HyQuest Solutions WLR 8 Bedienungsanleitung

WLR 8/15/30

User Manual

Table of Contents

Disclaimer 3I

II Glossary + Abbreviations 4

III Safety Instructions 5

Part I Introduction 6

Part II Installation 7

2.1 Rain and Wind ................................................................................................................................................... 8

2.2 Interference and Multiple Radars ............................................................................................................... 8

2.3 Interference with Fog and Evaporation .................................................................................................... 9

2.4 Reflections ......................................................................................................................................................... 9

Part III Configuration (formerly Radar Configurator Utility) 10

Part IV Repair 12

Part V Technical Data (formerly Electrical Characteristics) 13

Part VI Obligations of the Operator and Disposal 14

6.1 Obligations of the Operator ....................................................................................................................... 14

6.2 Dismantling / Disposal ................................................................................................................................ 14

Part VII Appendices 16

7.1 Connector Pin-Out ......................................................................................................................................... 17

7.1.1 SDI-12 Interface ..................................................................................................................................... 19

7.1.2 Serial RS-485 Interface ........................................................................................................................ 19

7.1.3 Serial RS-232 Interface ........................................................................................................................ 19

7.1.4 Analogue 4-20 mA Output ................................................................................................................... 19

7.2 Data Interface ................................................................................................................................................ 20

7.2.1 SDI-12 ........................................................................................................................................................ 20

7.2.2 Serial RS-485 Interface ........................................................................................................................ 21

7.3 Data Protocols ................................................................................................................................................ 21

7.3.1 SDI-12 protocol ....................................................................................................................................... 21

7.3.2 Servicing protocol (RS-232) ................................................................................................................ 24

7.3.3 Modbus RTU protocol (RS-485) .......................................................................................................... 26

7.4 Mechanical Drawing ..................................................................................................................................... 33

reproduced in any form or by any means without the

written permission of the publisher. HyQuest

Solutions waives copyright for users to print out

parts of the documentation in hard copy for their

own use only.

Trademark Notice: HyQuest Solutions (HS) and

KISTERS products and services referred to in this

document are trademarks or registered trademarks

of HyQuest Solutions or KISTERS AG. Other product

names used may or may not be the trademarks of

their respective owners.

Company. Any rights not expressly granted herein

are reserved.

The information provided in this manual was deemed

accurate as of the publication date. However, updates

to this information may have occurred.

This manual does not include all of the details of

design, production, or variation of the equipment

nor does it cover every possible situation which may

arise during installation, operation or maintenance.

HyQuest Solutions shall not be liable for any

incidental, indirect, special or consequential damages

whatsoever arising out of or related to this

documentation and the information contained in it,

even if HyQuest Solutions has been advised of the

possibility of such damages.

Any errors found in any HyQuest Solutions product

should be reported to HyQuest Solutions where

every effort will be made to quickly resolve the

problem.

This document is public.

I Disclaimer

II Glossary + Abbreviations

Term

Definition

See antenna 3 dB beam width

Antenna 3 dB Beam

Width

also known as the half-power; the angle between the half-power of an antenna pattern or

beam over which the relative power is at or above 50% of the peak power

bps

bits per second, a measure for data transmission speed

CWFM Radar

continuous-wave frequency-modulated radar

Dead Zone

Equivalent to blocking distance or dead band, defines the minimum distance between water

surface and sensor antenna that is needed to measure precisely (a function of the radio wave

frequency)

ERP

Effective Radiation Power, IEEE standard definition of directional radiofrequency (RF) power

EIRP

Equivalent Isotropically Radiation Power, hypothetical power of an isotropic antenna with

equivalent signal strength of the actual source antenna in the direction of the strongest beam

GHz

See Hz

(GHz)

International Standard System of Units derived unit of frequency, Hertz (symbol: Hz)

GHz: a gigahertz is the multiple of the hertz frequency equivalent to 109Hz

GND

Ground, electrical ground or signal ground

Mx, Mxx

ISO standard for metric screw threads w/ M=metric, x or xx = outer diameter in millimeters

Radio Frequency

RxD

Data reception line

TxD

Data transmission line

W Band

Frequency band in the microwave range of the electromagnetic spectrum, typically 75..110

GHz

WLR 8/15/30

Water Level Radar w/ measurement range relative to water surface of

8 m (26,24 ft)

15 m (49,2 ft)

30 m (98,4 ft)

Read the user manual including all operating instructions prior to installing, connecting and powering up the HyQuest

Solutions WLR 8/15/30. The manual provides information on how to operate the product. The manual is intended to

be used by qualified personnel, i.e. personnel that have been adequately trained, are sufficiently familiar with

installation, mounting, wiring, powering up and operation of the product.

Keep the user manual on hand for later reference!

If you encounter problems understanding the information in the manual (or part thereof), please consult the

manufacturer or its appointed reseller for further support.

HyQuest Solutions WLR 8/15/30 is intended to be used in hydrometeorological or environmental monitoring

applications.

Before starting to work, you have to check the functioning and integrity of the system.

Check for visible defects on the WLR 8/15/30, this may or may not include any or all of the following mounting

facilities, connectors and connections, mechanical parts, internal or external communication devices, power

supplies or power supply lines, etc.

If defects are found that jeopardize the operational safety, work must be stopped. This is true for defects found

before starting to work as well as for defects found while working.

Do not use the HyQuest Solutions WLR 8/15/30 in areas where there is a danger of explosion.

The present user manual specifies environmental/climatic operating conditions as well as mechanical and electrical

conditions. Installation, wiring, powering up and operating the HyQuest Solutions WLR 8/15/30 must strictly comply

with these specifications.

Perform maintenance only when tools or machinery are not in operation.

If guards are removed to perform maintenance, replace them immediately after servicing.

Never make any electrical or mechanical diagnostics, inspections or repairs under any circumstances. Return the

sensor to the manufacturer’s named repair centre. You can find information on how to return items for repair in the

relevant section of the HyQuest Solutions web site.

Disposal instructions: After taking the HyQuest Solutions WLR 8/15/30 out of service, it must be disposed of in

compliance with local waste and environmental regulations. The HyQuest Solutions WLR 8/15/30 is never to be

disposed in household waste!

Inputs and outputs of the device are protected against electric discharges and surges (so-called ESD). Do not

touch any part of the electronic components! If you need to touch any part, please discharge yourself, i.e. by touching

grounded metal parts.

Specific Safety Instructions

The manual provides information on how to operate the sensor system.

Protect the power supply connection with a fuse (2.5 A fast blow fuse). For cable length exceeding 40 m (131.2 ft),

surge protection shall be integrated.

Please refer to the EIRP power listed in this manual. Note that the main orientation of the sensor is: downward-looking

with the core radar beam oriented downwards, installation location must be chosen to avoid the beam is oriented

towards living species. The device is designed for use in fixed installation. Mobile applications are not within the scope

of the sensor.

European Union and European Economic Area: The national implementation of the framework directive 89/391/EEC

and corresponding individual directives, in particular the directive 2009/104/EEC concerning the minimum safety and

health requirements for the use of work equipment by workers at work (incl. amendments) must at all times be

observed and adhered to.

USA-FCC Approval: The equipment has been tested and found compliant with specifications and limits of Class A digital

devices, pursuant to Article 15 of FCC rules. FCC limits ensure electromagnetic compatibility, i.e. a design providing

reasonable protection against electromagnetic interference. The HyQuest Solutions WLR 8/15/30 is a device emitting

radio frequency. It must be installed and operated in compliance with the User Manual. Non-respect of the stipulations

of the manual may result in interference with radio communication devices. When installed in developed areas, a risk

of harmful interference exists and it is up to the user to provide necessary measures to limit these interferences at his

own expense. Respect of Local Legislation: Users must confirm with local legislation. This may or may not include the

need to apply and obtain a permission to install a radar sensor. In such a case all provisions of the permission must be

observed by the user. Other local/national legislation that must be observed where required concerns any or all of the

following topics: safety at work and personnel safety, environmental protection, health issues, electromagnetic

compatibility, waste (disposal of products and materials).

III Safety Instructions

Introduction

1Introduction

Thank you for choosing our product. We hope you will enjoy using the device.

HyQuest Solutions manufactures, sells, installs and operates quality instrumentation, data loggers and communication

technology. Products are designed with passion for environmental monitoring and with a deep understanding of the

quality, accuracy and robustness needed to fulfil the requirements of measurement practitioners in the field.

The present User Manual will help you understand, install and deploy the device. If, however, you feel that a particular

information is missing, incomplete or confusing, please do not hesitate to contact us for further support!

HyQuest Solutions’ WLR 8/15/30 is a highly accurate radar level sensor that measures the distance from the sensor to the

surface. It uses advanced 80 GHz radar technology to provide accurate and stable measurements. Using contactless

technology for measurement of level of fluids and solids provides many advantages over traditional methods due to

simple installation, low power consumption and minimal to no maintenance.

Installation

2Installation

The level meter must be installed above the water surface, pointing directly towards the water surface. Please read the

following carefully and respect these instructions and recommendations as much as possible to obtain the best

measurement results.

Minimum Installation Height above Water Surface: 0.1 m (0.33 ft), recommended > 1 m (3.28 ft)

Maximum Installation Height above Water Surface: <= max measurement range of the device

Sensor should be directed at a 90° angle towards the water.

Caution:

Direct non-obstructed line of sight between sensor antenna and the water surface

Avoid object in the vicinity of the sensor: may reduce accuracy, introduce offsets

Reduce vibrations of the mounting structure: affects measurements

Ensure water surface direct below the sensor is clear of: vegetation, rocks, sand deposition, other obstacles.

The sensor applies an algorithmic correction to detect and eliminate obstacles from the distance measurement

signal spectrum. However, the correction has limits. Vibrations can further limit the effectiveness of the algorithm.

The figure below shows how the radar should be positioned relative to the water surface.

Figure 1 – Water Level Radar (WLR) Installation

The height measurement works best when water surface is calm (not too wavy) as flat surfaces better reflect radar beams.

In applications with continuous/frequent highly turbulent water, the length of the radar filter can be adjusted to filter out

most, if not all the turbulences.

Slight up to moderate surface waviness will affect reflected signal level (reducing Signal to Noise Ratio SNR), but is

unlikely to affect measurement accuracy.

Strong turbulent flow with high water waviness will reduce accuracy due the unpredictability of the water surface. The

averaging effect across the area covered by the radar beam will reduce oscillations.

Instrument radar beam covers a circular area on the water surface. The radar beam has a 3-dB width angle, subsequently

the diameter of the pattern on the water surface depends on the distance of the water surface to the instrument. See

Table 3 for pre-calculated pattern dimension.

Installation

Height [H]

0.3 m (0.33 ft)

0.06 m (0.2 ft)

9 m (29.52 ft)

1.89 m (6.2 ft)

0.5 m (1.64 ft)

0.11 m (0.36 ft)

10 m (32.8 ft)

2.10 m (6.89 ft)

1 m (3.28 ft)

0.21 m (0.69 ft)

11 m (36.08 ft)

2.31 m (7.58 ft)

2 m (6.56 ft)

0.42 m (1.38 ft)

12 m (39.36 ft)

2.52 m (8.27 ft)

3 m (9.84 ft)

0.63 m (2.07 ft)

13 m (42.64 ft)

2.73 m (8.95 ft)

4 m (13.12 ft)

0.84 m (2.76 ft)

14 m (45.92 ft)

2.94 m (9.64 ft)

5 m (16.4 ft)

1.05 m (3.44 ft)

15 m (49.2 ft)

3.15 m (10.33 ft)

6 m (19.68 ft)

1.26 m (4.13 ft)

20 m (65.6 ft)

4.20 m (13.78 ft)

7 m (22.96 ft)

1.47 m (4.82 ft)

25 m (82 ft)

5.25 m (17.22 ft)

8 m (26.24 ft)

1.68 m (5.51 ft)

30 m (98.4 ft)

6.30 m (20.66 ft)

Table 1 – Approximated Height-Dependent Circular Radar Beam Pattern Dimension (Water Surface)

Rain and Wind

Interference and Multiple Radars

Interference with Fog and Evaporation

Reflections

2.1 Rain and Wind

WLR 8/15/30 instruments has integrated internal software filters to filter out effects of rain, fog or wind for radar

distance sensor. These filters however have some limitations. Majority of measurement inaccuracies caused by

environmental factors can be solved by proper sensor installation.

For rain and snow suppression, the most effective solution is to mount the radar so that it points directly at water. As rain

or snow fall, they affect the water surface, so it isn’t as reflective as usually, thus reducing the SNR. However, our devices

are tested and calibrated in a way, so they detect the surface even under heavy rainfall.

Influence of the wind on the accuracy is in most cases small and can be neglected. The only exception is strong wind as it

will create surface waves and turbulences which can be detected as a shift in level. As mentioned above, length of radar

filter can be adjusted to compensate for this.

2.2 Interference and Multiple Radars

Distance measurement radar is operating in W-band from 77 GHz to 81 GHz with linear frequency modulation,

modulating signal continuously in the mentioned frequency range. To get interference between two or more sensors it

will be required to keep central frequencies very precise just like in surface velocity radar and additionally timing

synchronization of radar should be kept in range of 25 ns to each other. Such synchronization is very complex to achieve

so the interference probability between several radars on the same location is very small.

It is possible that some wideband radiation sources can introduce small and impulse interference for the short period of

time, but this should not, or it is very unlikely to affect measurements reported by radar sensor.

Installation

2.3 Interference with Fog and Evaporation

Generally, radar sensors are not affected by fog or evaporation of water unless very heavy evaporation is present and

water density in the air is very high.

The best solution for the distance measurement is in most cases to increase average period to get better average distance

value. As evaporation is naturally very turbulent event with significant difference in density over the surface area and in

time, averaging of the distance measurement spectrum is solving the problem of accuracy in such conditions.

2.4 Reflections

Water is very reflective medium for the radar waves and most of the power transmitted from radar transmitter will be

reflected from the water surface. Reflections of the radar transmitted power beam follow the same physical laws as in

optics and every time radar beam hits the surface part of the power is reflected away from the radar, part of the power is

reflected towards the radar and only a small part of power is absorbed by the water. Depending on the surface

roughness and incident angle ratio between power reflected in the direction away from the radar and direction back

towards the radar can significantly vary. As incident angle for radars in fixed, only the roughness is determining the

ration in our case.

In the case of level meter where incident angle of transmitted radar beam to the water is around 90° most of the power is

reflected to the sensor and only small portion of the transmitter power will be dispersed in all directions. Ratio between

power reflected to the sensor and power dispersed in all directions is dependent on the surface roughness but in general

it is very small amount of the energy that is dispersed, and it is very unlikely that dispersed energy will cause additional

multipath problems due to the more reflections from surrounding objects.

Configuration (formerly Radar Configurator Utility)

3Configuration (formerly Radar Configurator Utility)

HyQuest Solutions provides a user-friendly PC application to configure WLR Water Level Radars. Additionally, the

Configurator Utility displays current level readings.

When started, the Configurator Utility displays its main window. Initially, no level data is displayed, as the connection to

the level meter device is not established.

Figure 2 – Level Meter Configurator main window

To connect the Configurator utility with the level meter, connect your PC to the radar using an RS-232 serial cable

connection. Then, select the Radar à Connect menu option in the Configurator Utility, and choose the appropriate COM

port number. The Configurator will try to establish a data link between your PC and the level meter device. After the data

link is established, active device parameters will be displayed, and the level measurements will be displayed:

Figure 3 – Configurator main window with device connected

The utility window is divided into two panes, that can be manually re-arranged. The first panel (at the left part of the

screen) is the Radar Module Info pane that displays the radar level meter information and operating parameters. Some of

these parameters can be changed by editing the values directly inside the Radar Module Info pane. The following

information is displayed:

Firmware version

the version of the firmware running in the radar sensor

device

Level correction

correction in meters to be added to the detected level

Dead zone minimum

minimum detected distance

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