- Joined
- May 28, 2017
- Messages
- 986
- Reaction score
- 444
I picked up a Milwaukee MA887 refractometer as I have heard such good things about it. I have had nothing but trouble with the unit. My issue is that I calibrate with fresh 0 tds RODI water and then check with refractometer solution and it is consistently off. (too high) The other issue is that I keep the instrument in the basement at my sump/aquarium work bench. The basement is a cold drafty basement which is 50-65 degrees depending on the season and outside temp. I have noticed that when I try to get a reading from my tank, the instrument shows one number, then I wait 5 minutes and read the same sample and it shows a completely different number. The only variable is the temp change.
Is there a working temperature range for the ATC portion of the instrument?
Is there a reason it does not accurately read natural seawater refractometer calibration solution accurately?
Should I bring the RODI water up to 78 degrees (tank water temp) before using it to calibrate the machine?
Is there a working temperature range for the ATC portion of the instrument?
Is there a reason it does not accurately read natural seawater refractometer calibration solution accurately?
Should I bring the RODI water up to 78 degrees (tank water temp) before using it to calibrate the machine?