Manual
Weather Sensor EOLOS-IND Modbus
(1643) EOLOS-IND Modbus
Manual
1
Introduction
The sensors of the EOLOS family are very robust, compact
and extremely reliable. When developing these sensors
particular consideration has been given to highest quality for
fulfi lment of meteorological requirements.
The sensors embody the experience of more than 150 years
of development and production of LAMBRECHT wind sensors.
The system acquires the horizontal air fl ow and processes
the measuring data to the meteorological parameters wind
speed and wind direction. Furthermore the weather-module of
the EOLOS-IND acquires the meteorological parameters air
temperature, relative humidity and barometric pressure. The
EOLOS-IND uses the measured data to calculate the dew
point temperature and makes it available together with the
measured values.
The sensors and further system components are mounted in
a splash water- and dust proof metal housing.
Due to their shock- and vibration proof construction the sen-
sor EOLOS-IND is particularly qualifi ed for use under severe
environmental conditions. The housing is made of anodised
seawater resistant aluminium.
1.1
Warranty Advices
Please note the loss of warranty and non-liability by unau-
thorised 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 qualifi 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 elec-
tromagnetic fi elds which are beyond the standards and
specifi 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 specifi ed operation conditions.
1.2
Advantages of the Static
Measuring Principle
The sensor EOLOS-IND is a modern system to carry out pre-
cise and reliable measurements under hardest application and
environmental conditions. The wind measurements take place
according to the principle „TAV“ (thermal aura fi eld variation),
i. e. static, without moving parts.
Static measuring principle for wind measurements means:
• Determination of data works without moving measuring
elements, i.e. none abrasion, least maintenance and none
recalibration because of this method.
• Lightweight mass and immovable measuring elements to
enable very low starting values, distance- and attenuation
constants as well as a very high repetition accuracy.
• The sensor can be installed rapidly. Due to the special
measuring principle minor changes from the angle of pitch
can be disregarded.
Advantages of the sensor:
• Apart from the sensors for wind speed and direction the
compact housing also contains built-in sensors for air
temperature, relative humidity and barometric pressure.
• The compact design of this sensor with 5 meteorological
parameters is eliminating the traditional cabling and instal-
lation work signifi cantly. Distribution boxes, power supply
units and other accessories can be reduced to a minimum
expense.
2
Setting to Work
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, they are valid only
for the site where the measuring instrument is installed. We
therefore recommend selecting the place of installation very
carefully.
2.1
Installation Conditions
2.1.1
Generally
For professional wind measurements according to meteoro-
logical standards (e. g. VDI 3786, Part 2) location and height
of the wind sensor are important for representative and ac-
curate results. Generally, wind measuring instruments should
not measure the specifi c wind conditions of a limited area, but
indicate the typical wind conditions of a wider area. To obtain
results which are representative for a wider area and compa-
rable to values measured at diff erent places, the sensor must
not be mounted under the lee of higher obstacles.
The distance to any obstacle should be at least 10 times the
obstacle‘s height (corresponding to the defi nition of an undis-
turbed area). In general a measuring height of 10 m above
ground is regarded ideal. If an undisturbed terrain of this kind
does not exist the sensor have to be put up at an height of at
least 6 m above the obstacle height.
If the above mentioned requirements are not feasible e. g. on
mobile measurements at vehicles or at measuring containers
compromises have to be found and documented.
If the sensor must be installed on a roof top the place of instal-
lation must be in the middle of the roof to avoid predominant
wind directions. If you want to measure both wind direction
and wind speed, it is recommended to mount both sensors
at the same spot, where any interaction between the sensors
should be avoided. The sensor EOLOS-IND easily meets this
requirement.
3