"Proper" Ice Bath at 36 Deg F (not)

Started by Hawaii596, 03-02-2015 -- 09:56:47

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Hawaii596

03-02-2015 -- 09:56:47
As I wrote a Cal Lab Magazine article on proper ice bath prep, please know I do not agree with the contents of the following video.  But to a well trained metrologist, it is funny:

https://www.youtube.com/watch?v=PHGIrXqVjw0

"I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind."
Lord Kelvin (1824-1907)
from lecture to the Institute of Civil Engineers, 3 May 1883

metrologygeek

#1
03-02-2015 -- 11:51:51
In my reply to this video I didn't have time or inclination to go into every detail of constructing a useable ice bath, but when I saw his crappy round ice "cubes" floating in water in a 7-11 mug, I just about fell off of my chair laughing. The guy needs help... 

Hawaii596

#2
03-02-2015 -- 12:10:10
I have had such a laugh from this this morning.  Our entire lab has viewed this today to instruct them in what not to do.
"I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind."
Lord Kelvin (1824-1907)
from lecture to the Institute of Civil Engineers, 3 May 1883

Bryan

#3
03-02-2015 -- 12:15:31
36 because of global warming?  I didn't make it past that. 
The science is settled.

jimmyc

#4
03-03-2015 -- 08:48:13
https://www.youtube.com/watch?v=KYOJayWqB3g ps i have always used an ice crusher to make the ice even smaller than a gumball but according to nist this is not necessary????

Hawaii596

#5
03-03-2015 -- 08:59:01
Not to give any further credence to the whole thread, but I noticed in the NIST thread that they recommended no larger than gumball size.  According to some other recognized institutions' documents, they recommend sometimes as fine as snow.  My thinking is that smaller can always work, where larger may not.  Also, I just briefly perused the NIST video (have to watch it again).  So I didn't note if they recommended a drain hose or not.  There are, apparently, a number of variations recommended for good ice baths (among them not being the one by the person on youtube).
"I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind."
Lord Kelvin (1824-1907)
from lecture to the Institute of Civil Engineers, 3 May 1883

metrologygeek

#6
03-03-2015 -- 09:32:15
In my temperature lab we have a Scotsman industrial ice shaver plumbed to the output reservoir of the still. This is the kind used to make ice packs in PT clinics. The key to repurposing one of these is to replace all the metal (non-stainless steel) bits and hard plumbing lines with plastic. If your water is pure enough to use for an ice point then it will both leach contaminants into the water as well as corrode the brass or other metals into swiss cheese pretty rapidly. The shaved ice makes a great slurry and a dewar made up in the morning will still be useable at the end of the day if you pay attention to siphoning out excess water and replacing it with more shaved ice during the day.

NC-Cals

#7
03-05-2015 -- 07:46:54
I never knew there was a standard size for a gumball. Is that an English or a Metric scale gumball. This stuff is so confusing.

lonewolf

#8
04-15-2015 -- 15:40:38
LMAO funny video....
I use ice made from distilled water thru a Waring IC70 ice crusher into a beaker with some distilled water on top of a Magnetic Stirrer, and I monitor the temp with an Omega 2165A...

hey works for me :)

CalLabSolutions

#9
04-18-2015 -- 06:56:06
You have to ask.. What is in the water?

I mean, what is in the water he is drinking?
Michael L. Schwartz
Automation Engineer
Cal Lab Solutions
  Web -  http://www.callabsolutions.com
Phone - 303.317.6670

Hawaii596

#10
04-20-2015 -- 09:28:49
When I make my ice baths I also have a set of ice cube trays, bins, etc. that have never had anything other than distilled water in them.  I have a 10 Ampere food processor that also has never been used with anything other than distilled water.  We tested one of my ice baths with a well calibrated RTD that had been characterized with a Triple Point of Water, and monitoring with a Fluke 8508A with all the proper coefficients programmed in.  And I got better than +/-0.002 Degrees C.  For a while, it was sitting right at zero.  Since there is the uncertainty of all the other included instruments, that made me a believer (not in the youtube method, of course).  But careful attention to detail does make a difference.
"I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind."
Lord Kelvin (1824-1907)
from lecture to the Institute of Civil Engineers, 3 May 1883
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