Rosemount TankRadar Pro Technical Description

www.rosemount-tg.com

Technical Description

501026En, Ed. 3, Rev E
July 2007

Radar Level Gauge

Technical Description

501026En, Ed. 3, Rev E
July 2007

TankRadar Pro

3

Contents

System overview ________________________________________________ 5

Features _______________________________________________________ 6

Measurement principle ___________________________________________ 6

Applications ____________________________________________________ 7

Select the right Pro gauge ________________________________________ 8

Transmitter Head versions ________________________________________________8
Software modules _______________________________________________________8

Antenna versions ________________________________________________ 9

Cone antenna __________________________________________________________9
Parabolic antenna ______________________________________________________10
Still-pipe Array antenna __________________________________________________ 11
Process seal antenna ___________________________________________________12
Rod antenna __________________________________________________________13

Flanges _______________________________________________________ 13

Measuring range _______________________________________________ 14

System integration _____________________________________________ 15

4-20 mA HART® systems ________________________________________________15
TRL/2 eldbus systems __________________________________________________16
Foundation™ eldbus systems ____________________________________________16

Mechanical mounting ___________________________________________ 17

Free propagation _______________________________________________________17
Pipe installation ________________________________________________________18

Electrical connections ___________________________________________ 18

Specications _________________________________________________ 19

Product certicates _____________________________________________ 22

TankRadar Pro

Technical Description

501026En, Ed. 3, Rev E

July 2007

4

Copyright © July 2007
by Rosemount Tank Radar AB.

Technical data is subject to change without prior notice.
Rosemount Tank Radar AB accepts no responsibility for any errors that may appear in
this description.

Viton®, and Kalrez® are registered trademarks of Du Pont Performance Elastomers.
Hastelloy® is a registered trademark of Haynes International.
Monel® is a registered trademark of International Nickel Co.

HART® is a registered trademark of the HART Communication Foundation
FOUNDATION is a trademark of the Fieldbus Foundation.

DeltaV® is a trademark of Emerson Process Management group of companies.

All other marks are the property of their respective owners.

Ordering information ____________________________________________ 24

Transmitter Head ______________________________________________________24
Antennas _____________________________________________________________25

Cone antenna ______________________________________________________25
Cone antenna, extended _____________________________________________26
Cone antenna with integrated purging ___________________________________27
Parabolic antenna ___________________________________________________28
1- and 2-in. Still-pipe antennas _________________________________________29
Still-pipe Array antenna _______________________________________________30
Process Seal antenna ________________________________________________ 31
Rod antenna _______________________________________________________32
Model Code Example ________________________________________________32

Patents _______________________________________________________ 33

Technical documentation for TankRadar Pro ________________________ 33

Technical Description

501026En, Ed. 3, Rev E
July 2007

TankRadar Pro

5

System overview

Temperature
Sensor

Pro Parabolic
Antenna Gauge

Pro Still-pipe
Array
Antenna Gauge

Pro Cone
Antenna
Gauge

RTG 3900
TankRadar Rex

Field

Communication

Unit

2210 Display
Unit

Field Bus
Modem

TankMaster PC
Workstations in
network

Alternative
Connections
to DCS

Pro Still-pipe
Antenna Gauge

Pro Process
Seal Antenna
Gauge

Pro Rod
Antenna
Gauge

TankRadar Pro

Technical Description

501026En, Ed. 3, Rev E

July 2007

TankRadar ® Pro with its exible conguration is suitable

for both stand-alone applications and large-scale plant

installations with various tank types.

The FMCW method is based on a radar

sweep with continuous changes in
frequency.

f

1

f

0

f

max

f

1

f

0

f

min

Frequency (GHz)

Transmitted

Reected

Time

∆

f

t

0t1

∆

t

∆

f ~ ∆t ~∆d

d

6

• Multi-purpose radar level gauge

• No moving parts and no contact with the liquid

• No maintenance

• Highest reliability

• Easy installation

• High accuracy

• Handles difcult tank conditions due to
ultra-high sensitivity and unique signal
processing features

• High exibility with interchangeable
Transmitter Heads and antennas

• A wide array of antennas and versions for
best performance in all applications

• Interactive setup with Windows ® based PC
software or via display unit

• Analog 4-20 mA superimposed with HART ®,

and digital Probus ® DP, Foundation™ eldbus
or TRL/2 eldbus outputs

Measurement principle

The level of the liquid (or solid) is measured by radar
signals transmitted from the antenna at the tank top.
After the radar signal is reected by the liquid surface
the echo is picked up by the antenna. As the signal is
varying in frequency the echo has a slightly different
frequency compared to the signal transmitted at that
moment. The difference in frequency is proportional
to the distance to the liquid, and can be accurately
calculated. This method is called FMCW (Frequency
Modulated Continuous Wave) and is used in all high
performance radar gauges.

TankRadar Pro uses the 10 GHz frequency band
to get optimum balance between beamwidth and
sensitivity to antenna contamination.

Features

Technical Description

501026En, Ed. 3, Rev E
July 2007

TankRadar Pro

7

TankRadar Pro uses state-of-the art microwave
technology to get highest reliability and precision.
It measures the level of liquids, slurries as well as
many solids. The gauge operates in a wide range
of temperatures, pressures, vapor gas mixtures and
various process conditions.

The applications include:

• Storage tanks at reneries and tank terminals

• LPG storage

• Power plants

• Chemical & petrochemical industry

• Pharmaceutical

• Food and beverage

• Water and sewage treatment

• Hydroelectric power generation and dams

• Cement, powder, wood chips and other solid
material applications

Applications in tanks with agitators require a radar gauge
with TankRadar Pro’s high sensitivity and advanced signal
processing to separate the measuring signal from noise

created by disturbances.

Still-pipe or bridle mounting is recommended for LPG
applications, where the surface sometimes is boiling, and for
some extremely turbulent conditions. The pipe reduces foam
and turbulence and also increases surface reection.

TankRadar Pro parabola and cone versions provide free

propagation, high accuracy level measurement in storage
tanks.

Solid materials, like cement, often give extremely small radar
reections, requiring the most sensitive antenna, the 20”
parabolic.

Applications

TankRadar Pro

Technical Description

501026En, Ed. 3, Rev E

July 2007

Antenna

Tank connection

Weather protection

Electronic housing

Display unit

Junction box Ex (e)

Cable glands

Junction box Ex (i)

8

A TankRadar Pro gauge consists of a Transmitter
Head and a tank connection including antenna.
The Transmitter Head, as well as the electronics
inside, is interchangeable without opening the tank.

Transmitter Head versions

The Transmitter Head is available in four basic
versions:

• Lite
Intended for applications in non-hazardous areas
only. Suitable for tanks without internal structures and
agitators, e.g. certain storage tanks, water, dam
applications etc. The Lite version has FFT calculations
enabled providing an instrument accuracy of

± 10 mm (± 0.4 in.). Echoxer, FHAST™ and MET™

are available as options.

• Standard
For hazardous applications in most tanks (also spheri­cal or bullet tanks, and tanks with internal structures).

The Standard version includes the Echoxer software

which more accurately than standard FFT maps all
microwave interference sources. The Standard
instrument accuracy is ± 10 mm (± 0.4 in.) which can
be improved to ± 5 mm (± 0.2 in.) using the optional
FHAST™ software module.

• Gold

Gold is the most advanced version for difcult

applications in tanks with agitators, heating coils and

other disturbances. It includes the Echoxer software,

FHAST™ software for increased accuracy plus MET™
software for further increased disturbance echo
handling. Instrument accuracy is ± 5 mm (± 0.2 in.).

• Platinum
For high accuracy tank gauging applications, Platinum
is the best TankRadar Pro choice. It includes the
FHAST™ software and selected hardware for
maximum performance. Instrument accuracy is
± 3 mm (± 0.12 in.) for parabolic, still-pipe array and
8-in. cone antennas.

Volume calculation for symmetrical tanks is included
in all versions. Strapping table for non-symmetrical
tanks is available as an option.

Software modules

Various options make it possible to optimize the
gauge for different applications:

• Fast Fourier Transformation (FFT)
Fast Fourier Transformation is a signal processing
technique used to map the echo structure of the tank.

• Echoxer
A software module that makes it possible to measure on
the surface in spite of strong disturbance echoes from

mechanical structures such as agitators and bafes.

• Fast High Accuracy Signal Technology (FHAST™)

A module that improves the efciency of the signal

processing by limiting the region to be analyzed around
the surface. This results in an improved accuracy of
± 5 mm (± 0.2 in.).

• Multiple Echo Tracking (MET™)
Improves the resolution and accuracy in echo disturbed
regions and close to the tank bottom. Continuous
measurement on multiple disturbing echoes facilitates

identication of the actual surface echo.

All software options are possible to upgrade in the

eld without any changes in electronics. Upgrades

are made by entering a new start code in the gauge
and can be done on a temporary basis for trial
purposes.

Software modules in available Pro versions

Explosion

approval

FFT FHAST™

Increased

accuracy

Echoxer

Disturbance

echo handling

MET™
Improved
resolution

Lite - X Option Option Option

Standard X X Option X Option

Gold X X X X X

Platinum X X X Option -

Select the right Pro gauge

Technical Description

501026En, Ed. 3, Rev E
July 2007

TankRadar Pro

4002001000 300-40

60
55
50

40

30

20

10

-1

0

5

798

-15

145

73

0

75239221232 570-40

1

1

2

2

The relation between temperature and maximum pressure
for cone antennas.

The thin antenna plate prevents the

ange from exposure to the tank

environment.

2 in. : 70 (2.76)
3 in. : 95 (3.74)
4 in. : 150 (5.91)
6 in. : 260 (10.24)
8 in. : 370 (14.57)

2 in. : 56 (2.20)
3 in. : 70 (2.76)
4 in. : 93 (3.66)
6 in. : 141 (5.55)
8 in. : 189 (7.44)

200 (7.87)

mm (inch)

400
(15.75)

Temperature (°F)

Temperature (°C)

Pressure (bar)

Pressure (psig)

Quartz
PTFE

2-in. Still-pipe Antenna

TankRadar Pro can be equipped with different

antennas to fulll various requirements. The tank

connection, including antenna, is the only part
exposed to the tank atmosphere. The cone antenna
is most commonly used. When selecting antenna
dimension, it is generally recommended to use as
large antenna diameter as possible.

Cone antenna

The cone antenna is suitable for liquid applications.
It can be used for both free propagation and still-pipe

mounted installations. Thanks to the unique ange
clamp solution the existing tank ange can be used

as tank connection. The gauge can also be delivered
with ange included.

• Standard cone antennas for 3-, 4-, 6- and 8-in. tank
openings. The 3-, 4- and 6-in. cones can be extended

to t long tank nozzles. See pages 24-32, “Ordering
Information”, for standard ange options.

• A 1- and 2-in. version is available together with a
still-pipe solution.

• For larger pipes, use the still-pipe array antennas.

• Materials exposed to the tank atmosphere:
Sealing in PTFE or quartz. Antenna in Stainless
Steel, Hastelloy® C-22, Titanium gr. 2, Monel® 400 or
Tantalum.
O-ring in Viton® uoroelastomer or Kalrez®

peruoroelastomer.

• Special material such as Hastelloy® C-22,
Titanium gr. 2, Monel® 400 and Tantalum.

• Accuracy up to ± 5 mm (± 0.2 in.) using the FHAST™
software option.

• Accuracy with 8-in. cone up to ± 3 mm (± 0.12 in.)
using the Platinum version.

See page 18 for description of still-pipe installations.
For pressure and temperature restrictions depending

on ange and O-ring selection, see page 21.

Antenna versions

9

TankRadar Pro

Technical Description

501026En, Ed. 3, Rev E

July 2007

230

20050

100 150

0

-40

445

392122

212 302

32

-40

10

+0.2

0.5

0.5

-0.2

145

0

+2.9

-2.9

0

5 73

1

1

1

2

2

mm (inch)

440
(17.32)

162
(6.4)

445 (17.52)

200 (7.87)

Temperature (°F)

Temperature (°C)

Pressure (bar)

Pressure (psig)

Welded
Clamped

10

Parabolic antenna

The parabolic antenna is suitable for both liquid and
solid applications. As it has the largest diameter it
has the most narrow radar beam and can be used
for extremely long measuring distances.

The parabolic is also the antenna type most
insensitive to contamination. It can be used in
applications with severe antenna condensation like
asphalt and liquid sulphur.

Two versions are available:
the very easily installed version with clamped

mounting of anges with a 96 mm (3.78-in.) diameter
hole in ange (low pressures) and a welded version

(high pressures).

• Suitable in all tanks with 450 mm (18 in.)
or larger openings.

• Exposed parts in tank: Stainless steel

and FEP/PTFE uoropolymer.

• Best installed accuracy for inventory
applications.

• Highest antenna gain.

• Withstands heavy contamination.

• Flexible PTFE protective cover available for
dusty applications.

• Suitable for long range measurement up
to 100 m (330 ft).

• ± 3 mm (± 0.1 in.) accuracy for platinum
version.

The relation between temperature and maximum pressure for
parabolic antennas.

Parabolic antenna welded to tank opening.

Technical Description

501026En, Ed. 3, Rev E
July 2007

TankRadar Pro

0 20 40 60 80 100

104 140 176 212

120-40

32 68 248-40

0 0

3.6

7.2

14.5

29

0.25

0.50

0.75

1.00

1.25

1.50

1.75

2.00

1

1
2
3

2

3

Pressure (psig)

200 (7.87)

mm (inch)

400
(15.75)

Pro Still-pipe Array Antenna,
xed version.

Pro Still-pipe Array Antenna,
hinged-lid version with
design that enables hand-

dipping.

Hinged Hatch 10 & 12 in.

Temperature (°C)

Pressure (bar)

Hinged Hatch 5,6 and 8 in.
Fixed

Temperature (°F)

11

Still-pipe Array antenna

The Still-pipe Array Antenna with its small-sized
antenna is designed for mounting on existing still­pipes. Typical applications are crude oil tanks with

oating roofs and gasoline/product tanks with or
without inner oating roofs.

The gauge uses a unique patented Low Loss Mode
to transmit the radar waves in the center of the pipe.
This virtually eliminates degradation of the accuracy
due to rust and product deposits inside the pipe.

The Still-pipe Array Antenna is available in two

models, the xed and the hinged-lid version.

The still-pipe must be vertical within 0.5° (0.2 m over
20 m) to obtain highest measurement accuracy.

• Suitable for mounting on existing still-pipes.

• Small-sized antenna for 5-, 6-, 8-, 10- or 12-in.
still-pipes.

• Exposed parts in tank:
Antenna in Polyphenylensuld (PPS).
Sealing in PTFE.
O-ring in Fluorosilicone.
Flange in Acid Proof Steel EN 1.4404
(AISI 316L).

• ± 3 mm (± 0.1 in.) accuracy.

The relation between temperature and maximum pressure for

array antennas.