brianblack
Well-known member
Hey everyone check out this thread
http://www.reeffrontiers.com/forums/showthread.php?t=19518
http://www.reeffrontiers.com/forums/showthread.php?t=19518
Refractometer calibration
- Thread starter brianblack
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brianblack
Well-known member
brianblack
Well-known member
Crap everytime I go I freakin forget this stuff!!!!!!!!!!1
brianblack
Well-known member
I remembered to get some fluid just no time today ---
brianblack
Well-known member
I just stole this from BOOMER
It does not make any difference what it is made of but std solutions for seawater are KCl. If a 53ms is used to calibrate a conductivity meter and if you make up a salt mix at 53mS and the refract reads 1.026, which it should in that salt mix and if the refract reads the same in 53 mS solution as does in the salt mix, it is the same and can be used for the refract. Billy is going to get some extra and try it on hydrometer.
All you would need to do is take the solution and put it on the refract and turn the cal screw until the refract says 1.026 or 35ppt (3.5%). It is not impossible to make up a solution for all three. All it needs to do is give the same values as NSW. Since the refract is based on NaCl, if you now try to zero it in RO/DI it will not be zero but below zero. Reason, the scale on the refract is a NaCl scale and not a NSW scale.
What happen was this. Some guy took his 53mS and put it on the refract and was surprised at the reading. We told him you can not use a 53mS for refracts. He e-mailed Lou who has now stated flatly that you can use the 53mS for refracts, as he did some more checking and testing in the last day.
It does not make any difference what it is made of but std solutions for seawater are KCl. If a 53ms is used to calibrate a conductivity meter and if you make up a salt mix at 53mS and the refract reads 1.026, which it should in that salt mix and if the refract reads the same in 53 mS solution as does in the salt mix, it is the same and can be used for the refract. Billy is going to get some extra and try it on hydrometer.
All you would need to do is take the solution and put it on the refract and turn the cal screw until the refract says 1.026 or 35ppt (3.5%). It is not impossible to make up a solution for all three. All it needs to do is give the same values as NSW. Since the refract is based on NaCl, if you now try to zero it in RO/DI it will not be zero but below zero. Reason, the scale on the refract is a NaCl scale and not a NSW scale.
What happen was this. Some guy took his 53mS and put it on the refract and was surprised at the reading. We told him you can not use a 53mS for refracts. He e-mailed Lou who has now stated flatly that you can use the 53mS for refracts, as he did some more checking and testing in the last day.
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