Microlife 3BU1-5 Blood Pressure Monitor User Manual

The Microlife 3BU1-5 is an automatic upper arm blood pressure monitor featuring clinically validated accuracy, one-touch operation, irregular heartbeat detection, hypertension indicator, 2-user memory with 99 measurements each, date and time display, adjustable cuff, large LCD screen, and automatic power-off. It is designed for home use to monitor systolic, diastolic pressure, and pulse rate. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Main unit with LCD display, Adjustable arm cuff, Air tube, 4x AA batteries, Storage case, Instruction manual.

Safety Information

Read all instructions before use. For home use only.

1. Do not use on infants, children, or persons unable to express themselves.
2. Consult physician before use if you have arrhythmia, pre-eclampsia, or other circulatory disorders.
3. Do not use during or immediately after physical exercise, bathing, eating, or drinking alcohol/caffeine.
4. Ensure cuff is at heart level during measurement.
5. Do not inflate cuff when not wrapped around arm.

WARNING! Not a medical device for diagnosis. Measurements are for monitoring only. Consult healthcare professional for interpretation.

Package Contents

• Microlife 3BU1-5 Blood Pressure Monitor (main unit)
• Adjustable arm cuff with air tube (pre-connected)
• 4 x AA batteries (1.5V)
• Instruction manual (this document)
• Storage case
• Warranty card

CAUTION! Check all items upon unpacking. Do not use if any component is damaged.

Specifications

• Measurement Method: Oscillometric
• Measurement Range: Pressure: 0-299 mmHg, Pulse: 40-199 beats/min
• Accuracy: Pressure: ±3 mmHg, Pulse: ±5% of reading
• Memory: 2 users x 99 measurements with date/time
• Cuff Size: 22-42 cm (8.7-16.5 inches) circumference
• Power Supply: 4 x AA batteries (1.5V) or optional AC adapter (not included)
• Battery Life: Approximately 500 measurements
• Display: LCD with backlight
• Operating Conditions: 10°C to 40°C (50°F to 104°F), 15-85% humidity
• Storage Conditions: -20°C to 60°C (-4°F to 140°F)
• Dimensions: Main unit: 135 x 105 x 55 mm
• Weight: Approximately 300g (without batteries)

Device Overview

Front Panel: START/STOP button, MEMORY button, USER SELECT button (1/2), LCD display.

Display Symbols: User indicator (1/2), Systolic pressure, Diastolic pressure, Pulse rate, Irregular heartbeat symbol, Hypertension indicator (color bar), Battery indicator, Memory full indicator, Date/Time, Error symbols.

Side/Back: Air tube connector, Battery compartment, AC adapter port (optional).

Cuff: Velcro closure, metal D-ring, artery marker, air tube connection.

Initial Setup

Before first use, install batteries and set date/time.

1. Open battery compartment on back, insert 4 AA batteries observing polarity.
2. Press any button to turn on device.
3. Press and hold MEMORY button for 3 seconds to enter setup mode.
4. Use START/STOP to adjust values, MEMORY to confirm and move to next setting.
5. Set: Year → Month → Day → Hour → Minute → 12/24 hour format.
6. Device automatically exits setup after last setting.

Tip: Replace batteries when low battery symbol appears. Remove batteries if not using for extended period.

Taking a Measurement

For accurate results, rest 5 minutes before measuring.

1. Sit comfortably with back supported, feet flat on floor.
2. Select user (1 or 2) using USER SELECT button.
3. Wrap cuff on bare upper arm 1-2 cm above elbow. Artery marker should align with brachial artery.
4. Cuff should be snug but not tight (allow one finger underneath).
5. Rest arm on table with cuff at heart level. Palm up, relax.
6. Press START/STOP button. Cuff inflates automatically.
7. Remain still and quiet during measurement.
8. Cuff deflates automatically. Results display with systolic, diastolic, pulse.
9. Hypertension indicator shows color: Green (normal), Yellow (mild), Red (high).
10. Irregular heartbeat symbol appears if detected.
11. Device automatically stores reading and powers off after 1 minute.

WARNING! Do not move or talk during measurement. Do not inflate cuff more than 3 times consecutively.

Memory Function

Device stores 99 measurements per user with date/time stamp.

1. To recall memory: Press MEMORY button.
2. Display shows most recent reading with user number.
3. Press MEMORY repeatedly to scroll through stored readings.
4. Average of last 3 readings displays after scrolling through all.
5. To clear memory: While in memory mode, press and hold START/STOP for 3 seconds.
6. Select user to clear (1 or 2) or both.

Note: Memory full symbol appears when 99 readings stored. Oldest reading is overwritten by new one.

Care & Maintenance

Clean only with soft, dry cloth. Do not immerse in water or use chemicals.

1. Remove batteries if not using for more than 3 months.
2. Store in cool, dry place away from direct sunlight.
3. Do not drop or subject to strong shocks.
4. Keep cuff clean; hand wash with mild soap if needed, air dry completely.
5. Do not bend air tube sharply or pull forcefully.
6. Replace cuff if Velcro no longer holds securely.

CAUTION! Do not disassemble device. No user-serviceable parts inside.

Regulatory Information

FDA Cleared: K123456. CE Marked: Medical Device Directive 93/42/EEC. Manufactured under ISO 13485 quality standards. This device complies with Part 15 of FCC Rules. Copyright © Microlife AG. All rights reserved. For support, visit www.microlife.com or contact customer service at 1-800-435-XXXX.

Troubleshooting

Reset: Remove batteries for 1 minute to reset device.

Service: Do not attempt repair. Contact Microlife customer service: 1-800-435-XXXX or www.microlife.com