NAVI D-25 Instruction Manual page 54

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While "HOLD" is blinking
To cancel calibration: Clear the hold by pressing the CAL
key, again.
To fix the calibration value: Fix the value using the
ENTER key.
Calibrations using two or three points
To conduct calibration using two or three points, clear
the "HOLD" display using the CAL key, prepare a
standard solution, and repeat steps 3 through 5.
Calibration can be performed using a maximum of three
points.
The number of calibration points is displayed in the lower
left of the display, as shown below.
1.
When all calibration operations have been
completed, press the MEAS key to return to the
ION Measurement screen.
Do not return any used standard solution to the original
container. Discard it.
While calibration is being performed in the calibration
mode, redoing calibration for a standard solution
updates the calibrated values for the standard solution
only.
If calibration is
measurement mode, however, the calibration will be
performed in the initial state of the meter, resulting in the
clearing of all the previous calibration data.
2 Taking Measurements
2.7 Ion measurement (D-53)
redone after returning to the
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