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Davis Instruments Fan-Aspirated Radiation Shield Installation Manual

Fan-aspirated wireless temperature/humidity station
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Download this manual See also: Instruction and Installation Manual, Installation Manual
The Fan-Aspirated Wireless Temperature/Humidity Station, referred to in this manual as
the Fan-Aspirated Temp/Hum Station, combines fan aspiration and passive shielding to
minimize the effects of solar radiation on temperature measurement. This manual pro-
vides step-by-step instructions for installing your Fan-Aspirated Temp/Hum Station.
Components
The Fan-Aspirated Temp/Hum Station includes these items shown below and on the
next page:
Fan-Aspirated Radiation Shield
F
- A
A N
W
I R E L E S S
T
E M P E R A T U R E
S
TA T I O N
I
N S T A L L A T I O N
Components, Part 1
S P I R A T E D
/H
M
A N U A L
Junction Board Cover
Mounting Bracket
U M I D I T Y
, R
C
E V
SIM Housing
Product # 6385

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Summary of Contents for Davis Instruments Fan-Aspirated Radiation Shield

  • Page 1 Components The Fan-Aspirated Temp/Hum Station includes these items shown below and on the next page: Fan-Aspirated Radiation Shield S P I R A T E D I R E L E S S E M P E R A T U R E...

  • Page 2: Tools Needed

    1-1/2" U-Bolts (2) 1/4" Flat Washers (4) 1/4" Hex-Nuts (4) Tools Needed You may need the following tools to install your station: • A medium Phillips-Head screwdriver. • A small wrench or 3/8” (9 mm) nutdriver. Installation Steps The Fan-Aspirated Temp/Hum Station comes pre-assembled. You will, however, need to partially disassemble your station to prepare it for operation.
  • Page 3 Preparing the Solar Radiation Shield Disassembling the Station Open up the station by removing the mounting bracket as shown in the following illus- tration. Remove the three (3) screws connecting the mounting bracket to the radiation shield. 2" Screws (3) Lock Washers Flat Washers Mounting Bracket...
  • Page 4 Powering the Fan The Fan-Aspirated Temp/Hum Station fan is solar-powered and uses batteries for over- night power storage. Connecting Solar Power Locate the Junction Board on the fan plate (See below). #4 x 1/2" Screw #4 Flat Washer Cable Clamp Sensor Cable SIM Power Cable Solar Panel Cable...
  • Page 5 Installing the Fan Batteries The fan will begin operating as soon as you install the batteries. To prevent discharging the batteries, you should wait until you are ready to mount the station outdoors before installing the batteries. Insert a NiCad battery in each compartment, matching the plus (+) sign on the battery with the plus (+) sign in the battery com-...

  • Page 6: Connecting The Sensors

    Install the Junction Board Cover as shown in the illustration. The Junction Board Cover presses easily into place when you are installing it. Junction Board Cover Installation Note: To remove the cover, press gently in on both sides to release the latches holding it in place.
  • Page 7 Install the first grommet in the left slot in the SIM housing, and install the second grommet in the right slot, adjusting the inside cable lengths as needed for a tidy installation. Refer to the Fan-Aspirated Temp/Hum Station Connections illustration below and connect the temperature/humidity sensor cable as shown below.

  • Page 8: Configuring Communications

    Configuring Communications Each wireless transmitting station must be set to one of eight DavisTalk transmitter IDs, and each station must use a unique transmitter ID. Use the transmitter ID switches #1, 2 and 3 to set the station’s ID. Switch #4 is only used for transmission testing. Note: The transmitter and receiver communicate with each other only when both are set to the same DavisTalk ID.

  • Page 9: Testing Communications

    Setting the Console to ID Note: See the Vantage Pro User’s Manual & Setup Guide: “Setup Mode – Screen 2: Selecting Transmitters” for more detailed instructions. Put your console into Setup Mode — press and hold the DONE key and press the DOWN arrow key.
  • Page 10 Set the switch to the ON position using a ball-point pen or paper clip. When in test mode, an LED indicator light flashes each time the station transmits: • The LED will immediately flash once to show that the light itself functions. •...

  • Page 11: Mounting The Station

    Mounting the Station The Fan-Aspirated Temp/Hum Station can be mounted on a pole or on a vertical surface such as a wooden post, wall or fence. Choosing a Location for the Station Consider the following factors as you choose a location for your Fan-Aspirated Temp/Hum Station: •...
  • Page 12 Mounting on a Pole or Mast For best results, mount to a pole having an outside diameter between 1" and 1-1/4" (25 – 31 mm). Slide the stud ends protruding from the top of the radiation shield through the holes on the mounting bracket.
  • Page 13 Tighten four set of the washers and hex nuts until the mounting bracket is firmly mounted on the pole. 1-1/2" U-Bolts Hold the SIM housing against the pole near the station. Put two U-bolts around the pole and insert the ends through the holes in the back of the mounting bracket. U-Bolts Temp/Hum Solar Power...
  • Page 14 Mounting on a Post or Wall Using four 1/4" x 1-1/2" lag screws (not included), attach the mounting bracket to the surface in the desired location. • Drill holes using a 3/16" (5 mm) drill bit. • Use a carpenter’s level when marking the holes, to ensure that the bracket will be level.
  • Page 15 Secure the station to the mounting bracket using a #8 flat washer, #8 split lock washer and #8 hex nut on each of the stud ends. • Tighten the hex nuts until the station is secure on the mounting bracket. #8 Hex Nuts #8 Lock Washers #8 Flat Washers...

  • Page 16: Installation Options

    Installation Options Batteries The Fan-Aspirated Temp/Hum Station is solar powered and is supplied with two NiCad C-cell batteries. At your option you may decide to install either zero, one, or two C-cell batteries. • Install two fan batteries for maximum length of overnight aspiration but with slightly lower average daytime aspiration.

  • Page 17: Annual Maintenance

    If you are unable to solve the problem, please call Davis Technical Support. We’ll be glad to help. Most questions can be answered over the phone. You can also email us for support or visit our website. Sorry, we are unable to accept collect calls.

  • Page 18: Theory Of Operation

    Theory of Operation The diagram below shows how the Fan-Aspirated Temp/Hum Station draws outside air up through the sensor chamber and between the three walls surrounding the sensor chamber. Cross-section of Fan-Aspirated Radiation Shield Page 18 Wireless Temperature/Humidity Station...

  • Page 19: Specifications

    Secondary (backup) power: ... Optional Vantage Pro AC power adapter Fan-Aspirated Radiation Shield Aspiration Rate, Full Sun ... . . 190 feet/min (.96 m/s) Aspiration Rate, Batteries Only .
  • Page 20 • Consult the dealer or an experienced radio/TV technician for help. Changes or modifications not expressly approved in writing by Davis Instruments may void the user's authority to operate this equipment. Product Number: 6385 Davis Instruments Part Number: 7395.153 Fan-Aspirated Wireless Temperature/Humidity Station Installation Manual Rev.C (June 26, 2003)

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Wireless temperature/humidity station6385

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