Omron NT31 Operation Manuals page 172

Memory Initialization
Initialize the alarm history record data by following the menu operation from the
System Menu shown below.
S If "No" is selected, the NT31/NT31C returns to the "MEMORY INIT. MENU"
screen without initializing the alarm history record data.
On completion of alarm history record data initialization, the message "Finished" is
displayed and the NT31/NT31C returns to the "MEMORY INIT. MENU" screen.
Select "Maintenance Mode".
Select "Memory Init.".
Select "Alarm History".
Select "Yes".
The alarm history record data is initialized.
During initialization, the message "Initializing"
is displayed.
Section 6-4
161