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8. Calibration of measuring cell
8.1 Calibration with pure water
(1)
Set STD Calib. Mode at “Off” on Function <Calib.Mode>.
ok
(2)
Press [esc] key 2 times to return to Main screen.
(3)
Sample pure water
Note: Make sure that there is no air bubble in the measuring cell.
(4)
The measuring cell with pure water can be calibrated automatically with the key entry as follows:
Press [cal.] key for more than 2 seconds to show inversed CALIB(Water) on display, showing
calibration with pure water is in progress.
(5)
All calibrations are automatically stability sensed.
(6)
After calibration is over, the deviation from theoretical value will be shown so that you can check if
the calibration has been successfully completed.
If the deviation from theoretical value falls within
±
0.001g/cm3, calibration is in success. Choose
Execute?(Yes) and store the factor value in the unit.
If the deviation is more than
±
0.001g/cm3, select (No) and do not renew factor value. If a wrong
value is stored, correct measurement data cannot be obtained.
When the deviation is more than
±
0.001g/cm3, recalibrate the measuring cell with pure water. If the
deviation still differs significantly from theoretical value, there is a possibility of the measuring cell
contaminated. Clean the cell thoroughly for recalibration with pure water.
If the deviation persists even with repeated rinsing of the cell, select “Execute?” --> ‘Yes’ after
carrying out calibration, followed by checking to see if correct measurement results can be obtained
with a standard liquid.
Note!
Be sure to set the ‘STD Calib. Mode’ to “Off” in the Function menu
(Calib. Mode) before performing calibration with pure water.
