[. . . ] That is why readings can fluctuate when taken at different times of the day. Blood pressure readings from a healthy 31 year old male, measured at 5 minute intervals Blood pressure measured in a doctor's office provides only a momentary value. Repeated measurements at home may be useful when monitoring one's actual blood pressure values. Many people may have a different blood pressure reading when they measure at home, because they tend to be more relaxed than when in the doctor`s office. [. . . ] Both indicate that you have reached the appropriate measuring position. If you have not assumed the appropriate measuring position right away, the monitor will guide you via an arrow on the display. Move your forearm up or down (see illustration) in the direction of the arrow, until a signal sounds and the heart symbol appears. When the measurement is complete, an acoustic signal will sound again, and the reading will be displayed. Upper (systolic) value Lower (diastolic) value Pulse Important 15 seconds after switching on the device the measuring process will begin automatically, even if the appropriate measuring position has not been reached. If at any time you want to discontinue the measurement, press the I/0 button. Depending on your memory setting, your blood pressure monitor can store readings separately for up to two users («a» or «b»). After you have turned on the monitor, the display shows in the lower right corner memory for user «a», memory for user «b» or measuring without saving to memory «­». Press the memory button (B), until the display shows the memory setting you want («a», «b« or «­»). If you have chosen memory «a» or «b», readings will be saved automatically after each measurement. Each memory «a» or «b» can hold up to 30 readings. recalling stored readings To recall stored readings , press the memory button. Repeatedly pressing the memory button will call up one by one all stored readings (including time and date). The number in the upper left corner of the display gives the memory position (01 being the oldest, 30 the most recent) and user «a» or «b». Holding down the memory button for more than a second will take you from memory «a» to «b» or back. Therefore the necessary select button (D) is placed underneath the battery compartment cover. the display shows an image of all modes: time/date , position sensor , statistics mode (see below). If you have made changes and wish to save them, press the memory button. If you want the presettings to remain unchanged, keep pressing the select button until the display goes out, or simply wait 2 minutes. Setting the time Repeatedly press the select button briefly until the hour in the time/date line is flashing. Briefly pressing the select button takes you to minute, day or month, which you can each change with the I/0 button. Activating/de-activating the active positioning system Repeatedly press the select button briefly until the «OK» next to symbol of the position sensor « » is flashing. [. . . ] Error message with a number equal to or higher than 64 If an error message with a number lower than 64 appears, or if any other errors persist, or if you have further questions, call the Braun Infoline on 1-888-848-2572. 5 to 20 cm Type BF equipment Blood pressure measurements determined with this device are equivalent to those obtained by a trained observer using cuff/stethoscope auscultation method, within the limits prescribed by the American National Standard, Electronic or automated sphygmomanometers. Braun warrants this product against any defects that are due to faulty material or workmanships for a time of two years from the original date of consumer purchase. This warranty applies when used for normal household use in accordance with the use instructions and excludes the battery and damage to the product resulting from accident or misuse. [. . . ]