Miscellaneous Debris > Tech Corner
Surge suppressor for wired PWS.
Wx4U:
Dan
Do you think your surge protector would work between the wind sensor and the thermo-hygro sensor to provide some protection to the thermo-hygro sensor? Could you test it just to insure the wind data flows through the surge protector to the therom-sensor thence to the display?
Thanks, Bob
DanS:
Bob, yes, it does pass data in line there as well. Just make sure the fuses are low resistance by checking with an ohmmeter (multimeter) when you're installing them. My test showed that it worked with using the supplied anemometer rj-11 cable only, no extensions. Not sure it will work though if you have the run extended and insert the surge suppressor.
Good luck,
Dan
Mark / Ohio:
--- Quote from: DanS on April 27, 2010, 07:59:40 AM ---.... In my (extremely) broken Thai I was trying to explain what I was doing and needed to him when he looked at me and said, "yes we have varistors here, what size do you want?" His English was so good. Shocked me. I've been dealing with this guy for years and never knew we could speak to each other. :roll: ...
--- End quote ---
:lol: All this time he's been helping you practice Thai but he finally just gave up.
Wonder if that would work on the Serial data line from the Davis VP data logger to the computer?
My serial cable runs about 25' from my console in the bedroom to the computer in the basement. Several years ago I lost one serial port on the computer after a close strike but fortunately the data logger itself did come back to life after a power down reset. I suspect the lightning might have been close enough to induce a voltage on the line that caused the problem. The serial port was the only thing damaged in the house.
DanS:
Mark, this should work fine for your rs-232 application but the TVS diodes and the varistors ratings need to be bumped up a notch to work right with the slightly higher voltage. The TVS diodes could be 15.ke15ca or 1.5ke18ca (15 or 18 clamp voltages) and the varistors v22va2 for near 14 volt clamping. That's a pretty long run and it may help.
DanS:
I just grabbed those values with the thought that a standard P.C. power supply is supposed to provide no more than 12vdc and you should try to clamp above but close to that.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version