Measurement of Turbidity
Plug the sensor into the slot #5 (by default) and press keypad "D1" to measure.

Hints on calibration of the turbidity sensor:
Need to calibrate the turbidity sensor to get accurate reading. First half immerse the sensor into a beaker of clean or distill water and select Calibrate from the lower left menu with an input value of 1 (NTU). Then, half immerse it into a standard solution and select Calibrate again with an input value of 100 (NTU or other known value).