DAVIS Weather Monitor II User Manual
®
II
ONITOR
M
O
WNER’S
EATHER
W
M
ANUAL
Product # 7440
Product Numbers: 7440 {CS, EZ, W, WS, M, EU, UK}
Davis Instruments Part Number: 7395.002
Weather Monitor II
®
Controlled Online: DI:Weather Manuals:Consoles:Weather Monitor II
Rev. F Manual (5/4/00)
This product complies with the essential protection requirements of the
EC EMC Directive 89/336/EC.
© Davis Instruments Corp. 2000. All rights reserved.
Weather Monitor II and WeatherLink are registered trademarks of Davis
Instruments Corp.
Macintosh is a registered trademark of Apple Computer, Inc. Windows is
a trademark of Microsoft Corp. Duco is a registered trademark of Devcon. All other brand or product names are trademarks or registered
trademarks of their respective companies or organizations.
ABLE OF
T
I
NTRODUCTION
System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Optional Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Tools and Materials Needed for Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
A Typical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
A
SSEMBLING THE STATION
Powering the Weather Monitor II. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Connecting the Console and Junction Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Assembling the Anemometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
T
ESTING THE STATION
Testing the Anemometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Testing the External Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
I
NSTALLING THE STATION
Installing the Anemometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Installing the External Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Mounting the Junction Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Displaying the Console . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
U
Using the Enter Key. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Highs and Lows. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Time and Date. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Wind Speed and Wind Direction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Wind Chill . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Rainfall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Barometric Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Dew Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
SING
THE
W
EATHER
ONTENTS
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . 5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
. . . . . . . . . . . . . . . . . . . . . . . . . . . 10
F
UNCTIONS
. . . . . . . . . . . . . . . . . . . . . 16
SING
U
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Total Clear. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Auto Scan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Display Lamp. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Weather Monitor II Page i
THE
ONSOLE
C
UNCTIONS
F
. . . . . . . . . . . . . . . . . . . . . 30
Table of Contents
ALIBRATION
C
Inside and Outside Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Wind Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Humidity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Rainfall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Changing Calibration Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Resetting Calibration Numbers to Default. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
T
ROUBLESHOOTING
Console Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Temperature Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Humidity Tips. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Wind Tips. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Wind Chill Tips. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
W
ARRANTY
One Year Limited Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Questions? Call the Davis Service Center. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
FCC Part 15 Class B Registration Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
N
AND
UMBERS
G
UIDE
R
EPAIRS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
. . . . . . . . . . . . . . . . . . . . . . . . . . 39
. . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Page ii Weather Monitor II
System Components
1. I
NTRODUCTION
The Weather Monitor II provides sophisticated monitoring and logging of
essential weather conditions such as inside and outside temperature, barometric pressure, wind direction, wind speed and wind chill. This instruction manual takes you step-by-step through the process of assembling, testing, and
installing your Weather Monitor II so you can begin collecting data as soon as
possible.
The standard station comes with all the sensors necessary to monitor the essential weather conditions described above. For instructions on how to install and
operate optional accessories, such as the Rain Collector or the External Temperature/Humidity Sensor, please refer to the appropriate manual.
If you have a non-standard station (e.g. Wireless or EZ-Mount), please refer to
the separate installation manual provided before continuing with this installation.
S
YSTEM
C
OMPONENTS
Your Weather Monitor II consists of the following components. Please check to
be sure you have all of the components listed before proceeding.
Weather Station Console
Mounting Base
attached to
bottom
of Console
Anemometer Arm
with 40 feet (12.2 meters)
of cable
Wind Vane
Drip
Rings
Anemometer
AC-Power
Adapter
External Temperature Sensor
with 25 feet (7.6 meters)
Cable Labels (not shown)
Junction Box Cable
8 feet (2.4 meters) long
of cable
Junction Box
Base
#6 x 1/2"
Pan Head
Self-Threading
Screws
U-Bolts
1/4" Flat Washers
1/4"– 20 Hex Nuts
#6 x 1"
Pan Head
Self-Threading
Screws
#8 x 3/4"
Pan Head
Self-Threading
Screws
Wind Cups
4–40 x 1-1/8" Pan Head
Self-Threading Screw
#4 Flat Washer
#4 Lock Washer
4–40 Hex Nut
1/4" x 1-1/2"
Lag Screws
Allen
Wrench
Weather Monitor II Page 1
Introduction
PTIONAL
O
The following accessories are designed for use with the Weather Monitor II.
• External Temperature/Humidity Sensor
• Rain Collector
•WeatherLink
• Car/Boat/RV Lighter Cord
• Sensor Mounting Arm
• Radiation Shield
•Protected Junction Box
• Extension Cables
• Junction Box Cables
CCESSORIES
A
Replaces the standard external temperature sensor. Allows you to measure outside humidity and dew point in addition to temperature.
Includes 40 feet (12.2 meters) of cable.
Enables you to measure daily and accumulated rainfall. Separate models
measure rainfall in either 0.01 inch or 0.2 mm increments. Optional Rain
Collector Heater allows you to measure freezing rain or the moisture
content of snowfall.
®
Software and Data Logger
Logs data gathered by the Weather Monitor II, downloads it to your PC
or Macintosh
weather data.
Uses the cigarette lighter in your car, RV, truck, or boat to power the
Weather Monitor II. Replaces the standard AC-power adapter.
A single-location mounting option for all your sensors. Includes positioning for anemometer , external temperatur e or temperature/humidity
sensor (with Radiation Shield), and Rain Collector (with Rain Collector
Shelf).
Protects the temperature or temperature/humidity sensor from the sun
and the effects of radiated and reflected heat. Increases the life of the sensor and the accuracy of the readings.
Provides upgraded protection against radio frequency interference
(RFI), electrostatic discharges (ESD), and power surges that can come
through sensor wires. Replaces junction box included with the station.
Extends cable length for total cable runs of 80-140 feet (24-42 m) sensor
to console. Order the 4-Conductor Extension Cable [in lengths of 40 feet
(12 m) or 100 feet (30 m)] for use with the anemometer , external temperature sensor, Rain Collector, or WeatherLink. Order the 6-Conductor
Extension Cable [in lengths of 40 feet (12 m) only] for use with the External Temperature/Humidity Sensor.
Order a Standard 8-Conductor Cable for greater flexibility in the placement of your console. Comes in lengths of 25, 50, and 100 feet (7.6, 15.2,
and 30.4 m).
®
, and generates reports and graphical displays of your
Page 2 Weather Monitor II
Tools and Materials Needed for Installation
OOLS
T
Optional Tools and Materials
AND
In addition to the enclosed components, you will need the following tools and
materials to complete the installation. Please be sure you have everything you
need before proceeding with the installation.
• Cable clips or weather resistant cable ties—with screw holes or other means for
mounting
• Small and medium-sized screwdrivers
• Hand-held magnetic compass or local area map
• Hammer
• Small adjustable wrench
• Duco
recommend the use of “super glue” type products.
• 9-volt alkaline battery to be used as backup power supply (page 6)
• Carpenter’s level to level the anemometer base (page 10)
• Electric drill with 3/16” (4.8 mm) and/or #29 (0.136” or 3.5 mm) drill bits to drill
pilot holes (page 10 and page 13)
• Electric tape if mounting the anemometer on metal mast or pipe (page 11)
•2 stainless steel hose clamps if mounting the anemometer on pipe with diameter
greater than 1 1/4” (32 mm) (page 11)
• Standard switch box if mounting the console with the wires running inside the
wall (page 14)
• Medium Phillips screwdriver if mounting the console on a wall (page 15)
ATERIALS
M
®
Cement (or similar adhesive or glue for gluing plastic). Note that we do not
N
EEDED
FOR
NSTALLATION
I
Weather Monitor II Page 3
Introduction
A T
YPICAL
Anemometer
NSTALLATION
I
External
Temp-
erature
Sensor
Rain Collector
(optional)
WEATHER MONITOR II
To WeatherLink
(optional)
AC Power
Adapter
Power
Outlet
RAIN
TEMP
WEATHER
NORTH SIDE OF BUILDING in Northern Hemisphere
SOUTH SIDE OF BUILDING in Southern Hemisphere
COMPUTER
WIND
Junction Box
Junction Box
Cable
The diagram above shows a typical Weather Monitor II installation. The following pages will give you specific instructions for installing your station. To
avoid unnecessary problems, be sure to thoroughly test your system before
installing it.
WARNING: Climbing on your roof can be hazardous. If you are uneasy about installing your
unit, please have a qualified professional complete the installation. Davis specifically disclaims any liability for injury or loss resulting from the installation or use
of the Weather Monitor II.
Page 4 Weather Monitor II
Powering the Weather Monitor II
2. A
OWERING
P
SSEMBLING
The Weather Monitor II is a precision instrument, designed to give extremely
accurate readings. As with any precision instr ument, car e must be used during
assembly. These instructions detail how to assemble the stations with a minimum of time and effort.
THE
The Weather Monitor II is powered by 9- to 12-volt DC (direct current). In
North America, the power adapter included with your unit converts 120-volt,
60-Hz AC (alternating current) to 9-volt DC, allowing you to run the unit on
ordinary household current. You may also run the Weather Monitor II on the
12-volt DC power supplied by a car, boat, or RV battery by using the optional
Car/Boat/RV Lighter Cord.
If you are outside North America and in a location where the power supply is
not equivalent to the North American standard (120-volt, 60-Hz), check to see if
your local dealer has supplied a power adapter that is appropriate for your
power supply before you connect the power adapter to the console. If not, you
must use a power converter/transformer or the appropriate power adapter (9volt, 2.5-mm female plug).
In any case, we recommend that you also install a 9-volt alkaline battery as a
backup power supply. In the event of a power outage, the battery will power
the station. Not only will this prevent the loss of stored data in the console, but
will also allow you to continue observing weather conditions during the power
outage.
New alkaline batteries will power the Weather Monitor II for 24 - 48 hours. For
maximum security, keep the battery backup fresh. You should replace batteries
any time the unit has operated on battery power for more than 18 hours. To
prevent loss of data when replacing batteries, make sure the unit is receiving
power from the adapter before changing batteries.
unit, press and hold down CLEAR for approximately 12 seconds to clear
erroneous highs and lows.
W
EATHER
THE
ONITOR
M
TATION
S
II
Whenever you repower the
Note: We do not recommend the use of Ni-Cad batteries. Ni-Cad batteries carry less power than alkaline
batteries, and they will not be recharged by the station. In the event of a power outage, Ni-Cad batteries will be able to power the station for a shorter period of time than alkaline batteries will.
To Connect the Power Adapter to the Console
1. Remove the mounting base from the console.
Push down on the large tab behind the display until it will easily slide out from
the notch. Then lift the mounting base so the two smaller tabs behind the keyboard slide free. Place the mounting base aside until you mount the console (see
“Displaying the Console” on page 14).
2. Slide the power adapter plug into the jack marked POWER underneath the console.
Weather Monitor II Page 5
Assembling the Station
3. Plug the other end of the power adapter into an appropriate power outlet or, preferably, into a computer-grade surge protector.
It is highly recommended that you plug the power adapter into a computer-grade surge
protector, especially in high-lightning areas.
should run through a brief self-test procedure. All of the display segments
appear, and the console beeps twice within 10 seconds (3 times within 20 seconds
if WeatherLink is installed) to indicate everything is working properly.
4. After the second beep (or the third beep with WeatherLink), the compass rose, the
barometric trend arrow and the time (reading 12:00 a.m.) appear on the display.
To Install the Battery Backup Power Supply
Before you install the backup battery, make sure AC power is connected and
the console is completely powered up. Installing the battery first can cause the
console to lock up.
Once the console is powered up, install the backup battery as shown below.
Underside
of Console
Once power is applied, the console
Battery
Cover
Release
Tab
Note: When the unit is operating on battery power, the digits on the right side of the display blink on and
off. The unit operates normally in all other respects.
C
ONNECTING
The junction box connects the external sensors and the console. Information
from the sensors comes into the junction box. The junction box then relays
information to the console where it is processed and displayed.
To Connect the Console and Junction Box
1. Plug one end of the 8-foot (2.4-meter) long junction box cable into the jack labeled
JUNCTION BOX underneath the console.
2. Plug the other end of the cable into the jack marked CONSOLE on the junction box.
A
SSEMBLING
To assemble the anemometer you need the following: anemometer arm (with
cable), anemometer base, wind cups, drip rings, allen wrench, 4-40 x 1 1/8inch pan head screw, #4 flat washer, #4 lock washer, and 4-40 hex nut.
Page 6 Weather Monitor II
THE
C
THE
A
NEMOMETER
ONSOLE
AND
Standard
9-Volt Alkaline
Battery
J
UNCTION
B
OX
Assembling the Anemometer
Avoid lubricating the wind cup shaft and bearings or the wind vane shaft. Natural or synthetic lubricant reduces the anemometer’s efficiency.
Note: Do NOT attach the wind vane now. Install the anemometer before attaching wind vane. (See page
11)
To Attach the Anemometer Arm to the Anemometer Base
1. Insert the anemometer arm into the anemometer base, sliding cable through the slot
in the base as shown.
Line up the small hole in the arm with the holes in the base.
2. Insert the 4-40 screw into one of the holes in the base and through the arm.
The screw should slide easily through the holes.
3. Secure as shown below.
4-40 Hex Nut
#4 Lock Washer
#4 Flat Washer
4-40 x 1" Pan Head Screw
To Attach the Drip Rings to the Wind Vane and Anemometer Arm
The drip rings protect against icing of the wind vane and wind cups. If you do
not install them, the anemometer will function normally in non-icy conditions.
1. Remove the wind cups and wind vane from the anemometer using the allen wrench.
For details, consult your station or anemometer manual. You may want to
make a note of the anemometer’s mounted position for later realignment.
2. Place a drip ring on a flat surface with the small hole facing up. Securely press the
wind vane on top of the drip ring.
Tilt the vane slightly. Ensure the ring fits securely between the two ridges on
the vane
S
D
R
W
ECURING
RIP
ING
ON
IND
V
ANE
Weather Monitor II Page 7
Assembling the Station
3. Install the small end of the other drip ring on the WIND CUP END OF THE
ANEMOMETER CONTROL HEAD as shown below. Gently push up the drip ring until it
reaches the groove on the control head.
The wind cup end of the control head has the smaller of the two stainless
steel shafts. When attaching the drip ring, make sure the lower edge of the
ring is aligned with the lower edge of the control head.
SECURING DRIP RING ON CONTROL HEAD
4. After installing the drip ring, reattach the wind vane and wind cups to the
anemometer.
For details, consult your station or anemometer manual.
To Attach the Wind Cups to the Anemometer Arm
1. Push the wind cups onto the smaller of the two stainless steel shafts at the end of the
arm.
2. Slide the wind cups as far up the shaft as possible.
3. Use the allen wrench provided to tighten the set screw on the side of the wind cups.
Note that when you let go of the wind cups, they should drop slightly.
4. Spin the wind cups. If they do not spin freely, loosen the set screw and lower the cups
slightly. Repeat until the wind cups spin freely.
Push cups onto
stainless steel
shaft
Tighten set screw
with allen wrench
Page 8 Weather Monitor II
Testing the Anemometer
3. TESTING THE STATION
Before doing anything else, test the station in your living room or workshop. If
you have purchased the optional rain collector or additional sensors, now is
the time to assemble and test these using the appropriate manual. Consult the
Troubleshooting Guide on page 39, or the guides in the respective manuals, if
you experience any difficulty.
Note: You should test each external sensor without extension cables first, and then repeat the test with
extension cables. In this way, you can be reasonably sure whether any problems are the fault of the
extension cables or the external sensor itself.
TESTING THE ANEMOMETER
Before you install the anemometer, make sure that the wind speed and wind
direction sensors are functioning correctly.
1. Insert the cable plug at the end of the anemometer cable into the jack marked WIND
on the junction box.
2. Test your assembly by spinning the wind cups.
You should get a speed reading other than 0 on the compass rose in the console
display. If you do not, loosen the set screw and move the wind cups slightly up
or down on the shaft until you get a reading other than 0. Once you are getting a
reading, use the allen wrench provided to tighten the set screw on the side of the
wind cups. Do not over-tighten.
3. Turn the wind direction shaft (the larger of the two stainless steel shafts on the con-
trol head) with your fingers.
Check that the direction readings change on the compass rose in the console display.
TESTING THE EXTERNAL TEMPERATURE SENSOR
Be sure you get a reading from the external temperature sensor as well. Or, if
you have purchased the optional External Temperature/Humidity Sensor, be
sure to test both the temperature and the humidity readings at this time.
To Test the Temperature Sensor
1. Insert the cable plug at the end of the external temperature sensor into the jack
marked TEMP on the junction box.
2. Press TEMP.
A temperature reading and the words INSIDE and TEMPERATURE should
appear on the display.
3. Press TEMP again.
A temperature reading and the words OUTSIDE and TEMPERATURE should
appear on the display.
Weather Monitor II Page 9
Installing the Station
4. INSTALLING THE STATION
Make sure you have thoroughly tested the station before installing it. Then,
decide where you will place each component—the junction box, the console,
and all external sensors. Pay close attention to the suggestions given in the sections dealing with the individual components, as well as the following general
suggestions:
• The junction box cable must be able to reach the console.
If you want to place the junction box and console more than 8 feet (2.4 m)
apart, you will need a longer junction box cable (see page 2).
• The cable coming from each external sensor must be long enough to reach the
junction box.
If the sensors are placed farther away than their allotted cable lengths
allow, use extension cables (see page 2).
INSTALLING THE ANEMOMETER
Most people install the anemometer on the roofs of their houses, where wind
flow is unobstructed by trees and nearby buildings. For the most accurate readings, the anemometer should be mounted at least 4 feet (1.2 m) above the roof
line. You can do this by mounting the anemometer on your television antenna
or on a raised piece of wood or metal pipe.
We have included the hardware most commonly needed for the installation of
the anemometer. The hardware you use depends upon where you install your
unit. You may need to adapt or purchase additional hardware to fit your individual requirements. Make sure that you have all of the necessary parts, tools,
and materials before you begin.
To Install the Anemometer
1. Disconnect the anemometer cable from the junction box.
2. Wrap the WIND cable labels around each end of the cable.
3. Mount the anemometer according to the following instructions. As you do so, use a
carpenter's level to make sure the anemometer base is mounted vertically.
WOODEN POST OR SURFACE
1. Locate a suitable mounting surface for the anemometer
base. The mounting surface should be at least as wide as
the anemometer base and level.
2. Hold the anemometer base against the wood surface
and use a pencil to mark the location of the four holes
on the base.
3. Use an electric drill with a 3/16 inch (4.8-mm) drill bit to
make pilot holes in these locations.
4. Drive the four lag screws through the holes in the anemometer base and into the wood.
Page 10 Weather Monitor II
Installing the Anemometer
Metal Pipe
Hose Clamps
ANTENNA MAST OR METAL PIPE
1 1/4 INCHES (19 TO 32 MM)
- OUTSIDE DIAMETER 3/4 TO
1. Make sure that the antenna mast or metal pipe is properly
grounded. If you are not sure, consult a qualified professional.
2. Hold the anemometer base against the pipe and insert the two
U-bolts through the back of the base so that the U-bolts wrap
around the pipe.
3. Place a 1/4-inch washer and a 1/4-20 hex nut over each end of
the U-bolts. Use a wrench to tighten the hex nuts.
METAL MAST OR PIPE - OUTSIDE DIAMETER GREATER THAN 1 1/4 INCHES (32 MM)
1. Obtain two stainless steel hose clamps large enough to fit
around the mast or pipe and the anemometer base. These can
be purchased at your local hardware store.
2. Make sure that the metal mast or pipe is properly grounded. If
you are not sure, consult a qualified professional.
3. Hold the anemometer base against the pipe and fasten the hose
clamps over the anemometer base and around the metal mast
or pipe.
To Attach the Wind Vane
To mount the wind vane, you will need to look at the console display. You may
wish to have a friend or family member on the ground do this for you. Or, you
may wish to bring the console and junction box onto the roof with you.
1. After installing the anemometer, re-insert the plug at the end of the anemometer
cable into the jack marked WIND on the junction box
2. Press WIND on the console until a wind direction reading and the word DIRECTION
appear on the display.
3. Use a compass or local area map to determine which direction (N, S, E, W, NE, etc.)
the anemometer arm is pointing.
4. Use the wind direction chart to find the
0° N
degree reading which corresponds to that
direction.
5. Slowly turn the wind direction shaft with your
fingers. Stop turning when the console display
reaches the degree reading obtained in step
270° W90° E
4.
6. Being careful to keep the stainless steel shaft
from turning, place the wind vane on the shaft
180° S
with the bullet-shaped nose of the vane pointing in the same direction as the arm.
WIND DIRECTION CHART
45° NE315° NW
135° SE225° SW
Weather Monitor II Page 11
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