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High accuracy Radar gauging for marine & industrial applications

Intelligent Radar Transmitter

employing FMCW Technology

 

 

 

Benefits at a glance

Non-contact radar measurement

4-20mA output

Choice of antenna types

Hart, Modbus, Profibus interface options

Accurate to 5mm on ranges up to 30 metres with 2mm repeatability

9.9GHz Quartz controlled all digital processing

PLL- stabilised FMCW X-band antenna.

 

PSM can now offer RADAR level gauges to provide the very best accuracy for the monitoring of storage & process tanks in both the industrial & marine sector.

This all new gauge utilises the very latest in FMCW technology developed from the Military sector to offer non-invasive measurement of level at a competitive price.

The iRT is a cost effective level sensor designed for continuous non-contact level measurement

The primary head unit is mounted to a standard tank flange fitting. and can be removed under service conditions.

For long-distance transmission of level data, various standard communication interfaces (4 to 20mA, HART, MODBUS, PROFIBUS) are available for connection to plant control systems.

The primary head can also accept up to 4 additional 4-20mA input signals, for example from temperature and/or pressure transmitters. These are then retransmitted via the chosen digital output.

Communications

Various output standards are available to suit application requirements HART MODBUS PROFIBUS

Specification

System structure

Operating mode

Quartz-controlled dynamic PLL-stabilised FMCW radar in the X band (8.5 – 9.9 GHz) with digital signal processing; compact & modular design

Measured quantities

Primary quantity: distance; derived quantities: level, volume

Measuring range

Maximum measuring range: 30 m (100 ft)

Blocking distance

Minimum 0.2 to 0.5 m (0.65 to 1.6 ft),

Rate of change in level

£ 10 m/min (£ 33 ft/min)

Measured product conditions

Physical properties

Generally the product should have a relative permitivity of 3 or greater (er < 3) For er ³ 1.5 the product is still well recommended with application profiling.

Process temperature

Unrestricted but be aware of ambient and flange temperatures

Operating pressure

Cone antenna: -1 to +10 bar.

Component parts

Housing options

Epoxy coated cast aluminium. Optional— Stainless Steel DIN 1.4581 and ANSI 316 Ti.

Flange system and antenna

Stainless Steel 1.4435 (316 L) / PTFE

Gaskets

FFKM (Kalrez 4079); Kalrez 2035; Viton (FPM); PTFE is also in contact with the product in all versions

Process connection

Cone antenna

BS 4504-3.3:1989, BS1560-3.1:1989

ANSI B 16.5

DN 50 to DN 200, PN 6 to PN 64;

2” to 8”, 150/300 lb/RF

Rod antenna

Refer to separate data sheet

Electrical connections

Cable entries: M 25 x 1.5

Terminals: 0.5 – 2.5 mm2 (solid conductor: max. 4 mm2 )

Ambient conditions

Hazardous locations

BASEFA EEx d IIB T4, Zone 0, 1, 2 (EN50014, EN50018 Europe) - Pending

Type Approval

Lloyds Register - Pending

EMC

By design, EN 50081-1 Conducted and EN 50082-2 Radiated.

Protection category EN60529/IEC529

IP 67 to DIN 40050 / IEC 144

Shock resistance

Impact test to EN 61010, Sect. 8.2 with 0.5 J energy; drop test to prEN 50178

Vibration endurance limit

By design, IEC 68-2-6 and prEN 50178 (10-57Hz: 0.075mm / 57-150Hz: 1g) and possibly 1mm amplitude at 2-13.2 Hz / 0.7g acceleration at 13.2-100Hz

Salt spray test

3 week duration

Ambient temperature at signal transducer

Cone antenna: –20°C to +55°C (-24°F to +131°F)

Functional range: -40 °C to +170°C (-40°F to +158°F)

Flange temperature

Cone antenna (T ambient £ 50°C (122°F)): -20°C to +150°C (-22°F to +284°F)

Climate

Optional integral 10 watt electronics heater element.

Operator interface

Operator interface language

English

Units of measurement

Lengths: m, cm, mm, inch, ft, %,

Volume: m3 , Litre, US Gal, GB Gal, ft3, bbl, %

Conversion unit: any text

Power supply

24V ACDC

Standard: 18 – 31.2 V DC or 18 – 26.4 V AC (47-63 Hz)

Universal (115/230 V AC)

Optional: 100-240 V AC (tolerance: 85-264 V AC); 47-63 Hz

Power consumption

Typically 8.9W / 12.2VA

Current inputs

Additional inputs may be multiplexed meaning fewer cables are required on the vessel's deck.

Type

4 x Current input, active or passive

Current range

0(4)-20mA

Accuracy/linearity

0.5% (rel. 20 mA; 25°C/77°F)

Temperature drift

£ 300 ppm/K (typically 70 ppm/K)

Load

50 W (current), 10 kW (voltage)

Relay output

Switching output (optional)

Nominal switching capacity (resistive load): 1 A 30 VDC, 0.3 A 125 VAC; On resistance £ 20 W; floating

Failure signal

Current output

error signal: 2 mA (Exi = 3.6 mA)

Switching contact

contact opens or closes

Digital interfaces

error flags

Measuring accuracy

Error of measurement

max. +/- 5mm (+/- 0.2”) or 0.1%

Repeatability

£ 0.5 x error of measurement

Measured-value resolution

1 mm (0.04”)

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The iRT is a registered design. All rights reserved 2003
Information in this document is subject to change without notice.
Other products and companies referred to herein are trademarks or registered trademarks of their respective companies or mark holders.

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