Reading The Set Date; Measurement Procedure; Before Measuring; Common Sources Of Error - Microlife BP 3AA1-2 Manual De Instrucciones

9. Press the User/Time button again. The last two
characters (Minutes) now blink.
10. The minutes can now be entered by pressing
the MEMORY button. (Example: 30 x presses
advances the time from 0 to 30 minutes)

5. MEASUREMENT PROCEDURE

5.1. Before measuring:

• Avoid eating, smoking as well as all forms of exertion directly before the measurement. All these factors
influence the measurement result. Try and find time to relax by sitting in an armchair in a quite atmosphere
for about ten minutes before the measurement.
• Remove any garment that fits closely to your upper arm.
• Always measure on the same arm (normally left).
• Take measurements regularly at the same time of day, since blood pressure changes during the course of
the day.

5.2. Common sources of error:

Note: Comparable blood pressure measurements always require the same conditions!
Conditions should always be quiet.
• All efforts by the user to support the arm can increase blood pressure. Make sure you are in a comfortable,
relaxed position and do not activate any of the muscles in the measurement arm during the measurement.
Use a cushion for support if necessary.
• If the arm artery lies considerably lower or higher than the heart, an erroneously high or low blood pressure
will be measured! Each 15cm (6 inches) difference in height results in a measurement error of 10 mmHg!
• Cuffs that are too narrow or too short result in false measurement values. Selecting the correct cuff is
extremely important. Cuff size is dependent upon the circumference of the arm (measured in the center). The
permissible range is printed on the cuff. If this is not suitable for your use, please contact Microlife USA.
Large cuff sizes are sold separately.
Note: Only use clinically approved Microlife Original Cuffs!
• A loose cuff or a sideways protruding air pocket causes false measurement values.
• With repeated measurements, blood accumulates in the arm, which can lead to false results. Consecutive
blood pressure measurements should be repeated after a 1 minute pause or after your arm has been held up
in order to allow the accumulated blood to flow away.

4.5. Reading the set date

After all settings have been made, click the
User/Time button once. The date is briefly dis-
played and then the time. The input is now con-
firmed and the clock begins to run.
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