E-21MEASUREMENTTips for a Good Measurement (continued)• Compare blood pressure taken at the same time each day.• This device bases its measurements on the heartbeat. Ifyou have a very weak or irregular heartbeat, the devicemay have difficulty determining your blood pressure.• Should the device detect a condition that is abnormal, it willstop the measurement and display an error symbol. Referto the section “Symbols” for the description of the symbols.• This device is intended for use by adults only. Consult withyour physician before using this device on a child. A childshould not use this device unattended.• Do not cross your legs and keep your feet flat on the floorduring measurement.• The automatic blood pressure monitor’s performance may beaffected by excessive temperature or humidity, or altitude.WHAT IS AN IRREGULAR HEARTBEATWhen an irregular heartbeat is detected, the app showsIHB icon . The Lifesource1200 UltraConnect provides ablood pressure and pulse rate measurement even when anirregular heartbeat occurs. An irregular heartbeat is definedas a heartbeat that varies by 25% from the average of allheartbeats during the blood pressure measurement. It isimportant that you are relaxed, remain still and do not talkduring measurements.Note: We recommend contacting your physician if you see this symbol frequently.