Hanna Instruments HI6221 - Direct; Autohold Readings

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mEASurEmENT
• Place the electrode tip and the temperature probe approximately 4 cm (1.5”) into the sample to be
measured. Allow time for the electrode to stabilize.
• Unstable status indicator on the screen until measurement is stabilized.
• The measured pH value is displayed on the LCD, together with GLP information and display preferences.
12.3. DIRECT / AUTOHOLD READINGS
From Measurement screen, tap the Measurement Menu icon ( ) on display. Next,
• Tap to select from supported parameters.
• Tap Direct/Autohold to select direct/autohold Reading Mode.
• Place the electrode tip and the temperature probe approximately 4 cm (1.5”) into the sample to
be tested.
• The measured parameter value will be displayed on the LCD.
The Autohold indicator is displayed blinking until the stability criteria is reached.
The measured value is held on the LCD and Autohold indicator stops blinking.
• To return to direct Reading Mode, tap pH icon on display (
pH
).