Saab Tank Control representative: - ProREXoil

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HEADQUARTERS:Saab Tank ControlBox 130 45SE-402 51 GothenburgSWEDENTel: int. + 46 31 337 00 00Fax: int. + 46 31 25 30 22E-mail: [email protected]: http://www.saab.tankradar.comFind your local representative on website

Saab Tank Control representative:


The ultimate radar level gaugeP O W E R F U L , C O M P A C T A N D S M A R T . A T A N K R A D A R .

A LWAYS O N T H E L E V E L


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A technical breakthroughthat will change your mind

• New state-of-the-art radar level gauge

• Developed for the process industry

• Accurate and extremely reliable

• Easy to install and to use

• Affordable for everyone

Imagine a new, revolutionary radar level

gauge that is accurate and extremely reliable

in a wide variety of applications and envi-

ronments. Compact, easy to install and use,

maintenance-free (everything you would

expect from a state-of-the-art Saab solution)

– at an affordable price.

Right, you’ve just thought of the latest

innovation from Saab Tank Control – Saab

TankRadar Pro. The new generation of radar

level gauges from the world’s leading manu-

facturer of radar level gauging equipment.

Developed for the majority of tanks in the

process industry.

Saab TankRadar Pro is smaller, lighter

and more flexible than its predecessors, yet

it is smarter and has higher sensitivity

making it more reliable too.

This is the product that will definitely

change your mind about level gauging.

All technical details are subject to change without prior notice.


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Advantage Saab TankRadar– advantage you

OUTSTANDING RELIABILITY

• not affected by tank conditions

• high accuracy (± 5 mm)

NO MAINTENANCE

• no moving parts

• internal automatic calibration

EASY TO USE

• interactive set-up

• adaptive and intelligent

LOW LIFE-CYCLE COST

• modular design

• no maintenance

• long lifetime

Radar gauging – superiorreliability and accuracy

Saab TankRadar Pro provides outstanding

reliability. The gauges have no moving parts

and the only part inside the tank is the

antenna. Saab TankRadar Pro uses the non-

contact measurement technique radar for

trouble-free and maintenance-free operation.

This results in a competitive and cost-

effective solution for level gauging app-

lications.

Saab TankRadar Pro features and benefits:


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The radar waves are almost unaffected by

dirt on the antenna, tank atmosphere,

regardless of liquid type in the tank, its

temperature or pressure. That is a big

advantage compared to other types of non-

contact level measurement techniques such

as ultrasonic and laser.

The high sensitivity of Saab TankRadar Pro

makes it suitable for a vast range of products

and tanks. No matter the height of the tank

or if there are turbulent surface conditions,

Saab TankRadar Pro will continue to perform

consistently and predictably.

When talking about sensitivity we are

actually describing the signal/noise ratio of

the measuring equipment. The higher the

ratio the more precise and reliable are the

readings obtained.

The new TankRadar Pro series has an

outstanding signal/noise ratio (sensitivity)

with an accuracy of ± 5 mm.

• Inventors of radar level gauging

• More than 40.000 units installed since 1975

• Market leaders in radar level gauging

• Well-known for delivering the most reliable radar level gauges in the

market

• World wide sales offices and technical support

Sensitivity – the key to success

Saab Tank Control:


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Three basic Saab TankRadar Pro

versions – Lite, Standard and Gold –

offer complete coverage of most level

measuring applications. And of course

you can get your own customized

version for very special requirements.

The choice has never been easier.

Designed for tanks without internal struc-

tures outside hazardous areas, for example

storage tanks.

Saab TankRadar Pro – Lite uses Fast

Fourier Transformation (FFT), one of the most

widely used signal processing techniques, to

ensure rapid level measurements level with

an accuracy of ± 10 mm.

The Lite version can optionally be

equipped with Saab’s echofixer, FHAST™ for

increased accuracy and MET™, as well as

various antennas.

Saab TankRadar Pro – Lite

Saab TankRadar Pro – Lite. Perfect for storage tanks.

If you have the application,we have the solution


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The Standard version of Saab TankRadar Pro

is suitable for most tanks, even those with

echo-disturbing internal structures, for

example tanks with agitators or baffles. It is

also suitable for spherical and bullet tanks.

This version uses FFT with the addi-

tion of Saab’s echofixer. Saab’s echofixer is a

package that continuously maps out all ra-

dar interference sources. This gives a reliable

level measurement also in agitated tanks.

Saab TankRadar Pro – Standard

Saab TankRadar Pro – Gold

The Gold version of Saab TankRadar Pro is

the most advanced version with an ope-

rating accuracy of ± 5 mm. It is suitable for

most tanks, also tanks with multiple agi-

tators, beams, heating coils and other

sources of false echoes that can seriously

compromise level gauging accuracy. For

example in agitated batch tanks, and other

tanks where higher accuracy and resolution

is required.

Saab TankRadar Pro – Gold includes

FFT, Multiple Echo Tracking (MET™), Saab’s

echofixer and FHAST™ as standard. An

agitator can present a complicated series of

false echoes when the liquid is at the same

level as the agitator. In such a situation the

MET™ enhancement enables the sensor to

consistently identify the correct echo. MET™

further increases the radar echo resolution

around the disturbing echoes.

Saab TankRadar Pro – Standard. Perfect foragitated tanks.

Saab TankRadar Pro – Gold performs accuratemeasurements in tanks with agitators, and withimproved resolution around disturbances.


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Rod antennaä For tanks up to 5 meters.

ä 2" or larger tank connections.

ä Only PTFE exposed to tank atmosphere.

ä Hygienic design.

ä Accuracy ± 10 mm.

Cone antennaä Cone dimensions 2”, 3”, 4”, 6” and 8”.

ä Withstands high pressures and temperatures.

ä Can be used for free propagation or still-pipe

measurement. (The 2” cone is only used for still-

pipe measurement.)

ä EEx IIC.

ä Materials exposed to the tank atmosphere:

PTFE or quartz sealing, antenna in steel or

other metals, o-ring in Viton or Kalrez.

Process sealä Suitable in hygienic or aggressive tank

atmospheres.

ä Cone antenna protected by a cherame or PTFE

sealing towards the tank atmosphere.

ä Withstands high pressures and temperatures.

ä 4" and 6" versions.

ä 4" version for hazardous applications (EEx IIB).

Parabolic antennaä Exposed parts in tank: Stainless steel and PTFE.

ä Highest antenna gain.

ä Withstands heavy contamination.

ä EEx IIC.

Saab TankRadar Pro Antennas


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Explosion FFT FHAST™ Echofixer METapproval Increased Disturbance Improved

accuracy±5mm echo handling resolution

Lite • option option option

Standard • • option • option

Gold • • • • •

General technical data

Power supply 100–240 VAC or 24–48 VDCLevel output Display, analog 4–20 mA superimposed with digital HART,

serial MODBUS, Profibus DPExtra output Analog 4–20 mA (for volume, signal quality etc.)Power consumption Max 10 WTank connection FlexibleAntennas Rod, Cone, Process Seal, ParabolicAntenna materials Teflon, SS 316L/HC22/Tantalum, Viton/KalrezPressure -1– Max 55 Bar (Vacuum–max 790 Psi)Tank temperature -40–400 ºC (-40–750 ºF)Ambient temperature -40–70 ºC (-40–158 ºF)Instrument accuracy ± 5 mm (± 0.2")Repeatability ± 1 mm (± 0.04")Standard measuringrange 0–50 m (0–165 ft.) Further distances on requestSensitivity Ultra HighProcessors Dual processor design, DSP: TI 50MFLOPS 32-bitEx approval EEx de [ib] IIC T6, Class I, Div. 1 & 2, Groups A, B, C and DOverfill protection TüV approval BPG-US 99/6001Weight 8 kg, 18 lbs.Height above flange 370 mm (15")

Modules in the different Saab TankRadar Pro versions


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Level

24500MENU ITEM GRPH

mm

Easy system configuration

Installing and configuring your Saab

TankRadar Pro is a quick and easy

process, regardless of whether the

gauge is used stand-alone or integra-

ted into an existing process control

system.

There is no downtime, due to emptying

tanks or halting on-going processes. Just

install the sensor unit on top of the tank,

connect a power source and, if required,

connect the unit to your existing system.

Stand-alone withintegrated display panel

For stand-alone applications, your Saab

TankRadar Pro can be equipped with a user-

friendly display panel which allows you to

monitor tank level, level rate, volume, signal

strength and other data. For single tanks

this is a cost-effective solution, offering full

access to all level data of interest.Stand-alone with integrated display panel.


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System integration – full flexibility

For larger tank farms operating under

automatic control systems, as DCSs or PLCs,

your Saab TankRadar Pro has full flexibility

with analog outputs, HART interface and

MODBUS. This allows full integration of

the Saab TankRadar Pro transmitters into

HART-communicator

connected to primary

analog output.

Two analog outputs

with superimposed

HART communication

to PLC and other

devices.

most existing control systems.

The built-in flexibility of Saab

TankRadar Pro combined with the HART

standard ensures that Saab TankRadar Pro

can be integrated with a minimum of effort

and cost.


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TankRadar L/2

Slave DataAcquisition Unit

Rex TankRadarPRO

TankRadarPRO

TRL/2

Field BusModem Field Communication

Unit

Integrating with Saab TankRadar system

By using the MODBUS field bus protocol,

Saab TankRadar Pro can be used in

combination with Saab Tank Radar Rex, the

market leading high accuracy radar tank

gauging system (± 1 mm) for custody transfer

applications. Saab’s Operator’s Interface (Saab

TankMaster) provides access to temp-

erature, pressure and oil/water interface

measurements, using Data Acquisition Units.

Integrating with Saab TankRadar system.


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Integrating with LAN

Saab TankRadar Pro can easily be inte-

grated into your own Local Area Network

by using the HART technology. This allows

easy access to transmitter data.

Integrating with PC-based Local Area Network (LAN).


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Outstanding technology forlevel measurementWhen designing a radar level gauge

choosing the right technical plat-

form is essential to achieve reliable

level measurement.

The time needed for the radar signal to

travel down to the surface and back again is

proportional to the distance between the

transmitter and the surface. Thus, the

product level can be calculated if the time is

known.

There are two main modulation

techniques: The pulse technique, which is

based on transmitting a radar pulse towards

the liquid surface, and actually measuring

the time for the pulse to return. Since it is

difficult to make accurate measurements of

such a small time interval, this technique is

only suitable for low accuracy applications.

The high performance radar level

gauge Saab TankRadar Pro uses the other

method – the optimal Frequency Modulated

Continuous Wave (FMCW) method.

The tank level is determined by processing thefrequency difference between the transmitted andreflected signals (FMCW).



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Accurate and reliable measurement– the FMCW method

Using FMCW, Saab TankRadar Pro trans-

mits a microwave signal with a con-

tinuously varying frequency towards the

liquid surface. When the reflected signal

returns to the Gauge, it is mixed with the

outgoing signal.

Since the transmitter continuously

changes the frequency of the transmitted

signal, there will be a difference in frequency

between the transmitted and the reflected

signals.

The gauge mixes the two signals,

resulting in a low frequency signal which is

proportional to the distance to the liquid

surface, and can be measured very accura-

tely. This permits fast, reliable and accurate

level measurements.

The FMCW method: The distance (d) is calculated by measuring the frequency difference (Df) between the transmittedfrequency (f1) and the reflected frequency (f0).



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10 GHz – the optimum frequency

Self-calibrating six times per second

Choosing the right microwave

frequency is essential in radar level

gauging. Higher frequencies give

shorter wavelengths which are more

sensitive to vapour, foam and conta-

mination. Up towards 24 GHz even

a small amount of water vapour is

enough to absorb the microwaves.

Lower frequency give longer

wavelength and wider beam angle,

which results in a lot of interference

echoes from the walls and agitators.

The optimum frequency has

been found to be around 10 GHz. Saab

TankRadar Pro is the sixth

generation of radar gauges from

Saab Tank Control that uses this

frequency.

While Saab TankRadar Pro con-

stantly measures the liquid level it

also sends a reference signal to a

built-in calibration line with a

known internal “distance”. Thus, it

is actually self-calibrating six times

per second – day after day, year

after year.

This feature eliminates down-

time for maintenance or recalibra-

tion procedures.

Saab TankRadar Pro is self-calibrating six times per second, throughoutits lifetime.

The optimum radar frequency is approximately 10 GHz.



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Digital Signal Processor

FFT

Disturbance EchoHandling

FHASTFilter

High Accuracy

Signal Product Level

ProgrammableMemory

DynamicMemory

Real TimeMemory

Multiple EchoTrackingEchofixer

The fine art of signal processing

The advanced functionality of the Saab

TankRadar Pro is implemented by using state-

of-the-art digital signal processing techno-

logy. Proven Saab technology is combined

with new, unique and innovative solutions

in order to provide robust and reliable

solutions for almost any application.

Saab TankRadar Pro signal processing schedule.



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Fast Fourier Transformation (FFT)

Fast Fourier Transformation (FFT) is the

simplest and one of the most widely used

signal processing techniques. FFT works

with relatively low resolution and accuracy.

The powerful Digital Signal Processor (DSP)

in Saab TankRadar Pro performs fast FFT

calculations of the incoming tank signal, and

provides a frequency spectrum that is

analysed to find the liquid surface. Since the

frequency is related to the distance between

the transmitter and the reflecting object, the

spectrum can be mapped to corresponding

tank levels.

FFT ensures fast level measurements with relativelylow resolution and accuracy (±10 mm).



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Saab’s echofixer – improves the disturbance echo handling

Saab’s echofixer is a software module that

improves the reliability of the level gauge

when used in tanks with agitators or other false

echo sources.

When there are echo-disturbing objects

in the tank such as agitators, baffles, mixers,

pipes, heating coils etc., the DSP must be

able to distinguish between the actual liquid

surface and the interfering echoes. Saab’s

echofixer adds sophisticated functionality to

improve the ability of Saab TankRadar Pro

to separate disturbing echoes from the

surface echo.

Saab’s echofixer registers echoes accor-

ding to certain criteria, thus making it possible

to use sophisticated methods for adapting

the measurement to various situations.

Dynamic and real-time updated information

from previous measurements is used to

make intelligent decisions based on collec-

ted information by the gauge itself. Saab’s

echofixer can also use information provided

by the operator as a complement to the

automatically collected data. The high

performance of the DSP makes it possible to

handle complex measurement situations.

Saab’s echofixer improves the reliability of the levelgauge when used in tanks with agitators or other falseecho sources.



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Fast High Accuracy SignalTechnique (FHAST™)– improves accuracy

Multiple Echo Tracking (MET™)– improves measurements in echo-disturbed

In order to further improve the measure-ment accuracy, Saab’s Fast High AccuracySignal Technique (FHAST™) can be appliedto the resulting signal. The FHAST™ filterlimits the region around the liquid surface tobe analysed, resulting in a much moreefficient signal processing.

FHAST™ provides significantly fasterand more precise signal processing by usingthe processor capacity on vital information.

By using a FHAST™ filter a significantincrease of the measurement accuracy, up to±5 mm, can be obtained.

In tanks with echo-disturbing objects, itmay be necessary to further increase theresolution, by adding the Multiple EchoTracking (MET™) module. MET™ increasesthe resolution of the radar “image” so thatthe sensor can identify genuine echoes moreeasily, and improve the accuracy in echo-disturbed areas.

MET™ provides even more advancedalgorithms which efficiently handle inter-fering echoes. An agitator, for example, cancause interference when the sensor attemptsto differentiate echoes from the liquid andagitator surfaces. MET™ measures on thedisturbance as accurate as on the surfacelevel, making it much easier to distinguishbetween the echoes.

The FHAST™ filter limits the region around the liquidsurface to be analysed, resulting in a much moreefficient signal processing.

In tanks with many disturbing objects, MET™ increasesthe resolution of the radar “image” so that the sensorcan identify the liquid level from disturbances.



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Sensitivity – the quality to handletough conditions

Saab TankRadar Pro has an ultra-

high sensitivity resulting in outstand-

ing reliability. For all radar gauges, a

certain amount of microwave ener-

gy has to return to the gauge. Only if

the reflected signal is sufficiently

stronger than the noise, a reliable

measurement can be made.

This is why sensitivity (or

signal/noise ratio) is one of the most

important qualities that differentiate

high quality gauges from less reli-

able types of gauges. A high signal/

noise ratio makes it possible to

detect and measure weaker echoes

– which normally appear in process

tanks where conditions change (for

conditions that affect the signal

strength, please refer to the list

next page).

To ensure accurate and extre-

mely reliable gauging even in the

toughest conditions, Saab TankRadar

Pro features an ultra-high sensitivity.The signal is affected by: 1) Distance attenuation. 2) Antenna size.3) Surface conditions. 4) Dielectric constant. 5) Foam. 6) Vapour, dust.7) Dirt on the antenna. See next page.



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The strength of the reflected signal is

affected by:

1) Distance attenuation which makes

the received radar signal weaker at

longer measuring distances.

2) Antenna size which influences the

performance substantially. A larger

antenna gives a narrower beam and

has a larger receiving area. A doub-

led area increases the signal/noise

ratio approximately six times.

3) Surface conditions such as waves

and turbulence can reduce the re-

flected energy. For process industry

applications it is practical to regard

a turbulent surface as the normal

case.

4) The dielectric constant eR. Different

types of liquids have different di-

electric constants, and can be divided

into two groups: “oil-like” and “water-

like”. The former group reflects only

a few percent of the microwave

energy, while the latter group re-

flects most of it.

5) Foam which in the worst case can

eliminate the echo, while in other

cases it may appear totally trans-

parent to the radar.

6) Vapour and dust in the tank atmosphere, which have

an influence on the performance similar to foam. This

influence is eliminated when using a frequency of

10 GHz.

7) Dirt on the antenna which affects performance in

the same way as foam. But with a highly sensitive

system like Saab TankRadar Pro, and a correctly desig-

ned and dimensioned antenna, the influence of dirt on

the antenna is reduced to a minimum.

Measuring on a turbulent water surface with a waveheight of 15 mm,corresponds to measuring on a calm hydrocarbon surface.

Of course, Saab TankRadar Pro is designed and

developed with the knowledge of these factors, thus

capable of delivering reliable measurement under any

conditions. In short – it is a gauge you can depend on,

whatever the application, partly due to its high

sensitivity.



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Your Saab TankRadar Prorepresentative will be pleasedto tell you more

The information provided here is of necessitybrief and meant as an introduction to reliableradar level gauging. We are convinced that SaabTankRadar Pro, together with its variousoptions, is a superior solution to your levelmeasurement requirements.

The next step is to contact your SaabTankRadar Pro representative. He has accessto all the detailed information you willeventually need and can give you a practicaldemonstration of the advantages of SaabTankRadar Pro.

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Saab TankRadar Pro is the best solution on the

market from both long and short term

perspectives. Now you probably want more

information, or try out a Saab TankRadar Pro

gauge. So please get in touch with us, either by

phone or by mailing or faxing this coupon.

Please send me more information:

Saab TankRadar Pro – Application examplesSaab TankRadar Pro – Technical descriptionSaab TankRadar Rex – the custodytransfer gauge

Please arrange to have someonecontact me personally

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Saab Tank Control representative: - ProREXoil

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