Omron HEM-FL31 Manual: A Comprehensive Guide
This guide provides detailed instructions for safe and effective use of your Omron HEM-FL31, covering setup, measurements, troubleshooting, and warranty details.
Welcome to the Omron HEM-FL31 Wide Range Fit Cuff user manual! This device is designed for home blood pressure monitoring, offering convenience and accuracy. The HEM-FL31 utilizes Intelli Wrap Cuff technology, ensuring comfortable and precise readings regardless of cuff positioning. This manual serves as your trusted guide, from initial setup and proper measurement techniques to understanding error messages and maintaining your device.
Carefully read all instructions before use to guarantee safety and optimal performance. The cuff accommodates arm circumferences of 22-42cm, providing a wide fit for diverse users. Omron provides a 5-year warranty, demonstrating commitment to quality and reliability.
What’s Included in the Box
Upon opening your Omron HEM-FL31 package, you should find the following components. Firstly, the HEM-FL31 blood pressure monitor itself, designed for ease of use and accurate readings. Secondly, the Intelli Wrap Cuff, specifically sized for arm circumferences between 22 and 42 cm, ensuring a comfortable and secure fit for a wide range of users.
Additionally, the box contains four AA-size batteries to power the monitor, allowing for immediate use. A convenient carrying case is also included for safe storage and portability. Finally, you’ll receive this comprehensive user manual, providing detailed instructions and guidance for optimal operation and maintenance of your new blood pressure monitoring system.
Intended Use and Contraindications
The Omron HEM-FL31 is intended for non-invasive measurement of blood pressure and pulse rate in adults at home. It’s designed for personal use and is not intended for continuous monitoring in a hospital setting or for diagnosing medical conditions.
However, certain conditions may make its use inadvisable. Individuals with severe arrhythmia, arterial sclerosis, or pre-existing circulatory problems should consult their physician before use. This device is not suitable for use on infants or small children. Always follow the instructions carefully and consult a healthcare professional if you have any concerns regarding your health or the accuracy of the readings.

Setting Up Your Omron HEM-FL31
Proper setup is crucial for accurate readings; this involves installing batteries correctly and ensuring the cuff is securely and appropriately attached to your arm.
Installing Batteries
To begin, locate the battery compartment, typically found on the monitor’s side or back. Open the compartment cover, usually by sliding or lifting a latch. The Omron HEM-FL31 requires four AA-size batteries, which are included with your purchase.
Insert the batteries, carefully observing the polarity markings (+ and -) inside the compartment. Incorrect battery insertion can damage the monitor and void the warranty. Ensure the batteries snap securely into place. Close the battery compartment cover until it clicks shut.
A low battery indicator will appear on the display when replacement is needed. Always replace all batteries at once with new ones of the same type.
Attaching the Cuff Correctly
Proper cuff attachment is crucial for accurate readings. Slide the cuff over your upper arm, positioning the lower edge approximately 1 inch (2-3 cm) above your elbow. Ensure the artery mark on the cuff aligns with your brachial artery – typically on the inner side of your elbow.
The cuff should be snug, but not too tight; you should be able to slip one finger comfortably between the cuff and your arm. Avoid positioning the cuff over clothing, as this can distort measurements.
The Intelli Wrap Cuff design allows for 360-degree protection, simplifying positioning. Secure the cuff with the hook and loop fastener, ensuring it’s firmly attached but not constricting.
Understanding the Cuff Size (22-42cm)
The Omron HEM-FL31 is equipped with a Wide Range Fit cuff, designed to accommodate arm circumferences from 22 to 42 centimeters (approximately 8.7 to 16.5 inches). Using the correct cuff size is paramount for accurate blood pressure measurements.
An incorrectly sized cuff – too small or too large – can lead to falsely elevated or lowered readings. Measure your arm circumference before use to confirm compatibility.
The Intelli Wrap Cuff technology contributes to comfortable and reliable measurements across this range. If your arm circumference falls outside this specified range, consult your healthcare provider for alternative cuff options.
Consistent use of the appropriate cuff size ensures the reliability of your monitoring.

Taking Accurate Blood Pressure Measurements
Achieving precise readings with your Omron HEM-FL31 requires proper body positioning and following the step-by-step measurement procedure carefully for reliable results.
Proper Body Positioning
To ensure accurate blood pressure readings with your Omron HEM-FL31, maintain a relaxed and comfortable posture. Sit upright in a chair with your back supported, and place your feet flat on the floor.
Avoid crossing your legs, as this can elevate blood pressure. Ensure your arm is supported at heart level – use a table or armrest if needed.
Relax your arm and avoid tensing muscles during the measurement. It’s crucial to remain still and quiet throughout the process, avoiding talking or movement.
Allow at least five minutes of rest before taking a measurement to stabilize your blood pressure. Proper positioning minimizes errors and provides more reliable data.
Measurement Procedure – Step-by-Step
First, ensure the cuff is correctly attached, positioned at heart level. Power on the Omron HEM-FL31. Remain still and quiet during inflation.
Press the ‘Start’ button to initiate the measurement. The cuff will automatically inflate and then deflate.
Avoid talking or moving during the process. Once the measurement is complete, the display will show your systolic, diastolic pressure, and pulse rate.
Record your readings for tracking purposes. Repeat the measurement after a few minutes if desired, or as recommended by your healthcare provider. Always follow the device’s instructions for optimal results.

Interpreting Your Readings
Understanding your blood pressure readings is crucial. Systolic pressure (the top number) measures force when your heart beats, while diastolic (bottom number) measures force between beats.
Generally, normal blood pressure is considered below 120/80 mmHg. Elevated readings require attention, and consistently high numbers may indicate hypertension.
Consult your doctor to interpret your results accurately, as individual targets vary.
Record your measurements over time to identify trends. Note any factors influencing readings, like stress or activity. The Omron HEM-FL31 provides data for informed discussions with your healthcare provider.

Features and Technology
Omron’s innovative Intelli Wrap Cuff and Wide Range Fit ensure accurate, comfortable measurements for various arm sizes, enhancing user experience and reliability.
Intelli Wrap Cuff Technology
Omron’s Intelli Wrap Cuff technology represents a significant advancement in blood pressure monitoring. Unlike traditional cuffs, the Intelli Wrap design features a unique, spring-wire framework embedded within the cuff’s inner chamber. This innovative construction ensures even pressure distribution around the entire arm circumference during inflation.
This 360-degree pressure minimizes localized discomfort and reduces the potential for errors caused by incorrect cuff positioning. The Intelli Wrap cuff adapts to your arm’s shape, providing a more consistent and reliable reading, even if the cuff isn’t perfectly aligned. It effectively eliminates excessive pressure during measurements, contributing to a more comfortable and accurate experience for the user.
Wide Range Fit – Benefits
The Omron HEM-FL31 boasts a Wide Range Fit, accommodating arm circumferences from 22 to 42 centimeters. This expanded range significantly increases the usability of the monitor, making it suitable for a broader spectrum of users. A single cuff can now comfortably and accurately fit most adults, eliminating the need for multiple cuff sizes within a household.
This feature is particularly beneficial for families or individuals who may have varying arm sizes. The convenience of a single, versatile cuff simplifies blood pressure monitoring and ensures consistent, reliable results regardless of arm size. It reduces the cost and storage space needed for multiple cuffs, offering a practical and efficient solution for home health management.

Troubleshooting Common Issues
Resolve typical HEM-FL31 problems with our guide to error messages and inconsistent readings, ensuring accurate monitoring and peace of mind.
Error Messages and Their Meanings
Understanding the Omron HEM-FL31’s error messages is crucial for accurate blood pressure monitoring. An “Err” display often indicates a problem with the cuff connection or inflation. Ensure the cuff is securely attached and positioned correctly. If the error persists, check the tubing for any kinks or damage.
Another common error relates to insufficient inflation; this may occur if the cuff is applied too loosely or if the batteries are low. Replace the batteries with fresh ones and re-apply the cuff, ensuring a snug but comfortable fit.
If an “Overflow” message appears, it suggests the cuff is too large for your arm. Consult the cuff size guide to confirm you’re using the appropriate size. Always refer to the full manual for a complete list and detailed explanations of all potential error codes.
What to Do if Readings are Inconsistent
Inconsistent blood pressure readings with your Omron HEM-FL31 can be concerning. First, ensure proper technique: maintain a relaxed posture, avoid caffeine or exercise before measurement, and use the correct cuff size. Take multiple readings, spaced a few minutes apart, and average the results.
If discrepancies persist, re-check the cuff placement, ensuring it’s snug but not too tight, positioned correctly on your upper arm. Low batteries can also cause inaccurate readings, so replace them.
If inconsistencies continue, consult your healthcare provider. They can assess your overall health and determine if further investigation is needed. Do not self-treat based solely on home monitoring results.

Maintenance and Care
Regular cleaning of the cuff and monitor ensures accurate readings and extends the lifespan of your Omron HEM-FL31. Replace batteries as needed.
Cleaning the Cuff and Monitor
To maintain optimal performance and hygiene, regularly clean your Omron HEM-FL31. Gently wipe the monitor with a soft, dry cloth. Avoid using abrasive cleaners or solvents, as these can damage the surface. For the cuff, detach it from the monitor and hand wash it with mild detergent and water.
Do not immerse the monitor in water. Ensure the cuff is thoroughly dried before reattaching it. Avoid direct sunlight and extreme temperatures during cleaning and storage. Proper cleaning extends the device’s lifespan and ensures accurate blood pressure measurements; Inspect the cuff regularly for any signs of damage or wear.
Battery Replacement Guidelines
The Omron HEM-FL31 requires four AA batteries for operation. Replace batteries when the low battery indicator appears on the display. Always use new batteries of the same type and avoid mixing old and new batteries. Ensure correct polarity when inserting batteries (+ and -).
Remove batteries if the device will not be used for an extended period to prevent leakage and corrosion. Dispose of used batteries properly according to local regulations. Battery life varies depending on usage frequency. Consistent, accurate readings depend on sufficient battery power; replace them promptly when indicated.

Warranty Information
Omron provides a 5-year warranty on the HEM-FL31 from the purchase date, covering defects in materials and workmanship, ensuring peace of mind.
Omron’s 5-Year Warranty
Omron confidently backs the HEM-FL31 blood pressure monitor with a comprehensive 5-year warranty, commencing from the original date of purchase. This warranty safeguards against defects in materials and workmanship under normal household use. It doesn’t cover damage resulting from misuse, accidents, or unauthorized modifications.
To claim warranty service, retain your proof of purchase and contact Omron Support. The warranty ensures repair or replacement (at Omron’s discretion) of the defective unit. This warranty provides assurance of product quality and Omron’s commitment to customer satisfaction. Regular maintenance, as outlined in this manual, is recommended to maintain warranty validity.
Contacting Omron Support
For any questions, concerns, or to initiate a warranty claim regarding your Omron HEM-FL31, reaching Omron Support is straightforward. Omron Healthcare provides multiple channels for assistance, ensuring convenient access to expert guidance. You can visit the official Omron Healthcare website for FAQs, troubleshooting tips, and downloadable resources.
Alternatively, you can contact their customer service team directly via phone or email. Detailed contact information, including phone numbers and email addresses specific to your region, are available on the Omron website. Prompt and helpful support is readily available to ensure a positive user experience with your blood pressure monitor.

Technical Specifications

The Omron HEM-FL31 operates on AA batteries, measures blood pressure between 0-299 mmHg, and functions optimally within 10-40°C temperature ranges.
Power Source
The Omron HEM-FL31 blood pressure monitor is designed to operate using readily available AA batteries. Specifically, the device requires four (4) AA alkaline batteries for optimal performance. It’s crucial to use new, high-quality batteries to ensure accurate readings and consistent operation. Avoid mixing old and new batteries, or different types of batteries, as this can damage the monitor or lead to inaccurate results.
Battery life will vary depending on usage frequency and storage conditions. When the low battery indicator appears on the display, it signals the need for immediate battery replacement. Refer to the ‘Battery Replacement Guidelines’ section for detailed instructions on safely and correctly changing the batteries. Using the correct power source is vital for reliable blood pressure monitoring.
Measurement Range
The Omron HEM-FL31 is engineered to accurately measure a wide range of blood pressure and pulse rates, catering to diverse user needs. The systolic blood pressure measurement range extends from 60 to 280 mmHg, while the diastolic pressure range is 40 to 180 mmHg. This broad spectrum ensures reliable readings for individuals with varying blood pressure levels.
Furthermore, the device accurately measures pulse rates between 40 and 180 beats per minute. It’s important to note that accurate measurements depend on proper cuff size and correct usage, as outlined in this manual. Readings outside of these specified ranges may indicate a technical issue or require medical attention.
Operating Conditions
To ensure accurate and reliable blood pressure measurements with your Omron HEM-FL31, adhere to specific operating conditions. The device is designed for use within a temperature range of 10°C to 40°C (50°F to 104°F). Humidity levels should be between 15% and 85% relative humidity, avoiding condensation.
Avoid operating or storing the monitor in environments exposed to direct sunlight, extreme temperatures, or high humidity, as these conditions can compromise its accuracy and lifespan. Atmospheric pressure should be between 70 kPa and 106 kPa. Proper storage and usage within these parameters will maintain optimal performance and prolong the device’s functionality.