Conrad Electronic DV928 Notice D'emploi page 88

 Viewing the air pressure values of the past 24 hours
• Briefly press the button "SET" (7) on the rear until the air pressure at sea level is displayed (the display "SEA LEVEL"
appear in addition to the air pressure value).
• Briefly press the button "HISTORY" (19) repeatedly. The display now shows the average air pressure for each hour
in the past 24 hours (in case of missing values, e.g. because of a battery change or upon commissioning, line
appear ("- - - - . -") instead of a value.
• If you do not press a button for a few seconds, the display returns to the current air pressure value.
 Activating the air pressure alarm
• Press the button "ALARM/CHART" (10). "ON" resp, "OFF" appears in the air pressure display field.
• By pressing the button "ALARM/CHART" (10) once again, the display switches from "ON" to "OFF" and vice-versa.

An acoustic signal is emitted when the alarm is activated (stop this by pressing the button "ALARM/
CHART") if the air pressure drops by more than 6 hPa/mBar within a short time.
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