SEFRAM 7220 Manuel D'utilisation page 37

MIN/MAX
Press Button > 2 sec
to exit the MIXMAX mode
The MAX/MIN mode records the min and max input values.
When the input goes below the recorded min value or above the
recorded max value, the meter records the new value. Press
Hold button to pause the recording.
Smart Hold
The meter will beep continuously and the display will flash if the
measured signal is larger than the display reading by 50 counts.
(However, it can not detect across the AC and DC Voltage /
Current).
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