Hello all, I am curious of the type of anemometer or data logging device that could dislpay wind speed along with the information that will be provided on the classics online display?
Cdog
Quote from: cdog on January 11, 2011, 09:00:33 PM
Hello all, I am curious of the type of anemometer or data logging device that could dislpay wind speed along with the information that will be provided on the classics online display?
Cdog
Anemometer capability will be available for use on a Classic with a future software upgrade.... Hopefully very soon.
Planned anemometers will be the NRG #40 and reed-switch type anemometers like the APRS World anemometer.
The connection will be into the Aux 2 terminal. Wind speed and logging will be available on the display and over the Ethernet/internet connection.
boB
Thanks, this will be a great feature,looking forward to this.
I cuurently have a anemometer from maximum, when I went to the nrg site I couldnt help but notice the sender looks virtually identical to mine, is this likely I already have an appropriate sender?
Quote from: cdog on January 15, 2011, 07:33:55 PM
I cuurently have a anemometer from maximum, when I went to the nrg site I couldnt help but notice the sender looks virtually identical to mine, is this likely I already have an appropriate sender?
If you can post the particulars of the voltage and frequencies that correspond to the windspeed from the Maximum anemometer, we'll see if we can possibly put that capability in there too. It may not be a big deal. I'm not familiar with that one.
boB
NRG seems to manufacture senders for quite a a few folks.
It's possible the Maximum is in reality, an NRG40
Cheers!
That is exactly how it looks to me, I am going to email them tomorrow.
I received a reply with the specs, it is not the same, but I will forward the info tomorrow..
I can't seem to post the PDF, Bob, can you give me an email where I can send it, thanks,
Cdog.
customerservice at midnitesolar.com
Quote from: TCarp on January 16, 2011, 10:15:15 PM
NRG seems to manufacture senders for quite a a few folks.
It's possible the Maximum is in reality, an NRG40
Cheers!
I just saw a picture of supposedly their anemometer. I see why you would think it might actually be an NRG !! Looks just like it !
boB
Email sent, hopefully adequate info...
Their unit is about half the price of the other, it may be a suitable option?
Quote from: cdog on January 19, 2011, 09:08:11 AM
Email sent, hopefully adequate info...
Their unit is about half the price of the other, it may be a suitable option?
I just got it ! I believe it is similar enough to the NRG #40 that when we get the Classic working with the NRG, this one should be a simple matter of changing a number or two. How high of peak to peak voltage does it produce, in, say, 50 MPH winds ?
Any 2 measurements at 2 different wind speeds might be enough to extrapolate for higher wind speeds.
I wonder if electrically loading these types of anemometers down too much reduces their speed ? Probably not, but I will have to try that with our NRG unit.
boB
The APRS World anemometer sensors are pulse output types, not voltage types. They calculate wind speed by converting from seconds-per-pulse to pulses-per-second (frequency), then to speed.
Quote from: tallgirl on January 23, 2011, 08:07:50 PM
The APRS World anemometer sensors are pulse output types, not voltage types. They calculate wind speed by converting from seconds-per-pulse to pulses-per-second (frequency), then to speed.
I have one of those.
These NRG #40 and this Maximum anemometers are actual generators that generate a sine wave which is what I was wondering about.
I have an NRG #40 here at home that has been running for a couple of years. I doubt that loading it down reduces its RPM at all but
not sure I would be able to really tell unless I had another one mounted in the exact same spot which isn't possible.
Quote from: boB on January 23, 2011, 08:40:05 PM
I have one of those.
These NRG #40 and this Maximum anemometers are actual generators that generate a sine wave which is what I was wondering about.
I have an NRG #40 here at home that has been running for a couple of years. I doubt that loading it down reduces its RPM at all but
not sure I would be able to really tell unless I had another one mounted in the exact same spot which isn't possible.
Finding out the actual specifications for anemometers seems to be a non-trivial exercise. However, any anemometer that produces power is going to be affected by the load from the sensing gear. I'm wresting with a number of sensors right now and making sure their voltage outputs aren't affected too much by different A/D converters has been giving me an excuse to get out the voltmeter and sit outside. Now if I could just find a Fluke that has an Ethernet connection I'd be happy. Or at least comfortable.
Quote from: tallgirl on January 30, 2011, 04:09:57 PM
Quote from: boB on January 23, 2011, 08:40:05 PM
I have one of those.
These NRG #40 and this Maximum anemometers are actual generators that generate a sine wave which is what I was wondering about.
I have an NRG #40 here at home that has been running for a couple of years. I doubt that loading it down reduces its RPM at all but
not sure I would be able to really tell unless I had another one mounted in the exact same spot which isn't possible.
Finding out the actual specifications for anemometers seems to be a non-trivial exercise. However, any anemometer that produces power is going to be affected by the load from the sensing gear. I'm wresting with a number of sensors right now and making sure their voltage outputs aren't affected too much by different A/D converters has been giving me an excuse to get out the voltmeter and sit outside. Now if I could just find a Fluke that has an Ethernet connection I'd be happy. Or at least comfortable.
Since A/D converters are relatively high input impedance, I wouldn't think they would load things down to the point of giving false results, but it's possible I suppose, especially if that "instrument" doesn't have a decent buffer on its output.
As for the NRG 40 anemometer, I will stick it in front of a fan so I have steady speed, flash a strobe light on it (WoW, far out man !!) and then short its leads to see if it slows down at all. Should be an interesting experiment.
boB