REALTIME CONTROL
RV229 Anemometer Adapter
2. Linearising and Zero Marking

IMPORTANT
Perform linearisation before fitting the transducer to the mast.


2.1 Connecting the RV229 to the transducer
rv229c connected to transducer


Fit the insulation sleeves supplied with the RV229 over the transducer lead end connectors.

Connect the transducer to the RV229, blue wire to blue wire and red wire to red wire.

If necessary, bend the spades slightly to ensure a firm fit.



2.2 Connecting the RV229 to a power source

db9 signals    

Either

(i) Plug the RV229 into a PC's serial port, and start a serial communications program (eg. Hyperterminal, Minicom) at 9600 baud,

or

(ii) Connect a battery or DC power supply capable of delivering in the range 3.7 V DC to 30.0 V DC at 4 mA or more to V- (pin 5) and V+ (pin 4) of a DB9 plug, and connect this plug to the RV229.



2.3 Linearisation

Before the transducer is fitted to the mast the RV229 must measure its still-air characteristics. This must take place with the transducer indoors, protected from all wind and draughts.

Connect the RV229 to the transducer and a power source as described above.

Hold the transducer body vertical. Flick one arm of the transducer rotor briskly with your finger so as to set the rotor spinning in a clockwise direction when viewed from above. The RV229 LED will flash three times per rotor revolution. Without touching the rotor, allow it to slow to a complete stop. Repeat this (typically 8-10 times) until the LED flashes only once per rotor revolution.


2.4 Marking Wind Direction Zero


After linearisation the RV229 LED flashes each time the arm of the tagged rotor cup passes through zero degrees.

Spin the rotor clockwise when viewed from above, observe the LED and mark the zero degrees position on the transducer body in line with the arm when the LED flashes.
 



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