Sper Scientific 800047 Oxygen Pen - Manual (Page 10)

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MEASUREMENT PROCEDURES
3. Press REC again. “REC MIN” and
the minimum value will appear on
the LCD.
Note…
To delete the minimum value, press
HOLD
. The display will show “REC” on-
ly and the meter will resume exe-
cuting the memory function.
4. To exit the data record function,
press REC for at least 2 seconds.
The display will return to the current
reading.
Note…
The maximum and minimum values will
NOT be saved when you exit the
memory function or when the meter is
turned off.