Sper Scientific LUTU-2016 Turbidity Meter - Manual (Page 14)

Press " Hold Button " ( 3-4, Fig. 1 ) once the display
will show :
100
CAL ntu
Press " Hold Button " ( 3-4, Fig. 1 ) once again
the display will show :
CLr
Now the meter is ready for
CAL ntu
the " Calibration clear "
Press " CAL Button " ( 3-5, Fig. 1 ) once, the
Display will show following text with flashing ( approx.
10 seconds ).
flashing
CAL
CLr
Then the LCD display will return to normal
measurement screen, now the meter is finished the
calibration clear procedures and clear all the existing
calibration data.
12