Hanna Instruments HI 2221 - Manual (Page 13)

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Notes: • To clear calibration parameters for all uncalibrated buffers
starting with current buffer, press CLR. The calibration
will continue from the current point. If this procedure is
performed while calibrating in the first calibration point,
the instrument returns to measurement mode.
• Press RANGE to toggle between pH
buffer, calibration buffer number and
temperature reading.