Manual
Wind Sensors EFFICIENT Modbus (14579)
(14579) EFFICIENT Modbus
Manual
1
Initial operation
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 tem-
poral variations; thus, strictly speaking, they are valid only for
the site where the measuring instrument is put up. We therefore
recommend to select the place of installation very carefully.
Selecting the place of installation
Generally, wind measuring instruments should not measure
the specific wind conditions of a limited area, but indicate the
typical wind conditions of a wider area. The values measured
at different 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 definition 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.
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, install the sensors at the same measuring
point, if possible, and make sure to avoid any mutual influ
-
ence of the sensors. A wind sensor pair easily meets this
requirement since the sensors are set up side by side. Their
horizontal distance should be approximately 1.5 m. The two
sensors must be staggered vertically so that the lower edge of
the upper wind speed sensor is 0.1 to 0.5 m above the upper
edge of the lower wind direction sensor.
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Principles of installation
Because the installation takes place in a danger
-
ous height, the assembly personal must follow
the rules for prevention of accidents.
I. Traverse with bore (e.g. Id-No. 32.14627.010000)
Material thickness for installation of the sensor between the
nuts may be max. 10 mm.
2. The sensor is led without cable into the bore and fastened
by the opposite side with the loose nut.
3. Attach the sensor with the flat side of detached nut from
the lower side. Tighten with a suitable tool (wrench size
36), until a twisting safety of the sensor aligned to the north
is given.
II. Mast or pipe mounting
Make sure the device is easily accessible so that you
can set up the north direction for the wind direction
sensor and perform any maintenance work. To reach
the sensors use a ladder of the appropriate length
or a telescoping working platform of the appropriate
height.
Ladders or other lifting helps must be absolutely
in order and must be guarantee a secure support!
Follow the rules for prevention of accidents.
Mount the sensors at the top of grounded tube with an outer
diameter Ø 48-50 mm. The mast adapter (see accessories)
is obligatory.
1. Remove both thread nut from the sensor.
2. The sensor is inserted without cable into the bore
(Ø 30 mm) of the adapter and locked from the opposite
side with a loose nut in the direction of the adapter.
3. And finally we recommend to lock the second nut with its
plane side ahead against the first nut (see drawing).
If wind speed and wind direction are measured at the same
time, the measurement generally takes place not only at the
top of a mast but also at the ends of a cross arm. The arms
must stay torsion-free and vibration-proof even at high wind
speeds and they must be accessible for you to perform mount-
ing and maintenance work.
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