Lambrecht aem INDUSTRY, User Manual

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LAMBRECHT meteo | AEM | INDUSTRY
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1. Remove both thread nut from the sensor.
2. The sensor with cable-plug connection is led without cable into the bore
and fastened by the opposite side with a loose nut as under I.3.
3. The loose nut to be touched now with the flat side first over the cable, in
order to fasten the sensor as under I.3.
4. And finally we recommend to lock the second nut with its plane side ahead
against the first nut (see drawing).
You can also use masts that can turn around their vertical axis or masts
consisting of individual segments or telescoping masts that you can secure
after setting up the north direction.
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 mounting
and maintenance work.
When you install the connecting cables make sure not to excessively shorten the cable leading to the
connector in the lower part of the sensor casing so that you can later maintain or dismounting the sensor. Put
further a cable loop as sensor protection against water under the sensor.
Tip: Install the sensors on ground to the traverse and align you the wind vane parallel to the traverse. You go
only then upward, in order to accordingly align the sensors with traverse under assistance of a partner on
ground.
Setting up the north direction for the wind vane
For wind direction measurements the north mark on the sensor must be aligned with the geographical north
direction. You have to turn the marking exactly over the marking at the sensor shaft. When you have aligned the
marks, you may fix the wind vane with e.g. a piece of adhesive tape. When you have fixed the wind vane this way 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 final 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.
Please make sure there is no magnetic deviation of the compass.
Once the wind direction sensor is aligned, you can mount it as described under "Mounting". The adhesive strips
must be removed. A functional test on three directions offset by 90° is recommended. If the local conditions do not
allow the reference point to be set up in the north direction, the procedure can be applied analogously to a southern
reference point. Note that the north mark on the sensor then does not point to the reference point, but in the opposite
direction.