Hanna Instruments HI 3512 - Manual (Page 34)

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• Press CAL from EC range to enter calibration mode.
• Leave the probe in the air and press EC. The instrument will display
the measured EC on the LCD, first expected standard and the
temperature reading.
• If necessary, press the ARROW keys to select a different standard
value.
• The “ ” tag will blink on the LCD until the reading is stable.
• When the reading is stable and close to the selected buffer, Confirm
functional key is displayed.
• Press Confirm to confirm first point.
• The calibrated value and the second expected standard value is then
displayed on the LCD.
• After the first calibration point is confirmed, immerse the EC electrode
into the second standard solution and stir gently. Tap the probe
repeatedly to remove any air bubbles that may be trapped inside
the sleeve. The instrument will automatically detect the standard
after few seconds the reading is stable.
• If necessary, press the ARROW keys to select a different standard
value.
• The “ ” tag will blink on the LCD until the reading is stable.