Contents

Daytime Fan-Aspirated Radiation Shield Kit Installation Manual
- Introduction
  - Components:
  - Tools Needed
- Prepare to Install Your Fan
  - Put console in Setup Mode
  - Note: If the console acquires erroneous data during the upgrade, see your console manual for instructions on clearing data.
    - Take down the sensor suite
      - 1. Open the transmitter shelter cover.
      - 2. Disconnect the solar panel wire from the cover.
      - 3. Remove the foam insert from the cable access port in the lower right corner of the shelter and set it aside.
      - 4. Disconnect the anemometer cable (labeled WIND) and the temperature/humidity sensor cable from the sensor transmitter and slide the cables out of the cable access port.
      - 5. Cabled sensor suites only: Disconnect the console cable and slide it out of the cable access port.
      - 6. You can now remove the sensor suite from its mounted position. Move it to a safe place to install the Daytime Fan.
    - Disassemble the standard radiation shield
  - Note: We recommend using a workbench or table to perform the following procedures.
    - 1. Remove the rain collector cone from the sensor suite base by rotating the cone counter-clockwise. When the cones latches line up with openings in the base, you can lift the cone off. The cone fits in the base tightly and may require extra press...
    - Tip: Steady the sensor suite base between your knees when removing the cone
      - 2. Remove the three 8-32 x 4'' screws holding the radiation shield plates together. Save these three screws and washers. Separate out the radiation plating. The illustration at left is of a newer model of Vantage Pro2. See below if your temperature/h...
      - Move the temperature/humidity sensor
        
        1. Locate the plate at the top of the radiation shield plating and find the insulating disk with the temperature/humidity sensor on the underside of the radiation shield.
        
        2. Remove the three screws, flat washer, and cable clamp securing the temperature/humidity sensor to the insulating disk. Save the small screw and flat washer for use later.
        
        3. Remove the two screws holding the insulating disk attached on the underside and discard the disk.
        
        4. Reinstall the sensor facing down on the second to bottom-most radiation plate, using the two 1 plastic spacers and #4 screws included with the kit.
        
        5. Replace the radiation plate back in its correct place in the radiation shield plating stack.
  - Note: You do not need to use a cable clamp on the sensor cable when mounted on this plate.
    - Assemble the Lower Section
      - 1. Build the lower section of the new radiation shield by stacking six plates; in this order, from the bottom up: 1: The original bottom plate. 2: The disassembled original top plate (with the insulating disc removed). 3: The plate containing the tem...
  - Note: When stacking plates, make sure their screw standoffs line up with each other.
    - 2. Run the temperature/humidity cable up through the center of the three open plates.
    - 3. Set aside the re-assembled radiation shielding and find the fan plate motor assembly.
    - 4. Attach the three threaded spacers to the fan plate using the three #8-32 x 1/2'' screws and the three #8 washers and #8 lock washers included with the kit.
    - 5. Detach the fan motor cable from the power cable assembly on the fan plate, lift the fan motor out and set it aside. The Daytime Fan Kit comes with the fans power cable connected to the new transmitter shelter cover. Disconnect this cable.
    - 6. Place the fan plate onto the radiation shielding stack..
    - 7. Bring the temperature/ humidity cable over the top of the fan plate with as little slack as possible and press it firmly into the cable channel on the fan plate.
    - 8. Place one of the 4'' screws removed from the original radiation shield and its corresponding #8 lock washer and # 8 flat washer into one of the radiation shield plate holes on the fan plate located just counter-clockwise from a threaded spacer, ma...
    - 9. Turn the screw to engage the threaded insert in the bottom plate.
    - 10. Make sure the other screw standoffs are aligned and then insert the other two 4'' screws and corresponding washers in the same way.
    - 11. Tighten all three screws to securely fasten the bottom section of the radiation shield.
    - 12. Place the fan motor back into place and plug the fan motor cable back into the power cable assembly.
    - 13. Unscrew the cable clamp holding the power cable assembly in place.
    - 14. Thread the temperature/humidity sensor cable into the cable clamp and tighten the screw back down in its original placement.
    - 15. Place the cap plates on top (with the closed one on top) of the rest of the radiation shield and line up their standoffs.
    - 16. Insert one of the 3 1/4'' screws and corresponding lock and flat washers included in the kit hardware into one of the holes in the sensor suite base as show below.
    - 17. Lower the sensor suite base onto the stack so that the screw goes through the standoffs and into the threaded spacers. Turn the screw a few times to engage the threads.
    - 18. Place a lock washer and flat washer on the other two 3 1/4'' screws then insert them through the other two screw holes.
    - 19. Tighten all three screws to securely fasten the radiation shield to the sensor suite base.
- Finishing Steps
  - 1. Install the rain collector cone and lock it in place.
  - 2. Slide the fan units power cable, the anemometer cable, and the temperature/humidity sensor cable and through the cable access port of the sensor transmitter.
  - Tip: If you have trouble getting all the sensor cables into the access port, make sure all the installed cables are pushed to the left of the access port. Try inserting the three cables through the access port in this order: fan power cable, anemomet...
    - 3. Reconnect the temperature/humidity sensor cable.
    - 4. Close the sensor transmitter cover temporarily without connecting the solar panel cables.
    - 5. Test communication between the sensor suite and the console. To test communication, take the console out of Setup Mode and make sure the console is receiving data from the sensor suite. See your sensor suite manual for more information on testing ...
    - 6. Reinstall the sensor suite in its previous location.
    - 7. Open the sensor transmitter cover and discard it.
    - 8. Reconnect the WIND (anemometer) cable.
    - 9. Cabled sensor suites: Connect the console cable.
    - 10. Find the new sensor transmitter door that came with your fan kit. Connect the wire coming from the top solar panel on the cover to the sensor transmitter board as shown below.
  - Note: This wire is not needed on cabled Vantage Pro2. For cabled systems, you should secure it where it will not interfere with the SIM box.
    - 11. Connect the wire coming from the bottom solar panel to power cable assembly in the sensor transmitter.
    - 12. Reinsert the foam into the cable access port in the sensor transmitter.
    - 13. Close the sensor transmitter.
    - 14. Use cable ties to secure cables.
    - 15. Make sure the fan blades are rotating by directing the transmitter cover to sunlight or by shining a bright incandescent light on the solar panel. You should hear a slight whir if the fan is running.
    - Tip: Make sure to take the console out of Setup Mode. Refer to your Vantage Pro2 Console Manual for more information on clearing any erroneous data from the console.
      - Guidelines for Securing Cables
      - Securing Cables
  - Note: Do not use metal staples or a staple gun to secure cables. Metal staplesespecially when installed with a staple gunhave a tendency to cut the cables.
- Maintenance
  - Annual Maintenance
    - 1. Remove your fan-aspirated sensor suite and place on a stable work surface.
    - 2. Check to see if the fan motor is still working. If it is not running, replace the motor with a new motor (# 7758).
    - 3. Disassemble the radiation shield.
    - 4. Remove any debris lodged inside the unit.
    - 5. Clean the surfaces of the radiation shield with a damp cloth.
    - 6. Reassemble the radiation shield.
    - 7. Re-install the sensor suite in its previous location.
- Contacting Davis Instruments
  - Note: Please do not return items to the factory for repair without prior authorization.

Davis Vantage Pro 7747 Installation Manual

Davis Vantage Pro 7747 Radiation Shield manual cover

Pages 12

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Davis Vantage Pro 7747 Radiation Shield Specification

The Davis Vantage Pro 7747 Radiation Shield is engineered to enhance the accuracy of temperature and humidity sensors used in various meteorological and environmental monitoring applications. This shield is designed to minimize the effects of solar radiation and precipitation on sensor readings, ensuring precise data collection. Constructed from durable, UV-resistant materials, the shield effectively reflects solar radiation, maintaining the integrity of the sensors housed within.

The shield's structure allows for optimal air flow around the sensors, promoting accurate temperature and humidity measurements by reducing the heat build-up that can occur when sensors are exposed directly to sunlight. It is compatible with a range of Davis sensors, integrating seamlessly into existing setups. Installation is straightforward, with the shield accommodating both pole and flat surface mounting options, offering flexibility for diverse monitoring environments.

With dimensions specifically tailored to encase the sensors without obstructing their function, the Davis Vantage Pro 7747 Radiation Shield maintains a balance between protection and exposure necessary for reliable data. Its lightweight, yet robust construction ensures longevity and minimal maintenance in various weather conditions. This radiation shield is suitable for use in both professional meteorological stations and personal weather monitoring systems, providing an essential component for anyone requiring consistent and accurate environmental data.

Davis Vantage Pro 7747 Radiation Shield F.A.Q.

How do I properly install the Davis Vantage Pro 7747 Radiation Shield?

To install the Davis Vantage Pro 7747 Radiation Shield, ensure that it is mounted on a stable surface, away from any obstructions that could affect air flow. The shield should be installed at a height of 4 to 6 feet above ground level for accurate readings.

What maintenance is required for the Davis Vantage Pro 7747 Radiation Shield?

Regularly inspect the radiation shield for any debris or dirt accumulation, especially in the slats. Clean the shield with soapy water and a soft brush to maintain optimal performance. Check for any signs of wear or damage.

Can the Davis Vantage Pro 7747 Radiation Shield be used with other sensors?

Yes, the Davis Vantage Pro 7747 Radiation Shield is designed to accommodate a variety of temperature and humidity sensors, provided they fit within the shield's dimensions. Ensure compatibility before installation.

How do I troubleshoot inconsistent temperature readings with my radiation shield?

Check for blockages in the shield that may impede air flow. Ensure the shield is not exposed to direct sunlight or reflective surfaces. Verify that the sensor is securely mounted and functioning correctly.

Is the Davis Vantage Pro 7747 Radiation Shield weatherproof?

Yes, the Davis Vantage Pro 7747 Radiation Shield is designed to withstand various weather conditions, including rain, snow, and UV exposure, without affecting its performance.

What is the purpose of the Davis Vantage Pro 7747 Radiation Shield?

The Davis Vantage Pro 7747 Radiation Shield protects temperature and humidity sensors from solar radiation and precipitation, ensuring more accurate environmental measurements.

How do I clean the Davis Vantage Pro 7747 Radiation Shield?

To clean the shield, remove it from the mounting post and use mild soapy water with a soft brush to gently scrub away dirt and debris. Rinse with clean water and allow it to dry before reinstallation.

What should I do if the shield gets damaged?

Inspect the damage to determine if it affects the shield's functionality. Small cracks can be sealed with weatherproof adhesive, but significant damage may require replacement to ensure accurate sensor readings.

Can the radiation shield be painted to match my installation site?

Painting the radiation shield is not recommended as it can affect its thermal properties and impact sensor accuracy. If aesthetics are a concern, consider placement options that minimize visual impact.

How can I improve the accuracy of my sensor readings with the Davis Vantage Pro 7747 Radiation Shield?

Ensure the shield is clean and free from obstructions. Install the shield in an open area with good airflow and away from surfaces that could affect temperature readings, like concrete or asphalt.