Scaled Instruments Davis 7747 Manual Download Page 17

Page: 17 / 20

www.scaledinstruments.com

Figure 19

3. Place the open-end plate on top of the spacers. It may require some extra effort to

ensure the plate is seated at the top of the spacers.

(Fig. 20)

Figure 20

Summary of Contents for Davis 7747

Page 1: ...l Battery Terminals into appropriate slots 11 Place the PCBA into the DFARS and Solder battery connectors 13 Reassemble the radiation shield 15 Reinstall the radiation shield to the ISS 19 Introductio...

Page 2: ...Components Before starting please ensure you have all the necessary components for the conversion This conversion relies on re using parts that are already included with your DFARS so be sure you don...

Page 3: ...RS from the ISS 2 Remove the existing DFARS from the ISS 3 Disassemble the existing DFARS to perform the conversion 4 Install the new components into your DFARS 5 Solder battery wires to the PCBA 6 Re...

Page 4: ...ohibited unless permission explicitly granted www scaledinstruments com 4 Figure 1 3 Disconnect the 2nd Solar Panel wire on the SIM cover from the power lead connected to the DFARS fan Set the SIM cov...

Page 5: ...ww scaledinstruments com 5 4 Remove the foam insert from the cable access port and set it aside Fig 3 Figure 3 5 Disconnect the existing cables from sensor connectors These cables should all be labele...

Page 6: ...unless permission explicitly granted www scaledinstruments com 6 6 For wired models disconnect the console cable from the SIM Fig 5 Figure 5 7 Feed the TEMP HUM cable and the fan power cable through...

Page 7: ...e cone s latches line up with the openings in the base Lift off the rain collector cone and set aside in a safe place Fig 7 Figure 7 9 While supporting the bottom of the DFARS remove the 3 8 32 x 3 1...

Page 8: ...the ISS Be careful there is nothing holding the closed cap plate and open cap plate at the top of the shield at this point Take the DFARS to your work area to perform the conversion 11 Remove the clo...

Page 9: ...ews washers and lock washers from this step as well as the strain relief and its washer screw Fig 10 Figure 10 2 Remove the fan from the housing by simply lifting it 3 Lift the fan plate off of the ex...

Page 10: ...2014 Scaled Instruments Reproduction prohibited unless permission explicitly granted www scaledinstruments com 10 washers will be used in the next step Keep these spacers for later Figure 11 Figure 12...

Page 11: ...fan plate Push the leads through the small hole on each side of each battery bay Remember that the red connector should be installed on the side of the battery bay labeled on the fan plate and the bl...

Page 12: ...d unless permission explicitly granted www scaledinstruments com 12 right hole Fig 14 Figure 14 3 Using a wire stripper strip appx 1 16 additional insulation from each of the leads Twist both red lead...

Page 13: ...he board Solder the red wires to the terminal marked BATT on the RIGHT side of the board It will be necessary to flip the board over to perform the soldering Do the same for the black leads using the...

Page 14: ...d Instruments Reproduction prohibited unless permission explicitly granted www scaledinstruments com 14 3 Turn the fan plate over and use zip ties to tie up any excess wire between battery bays Fig 16...

Page 15: ...he middle of each cover that should face towards the fan for proper orientation Secure each battery cover with 2 4 3 8 self tapping screws Reassemble the radiation shield 1 Take the fan plate and plac...

Page 16: ...the fan plate to the remainder of the stack Place the new solar panel next to the radiation shield and connect its lead to the PCBA terminal marked SOL Guide the wire so it is in the strain relief At...

Page 17: ...ohibited unless permission explicitly granted www scaledinstruments com 17 Figure 19 3 Place the open end plate on top of the spacers It may require some extra effort to ensure the plate is seated at...

Page 18: ...itself is positioned directly over the exit point of the wires from the shield Be sure to use the holes indicated to place the solar panel on top of the shield NOTE Using the wrong set of holes will r...

Page 19: ...r battery power Bring the shield into the sun so the solar panel receives bright light a bright incandescent light can be used as well The fan should run at a higher speed Reinstall the radiation shie...

Page 20: ...n in the block where the access port is 7 Reattach the connector from the top solar panel from the SIM cover included with your DFARS to the appropriate connector on the SIM The wire from the bottom s...