Hanna Instruments HI 4421 - Manual (Page 37)

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PRESSURE CALIBRATION PRESSURE CALIBRATION PRESSURE CALIBRATION PRESSURE CALIBRATION PRESSURE CALIBRATION
If Automatic pressure source is chosen from the Pressure Source menu (see DO Setup ), a pressure calibration in one
point can be performed.
To perform pressure calibration:
• Press
to clear the current calibration;
• Use or to modify the pressure value;
• Press to finish the calibration or to exit
calibration.