To set a different display color for every kind of alarms and display an alarm icon with a display color corresponding to the latest alarm information and data of a channel of measurement data with a background color equal to the display color of the icon.

In this recorder, alarm information is inputted in an alarm setting screen 31 for every selected group, and a display color for an alarm icon for reporting an alarm generation is set to each alarm. When an alarm is generated, data of the channel of measurement data in which the alarm is generated are displayed with a background color equal to the display color of the alarm icon.