Microlife BPHJN3-D Blood Pressure Monitor User Manual

The Microlife BPHJN3-D is an upper arm blood pressure monitor with advanced features for accurate home measurement. It features a large LCD display, one-touch operation, irregular heartbeat detection, hypertension indicator, memory storage for multiple users, date and time display, and automatic power-off. Powered by 4 AA batteries or optional AC adapter. Below are key sections for safety, features, preparation, measurement, memory functions, maintenance, and troubleshooting.

1. Features at a Glance 2. Safety Information 3. Parts Identification 4. Preparation for Measurement 5. Taking a Measurement 6. Understanding Results 7. Memory Function 8. Care & Maintenance 9. Specifications 10. Troubleshooting 11. Warranty Information

Features at a Glance

Key components: Main unit with LCD display, Upper Arm Cuff with D-Ring, AC Adapter (optional), Instruction Manual, Quick Start Guide.

Feature	Description
One-Touch Operation	Automatic inflation and measurement with single button press
Irregular Heartbeat Detection	Detects and displays irregular heartbeat during measurement
Hypertension Indicator	Color-coded display based on WHO classification
Multi-User Memory	Stores up to 99 readings for each of 2 users
Date & Time Stamp	Records measurement date and time for tracking
Large LCD Display	Clear, easy-to-read results with backlight
Automatic Power Off	Conserves battery life when not in use
Average Value	Calculates average of last 3 measurements
WHO Classification	Displays blood pressure category according to WHO standards
Comfort Inflation	Adjusts inflation pressure based on user's blood pressure

Safety Information

Read all instructions before use. Keep for future reference.

Do not use on infants, children, or persons unable to express themselves.
Consult physician before use if you have arrhythmia, blood circulation problems, or other medical conditions.
Do not use during or immediately after physical exercise.
Do not wrap cuff over clothing or apply to injured arm.
Keep device away from children and pets.

WARNING! This device is for home use only, not for professional medical diagnosis. Consult your physician for medical advice.

Parts Identification

Familiarize yourself with device components.

LCD Display: Shows measurement results, memory, date/time, and indicators.
START/STOP Button: Initiates and stops measurement.
MEMORY Button: Accesses stored readings and user selection.
SET Button: Sets date, time, and user information.
Cuff with D-Ring: Wraps around upper arm with Velcro closure.
Air Tube: Connects cuff to main unit.
AC Adapter Jack: For optional power adapter connection.
Battery Compartment: Holds 4 AA batteries.

CAUTION! Do not bend or kink the air tube during use or storage.

Preparation for Measurement

Proper preparation ensures accurate readings.

Rest for 5 minutes before measurement.
Avoid caffeine, smoking, or alcohol 30 minutes before.
Sit comfortably with back supported and feet flat on floor.
Remove tight clothing from upper arm.
Apply cuff to bare upper arm 1-2 cm above elbow.
Position cuff at heart level during measurement.
Remain still and quiet during measurement.

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

Taking a Measurement

Power On: Insert batteries or connect AC adapter.
User Selection: Press MEMORY to select User 1 or User 2.
Cuff Application: Wrap cuff snugly around arm with tube facing downward.
Start Measurement: Press START/STOP button.
During Inflation: Cuff inflates automatically; remain still.
Reading Display: Systolic, diastolic, and pulse rate appear on screen.
Automatic Deflation: Cuff deflates after measurement completes.
Power Off: Device turns off automatically after 1 minute.

Understanding Results

Access OSD via TV MENU or SETUP (DVD). Front Panel: POWER, OPEN/CLOSE, AUTO/DPMS, MUTE.

Display Symbols: - Heart Symbol: Pulse rate display - Irregular Heartbeat Symbol: Detected irregular heartbeat - Memory Symbol: Memory mode active - User Symbol: Current user (1 or 2) - Battery Symbol: Low battery indicator - WHO Classification Bar: Color-coded hypertension indicator

WHO Classification: - Green: Optimal/Normal (Systolic < 130, Diastolic < 85) - Yellow: High Normal/Mild Hypertension (Systolic 130-159, Diastolic 85-99) - Red: Moderate/Severe Hypertension (Systolic ≥ 160, Diastolic ≥ 100)

Memory Function

Stores up to 99 readings per user with date/time stamp.

Press MEMORY button to enter memory mode.
Use arrow buttons to scroll through stored readings.
Press SET to view average of last 3 measurements.
To delete all memory: Hold MEMORY for 5 seconds until "CLR" appears.
Memory is maintained when batteries are replaced.

Tip: Regular memory review helps track blood pressure trends over time.

Care & Maintenance

Supports DVD-Video, audio CDs.

Clean cuff with mild soap and damp cloth; do not immerse in water.
Wipe main unit with dry, soft cloth.
Store in cool, dry place away from direct sunlight.
Remove batteries if not using for extended period.
Replace cuff if Velcro loses adhesion or fabric tears.
Do not use alcohol, benzene, or abrasive cleaners.
Avoid extreme temperatures and humidity.
Do not disassemble or attempt repairs.

WARNING! Do not wash cuff in washing machine or use dryer.

Specifications

Closed Captions: Enable in DVD setup (On/Off). Parental Controls: Block by movie/TV ratings in FEATURES menu (password 9999).

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 (8.7-16.5 inches)
Memory: 99 readings x 2 users
Power Supply: 4 x 1.5V AA batteries or 6V DC adapter
Battery Life: Approximately 300 measurements
Dimensions: 118mm (W) x 105mm (H) x 67mm (D)
Weight: Approximately 300g (without batteries)
Operating Conditions: 10°C to 40°C, 15% to 85% humidity

Troubleshooting

Symptom	Possible Cause	Corrective Action
No display	Dead batteries	Replace all 4 batteries with new ones.
Error E1 displayed	Cuff not properly attached	Check cuff connection; reattach securely.
Error E2 displayed	Measurement error	Remain still; retake measurement.
Error E3 displayed	Irregular heartbeat detected	Result may be inaccurate; consult physician.
Inaccurate reading	Improper cuff position	Ensure cuff at heart level; retake measurement.
Cuff doesn't inflate	Air leak or blockage	Check tube connections; ensure no kinks.
Memory not working	Batteries removed too long	Memory clears if batteries out > 2 minutes.
Display dim	Low battery	Replace batteries immediately.

Reset: Remove batteries for 2 minutes to reset device.

Warranty Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Copyright © 2025 Microlife; trademarks of Microlife Corporation. For support, visit www.microlife.com or contact 1-800-435-XXXX.

Limited Warranty: 5 years on device, 2 years on cuff from date of purchase. Proof of purchase required. Warranty covers defects in materials and workmanship under normal use. Does not cover damage from misuse, accidents, unauthorized repairs, or normal wear and tear.

Service: 1-800-435-XXXX; www.microlife.com/support