Hey all, recently noticed when testing salinity on my RODI (BRS 4 stage, 8 months old), I'm getting less than 0 readings with a freshly calibrated Vee Gee Scientific refractrometer, where I used to get exactly 0 on my RO. Calibrated 3x now, same deal. All fluids at room temp ~68 F, refractrometer cleaned with RODI after each test..
EDIT: Tank temperature during reading is 78 F, RODI and 35ppt are room temp 68 F.
Calibration using 33ppt fluid right around 1.0264:
Tank level, ~1.025 as intended:
RODI made within a few days ago:
What gives?!
EDIT: Tank temperature during reading is 78 F, RODI and 35ppt are room temp 68 F.
Calibration using 33ppt fluid right around 1.0264:
Tank level, ~1.025 as intended:
RODI made within a few days ago:
What gives?!