Refractometer

[MarkW19]

I've got an RHS-10ATC.

Does it ever need to be re-calibrated? If so, how often?

 

[reefrunner69]

I calibrate mine each time I use it, but it's never off, I've had it for over a year and I've never had to adjust it after I did it initially, but I want to know it's right each time I use it

 

[MarkW19]

Looks like I'm safe then.

Dang, I worry too much

 

[fishfreek]

I calibrate mine every so often but its not every usage. If I accidently jar the unit I will calibrate it before using it again.

 

[MarkW19]

It has to be recalibrated with RO water I guess?

 

[fishfreek]

Either RO water or DI water. Basicly a water sorce that has as few impurities as possible since various impurities will affect how the light is refracted thru it onto the scale.