Ion Calibration; Calibration Preparation - Horiba Scientific LAQUA F-73A-S Instruction Manual

Ph/ion meter
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4.2 ION Calibration

There are two methods to measure ion concentrations using an ion electrode; the
calibration curve method and the standard addition method.
In the calibration curve method, you prepare a calibration curve showing the relation
between mV and concentration using some standard solutions of different concentrations
and use it to measure ion concentration of a sample.
We recommend performing calibration once a day, before measurement.
Refer to the instruction manual of the ion electrode for standard solution preparation.
Perform resolution temperature setting before ION calibration according to the paragraph
of "4.4 ION Measurement Setting" (P.56).
・The calibration calculation of an ION electrode depends on the unit and ion to be
measured. Perform ION measurement setting before starting calibration.
on the ION CAL screen allows you to check the current calibration data.
・Tapping
To clear the calibration data, tap
As an example, the procedures of 2 points calibration using standard solutions are as
follows.

4.2.1 Calibration Preparation

.
1.
Tap the channel setting and the measurement
item in the MEAS screen to set "CH1" and "ION".
2.
Press the CAL key to display the ION CAL
screen.
3.
Wash the ION electrode with pure water (ion
exchange water), and wipe it off by filter paper or
tissue paper.
4.
Open the internal solution filler port of the ION
electrode.
5.
Immerse the ION electrode into a beaker of the
standard solution used for the 1st point
calibration.
53

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