Lambrecht aem ARCO-SERIAL User manual

USER MANUAL
Wind Sensors
ARCO-SERIAL and ARCO-NAV
ARCO

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Content
1 Warranty 3
2 Disposal 3
3 Introduction 4
4 Start-up 4
4.1 Installation conditions 4
4.1.1 General 4
4.1.2 Ships 5
4.2 Tools and installation material 5
4.3 Unpacking the sensor 5
4.4 Incoming inspection 5
4.5 Power supply 6
4.6 Mounting the cup rotor on the wind speed sensor 6
4.7 Installation work (brief description) 6
4.8 Mounting the sensor 6
4.8.1 Adjusting the wind vane 7
4.8.2 Power supply and signal cable 7
4.8.3 Safety regulations 8
5 Maintenance 8
5.1 Regular maintenance and calibrations 8
5.2 Visual inspections and cleaning work 9
6 Transports 9
7 Data protocols 9
8 Dimensional drawings ARCO-SERIAL and ARCO-NAV 10
9 Electrical connections ARCO-SERIAL and ARCO-NAV 11
10 Technical data 12

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ARCO-SERIAL and ARCO-NAV
COMPACT AND EXTREMELY ROBUST WIND/SHIP SENSOR
ARCO-SERIAL for measuring wind direction and wind speed
ARCO-NAV for measuring wind direction and wind speed, especially on ships
1 Warranty
Please note the loss of warranty and non-liability by unauthorized manipulation of the system. You need a written
permission of the LAMBRECHT meteo GmbH for changes of system components. These activities must be
operated by a qualied technician.
The warranty does not cover:
1. Mechanical damages caused by external impacts (e. g. icefall, rockfall, vandalism).
2. Impacts or damages caused by over-voltages or electromagnetic elds which are beyond the standards and
specications in the technical data.
3. Damages caused by improper handling, e. g. by wrong tools, incorrect installation, incorrect electrical
installation (false polarity) etc.
4. Damages which are caused by using the device beyond the specied operation conditions.
2 Disposal
LAMBRECHT meteo GmbH is listed and registered at the Stiftung Elektro-Altgeräte Register ear under:
WEEE-Reg.-Nr. DE 45445814
In the category of monitoring and control instruments, device type: “Monitoring and control instruments for
exclusively commercial use”.
Within the EU
The device has to be disposed according to the European Directives 2002/96/EC and 2003/108/EC
(Waste Electrical and Electronic Equipment). Do not dispose the old device in the household waste!
For an environmentally friendly recycling and disposal of your old device, contact a certied disposal
company for electronic waste.
Outside the EU
Please follow the regulations in your country regarding the appropriate disposal of waste electronic equipment.

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3 Introduction
The sensors of the ARCO family are very robust, compact, and extremely reliable. When developing these sensors
particular consideration has been given to the fulllment of meteorological requirements. The system acquires
the horizontal air ow and processes the measuring data to the meteorological parameters wind speed and wind
direction. The sensors and further system components are mounted in a splash water resistent and dustproof metal
housing. The measuring data are automatically transmitted via serial interface RS 485 in talker mode, when the power
supply is switched on.
Due to their shock and vibration proof construction the sensors ARCO-SERIAL and ARCO-NAV are particularly
qualied for use under severe environmental conditions. The housing and the measuring elements are made of
seawater resistant aluminium alloys. The housing, the cup rotor, and the wind vane are anodized; the housing of the
ARCO-NAV is lacquered white (RAL 9003). An electronically controlled sensor heating device allows for operation of
the sensor over the wide range of -30 to +70 °C.
4 Start-up
Wind can be represented by a vector quantity. For a complete description of the wind it is necessary to specify its
speed and direction. The two components are subject to spatial and temporal variations; thus, strictly speaking, the
values are only valid for the site where the measuring instrument is installed. We therefore recommend selecting the
place of installation very carefully.
4.1 Installation conditions
4.1.1 General
For professional wind measurements the location and height of the wind sensor are important for accurate, correct
results and representative wind conditions. Ideally, the sensor should be installed 10 m above the ground on a mast.
There should also be nothing aecting wind ow within a radius of 150 m around the sensor. This may be buildings,
trees, tall towers, lifting cranes, moving vehicles, aircrafts, helicopters or other obstructions. In the case of mobile
measurements on vehicles often the above mentioned conditions are not practicable. Then you have to nd
compromises.
Generally, wind measuring instruments should not measure the specic wind conditions of a limited area, but
indicate the typical wind conditions of a wider area. The values measured at dierent places must be comparable.
Thus, when installing the sensor you should make sure the place of installation is not under the lee of great obstacles.
The distance between the obstacles and the sensor should be 10 times the height of the obstacles (this corresponds
to the denition of an undisturbed terrain). If an undisturbed terrain of this kind does not exist, the sensor must be put
up at a height of at least 5 m above the obstacle height.

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If the sensor must be installed on a roof top, the place of installation must be in the middle of the roof to avoid
predominant wind directions. If you want to measure both wind direction and wind speed, if possible, the sensors
should be mounted at the same measuring point, with any mutual interference of the sensors being avoided. The
wind sensors ARCO-SERIAL and ARCO-NAV easily meet this requirement.
The sensor must not be installed on to, or close to transmitting plants or antennas. A minimum distance of 2 m
is to be kept for interference-free signal transfer.
4.1.2 Ships
For operation on ships you should select a mounting place with little interference from obstacles such as masts,
antennas, and chimneys. In most cases the wind sensor will be mounted on the ship’s highest mast.
For wind measurements on board of ships, the location and height of the wind sensor are important for
representative and accurate measuring results. The sensors should be ideally located on the top of the
mast, without any inuence from obstacles. If this is not possible, the sensors should be installed on a mast
traverse of at least 1.5 m length, on the port side of the ship.
4.2 Tools and installation material
There are no special tools or materials required for installation or maintenance. All work can be carried out with
standard tools available in a regular workshop.
4.3 Unpacking the sensor
The sensor is packed in a separate box, carefully protected against mechanical inuences, in order to avoid damage
during transport. When securely installed, the sensor can withstand shock and vibration, which normally occurs on
ships. Please verify that the following parts and documents are enclosed:
• Wind sensor ARCO
• User manual
Accessories: (depending on order size, packed separately)
Connection cable with cable plug and cable core ends
4.4 Incoming inspection
Please thoroughly check the delivery with regard to completeness and eventual transport damages. In case of
eventual claims please contact us in writing immediately.

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4.5 Power supply
The wind sensor requires at the input connector a 24 volt nominal DC power source for operation. The sensor heating
has to be supplied with 24 volt DC and has a power consumption of 2.9 W.
4.6 Mounting the cup rotor on the wind speed sensor
The bores at the cup rotor are provided in such a way
that the cup rotor can only be installed in a certain, clear
position. In each case all screws must be used to attach
the cup anemometer and wind vane. Thus the correct
direction of rotation is guaranteed. The necessary wrench
is included in the delivery.
4.7 Installation work (brief description)
The installation of the sensor involves 3 steps:
1. Mounting the cable on the sensor and if necessary drawing the cable through the mast.
2. Mounting the sensor on the mast, but before tightening the screws you must align the sensor to the north.
3. Attaching the cable to the power supply and the signal acquisition system.
4.8 Mounting the sensor
The wind sensor can be installed on a standard pipe with an outer diameter of 50 mm and an inner diameter of at
least 40 mm. Before attaching the unit with the two 8 mm socket screws, the cable must be connected, by drawing it
through the pipe and the sensor aligned to the north or in the forward driving direction. For this purpose the housing
is marked accordingly (see drawing). Adjust the sensor to the north before tightening the screws.
Please make sure that the sensor is rmly attached to the mast!
1Schraube mit Innensechskant
screw with hexagon socket
M3x12 DIN7380
2Windfahne / wind vane
3Windfahnenglocke / wind vane protective globe
4Skt-Stiftschlüssel / hex head wrench
4
1
2
3

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4.8.1 Adjusting the wind vane
For wind direction measurements the north mark on
the sensor must be aligned with the geographical north
direction. To adjust the wind sensor in a rm and correct
manner into the north direction this item is equipped with
an integrated mounting aid. Inside the inner bottom of the
sensor a small bolt pointing to the north is integrated to
be set into a corresponding slot of the mounting pipe (if
available). Thus the sensor is safely attached. If needed
you can screw or unscrew the pin by means of an allen
key. You have to turn the marking on the wind vane so that
it is exactly over the marking on the sensor shaft. Fix the
position of the wind vane with, for example with a piece of
adhesive tape. After alignment the adhesive tape has to
be removed.
When you have xed the wind vane you can locate the reference point by aiming at it over the axis. Now you must turn
the sensor casing on the mounting tube until the tip of the wind vane points to the reference point in the north. To set
up the sensor’s north orientation select a landmark which is as far as possible up north with regard to the nal position
of the wind direction sensor.
The reference point can be selected using a topographical map (1:25000). The exact position of the reference point
is determined using an amplitude compass that can be adjusted horizontally on a stand.
The compass declination has to be considered!
To align the sensor in a forward direction (on ships) locate a point outside the ship in the landscape which is located in
the ship’s forward direction respectively in the centre line or, in the case that the sensor is mounted far away from the
middle line, a line parallel to the centre line. The sensor can be fastened by means of the two hexagonal screws when
the tip of the wind vane points to the northern reference point. Finally the earth screw has to be connected to the
ship’s ground. Acid-free contact grease is recommended to protect contact surfaces against corrosion. A functional
check at three points oset by 90° directions is recommended.
Follow all relevant safety instructions when mounting a sensor on a mast.
4.8.2 Power supply and signal cable
If the sensor is mounted in the correct manner and connected with the right cable (accessory), you can attach the
wires for the power supply and signal outputs to the data acquisition equipment (computer). The ARCO sensor
requires a 5 pole M12 plug connector. The cable shield should be connected with both ends at the ground wire (PE).
To reduce the risk of inductive interference the sensor must be properly grounded (screening on both sides).
1Halbrundschraube mit Innensechskant
round head screw with hexagon socket
M3x8 DIN7380
2Schalenstern / cup rotor
3Schalensternglocke / cup rotor protective globe
4Skt-Stiftschlüssel / hex head wrench
4
1
2
3

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The external connection is carried out via a central connector which is located in the housing base. For further details
about the electrical connection please see section “Electrical connections“.
The typical power supply requirements of the sensor are 24 VDC with a current consumption of 20 mA. The input
range is 6.5...32 VDC. The heater of the ARCO is supplied with 24 VDC and has a current consumption of less than
0.9 A at heating power of 2·9 W. Under most climatological conditions the heating prevents blocking of the moving
sensor parts. Neither the cup rotor nor the wind vane are heated. In the case of icing or formation of ice on the moving
sensor element the function is restricted for the period of icing.
The output signal of the sensor conforms to the RS485 standard in talker mode. The line drivers are capable of
transmitting data over cable lengths up to 1,220 meters (4,000 feet). The cable lengths are dependent on the quality
of the cable used. As soon as the power supply of the sensor is switched on, the sensor automatically sends cyclic
data.
4.8.3 Safety regulations
Because the wind sensor is often mounted in exposed locations at dangerous heights the installation
personnel have to pay attention to the relevant safety regulations. During the electrical installation work
the external circuitbreaker must be switched o. It is not permitted for unauthorized persons to open the
housing!
5 Maintenance
5.1 Regular maintenance and calibrations
The wind sensors require very little maintenance and are designed for a long service life. Regular visual checks are
recommended, regarding dirt build-up on the surface caused by the weather. Whenever this is the case, we strongly
recommend to clean it. A regular visual and functional check of the wind sensor is recommended.
If reference measurements are necessary, it must be stringently noted that a comparison of the measured
values is given only if the measurements take place under same conditions. I.e. the reference equipment
must be used very close to the sensor!
The sensor is a measuring instrument and thus user specic standards apply regarding the period of recalibration.
Manufacturer’s recommendation: 2 years.
For the long-term assurance of the function and accuracy of the proposed components, we are pleased to oer you
our professional maintenance and calibration services.

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5.2 Visual inspections and cleaning work
The use of the sensor under the respective environmental conditions requires certain actions. It is thus
recommendable to clean the outside of the housing and shelter within specic intervals. The intervals are dependant
on the environmental conditions and the degree of soiling. We recommend a regular visual and functional check.
In case you should be faced with any specic problems, which you are unable to solve, please contact the
LAMBRECHTmeteo service:
Tel: [phone]
E-Mail: suppor[email protected]
6 Transports
In case it is necessary for you to ship or transport the sensor, it must be carefully packed to prevent damages during
transport.
7 Data protocols
DATA PROTOCOL WIMWV
WIND DIRECTION AND WIND SPEED
Example of a data sequence with comma seperatd elds:
$WIMWV,357.0,R,5.2,M,A*CS<CR><LF>
Field delimiter: , (comma)
Header: $WIMWV
Wind direction (WD): 0.0 to 360.0
R: relative wind direction
Wind speed (WS): 0.3 to 75.0
M: metric unit in m/s
Status A (valid) / V (invalid)
Stop delimiters: <CR> <LF>
Error code: WR 999.9
Error code: WG 99.9
NOTE:
In the development of a NMEA decoder xed eld lengths should not be assumed. The NMEA denition is based
on a variable eld length. The comma character (‘,’) serves as a eld separator. Numerical values in a eld can be
represented in dierent ways.
If a eld is not sent, it has a length of 0 characters (,,).
The check sum „CS“ is output as a 2 character hexadecimal value. All characters in the data sequence between „$“
and „*“, but excluding „$“ and „*“ are calculated as XOR function.
<CR>...carriage return (hex0D),
<LF>... linefeed (hex 0A)
Further protocols available on request.

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8 Dimensional drawings ARCO-SERIAL and ARCO-NAV

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9 Electrical connections ARCO-SERIAL and ARCO-NAV

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Photo copyright: © Kalyakan - Adobe stock
Copyright © 2023 LAMBRECHT meteo GmbH. All rights reserved.
Information in this document subject to change without notice.
LAMBRECHT meteo GmbH Tel [phone]
Friedländer Weg 65-67 Fax [phone]
37085 Göttingen E-Mail [e-mail]
Germany Internet www.lambrecht.net
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ARCO-SERIAL AND ARCO-NAV
ID 00.14581.010010 ARCO-SERIAL
00.14581.110010 ARCO-NAV
Range of application Temperature: -40...+70 °C heated *
Wind speed: 0...80 m/s
Relative humidity : 0...100 % r. h.
Supply voltage Sensor: 6.5...32 VDC/ 20 mA at 24 VDC
Heating electronically controlled 24 VDC/ 2·9 W
Interface serial RS 485/ Talker Baud rate 4800; 1 Hz (at measuring cycle 10 Hz); 8 N 1
Protocols NMEA 0183; WIMWV
Standards EMC/EMI: EN 60945; Low voltage guideline 73/23/EWG and VDE 0100; WMO No. 8;
VDI 3786 part 2; NMEA 0183
Housing seawater resistant aluminum specially coated and
RAL 9003 protective coating (ARCO-NAV); IP 65 in vertical position of use
Dimensions see dimensional drawings
Weight approx. 1.7 kg
Parameter Wind Direction
Measuring range 0...360°
Accuracy ± 1 %
Resolution < 1°
Starting value 0.3 m/s
Damping ratio 0.5...0.6
Parameter Wind Speed
Measuring range 0.3...75 m/s
Accuracy ± 2 % FS at 0.3...60 m/s
Resolution < 0.1 m/s
Starting value 0.3 m/s
Distance constant 4 m
Accessories (please order separately)
ID 32.14581.060000 Sensor cable, 10 m, 5 pole M12 plug
Option (please order separately)
ID 36.09340.000000 Visualization and evaluation software: MeteoWare-CS-3 Basic
10 Technical data
*) Remark: In the case of icing and formation of ice at the moveable sensor measuring element, the function is restricted for the period of icing.