FAN-ASPIRATED WIRELESS TE M P E R A T U R E /H U M I D I T Y S TA T I O N INSTALLATION MANUAL, REV C 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 provides step-by-step instructions for installing your Fan-Aspirated Temp/Hum Station.
#4 Self-Threading Screws (4) Battery Covers (2) 3 Volt Lithium Battery 1.2 Volt Nicad Batteries (2) O-Rings (2) #8 Hex Nuts (3) #8 Lock Washers (3) 1-1/2" U-Bolts (2) #8 Flat Washers (3) 1/4" Flat Washers (4) 1/4" Hex-Nuts (4) Components, Part 2 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.
Preparing the Solar Radiation Shield Disassembling the Station Open up the station by removing the mounting bracket as shown in the following illustration. 1. Remove the three (3) screws connecting the mounting bracket to the radiation shield. 2" Screws (3) Lock Washers Flat Washers Mounting Bracket Solar Power Cable Closed Plate (no hole in center) Open Plate (hole in center) Direction of air flow Fan Plate Sensor Cable Battery Compartment Junction Board Removing the Mounting Bracket 2. 3.
Powering the Fan The Fan-Aspirated Temp/Hum Station fan is solar-powered and uses batteries for overnight power storage. Connecting Solar Power 1. Locate the Junction Board on the fan plate (See below). Fan Plate Battery Compartments #4 x 1/2" Screw #4 Flat Washer Cable Clamp Fan Motor Sensor Cable Battery Wires Junction Board SIM Power Cable Solar Panel Cable Solar Panel Connector Solar Power Cable Routing 2. Connect the solar power cable to the VSOL connector on the Junction Board.
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. 1. 2. 3. 4. #4 Screws Air Flow Insert a NiCad battery in each compartment, matching the plus (+) sign on the battery with the plus (+) sign in the battery compartment. Verify that the fan is blowing air up and away from the Temp/Hum sensor.
2. 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 Note: Press in on Sides near latches to install or remove cover. Junction Board Junction Board Cover Installation Note: To remove the cover, press gently in on both sides to release the latches holding it in place. 3. 4. 5.
4. 5. 6. 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. Connect the Solar Power Cable to the SIM as shown below.
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. Setting the Transmitter ID The factory default transmitter ID is “1”.
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. 1. 2. 3. 4. 5. Put your console into Setup Mode — press and hold the DONE key and press the DOWN arrow key. The console will display Screen 1: Transmitters. You should see the words: “RECEIVING FROM...” and “STATION NO.” followed by the transmitter IDs that your console detects.
5. 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. 6. 7. • Then it will flash each time the transmitter broadcasts a signal, which should be every 10 seconds. If the LED flashes only once and then remains dark, there is a problem with the transmitter. Refer to Troubleshooting on page 17.
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: • Mount the station facing South in the Northern Hemisphere and Facing North in the Southern Hemisphere. • Mount the station so that the solar panel receives the most available direct sunlight throughout the day.
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). Mounting Bracket #8 Hex Nuts #8 Lock Washers #8 Flat Washers Attaching Temperature/Humidity Station to Mounting Bracket 1. 2. 3. 4. 5. Page 12 Slide the stud ends protruding from the top of the radiation shield through the holes on the mounting bracket.
6. Tighten four set of the washers and hex nuts until the mounting bracket is firmly mounted on the pole. 1/4" Hex Nuts 1/4" Flat Washers 1-1/2" U-Bolts Mounting the Radiation Shield on a Pole 7. 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 1/4" Flat Washers 1/4" Lock Washers 1/4" Hex Nuts Temp/Hum and Solar Power Cables Mounting the SIM Housing on a Pole 8.
Mounting on a Post or Wall 1. 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. Not included, but requred for wall or post mounting: 1/4" x 1-1/2" Lag Screws (4) 1/4" x 1-1/2" Lag Screws OR Mounting Bracket Attaching Mounting Bracket to a Post 2.
3. 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.
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. • Install only one fan battery for some overnight aspiration but with slightly higher average daytime aspiration.
Annual Maintenance We recommend replacing the fan motor and fan batteries once a year. 1. 2. 3. 4. 5. 6. 7. 8. 9. Retrieve your Fan-Aspirated Temp/Hum Station and place on a stable work surface. Disassemble the Radiation Shield (See page 3). Clean any debris lodged inside the unit. Unplug the old motor and remove from it from the Radiation Shield (See page 5). Install the new motor/fan assembly (#7758) and plug it into the Junction Board (See page 5). Remove the old fan batteries (See page 5).
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.
Specifications Temperature and Humidity Station Temperature range: . . . . . . . . . . . . . . . . . –40 to 140° Fahrenheit (–40 to 60° Celsius) Wireless transmission frequency: . . . . . . . 916.5 MHz, (868.35 MHz for overseas version – Product # includes “XA”) Transmitter ID codes: . . . . . . . . . . . . . . . 8 user-selectable License: . . . . . . . . . . . . . . . . . . . . . . . . . . low power (less than 1 mW), no license required Primary power input: . . . . . . . . . . . . . . . .
FCC Part 15 Class B Registration Warning This equipment has been tested and found to comply with the limits for a class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
