Microlife BP 3SK1-3B Blood Pressure Monitor User Manual

The Microlife BP 3SK1-3B is an automatic upper arm blood pressure monitor with clinically validated accuracy, one-touch operation, irregular heartbeat detection, 2-user memory with 99 measurements each, WHO blood pressure classification indicator, large LCD display with backlight, adjustable cuff (22-42 cm), and automatic power-off. Below are key sections for safety, features, setup, measurement, memory, and troubleshooting.

1. Features at a Glance 2. Safety Precautions 3. Package Contents 4. Device Overview 5. Initial Setup 6. Taking a Measurement 7. Memory Function 8. WHO Indicator 9. Care & Maintenance 10. Error Messages 11. Troubleshooting

Features at a Glance

Key components: Main unit with LCD display, Adjustable arm cuff, AC adapter port, Battery compartment, START/STOP button, MEMORY button.

Feature	Description
One-Touch Operation	Automatic inflation and measurement with single button press
Irregular Heartbeat Detection	Detects and displays irregular heartbeats during measurement
2-User Memory	Stores 99 measurements for each of two users
WHO Classification Indicator	Shows color-coded blood pressure classification
Large LCD Display	Easy-to-read results with backlight for low light
Adjustable Cuff	Fits arm circumferences 22-42 cm (8.7-16.5 inches)
Automatic Power Off	Conserves battery life by turning off after 1 minute
Date & Time Stamp	Records measurement date and time in memory
Average Value	Calculates average of last 3 measurements per user
Battery/AC Operation	4xAA batteries or optional AC adapter

Safety Precautions

Read all instructions before use. For accurate measurements and safety:

Do not use on infants, young children, or persons unable to express themselves.
Consult physician before use if you have arrhythmia, blood circulation problems, or other conditions.
Do not use during or immediately after physical exercise or bathing.
Do not inflate cuff when not wrapped around arm.
Keep device away from children and pets.

WARNING! This device is for home use only, not for professional medical diagnosis. Always follow your doctor's instructions regarding blood pressure measurement.

Package Contents

Main Unit: Blood pressure monitor with display
Arm Cuff: Adjustable cuff with Velcro closure
AC Adapter: Optional power supply (model specific)
User Manual: This instruction booklet
Storage Case: For device and cuff protection
Quick Start Guide: Basic operation instructions
Warranty Card: Manufacturer's warranty information

Note: Batteries may not be included. Requires 4xAA alkaline batteries.

Device Overview

Front Panel: LCD display, START/STOP button, MEMORY button, USER 1/2 selector.

Display Symbols: Systolic pressure, Diastolic pressure, Pulse rate, Irregular heartbeat indicator, WHO classification bar, User indicator, Memory full, Battery low, Date/Time.

Side/Back: Cuff connector port, AC adapter port, Battery compartment.

Cuff: Marked with artery index line, Velcro closure, metal D-ring, air tube connector.

Initial Setup

Before first use:

Insert batteries: Open battery compartment, insert 4xAA batteries observing polarity.
Set date and time: Press and hold MEMORY button for 3 seconds, use START/STOP to adjust.
Connect cuff: Plug cuff tube into device port until it clicks.
Select user: Press USER button to choose User 1 or User 2.

CAUTION! Use only recommended batteries. Do not mix old and new batteries.

Taking a Measurement

For accurate results:

Rest for 5 minutes before measuring. Sit comfortably with back supported.
Wrap cuff on bare upper arm 1-2 cm above elbow. Artery line should align with brachial artery.
Keep cuff at heart level. Rest arm on table with palm up.
Press START/STOP button. Cuff inflates automatically.
Remain still and quiet during measurement. Do not move arm or talk.
Results display: Systolic, diastolic, pulse rate. WHO indicator shows classification.
Device automatically deflates and stores reading if memory is on.

Tip: Take measurements at same time each day for consistent tracking.

Memory Function

2-user memory with 99 measurements each:

Select user: Press USER button to choose User 1 or User 2 icon.
Memory recall: Press MEMORY button to scroll through stored readings.
Average calculation: Displays average of last 3 measurements for selected user.
Clear memory: Press and hold USER and MEMORY simultaneously for 3 seconds.
Date/Time stamp: Each reading includes date and time of measurement.

Note: When memory is full, oldest reading is automatically deleted for new one.

WHO Indicator

Color-coded blood pressure classification based on WHO guidelines:

Color Zone	Blood Pressure 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

The indicator bar lights up to show which category your reading falls into.

Care & Maintenance

Unplug/battery removal before cleaning. Use slightly damp cloth; do not immerse in water.

Clean cuff with mild soap and damp cloth. Do not machine wash.
Clean device with dry or slightly damp cloth. No solvents or abrasives.
Store in case provided. Keep in cool, dry place away from direct sunlight.
Remove batteries if not using for extended period (more than 3 months).

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

Error Messages

Display Symbol	Meaning	Action
E1	Cuff not properly attached or leaking	Check cuff connection; ensure proper wrapping
E2	Measurement error	Remain still; retake measurement
E3	Pulse rate outside range (40-200 bpm)	Rest and measure again
E4	Excessive movement during measurement	Keep arm still; retake
E5	Pressure exceeds 300 mmHg	Consult physician
Battery Icon	Low battery	Replace all 4 batteries

Troubleshooting

Symptom	Possible Cause	Corrective Action
No display	Dead batteries	Replace all 4 batteries with new alkaline batteries
Inaccurate reading	Wrong cuff position	Ensure cuff at heart level; artery line aligned
Cuff doesn't inflate	Tube not connected	Check cuff connection to device
Error messages	Movement or irregular heartbeat	Keep still; if persistent, consult physician
Memory not storing	Memory full or user not selected	Clear memory or select user before measuring

Reset: Remove batteries for 1 minute to reset device.

Service: For technical support, contact Microlife customer service or visit www.microlife.com