Hydrometer Error

[pph_2ppr]

thechad, When you say it would not zero were you using calibration fluid or distilled water? Just curious to how a porecelain crab would react to hermits and firefish? Are they easy to keep?

 

[Kurt_Nelson]

However after several months of use I found my refeactometer would not zero, and some how was stuck.

There's nothing to "stick" in a refractometer. It's just light bending through a prism.

Agree with Sadielynn - sounds like it was dropped if you couldn't rezero it with the screw.

{Edit: now that I think about it, I suppose the pivot that the calibration screw adjusts could've been stuck, or not moving when you adjusted the screw. Either way, it sounds like a manufacturing defect that should be covered under a warranty or something.}

 

[lamaseta17]

yeah i have a hydrometer and it read 1.023 then a friend tested it it was 1.035 where can i get a good refractometer for a good price

 

[pph_2ppr]

When calibrating I thought the calibration fluid was supposed to read 0, but the screw wouldn't let it go that low. So I guess it could have "stuck" since the fluid was supposed to be at 35 ppm which took me a few minutes to figure out :S How would dropping the refractometer affect it unless the glass was cracked?

 

[lando]

refracto fluid should have a measurement to it. If you are using plain RO/DI water it should read ZERO. If you are using a solution, it should have a pre-determined salinity to calibrate it against. For instance, I have a solution that shows a SG of 1.014 for calibration purposes. I tend to use both RO/DI water AND the solution to check for accuracy.