KWR-631 Propeller-type Recording Wind Vane/Anemometer (3-Element)
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OVERVIEW

The KWR-631 records both instantaneous and average wind speeds and wind direction, which can be switch-selected for either instantaneous or average. Data is cleanly recorded using cartridge pens, avoiding smearing and smudging common with siphon-type pens. A servo drives the drum, providing the torque needed for reliable operation on boats or in other situations where motion is a factor. A terminal jack on the rear of the recorder unit allows for convenient connection to a wind speed and direction indicator. Meanwhile, the rear of the unit also has terminal jacks for providing a separate analog signal (0-1 V) for each element.

SPECIFICATIONS

Propeller-type wind speed/direction sensor (W611)
Speed component	Propeller-type AC generator
Direction component	Synchro motor vane
Wind run sensor	60 m wind run, electric contact output
(optional)
Startup threshold	Less than 2 m/s
Weatherability	Winds of greater than 90 m/s
Three-element recorder (WR7110)
Recording method	Arc-writing cartridge pens
Pen drive	Servo
Chart paper	Scroll-type
Recorded range	Instantaneous speed: 0-60 m/s
	Average speed: 0-50 m/s
	Direction: 16 cardinal points or 540° (instantaneous or average)
Chart width	Instantaneous speed: 90 mm
	Average speed: 60 mm
	Direction 60 mm
Accuracy	Speed: ±0.5 m/s at winds of 10 m/s or less; ±5% at winds greater than 10 m/s
	Direction: ±5°