Davis Instruments Anemometer, 7911, 7914 Installation Manual
Product # 7911, 7914
S
TANDARD AND
I
NDUSTRIAL
A
NEMOMETER
I
NSTALLATION MANUAL
The anemometer enables you to measure and display wind-related conditions
such as wind speed, wind direction, wind run, wind chill, and the
temperature-humidity-sun-wind index.
Components
The anemometer includes the components listed below. Please be sure you
have all listed components before continuing. The installation hardware kit
contains the items most commonly needed for the installation of the anemometer. Which items you use from the kit depend on where you install your unit.
You may need to adapt or purchase additional hardware to fit your individual
requirements. Assess your installation and make sure you have all necessary
parts, tools, and materials before you begin.
✦
Anemometer Arm with cable
✦
Anemometer Base
✦
Wind Cups
✦
Wind Vane
✦
Drip Rings
Anemometer
Base
Drip
Rings
Wind Cups
Wind Vane
Anemometer Arm
with 40 feet (12.2 meters)
of cable
Tools and Materials Needed
Page 2 Standard and Industrial Anemometer
✦
Installation Hardware Kit
✦
Two U-Bolts
✦
Four 1/4” Flat Washers
✦
Four 1/4” Hex Nuts
✦
Four 1/4” x 1 1/2” Lag
Screws
✦
One #4-40 x 1 1/4” Pan
Head Screw
✦
One #4 Flat Washer
✦
One #9 Lock Washer
✦
One #4-40 Hex Nut
✦
Allen Wrench
Tools and Materials Needed
You will need the following tools and materials to install your anemometer:
✦
Cable Clips or Weather-Resistant Cable Ties
Note: Make sure the clips or ties you use to secure the anemometer cable have screw holes or other means
for mounting the cable. Do not use metal staples to secure the cables.
✦
Stainless Steel Hose Clamps
✦
Small Screwdrivers
✦
Adjustable Wrench
✦
Hand-Held Compass or Local Area Map
Testing the Anemometer
Before beginning your installation, follow the instructions below to test the anemometer wind speed and wind direction functions.
1.
Connect the anemometer cable to the appropriate connector on your sensor
interface module (SIM) or junction box.
2.
Push the wind cups onto the smaller of the two stainless steel shafts at the
end of the arm.
3.
Spin the wind cups gently . You haven’t secured them yet, and if you spin
them too hard you may knock them off.
4.
Check the display on your weather station to make sure you are getting a
wind speed reading.
5.
Grab the larger of the two stainless steel shafts at the end of the arm with
your fingers and twist the shaft about 1/2 turn.
Assembling the Anemometer
Page 3
6.
Check the display to make sure the wind direction reading on your display
changes.
Note: The wind direction readings will not change as rapidly as you turn the shaft. The station uses a low
pass filter to smooth out the constant small shifts in wind direction and keep the direction display
from jumping about in gusty winds.
7.
Disconnect the cables when you are finished testing the anemometer.
Assembling the Anemometer
Attach the drip rings and the wind cups to the anemometer and check the
mounting base orientation before you install it. The wind vane is attached after
the anemometer has been installed.
Attaching the Drip Rings
The anemometer drip rings provide protection against icing of the wind vane
and wind cups. Follow the instructions below to attach the two drip rings.
1.
Place one of the drip rings on a flat surface with the small hole facing up.
2.
Securely press the wind vane on top of the drip ring.
Note: You may want to start with the vane tilted slightly.
3.
Make sure the ring fits securely between the two ridges on the vane with the
lower edge parallel to the bottom of the wind vane.
Installing the drip ring onto the wind vane
Assembling the Anemometer
Page 4 Standard and Industrial Anemometer
4.
Install the small end of the other drip ring on the wind cup end of the anemometer control head as shown below.
Note: The wind cup end of the control head has the smaller of the two stainless steel shafts.
5.
Gently push up the drip ring until it reaches the groove on the control head.
6.
Make sure the lower edge of the drip ring is aligned with the lower edge of
the control head.
Installing the drip ring onto the anemometer control head
Attaching the Wind Cups
Before installing the anemometer, attach the wind cups. Wait until you have
installed the anemometer before you attach the wind vane.
1.
Push the wind cups onto the smaller of the two stainless steel shafts at the
end of the arm.
Attaching wind cups to the anemometer
2.
Slide the wind cups as far up the shaft as possible.
Push cups onto
stainless steel
shaft
Tighten set screw
with allen wrench
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