Microlife B3 Basic Blood Pressure Monitor User Manual

The Microlife B3 Basic is a clinically validated, automatic upper arm blood pressure monitor designed for easy home use. It features one-touch operation, a large LCD display with backlight, irregular heartbeat detection, 30 memory slots, WHO blood pressure classification indicator, and a wide-range cuff (22-42 cm). Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Safety Information 3. Package Contents 4. Specifications 5. Device Overview 6. Initial Setup 7. Taking a Measurement 8. Understanding Results 9. Memory Function 10. Care & Maintenance 11. Troubleshooting

Features at a Glance

Key components: Main unit with LCD display, Wide-range upper arm cuff, AC adapter, Storage case, Instruction manual.

Feature	Description
One-Touch Operation	Fully automatic inflation and deflation
WHO Classification Indicator	Color-coded display shows blood pressure category
Irregular Heartbeat Detection	Detects pulse irregularities during measurement
30 Memory Slots	Stores readings with date and time
Large LCD with Backlight	Easy-to-read display in all lighting conditions
Wide-Range Cuff (22-42 cm)	Fits most adult arms
Automatic Power Off	Conserves battery life
Date & Time Stamp	Records when measurements were taken
Average Value Calculation	Calculates average of last 3 readings
Clinically Validated	Meets international accuracy standards

Safety Information

Read all instructions before use. Keep for future reference.

Do not use on infants, small children, or persons unable to express themselves.
Consult your physician before use if you have arrhythmia, pre-eclampsia, or other circulatory disorders.
Do not use during physical activity or immediately after exercise.
Do not wrap cuff over clothing or apply too tightly.
Keep device away from children and pets.

WARNING! This device is for home use only, not for professional medical diagnosis. Consult your doctor for medical interpretation of readings.

Package Contents

Unpack and verify all components are present.

Microlife B3 Basic Monitor (1 unit)
Wide-Range Upper Arm Cuff (22-42 cm)
AC Adapter (for mains power)
Storage Case
Instruction Manual
Quick Start Guide
Warranty Card

CAUTION! Do not use if any components are damaged. Contact customer service for replacement.

Specifications

Measurement Method: Oscillometric
Measurement Range: Pressure: 0-299 mmHg, Pulse: 40-199 beats/min
Accuracy: Pressure: ±3 mmHg, Pulse: ±5% of reading
Cuff Size: 22-42 cm circumference
Memory: 30 measurements with date/time
Power Supply: 4 x AA batteries or AC adapter (6V DC)
Battery Life: Approx. 300 measurements (alkaline batteries)
Display: LCD with backlight
Operating Conditions: 10°C to 40°C, 15% to 90% humidity
Storage Conditions: -20°C to 60°C, ≤93% humidity

Device Overview

Main Unit Front: LCD display, START/STOP button. Top: Cuff connector. Rear: Battery compartment, AC adapter jack.

Display Symbols: Systolic pressure, Diastolic pressure, Pulse rate, WHO indicator, Memory icon, Irregular heartbeat symbol, Battery indicator, Date/Time, Average value icon.

Cuff: Velcro closure, air tube, artery marker (align with brachial artery).

Initial Setup

Before first use: Install batteries or connect AC adapter, set date/time.

Insert batteries: Open battery compartment, install 4 AA batteries observing polarity.
Set date/time: Press and hold START/STOP for 3 seconds, use buttons to adjust.
Connect cuff: Plug air tube into monitor connector until it clicks.
Test device: Apply cuff correctly and take a practice measurement.

Tip: For most accurate readings, use AC adapter or fresh alkaline batteries.

Taking a Measurement

For accurate results: Rest 5 minutes before measuring, avoid caffeine, smoking, and exercise 30 minutes prior.

Sit comfortably: Back supported, feet flat, arm resting at heart level.
Apply cuff: Bare upper arm, artery marker over brachial artery, 2-3 cm above elbow.
Secure cuff: Snug but not tight (one finger should fit under cuff).
Start measurement: Press START/STOP, remain still and quiet.
Read results: Display shows systolic/diastolic pressure and pulse rate.
Automatic deflation: Cuff deflates completely after measurement.
Power off: Device turns off automatically after 1 minute.

WARNING! Do not move or talk during measurement. Ensure cuff is at heart level.

Understanding Results

WHO Classification Indicator colors:

Color	Category	Systolic/Diastolic
Green	Optimal	<120 / <80 mmHg
Yellow	Normal	120-129 / 80-84 mmHg
Orange	High Normal	130-139 / 85-89 mmHg
Red	Hypertension	≥140 / ≥90 mmHg

Irregular Heartbeat Symbol: Appears if irregular pulse detected during measurement. If symbol appears frequently, consult your physician.

Error Codes: E1 (cuff not properly applied), E2 (measurement error), E3 (pulse rate out of range), E4 (excessive movement).

Memory Function

Device stores last 30 readings with date and time.

View memory: Press and release START/STOP quickly when device is off.
Scroll through readings: Press START/STOP to advance through memory.
Average value: After displaying all readings, device shows average of last 3 measurements.
Clear memory: Remove batteries for >30 seconds to clear all memory.

Note: Memory is maintained for approximately 72 hours when batteries are removed.

Care & Maintenance

Unplug AC adapter/remove batteries before cleaning.

Clean monitor: Damp cloth only, no solvents or abrasives.
Clean cuff: Mild soap solution, air dry completely.
Storage: Keep in case provided, avoid extreme temperatures/humidity.
Batteries: Replace when low battery symbol appears. Remove if not used for extended period.
Cuff inspection: Check for leaks, cracks, or Velcro wear periodically.

CAUTION! Do not immerse in water. Do not autoclave. Do not use near flammable gases.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No display	Dead batteries	Replace all 4 batteries or use AC adapter.
Error E1 appears	Cuff not connected properly	Reconnect cuff securely; ensure no kinks in tube.
Inconsistent readings	Movement during measurement	Remain still and quiet; retake measurement.
Cuff doesn't inflate	Air leak	Check cuff/tube connections; replace cuff if damaged.
Memory not working	Batteries removed too long	Memory clears after >72 hours without power.
Display dim	Low battery	Replace batteries or use AC adapter.

Reset: Remove batteries for 30 seconds, then reinstall.

Service: Do not attempt to repair. Contact Microlife customer service or authorized service center.

Support: Microlife AG, Espenstrasse 139, CH-9443 Widnau, Switzerland. Website: www.microlife.com. US Support: 1-800-566-0456.