Instruction manual

Chapter 4 ION Measurement
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Calibration of the 1st point
Calibration of the 2nd point
After the 1st point calibration is completed, tap to proceed to the 2nd point
calibration.
1. Tap the ION value at the right of "Set:" to display
the numerical-key screen.
2. Tap ( when the mol/L unit is set)
to select the auxiliary unit of standard solution
used for calibration.
Each tapping switches the unit as g/L --> mg/L --
> µg/L (mol/L --> mmol/L --> µmol/L for the mol/L
unit system).
3. Enter the ION concentration value of the stan-
dard solution to be used for calibration.
4. Tap .
The concentration of standard solution to
calibrate is reflected.
5. Tap to start the calibration of the 1st
point.
When the 1st point calibration is completed, the
HOLD indicator is lit up and the progress bar
shows that the 1st point calibraion is completed.
1. Wash the ION electrode with pure water (ion
exchange water), and wipe it off by filter paper or
tissue paper.
2. Immerse the ION electrode into a beaker of the
standard solution used for the 2nd point
calibration.
The procedures of subsequent calibration is same
as 1st point calibration.
3. Tap to start the calibration of the 2nd
point.
When calibration of the 2nd point is complete,
the calibration result is displayed on the screen.
4. Tap after checking the calibration result
to return to the CAL screen.
5. To start ION measurement, press the MEAS
key.
To perform calibration again, start the above pro-
cedures from the beginning.