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Author Topic: Last mounting question, hopefully  (Read 7088 times)

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Bashy

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Last mounting question, hopefully
« on: February 17, 2017, 08:53:28 AM »
Hi, mast coming today so I will be mounting it all, 1 more question, I will be mounting the anemometer with the shaft facing North for ease of alignment then calibrating it, if I mount the solar and uv right below it, when the sun is higher, will the anemometer block the sun at certain times or does the sun not get higher enough to be an problem  there?

Offline broadstairs

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Re: Last mounting question, hopefully
« Reply #1 on: February 17, 2017, 09:49:27 AM »
I would recommend having nothing which could cast any shadow at any time on the solar/uv sensors and that includes the anemometer. I have mine mounted on the roof on my aerial mast with an extension (home made) for my solar sensor so it is above everything. The only issue with mine is that on occasions in summer a blackbird alights on it to sing and completely blocks the sun out  #-o  :roll:

Stuart

Bashy

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Re: Last mounting question, hopefully
« Reply #2 on: February 17, 2017, 10:08:27 AM »
Ha, that was the reason i was thinking about just below the ane' birds, namely pigeons and doves
i have a lot here, ok, i did have a wee inkling that it may be in the way during summer months.

I could mount it a bit lower or use cable ties as a deterrent, if its a bit lower then that will mean later
starts and earlier finished (sun) decisions, decisions lol

Offline mcrossley

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Re: Last mounting question, hopefully
« Reply #3 on: February 17, 2017, 10:46:11 AM »
If it helps, for places in England, the sensors need to be clear of shadow obstructions for approximately 45 degrees either side of North to cater for mid-summer sun rise and sets.
Mark

Bashy

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Re: Last mounting question, hopefully
« Reply #4 on: February 17, 2017, 10:52:37 AM »
Thanks,  according to an app I just downloaded, would you Adam and Eve it, from the bottom of the speed to the bottom of the mount on the mast it's spot on 45 degrees, so it I place it a foot below then that, in theory, should be ok?

Offline mcrossley

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Re: Last mounting question, hopefully
« Reply #5 on: February 17, 2017, 12:02:06 PM »
If I'm understanding you right - yes, you should be OK. In the south of England you have more than 45 degrees to play with anyway, more like a nudge over 50. You aren't going to register sunshine for a period just after sunrise and just before sunset anyway.
« Last Edit: February 17, 2017, 12:03:51 PM by mcrossley »
Mark

Bashy

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Re: Last mounting question, hopefully
« Reply #6 on: February 17, 2017, 12:04:07 PM »
Thanks Mark, appreciate the info....

Offline niko

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Re: Last mounting question, hopefully
« Reply #7 on: February 17, 2017, 03:06:17 PM »
The anemometer stick should face north so I'm confused by the calibration comment. If you mount it that way, and mount the solar/UV on the south side of the mast at a similar height there should be no problem  :?

Bashy

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Re: Last mounting question, hopefully
« Reply #8 on: February 17, 2017, 05:56:27 PM »
I am facing it south, therefore i need to calibrate it to suit...

I have overlooked one major thing though, i though all cables were 4 core, nope, temp/hum is 5 or 6 core, couldnt see properly
its getting dark, thats a bummer cause i have already buried the cable :(

now i have to find somewhere tomorrow that has 6 core cable, pref same colour s and some 6 pin rj11's :/

Offline niko

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Re: Last mounting question, hopefully
« Reply #9 on: February 17, 2017, 06:02:24 PM »
Why do you need a long 6 core?

Bashy

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Re: Last mounting question, hopefully
« Reply #10 on: February 17, 2017, 06:08:15 PM »
To go from temp to the transmitter, transmitter is now on the mast, temp is were OS temp is in the middle

It was easier doing it that way  than having 3 cables from the mast to the temp UV/solar/wind, my way its only 1 cable temp to mast

Its RJ11 6P6C i need aint it RJ11 6P4C is for th other cables right?
« Last Edit: February 17, 2017, 06:13:10 PM by Bashy »

Offline niko

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Re: Last mounting question, hopefully
« Reply #11 on: February 17, 2017, 06:19:41 PM »
I would not recommend separating the temp/hum farther from the transmitter, not a good idea IMHO. That's why the replacement rain gauge base is a really convenient way to split the gauge, it has both shelter and transmitter mount.

Bashy

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Re: Last mounting question, hopefully
« Reply #12 on: February 17, 2017, 06:25:06 PM »
Ah, too late of that lol

Offline weatherc

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Re: Last mounting question, hopefully
« Reply #13 on: February 17, 2017, 06:54:13 PM »
I would not recommend separating the temp/hum farther from the transmitter, not a good idea IMHO. That's why the replacement rain gauge base is a really convenient way to split the gauge, it has both shelter and transmitter mount.

Why not? Its just to extend the 6-core cable like the 4-core one. Nothing special there. Done that w/o problems.
One reason for splitting them apart are also so it not builds up ice between rainpot and temp/hum during the winter whats could break it.
Just FYI, its quite odd Davis not have taken in account that ice-build-thingy in the first place...
« Last Edit: February 17, 2017, 06:59:14 PM by weatherc »

Offline niko

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Re: Last mounting question, hopefully
« Reply #14 on: February 17, 2017, 07:00:57 PM »
Interesting, what distance?

My concern is the VP2 temp/hum uses more complex digital communication interface than the simple switch closure/variable resistance of the anemometer and rain gauge. But I guess it's not an issue after all  :)

Ice build up, in California?  :lol: