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Making Sensors Work Underwater

Making Sensors Work Underwater. Fred Donelson Kevin McKone. Why Have Sensors?. Study Wildlife. Investigate Archeological Finds. Monitor/Evaluate Equipment. Map the Sea Floor. Study Climate/Circulation Effects. There are LOTS of types of Sensors!. Temperature Pressure Dissolved O 2

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Making Sensors Work Underwater

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  1. Making Sensors Work Underwater Fred Donelson Kevin McKone

  2. Why Have Sensors?

  3. Study Wildlife

  4. Investigate Archeological Finds

  5. Monitor/Evaluate Equipment

  6. Map the Sea Floor

  7. Study Climate/Circulation Effects

  8. There are LOTS of types of Sensors! • Temperature • Pressure • Dissolved O2 • Dissolved CO2 • Various types of salts • Conductivity • And many, many more …

  9. So let’s hook one up to our ROV!

  10. Here’s the Big Picture: We want to make a sensor connector that will • be powered by our laptop USB port or controller card • easily hook up to several different types of Vernierprobes • enable users to quickly swap out tools/probes during or after a work session

  11. Here is the basic idea: Wires come from computer CAT5 on left and go to sensor on right

  12. Here We’ve Opened the Connector Opening the connector reveals wires with snap connectors

  13. Unsnap the Connectorsto Make a Swap!

  14. Some of the basic parts we need:

  15. We will also need: • Plumbers putty • PVC primer and cement • A hot plate or pan that can be made into a double boiler • A beaker or container in which to melt wax • A six terminal barrier strip

  16. Let’s start with a Verniersurface temperature probe

  17. First, Cut the Wire in Half and Strip Back the Outer Shield

  18. Here are 3 different sensors:Notice they all have six wires, making them interchangeable!

  19. Now, Let’s Put the Parts Together!

  20. Drill a hole in both end caps just large enough for the probe wires

  21. Next, cut two pieces of 1” PVC pipeEach one should be around 12 cm long

  22. Now obtain some PVCprimer and cement

  23. Prime the end of the PVC pipes and the inside of the adaptors

  24. Then apply PVC cement and push them together

  25. You should now have both halves together (both male and female ends)

  26. Next, thread the probe wire through the end cap so that the wires come out the female adapter

  27. Be sure you use the female side!

  28. Use some clay or plumbers putty to plug the hole on the end cap side

  29. Place the tube clay-side downin a container

  30. Melt some wax until liquid and pour into the open end, filling the tube approximately ½ full

  31. Remember: Hot waxisHOT!!

  32. Repeat the process on the male end with the CAT5 cable

  33. Add the clay …

  34. Pour the wax and let cool and solidify

  35. Now to add the snap connectors ...

  36. Double the wire, slide into the connector, and then clamp on with pliers or other clamping tool

  37. Be sure to put the male ends on the male adapter end of the tube

  38. Attach the female connectors to the probe end (female adaptor side)

  39. Use a six-terminal barrier strip to connect the top of the CAT5 to the computer side of the wire for the probe

  40. Connect the computer end of the probe (left) to your CAT 5 wire in your tether (on the right). You only need 6 wires.

  41. Here’s a close up view. Remember the order so you can connect the wires the same way in your connector

  42. Now connect the correct CAT5 wires to the sensor probe wires in the same way

  43. Next, grab some plumbers putty

  44. Place the putty around the male adaptor, then screw two ends together

  45. The finished product should look something like this!

  46. Now to hook it all together …

  47. First, the Go-Link to the USB port:

  48. Then the computer/CAT5 end of the probe to the Go-Link:

  49. Go-Link on left … CAT5 on right

  50. Through the CAT5 wire in our teather…

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