Can I use a Cal-Cube for calibrating my Accu4 or Steady Stream 4 turbidimeter?
Accu4 and Steady Stream 4 Calibration
If your turbidity measurements are reported to the USEPA, use a primary turbidity standard such as formazin or StablCal for calibration only. A Cal-Cube is a secondary standard designed for verifying that the calibration of a turbidimeter is correct. It can be used for calibration only if the turbidity values are not being reported to the USEPA.