Free refractometer salinity standard available at future BRS meetings

[Greg Hiller]

If you need to recalibrate your refractometer, you are welcome to take some of the club's refractometer salinity standard home with you from the next meeting. We ask that you bring a small, clean, and 'well-sealable' container, and take no more than 20 ml or so. We will not have containers at the meeting for you, so if you forget, you are out of luck.

 

[mloebl]

Greg,

Silly question but what level is the solution calibrated too?

Thanks,

-Mike

 

[Rays]

35 ppt I asked just before we left. My refractometer was off by 5 ppt, no wonder Greg's test read 1.021.

 

[mloebl]

35 ppt I asked just before we left. My refractometer was off by 5 ppt, no wonder Greg's test read 1.021.

Mine is reading 1.020 as well...

-Mike

 

[Yaktop]

I always thought distilled water was at 0 ppt. that isnt valid ?

 

[Greg Hiller]

I think it's best to check both the zero, and the high end. The more important point is the high end.

 

[mloebl]

I recalibrated mine when bringing the calibration solution up a bit (it was really cold from being in the car) and now I know what it's supposed to be... It wasn't as bad as I thought; 1.023 which still isn't perfect, but felt a little better

-Mike

 

[Alex]

I'm confused. What should the calibration fluid read when I use it in my refractometer?

 

[Alex]

Never mind I never noticed the ppt side.

 

[smithcreek]

Will this be available every meeting? I'd like to get some.

 

[Greg Hiller]

It will be at every meeting. I'll make more when we run out. It will be in the club's chemistry kit.

 

[Kevin McG]

Awesome!!

 

[Aquadiva]

Great meeting today.

Went away with some of the calibration fluid, and I seem to have a problem. If I calibrate to the fluid, I get the salinity they tested at the meeting. 1.023.

Problem is, If I just use the RO/DI I am under 0. I read above that the higher number is more important. Should I just ignore the zero altogether, or could there be something wrong with the refractometer.

Thanks

 

[reefsmurf]

Mine is reading 1.020 as well...

-Mike

After adjusting the screw on my refractometer, also found out my tank is only 1.020. oops.

Thanks for the free solution.

 

[waltm]

http://www.reefkeeping.com/issues/2006-12/rhf/index.php

This will probably tell you more than you ever wanted to know about refractometer errors.

 

[Aquadiva]

Thanks. That was extemely helpful even though I only understood about half of what he was talking about.

 

[smithcreek]

The salinity standard is a great thing to have at meetings, thanks. Mine was off about .002. Thought I was running 1.026 but I've been at 1.024.

 

[AngeloM]

So it says to use 1/4 cup of Morton's Iodized Salt. And then add 1tsp of "salt".

Is that teaspoon of "salt"... table salt or reef salt?