Whats correct and whats not ?

[tinman]

ok i have been using a refractometer and always used RO water to calibrate it ..

used RO water even now and it shows at 1.0 sp gravity

and now today i recieved the calibration fluid from amazon and it shows the sp gravity at 1.030.

i also know calibration fluids do have a shelf life and well not sure it is correct ..


which one is correct ?? im sooo lost .. what should i do now ??

 

[trackfast]

I usually use just the calibration fluid. I did recently use RO water to check the 0 reading and my refrac. was dead on with both readings.

 

[ColaAddict]

you can google studies that show using RO water can yield false results. I only trust calibration fluid as long as it's a trusted brand.

 

[Pufferpunk]

http://blog.captive-aquatics.com/ca...bration-the-myth-and-risks-of-using-rodi.html

 

[tinman]

you can google studies that show using RO water can yield false results. I only trust calibration fluid as long as it's a trusted brand.

It's American pinpoint

But here is my question ... Calibration fluids might go wrong but we all know sp.gr of pure water is always supposed to be 1 isn't it ??

 

[labas39]

I double check with both. Frankly, they always have come out the same.

 

[tinman]

Well an update ..

looks like the calibration solution i recieved is bad.

i took the Refractometer to Ted ( SkillV) and he calibrated it with his calibration solution and my refractometer is spot on ..

Thanks Ted for your time

 

[SkullV]

Well an update ..

looks like the calibration solution i recieved is bad.

i took the Refractometer to Ted ( SkillV) and he calibrated it with his calibration solution and my refractometer is spot on ..

Thanks Ted for your time

Anytime man! You're pretty close so feel free to text me anytime.