SEFRAM MW 3360 Notice D'utilisation page 24

 MAX : Meter is saving the maximum
and minimum value. Maximum value is
displayed.
 MIN : Meter is saving the maximum and
minimum value. Minimum value is
displayed.
 MAX MIN (flashing) : Meter is saving
the maximum and minimum values.
Present value is displayed.
 Normal : Press and hold MIN MAX to
return to normal operation.
Battery Replacement
Replace battery : "<" is displayed or
displays "<" a flash when press button.
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