Hanna Instruments HI 98186 - Manual (Page 31)

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The “Calibration cleared” message will be displayed for a few seconds
and the meter will return to the main screen. If the manual pressure
feature is enabled, the Clear
Clear Clear Clear Clear key will be active only for 5 seconds after
accessing the DO calibration screen, and afterwards it will be replaced by
the Pressure/Standard functional key.
• If the DO value measured by the instrument is not close to the selected
standard, the “Wrong standard” error message will be shown on the
display and the calibration can’t be confirmed.
• While in manual calibration mode it is possible to return to the automatic
calibration mode by pressing the AUTO functional key. The meter will
select the standard that is closest to the current DO reading.