REALTIME CONTROL
RV229 Anemometer Adapter
Users Manual
6. Logging speed and direction distributions
The RV229 can log wind speed and direction distributions in a form
suitable for wind power site analysis. By logging distributions rather
than discrete speed and direction measurements, the RV229 both
performs some of the preprocessing required for site analysis and
minimises the storage requirements for the data. Unattended an RV229
can accumulate the speed and direction distributions over a period of
more than a year.
While logging the RV229 does not deliver real time serial, analog or
pulse frequency signals, but operates in power saving mode wherein
these outputs are idle and the transducer is powered for only fifteen
seconds each two minutes. As a result of these power saving measures, a
regular alkaline lantern battery will run an RV229 in logging mode
along with its transducer for more than a year.
Connect the transducer to the RV229.
Use a DE9/DB9 plug to connect to the RV229, and on this:
Connect the Speed and Direction output
pins together but to nothing else.
Leave the Serial In and Serial Out pins floating, ie. connect nothing
to them.
Connect a battery or power supply capable of delivering in the range
3.7 V DC to 30.0 V DC
@ 4 mA to V- and V+.
Connect this plug to the RV229.
For the first two minutes after powerup the RV229's LED flashes once
per
rotor revolution.
Of each subsequent two minute period the LED is on for 1¾
minutes then flashes once per rotor
revolution for the remaining ¼ minute.
On completing logging, depower the RV229 when the LED is on and steady,
not while it is off or flashing. This avoids the risk of interrupting a
write to the log's flash memory, which could corrupt the data therein.
Index
RV229 Home
