Young Wind Sensor Calibration Accessories - Manual (Page 3)

Page 2
18860-90
PROCEDURE
In calm weather blow gently on propeller. Watch for obvious high torque
or irregular rotation.
Remove propeller or cupwheel. Drive shaft at known rpm, representing
mid range of sensor. Compare output signal to established calibration.
In calm weather blow gently on vane. Watch for obvious high torque or
irregular motion.
Visually align vane with known reference. Compare output signal. Align
vane with additional reference points or cardinal points marked on hous-
ing. Compare output signal to established calibration.
Wind Speed Threshold:
Wind Speed Signal:
Wind Direction Threshold:
Wind Direction Signal:
EQUIPMENT
None
Anemometer Drive
None
Survey of visible landmarks, ac-
curate magnetic compass, or solar
noon orientation.
TOWER CHECK
Perform tower check for each initial installation regardless of prior calibration interval.
TRAILER CHECK
Sensors are removed from tower and connected to signal conditioning modules with sensor cable patch cords.
PROCEDURE
Remove propeller. Set torque disc for proper torque according to table and
curves supplied. Install torque disc on propeller shaft and check rotation
of disc. See instructions on torque disc drawing.
Remove propeller. Drive shaft at 200 rpm. Check output for measurable
signal. Drive shaft at rpm representing mid range of sensor. Compare
output signal to established calibration.
Hold or mount sensor on desk top with fin horizontal to check vane bal-
ance. Adjust if required. After balancing vane assembly, mount sensor
on bench stand on level surface. Determine proper torque according to
table and curves supplied. Place torque gauge on vane housing and ap-
ply steady force to end of leaf spring. Record maximum torque value for
both CW and CCW rotation. See instructions on torque gauge drawing.
Mount sensor on Bench Stand. Rotate fixture through 360 degrees com-
paring output signal at 30 degree intervals.
Wind Speed Threshold:
Wind Speed Signal:
Wind Direction Threshold:
Wind Direction Signal:
EQUIPMENT
Propeller Torque Disc
Anemometer Drive
Vane Torque Gauge
Vane Angle Bench Stand
Vane Angle Bench Stand