Hanna Instruments HI 98188 - Manual (Page 29)

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• Press CFM to confirm calibration.
• The calibrated value and the fourth expected standard value will be displayed.
• After the third calibration point is confirmed, immerse the EC electrode into
the fourth 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 value.
• 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 standard, the CFM
functional key is displayed.
• Press CFM to confirm calibration.
• The calibrated value and the fourth expected standard will be displayed.