aem.eco
LAMBRECHT meteo
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AEM
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ARCO
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7
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 firm 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 fixed 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 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.
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 offset 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).
1
Halbrundschraube mit Innensechskant
round head screw with hexagon socket
M3x8 DIN7380
2
Schalenstern / cup rotor
3
Schalensternglocke / cup rotor protective globe
4
Skt-Stiftschlüssel / hex head wrench
4
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