In those situations where a conversion can be done, rather than a direct drop in replacement, it usually takes some electronic magic. Davis made a unit to take an NRS or RM Young wind monitor and simulate it being a Davis weather sensor package.
A gentleman in Florida did a whole bunch of programing to make a Davis head look like a Heathkit ID-4001 or 5001, but he did that for a living. This is going to be tough since I don't know if anyone is privy to the actual workings of how the Peet Bros figures out the angle from the pulses. I can see the concept but have no idea how to emulate it. On Thursday, November 19, 2020 at 1:18:04 PM UTC-6 chris.th...@gmail.com wrote: > Well thanks for the info > I did wonder that it's probably be different. > Thanks again > Not sure where that leaves me > > On Thursday, 19 November 2020 at 18:20:36 UTC daleea...@gmail.com wrote: > >> From my knowledge, the answer is no. >> >> The Davis uses pulses to signal wind speed, and the Peet Bros does, too. >> >> The major difference is that the Davis uses the much more traditional >> potentiometer to deliver a voltage and the ISS reads that to convert to a >> wind direction. >> >> The Peet Brothers does something much more difficult and very different. >> It times when one of the magnets makes or breaks and then depending upon >> the time until it pulses again, determines the angle of rotation through >> which the wind speed magnet has rotated, simplified explanation. >> Therefore, if there is no rotation of the wind speed magnet, there cannot >> be a determination of which direction the vane is pointing, unlike a >> no-wind condition for a Davis, which of course will give a voltage on the >> wind direction sense line. >> >> Very odd, but seems to work for them. If you go to Davis's web site, >> there is a better explanation of how they designed their unit. It >> certainly gets rid of the potentiometer and it wearing out, but the timing >> circuitry to measure the angle has to be a bit more complicated. >> Dale >> >> >> On Thursday, November 19, 2020 at 3:00:46 AM UTC-6 chris.th...@gmail.com >> wrote: >> >>> >>> Hi Guys, anyone know if you can use a davis wind vane on a ultimeter >>> 2100? >>> My wind vane has broken again, this one didn't last long (about 6 >>> months, 1 year maybe) >>> It's difficult and expensive to get these in the UK, have to import etc. >>> >>> So would like to try something else instead. >>> >> -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/3c177509-6121-4a4b-9abd-7ed46ee3b97an%40googlegroups.com.
