Rosemount® CTS - System Description
Ed 04
Product Data Sheet
February 2013
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Rosemount® CTS - System Description
Primary and Secondary CTS in one unit
Custody Transfer Measurement System for LNG
By tradition Rosemount Tank Radar AB has measured cargo
®
ullage on tankers since 1976. Dual/triple measurement
channel technology was introduced more than a decade
ago, and has since been applied in several thousand radar
gauges. From 1999 and until today we have supplied over
160 CTS systems for LNG Carriers worldwide. We have also
been providing radar based High Level and Overfill Alarm
systems developed specifically for LNG Carriers since 2007.
The new Rosemount CTS is a revolutionary product,
®
combining the dual measurement channel technology with
our CTS experience into a system that measures Primary
and Secondary CTS levels, temperatures and pressures.
With a single still pipe installation, and full integration of
data from both Primary and Secondary sensors, the need
for a separate backup level measurement system is gone.
©2013 Emerson Process Management. All rights reserved.
The Emerson logo is a trademark and service mark of Emerson Co. Rosemount and the
Rosemount logotype are registered trademarks of Rosemount Inc.
Emerson Process Management
Rosemount Tank Radar AB
Box 13045
SE-40251 Sweden
T +46 31 337 00 00
F +46 31 25 30 22
www.EmersonProcesss.com/mtm
www.EmersonProcess.com
Product Data Sheet
February 2013
The contents of this publication are presented for information purposes only, and while effort has
been made to ensure their accuracy, they are not to be construed as warranties or guarantees,
expressed or implied, regarding the products or services described herein or their use or
applicability. Standard Terms and Conditions of Sale can be issued by contacting Rosemount
Tank Radar AB. We reserve the right to modify or improve the designs and specifications of our
products at any time without notice. Rosemount Tank Radar AB accepts no responsibility for any
errors that may appear in this publication.
Rosemount® CTS - System Description
February 2013
System Configuration
Rosemount® CTS
Standard Features
Rosemount CTS for LNG carriers is a complete system for level,
pressure and temperature gauging.
Rosemount® CTS is a Custody Transfer
Measurement System (CTMS) for LNG
Carriers. It is primarily designed as a tank
gauging system, providing alarm handling
and communicating information to a cargo
control system for marine use.
The system includes the following features:
The Rosemount CTS provides accurate calculation of
the transferred volume according to custody transfer
standard methods. Built on proven technology,
verified methods and long experience within the area
of tank gauging, Rosemount CTS is composed of
several subsystems offering a wide range of functions
and solutions.
®
„„
Radar ullage measurement
„„
Temperature measurement
„„
Vapor pressure measurement
„„
Calculation of liquid levels
„„
Volume calculation on the basis of tank tables (tank capacity
table, trim/list correction table and thermal expansion/
contraction)
„„
Custody transfer reporting of calculated values
„„
Data logging and report printing
„„
Data transmission to cargo control system, ship computer and/
or load calculator
„„
Workstation computer graphical interface
®
The foundation of the system is built on the
intrinsically safe and intelligent Tank Gauge Unit
(TGU 53), the Supply and Communication Unit (SCU)
that acts as the connection hub and the Workstation
Unit (WSU) as the operator and computer interface.
The TGU 53 measures the distance to the cargo
surface using a radar signal and sends the measured
data to the SCU that communicates the processed
data with the WSU.
Rosemount CTS has a high degree of safety built into
the system and meets the requirements of all the
major international marine classification societies.
The system also meets all relevant requirements
from the IGC code and international standards for
LNG Custody Transfer.
Optional Features
®
®
Rosemount CTS is developed as a combined primary
and secondary level gauging system and a fail-safe
solution for the marine environment. The built-in
independency and redundancy supports uninterrupted
data acquisition regardless of sensor failure.
A typical configuration is built on two independent radar
channels, primary and secondary, and can be combined
with several redundancy functions, such as two sets
of temperature sensors, two vapor pressure sensors,
all included in the one and same TGU. Besides that a
workstation redundancy is added to the system providing
a fail-safe solution. The intelligent and intrinsically safe TGU
handles the signals from the radar sensor and the signals
from vapor pressure sensors and temperature sensors. With
up to two channels in the TGU, measuring independently
from each other, the measured data is also monitored from
the two separate service displays on the SCU.
®
Rosemount CTS can also be configured with one channel
only using the different redundancy solutions mentioned
above.
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Rosemount CTS also has the following optional features:
SCC = Supply and Communication Computer
SCD = Supply and Communication Display
SCT = Supply and Communication Tank Interface
SCU = Supply and Communication Unit
TGE = Tank Gauge Electronics
TGU = Tank Gauge Unit
WSU = Workstation Unit
„„
Handling of dual channel configurations, with Primary
and Secondary CTS gauging. The user can select which
measurement data that is used on screens and in CTS reports.
„„
Flexible Cargo Report System
„„
Draft gauging with the LevelDatic system
„„
Field bus modules for analog and digital inputs and outputs
„„
Independent Overfill and High Level Alarm, either with float
switch or radar sensor technology
„„
Tank display units
„„
Ship’s inclinometer
„„
Status information in Workstation mimic from independent
High Level and Overfill alarm system
„„
CTS measurement with offshore filtering of level readings
„„
Integration with IAS system