Davis Anemometer D6410
Installation
• Follow the instructions from Davis Instruments.
Figure 1
• When installing the anemometer, orient it so that the mounting arm
Standard orientation
extends out true north from the mounting pole (Figure 1 & 2).
North
lightning rod
(if necessary)
If that is not possible, you will need to enter an offset in the software.
In the program menu, navigate to the calibration settings (details of
how to navigate vary). Choose the wind direction calibration option.
Enter the direction (in degrees) that the anemometer mounting arm
at least 3 feet
above obstacles
points. If it points east, for example, enter 90 (Figure 3).
• Be sure to secure the cable so that it will not blow around in the
wind. Use nylon wire ties or cable clamps at all points where the
cable is loose.
•Protect the cable from physical damage that might be caused by
cable secured
rodents, falling branches, etc.
• Unless the condition of study dictate otherwise, mount the
cup/vane assembly at least three feet above surrounding obstacles.
earth connection
Some standards suggest six feet (two meters) above the ground.
To Owl (Data Logger)
• If necessary, add lightning protection above the anemometer and
connect it to earth ground.
Figure 3
Anemometer Top View
Figure 2
Anemometer Top View
North
North
N
Enter 90 in software
tail
90°
mounting pole
tip
mounting arm
mounting arm
mounting pole
S
South
©2014 EME Systems, LLC | 2229 Fifth Street, Berkeley, CA 94710 | (510) 848-5725 | www.emesystems.com | pg.1
Davis anemometer D6410
Wiring
black, input to counter, wind speed
with pull-up to +V volts
reed
switch
CW
yellow, +R volts
magnet
(in cup assembly)
green, analog direction input
0 to +R volts
CCW
red, common
20kΩ potentiometer
For operation with the OWL, we sometimes
cut off the RJ11 connector and use the
stripped and tinned wires. The color code
for each signal wire is shown to the above
and below.
RJ11
yellow - +V
green - azimuth signal
red - common
black - wind switch
Conversion factors for wind speed calculation:
• one pulse per revolution of the cups.
• mph = 2.25 * rps
= 2.25 * hertz
• 60 Hertz at 135 mph. ( = 61.9 meters/sec = 217.3 km/hr. mph)
• mph = count/seconds * 2.25
• mps = count/seconds * 1.032
• kmph = count/second * 3.621
©2014 EME Systems, LLC | 2229 Fifth Street, Berkeley, CA 94710 | (510) 848-5725 | www.emesystems.com | pg.2