are paramount. Not only for billing, accounting and taxation reasons, but also to achieve safe and efficient transfers and allow full utilization of tank storage capacity.
A tank gauging system used for custody transfer requires high performance and legal metrology approved devices in order to provide accurate measurement values for volume and mass calculations. Data points include level, free water level, average temperature, pressure, and in some cases reference density - all of which are received in real-time for accurate net volume calculations. The Rosemount Tank Gauging system delivers metrology approved instruments at every measurement point, as well as certified software and displays for calculations and read-out that can be metrologically sealed. With national and international approvals for all kinds of tank types and liquids, it ensures your most critical business transactions.
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Product Solutions
The Rosemount 5900S Radar Level Gauge delivers ±0.5 mm (0.020 in.) instrument accuracy, reducing level measurement uncertainty to a minimum. It enhances your storage operation by providing certified custody transfer accuracy, better inventory management and reliable loss control data.
The Rosemount 5900S is normally combined with high precision multi-spot temperature sensors for highest accuracy API standard net volume calculations.
The Rosemount 5900S takes overfill safety to a higher level with an innovative 2-in-1 feature which includes two radar gauges in one housing for independent level and overfill measurement. It is SIL 2 and SIL 3 certified according to IEC 61508 and enables API 2350 compliant solutions.
The Rosemount 5900S is normally combined with high precision multi-spot temperature sensors for highest accuracy API standard net volume calculations.
The Rosemount 5900S takes overfill safety to a higher level with an innovative 2-in-1 feature which includes two radar gauges in one housing for independent level and overfill measurement. It is SIL 2 and SIL 3 certified according to IEC 61508 and enables API 2350 compliant solutions.
- Get highest certified custody transfer accuracy for precise asset management of bulk liquid storage.
- Achieve higher safety with third party certified IEC 61508 SIL 2 or SIL 3 capability.
- Use one tank opening to install the 2-in-1 gauge for either redundant level measurements or to achieve independent safety and level measurement systems.
Accuracy
± 0.5 mm (± 0.020 in.).
Stability
Typically < ± 0.5 mm (0.020 in.) in -40 to +70 °C (-40 to +158 °F).
Update Rate
New measurement every 0.3 second.
Rosemount TankMaster is a powerful, easy-to-use Windows-based inventory management software package. Rosemount TankMaster collects real-time tank gauging data such as level, temperature, water interface level and pressure. It automatically calculates volume and mass for inventory and custody transfer for bulk liquid storage tanks. It also provides operator overview, configuration, setup and service for Rosemount tank gauging systems.
- Increase plant efficiency by getting a complete tank overview.
- Get real time inventory calculations with API standard net volumes.
- Achieve network interoperability with host systems and other vendors.
Tank Gauging
Data Level, temperature (average and spot), free water level, pressure, liquefied gas parameters (depending on system configuration).
Inventory Calculations
Total Observed Volume (TOV), Gross Observed Volume (GOV), Gross Standard Volume (GSV), Net Standard Volume (NSV), mass and density according to current API tables (6, 54, 24, A-D), ISO and other major standards.
LNG and Liquefied Gases: Support for full containment storage tanks, including: cool-down, leak detection and product profile temperature measurements, stratification monitoring and alarm handling as well as optional roll-over prediction.
LNG and Liquefied Gases: Support for full containment storage tanks, including: cool-down, leak detection and product profile temperature measurements, stratification monitoring and alarm handling as well as optional roll-over prediction.
Alarm Handling
Set-point alarms, alarm summary, alarm log and alarm event log.
The Rosemount 765 has an integrated water level sensor attached to the temperature sensor tube to measure free water level at the bottom of the tank. It enables correct product volume calculations.
Rosemount multiple spot temperature sensors measure temperature with a number of Pt-100 spot elements placed at different heights to provide a tank temperature profile and an average temperature.
Only fully immersed elements are used to determine product temperature. One of the temperature sensor elements may be installed inside the water level probe. Each sensor is connected to the Rosemount 2240S transmitter.
Rosemount multiple spot temperature sensors measure temperature with a number of Pt-100 spot elements placed at different heights to provide a tank temperature profile and an average temperature.
Only fully immersed elements are used to determine product temperature. One of the temperature sensor elements may be installed inside the water level probe. Each sensor is connected to the Rosemount 2240S transmitter.
- Get custody transfer net volume accuracy with three- or four-wire multiple spot temperature sensors for bulk liquid storage tanks.
- Improve accuracy with unique sensor calibration.
- Measure liquid temperature with up to 16 spot elements.
Accuracy
Temperature Sensors:
1/6 DIN Class B (standard), 1/10 DIN Class B (option).
Calibration option: Individually calibrated spot elements with four-wire connection enables ±0.025 °C (±0.045 °F) total sensor accuracy.
Water Level Sensor:
± 2 mm (0.08 in.) with 500 mm active length, ± 4 mm (0.16 in.) with 1000 mm active length.
1/6 DIN Class B (standard), 1/10 DIN Class B (option).
Calibration option: Individually calibrated spot elements with four-wire connection enables ±0.025 °C (±0.045 °F) total sensor accuracy.
Water Level Sensor:
± 2 mm (0.08 in.) with 500 mm active length, ± 4 mm (0.16 in.) with 1000 mm active length.
Element Type(s)
Pt-100 spot elements according to EN 60751
Number of Spot Elements
Up to 16 RTD spot elements:
• Three-wire common return or individual wiring.
• Four-wire individual wiring.
• Three-wire common return or individual wiring.
• Four-wire individual wiring.
The ultra-stable Rosemount 2240S is approved for demanding custody transfer applications, which require very accurate temperature measurements for net standard volume calculations.
It can be used with a Rosemount 565, 566, or 765 temperature sensor. The Rosemount 2240S connects up to sixteen 3- or 4-wire temperature spot elements and an integrated water level sensor.
It provides average liquid temperature for net volume calculation based on each individual spot temperature element in combination with the corresponding level value. It has an impressive temperature conversion accuracy of ± 0.05 °C (± 0.09 °F).
It can be used with a Rosemount 565, 566, or 765 temperature sensor. The Rosemount 2240S connects up to sixteen 3- or 4-wire temperature spot elements and an integrated water level sensor.
It provides average liquid temperature for net volume calculation based on each individual spot temperature element in combination with the corresponding level value. It has an impressive temperature conversion accuracy of ± 0.05 °C (± 0.09 °F).
- Get ultra-stable temperature measurement for precise inventory calculations and custody transfer for API chapter 7.3 compliance.
- Obtain outstanding temperature conversion accuracy of ±0.05 °C (±0.09 °F).
- Connect up to 16 three- or four-wire temperature elements.
Accuracy
±0.05 °C (±0.09 °F). Over measuring range and ambient temperature 20 °C (68 °F).
Ambient Temperature Effect
±0.05 °C (±0.09 °F).
Measuring Range
Supports -200 to 250 °C (-328 to 482 °F) for Pt-100.
The Rosemount 2230 Graphical Field Display presents tank gauging data such as level, temperature, pressure and total observed volume. It provides all tank data directly in the field, and offers different view options. This back-lit user-friendly display is designed for tough environments and can be installed in hazardous (Ex) areas, on the tank roof or at the foot of the tank. It is approved for legal custody transfer.
- Observe real time tank gauging data such as level, temperature, pressure and total observed volume.
- Choose between seven languages and several view options.
- Install in hazardous areas.
Display Variables
Level, level rate, ullage, signal strength, volume (TOV), liquid average temperature, 1-16 spot temperature, vapor average temperature, ambient temperature, free water level, vapor pressure, liquid pressure, air pressure, observed density, and flow rate.
Display/Interface
Back-lit LCD monochrome display, 128x64 pixels.
Communication Protocol
Foundation™ Fieldbus for connection to Rosemount 2410 with self-configuring Tankbus or any Foundation™ Fieldbus host system.
