Author Topic: Mass (weight) of outer cylinder  (Read 1075 times)

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Offline miraculon

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Mass (weight) of outer cylinder
« on: September 23, 2019, 03:51:40 PM »
I ordered a new gauge from Lucy for our local school. They are going to begin CoCoRaHS observations as soon as we site the gauge.

I weighed the outer cylinder on the Escali scale that I use for my winter measurements. For my own observations, I have a spreadsheet with the empty weights to simplify the calculation. I put a label with a number and the gram weight for when I take the measurements.

Interestingly, this new outer cylinder weighs in at 458g, which is quite a bit less than my three cylinders. (461-465g) This variation could result in readings being off by 0.01" to 0.03".

I am curious about other WxForum member's outer cylinder weights. The Escali is approved by CoCoRaHS for the "weighing method" of SWE.

I have a "500g" weight that checks in at 501g consistently.

Greg H.


Blitzortung Stations #706 and #1682
CoCoRaHS: MI-PI-1
CWOP: CW4114 and KE8DAF-13
WU: KMIROGER7
Amateur Radio Callsign: KE8DAF

Offline CW2274

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Re: Mass (weight) of outer cylinder
« Reply #1 on: September 23, 2019, 04:26:13 PM »
Can't you just weight the water itself in something common or take into consideration the difference between the gauges?

Offline miraculon

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Re: Mass (weight) of outer cylinder
« Reply #2 on: September 23, 2019, 04:30:53 PM »
Can't you just weight the water itself in something common or take into consideration the difference between the gauges?

When the snow and ice is a frozen mass in the bottom of the outer cylinder, weighing the total and subtracting out the empty weight is the most expedient option.

Otherwise, I would be back to melting the ice/snow of which there is no advantage to the weighing method.

Greg H.


Blitzortung Stations #706 and #1682
CoCoRaHS: MI-PI-1
CWOP: CW4114 and KE8DAF-13
WU: KMIROGER7
Amateur Radio Callsign: KE8DAF

Offline CW2274

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Re: Mass (weight) of outer cylinder
« Reply #3 on: September 23, 2019, 04:34:38 PM »
Can't you just weight the water itself in something common or take into consideration the difference between the gauges?

When the snow and ice is a frozen mass in the bottom of the outer cylinder, weighing the total and subtracting out the empty weight is the most expedient option.

Otherwise, I would be back to melting the ice/snow of which there is no advantage to the weighing method.

Greg H.
Oh that frozen stuff. I have two I'll go weigh for you now. Back in a second....

Offline CW2274

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Re: Mass (weight) of outer cylinder
« Reply #4 on: September 23, 2019, 04:39:03 PM »
460 and 463.

Online galfert

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Re: Mass (weight) of outer cylinder
« Reply #5 on: September 23, 2019, 04:42:25 PM »
This one is brand new. Only a couple months old.

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WS-2000 & WS-2902A | Ecowitt GW1000 | WeatherBridge (Meteobridge)
WU: KFLWINTE111  |  PWSweather: KFLWINTE111
CWOP: FW3708  |  AWEKAS: 14814
Windy: pws-f075acbe
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Online galfert

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Re: Mass (weight) of outer cylinder
« Reply #6 on: September 23, 2019, 04:44:55 PM »
Can't you just weight the water itself in something common or take into consideration the difference between the gauges?

When the snow and ice is a frozen mass in the bottom of the outer cylinder, weighing the total and subtracting out the empty weight is the most expedient option.

Otherwise, I would be back to melting the ice/snow of which there is no advantage to the weighing method.

Greg H.
Oh that frozen stuff. I have two I'll go weigh for you now. Back in a second....

Yeah that frozen stuff that both you and I have never seen. LOL   :lol:
WS-2000 & WS-2902A | Ecowitt GW1000 | WeatherBridge (Meteobridge)
WU: KFLWINTE111  |  PWSweather: KFLWINTE111
CWOP: FW3708  |  AWEKAS: 14814
Windy: pws-f075acbe
Weather Underground Issue Tracking
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Online galfert

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Re: Mass (weight) of outer cylinder
« Reply #7 on: September 23, 2019, 04:48:20 PM »
I don't think it matters if all our gauges are a different weight. The only thing you need to know is what yours weighs to do the subtraction. If you have a pair and swap out then you should know which is which.

But it is rather curious why all of ours are different.
WS-2000 & WS-2902A | Ecowitt GW1000 | WeatherBridge (Meteobridge)
WU: KFLWINTE111  |  PWSweather: KFLWINTE111
CWOP: FW3708  |  AWEKAS: 14814
Windy: pws-f075acbe
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Offline CW2274

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Re: Mass (weight) of outer cylinder
« Reply #8 on: September 23, 2019, 04:48:36 PM »
Can't you just weight the water itself in something common or take into consideration the difference between the gauges?

When the snow and ice is a frozen mass in the bottom of the outer cylinder, weighing the total and subtracting out the empty weight is the most expedient option.

Otherwise, I would be back to melting the ice/snow of which there is no advantage to the weighing method.

Greg H.
Oh that frozen stuff. I have two I'll go weigh for you now. Back in a second....

Yeah that frozen stuff that both you and I have never seen. LOL   :lol:
Bout as rare as our tiny tornado threat out west.

Offline CW2274

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Re: Mass (weight) of outer cylinder
« Reply #9 on: September 23, 2019, 04:51:17 PM »
I don't think it matters if all our gauges are a different weight. The only thing you need to know is what yours weighs to do the subtraction. If you have a pair and swap out then you should know which is which.
That's kinda what I wondering about as well....nevertheless, he apparently has his system.

Offline CW2274

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Re: Mass (weight) of outer cylinder
« Reply #10 on: September 23, 2019, 05:03:38 PM »
But it is rather curious why all of ours are different.
Not positive, but I think they're not all manufactured in the same place. My new one has a blue Stratus sticker on it (463 grams) and the old one does not (460)....for whatever that's worth.

Offline miraculon

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Re: Mass (weight) of outer cylinder
« Reply #11 on: September 23, 2019, 05:03:53 PM »
Quote
If you have a pair and swap out then you should know which is which.

Hence the labels and pre-weighing....

I have a third that I use for the core samples.

Greg H.


Blitzortung Stations #706 and #1682
CoCoRaHS: MI-PI-1
CWOP: CW4114 and KE8DAF-13
WU: KMIROGER7
Amateur Radio Callsign: KE8DAF

Online galfert

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Re: Mass (weight) of outer cylinder
« Reply #12 on: September 23, 2019, 05:53:40 PM »
But it is rather curious why all of ours are different.
Not positive, but I think they're not all manufactured in the same place. My new one has a blue Stratus sticker on it (463 grams) and the old one does not (460)....for whatever that's worth.

Yep my new one also has the Stratus sticker. My new one is still different than your new one. We are off by 10 grams. Good thing we aren't weighing the funnel sticker part, so it is still strange.
WS-2000 & WS-2902A | Ecowitt GW1000 | WeatherBridge (Meteobridge)
WU: KFLWINTE111  |  PWSweather: KFLWINTE111
CWOP: FW3708  |  AWEKAS: 14814
Windy: pws-f075acbe
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Offline CW2274

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Re: Mass (weight) of outer cylinder
« Reply #13 on: September 23, 2019, 06:03:25 PM »
And you can take this for what it's worth also, but my new gauge is always more aligned with my RW111, like scary good.