Endress and Hauser USR30 Radar Sensor User Guide

Endress and Hauser USR30 Radar Sensor User Guide

Sensor unit for distance measurement and level monitoring of liquids and bulk solids

Application

• Continuous distance measurement and level monitoring of liquids and bulk solids
• Maximum measuring range: 35 m (115 ft))
• Ambient temperature: –40 to +85 C (–40 to +176 F)

Your benefits

• Reliable 80 GHz radar sensor
• Precise distance measurement due to strong focus, even in rough environments
• Can be installed in small process connections
• Easy commissioning
• Low power consumption – suitable for battery applications

About this document

Document function

This document contains all the technical data for the device and provides an overview of the device versions that can be ordered.

Symbols used

Safety symbols

Symbols for certain types of information

Symbols in graphics

Function and system design

Measuring principle

The Micropilot is a measuring system, operating based on the time-of-flight method (ToF). It measures the distance from the reference point to the product surface. The radar signals based on the
“Frequency Modulated Continious Wave” (FMCW) principle are emitted by an antenna, reflected off the product surface and received again by the radar system.

Input

Measured variable

Measured process variables

• Level / Distance: 0 to 35 m (0 to 115 ft)

Measuring range

Maximum measuring range: 0 to 30 m (0 to 98 ft) for solids and liquids with permittivity > 1.9
Increased measuring range: 30 to 35 m (98 to 115 ft) for solids and liquids with the following application conditions:

• Only for media with a high permittivity value, such as water.
• No turbulent surfaces
• No increased inhomogeneous atmosphere (increased amount of dust particles, gas phases, high humidity or similar)

Calibration parameter

B Ground
D Measured distance
E Empty calibration (= zero)
F Full calibration (= span)
L Level in %
BD Blocking distance
FD Full distance
ED Empty distance
EL Extended length

Medium

Media: solids and liquids

Usable measuring range for solid applications

The usable measuring range depends on the reflection properties of the medium, the installation position and possible interference reflections.

Measurement of the following media with absorbing gas phase
For example the following media

• Ammonia (pure – 100 %)
• Acetone
• Methylene chloride
• Methyl ethyl ketone
• Propylene oxide
• VCM (vinyl chloride monomer)

To measure absorbing gases, either use a guided radar, measuring devices with another measuring frequency or another measuring principle.

If measurements must be performed in one of these media, please contact Endress+Hauser.

Operating frequency 80 GHz

The operating frequency is for measurement purposes only.

Blocking distance

• No signals are analyzed within the blocking distance (BD)
  For this reason, the blocking distance can be used to suppress interference signals (e.g. from condensate) near the antenna.

• Factory setting: automatic

• The blocking distance (BD) can be set. The set default value is 0 mm.
  The setting is made in the blocking distance parameter.

Sensitivity The sensitivity of the sensor can be configured using a “sensitivity parameter” (high, medium, low).

Output

Output signal

Digital: UART (8N1 inverted)
Baud rate: 230.4 kBd
data bits: 8
Parity: keine
Stop bits: 1
Polarity: inverted (idle low)

Protocol-specific data The USR30 has the following read and write parameters:

Power supply

Supply voltage The radar system requires 2 supply voltages:
Sensor: 3.2 to 5.5 VDC
Digital interface: 1.7 to 3.6 VDC

Power consumption

~32 mW static
~1000 mW peak for < 10 ms during measurement

Connection of the sensor

The connection of the sensor is described in the documentation “USR30 Customer Manual” (see Supplementary documentation  ä 12)

Performance characteristics

Reference operating conditions

• Temperaturr = +24 C (+75 F) ±5 C (±9 F)
• Pressure = 960 mbar abs. (14 psi) ±100 mbar (±1.45 psi)
• Humidity = 60 % ± 5 %
• Reflector: metal plate with a diameter ≥ 1 m (40 in)
• No major interference reflections inside the signal beam

Maximum measured error

• Accuracy for liquids applications: ±2 mm (±0.08 in) within the entire measuring range
• Accuracy for bulk solids applications: ±10 mm (±0.39 in) within the entire measuring range (higher measuring accuracy optionally possible)

The reference condition for the accuracy refers to the setting Medium type = Liquid.

Influence of ambient temperature Temperature coefficient: ≤ 4 mm (0.16 in) per 10 K

Installation

Mounting instructions

• Mount the end measuring device in a horizontal position so that it is parallel to the tank ceiling.
  Otherwise, undesired reflections from the surroundings can cause interference signals.

• The radar antenna should never be covered by metal objects

• Do not mount any objects which may cause interference, such as tank internal fittings, grids or agitators, below or in the direct vicinity of the radar (see the graphic below)

Maximum nozzle height and distance to wall

1. The beam angle is 8°

Beam angle 8°

Environment

Process

• Measurement directly through the tank only possible for electrically non-conductive tank walls with low dielectric constant and small wall thickness
  No contact is made with the process medium.

Mechanical construction

Integration into an overall system

It is not allowed to modify the sensor module in any way or form. The sensor must be used with the antenna provided.

Characteristics

• Simple mechanical/electrical integration into an end device
• Configuration and control via widely used digital interface (UART) with defined command set (see Customer Manual)
• Startup time: <250 ms until first measurement can be performed
• Measurement cycle time: <100 ms

Integration

• The sensor must be installed inside a closed housing.
• A minimum distance of >2mm to any mechanical part has to be left around and above the PCB as to not interfere with any signals of the sensor.
• The signal cone must not be obstructed by any elements of the housing or add ons.
• The electrical connection must be done through the provided connector (see Customer Manual for pin description). A fitting counterpart connector with a locking mechanism must be used.
• After mounting in a housing, a functional check and zero offset calibration has to be performed.
  The zero plane can be defined by the customer.

• Is the sensor undamaged (visual inspection)?
• Is the sensor properly mounted and fixed in position?
• Is the antenna and housing properly sealed?
• Is the sensor signal cone unobstructed?
• Is the electrical connector properly fitted and locked?
• Is the sensor responsive and returns a correct measurement value without any communication errors or active error bits?

Certificates and approvals

NOTICE

The USR30 radar sensor is a sensor unit that is installed as a component in the customer’s end system. It is therefore the customer’s responsibility to obtain the relevant approvals for his end device / measuring system.
Endress+Hauser’s closed measuring systems that include this sensor unit comply with the following guidelines:

As a general rule, the requirements outlined in EN 302729-1/2 must be observed.

FCC

§ 15.19 Labeling requirements:
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may cause undesired operation.
§ 15.21 Information to user:
Caution! Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

Industry Canada

This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canada’s licence-exempt RSS(s). Operation is subject to the following two conditions:

1. This device may not cause interference.
2. This device must accept any interference, including interference that may cause undesired operation of the device.

Compliance procedure of host device:

The final host device, into which this modular approved transmitter is finally integrated has to comply itself to the appropriate technical requirements (typically §15.107 AC Powerline Conducted Limits, §15.109 Radiated Emission Limits for an Unintentional Radiator) and apply applicable FCC Equipment Authorization Procedures (SDoC or Certification).

The installer/user of this device shall ensure that it is at least 10 km from the Dominion Astrophysical Radio Observatory (DRAO) near Penticton, British Columbia. The coordinates of the DRAO are latitude 49°19ʹ15ʹʹ N and longitude 119°37ʹ12ʹʹ W. For devices not meeting this 10 km separation (e.g., those in the Okanagan Valley, British Columbia,) the installer/user must coordinate with, and obtain the written concurrence of, the Director of the DRAO before the equipment can be installed or operated. The Director of the DRAO may be contacted at 250-497-2300 (tel.) or 250-497-2355 (fax). (Alternatively, the Manager, Regulatory Standards Industry Canada, may be contacted.)

Host devices marketed to Canada are typically subject to ICES-003 Information Technology Equipment (including Digital Apparatus) and the SDoC procedure.

This modular approved transmitter is tested and certified as stand-alone device under FCC §15.256 “Operation of level probing radars within the bands 5.925–7.250 GHz, 24.05–29.00 GHz, and 75–85 GHz” and ISED RSS-211 – Level Probing Radar. When the module is integrated into the final host device, the integrator has to repeat the Fundamental Field Strength and Out-of-Band Emission measurements to assure compliance with the

FCC/ISED requirements of the radar module when operating inside the host device.

If the host device contains itself a transmitter, the device has to be fully tested and certified under the applicable FCC rule part / ISED RSS-standard. In addition, simultaneous transmission compliance measurements are required to assure that the device complies with the FCC / ISED requirements having all transmitters operational (FCC Multi-transmitter Policy). This also applies when multiple certified RF Modules are integrated in addition to the level probing radar.

Labelling Requirements of Host device:

When this modular approved transmitter is integrated into a final host device, host devices marketed in the US has to be permanently labelled with “Contains FCC ID: LCGUXR3XYEL”.

Furthermore, the host device has to comply with the §15.19 Labelling requirements.
For host devices marketed to Canada “Contains IC: 2519A-YEL” shall be affixed accordingly.

FCC §15.256 (a)~(e) and RSS-211 Section 6. User Manual apply to the Host Device.
The final host device with the integrated level probing radar complies with the FCC / ISED RF exposure requirements for an uncontrolled environment, when fixed installed by trained installers.

Other standards and guidelines EN 61010-1

Explanations and supplementary documentation

Supplementary documentation

For an overview of the scope of the associated Technical Documentation, refer to the following:

• USR30 Customer manual

Disposal

As required by the Directive 2012/19/EU on waste electrical and electronic equipment (WEEE), our products are marked with the depicted symbol in order to minimize the disposal of WEEE as unsorted municipal waste. Such products may not be disposed of as unsorted municipal waste and can be returned to Endress+Hauser for disposal under the conditions stipulated in the General Terms and Conditions or as individually agreed.

Contact addresses

Internet: www.sensors-components.endress.com
E-mail: sensors-components.ehlp@endress.com

References

• Kundenspezifische Sensoren für OEM | Endress+Hauser - Customized Pressure Sensors and Components
• Kundenspezifische Sensoren für OEM | Endress+Hauser - Customized Pressure Sensors and Components

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