[Cal_stir]

[quote=rayjay;716120]You need to read the article fully so you understand each segment and don't let your opinions reflect in what you are seeing.
First of all, the article isn't mine, it is by a respected chemist in the medical field who just happens to spend a lot of time researching the hobby and helping hobbyists on RC.

I am a huge fan of Randy, but sometimes it's just too much science.

Quote@IMO, it's only boring to those that aren't really interested in the whole facts and while I agree that in the great scheme of things, the .0017 error isn't going to cause your tank to fail, it is there, and it's hypocritical IMO to crucify use of swing arms by someone who ignores the limitations of many refractometers

I check my refractometer regularly, I keep it clean, I always test @ tank temp. and I allow 30 seconds for temp. compensation, purchased calibration fluid only to find out I didn't need to, that's not ignoring its limitations.
I've had 4 swing arms, all off by at least 3 points, 2 were 7 ponts apart, they are all in the garbage because the are not worth their weight in recycled plastic and yes they should be crucified.