1. Introduction
This manual provides essential instructions for the safe and effective use of your BIOS Diagnostics W100 Wrist Blood Pressure Monitor. This device is designed for measuring systolic and diastolic blood pressure, as well as pulse rate, in adults. Its compact design makes it suitable for both home and travel use. For individuals with very large upper arms or those who experience discomfort with upper arm cuffs, a validated wrist model like the W100 can be a suitable alternative.
The BIOS Diagnostics W100 is recommended by Hypertension Canada, indicating its adherence to recognized standards for accuracy and reliability.

Image 1: BIOS Medical is recognized as a leading Canadian Blood Pressure Manufacturer, with products recommended by Hypertension Canada and clinically validated.
2. Product Overview and Components
The BIOS Diagnostics W100 Wrist Blood Pressure Monitor is a portable device featuring a clear LCD display and user-friendly controls.
Included Components:
- BIOS Diagnostics W100 Wrist Blood Pressure Monitor
- 2 x AAA Batteries
- Storage Case
- Instruction Manual

Image 2: The package includes the wrist blood pressure monitor, two AAA batteries, a storage case, and this instruction manual.
Monitor Parts and Display Indicators:

Image 3: Key components and display indicators of the wrist blood pressure monitor.
- Time Button: Used for setting time and date.
- Memory Button (M): Accesses stored measurement data.
- ON/OFF Button: Powers the device on and off, and initiates measurements.
- Display: Shows time, date, systolic pressure (SYS), diastolic pressure (DIA), pulse rate, irregular heartbeat indicator, alarm icon, and battery level.
3. Setup
3.1 Battery Installation
- Open the battery compartment cover on the back of the monitor.
- Insert the two AAA batteries, ensuring correct polarity (+ and -).
- Close the battery compartment cover securely.
3.2 Setting Date and Time
Accurate date and time settings are crucial for tracking your measurements over time.
- With the unit off, press and hold the Time button until the year starts flashing.
- Use the Memory button to adjust the year, then press the Time button to confirm and move to the next setting (month, day, hour, minute).
- Repeat the adjustment and confirmation process for each setting.
- Once all settings are confirmed, the monitor will exit setup mode.
4. Operating Instructions
4.1 Taking a Measurement
Proper positioning is essential for accurate readings. Follow these steps:
- Sit comfortably with your back supported by a chair.
- Rest and remain seated for at least 5 minutes before measuring.
- Place the cuff on your non-dominant arm, or the arm used by your healthcare professional, directly against bare skin.
- Ensure the cuff is positioned approximately one finger-width from your wrist joint.
- Support your arm on a table or other hard surface.
- Position the cuff level with your heart.
- Keep your legs uncrossed and feet flat on the floor.
- Do not move or speak during the measurement.
- Press the ON/OFF button to start the measurement. The cuff will inflate, then slowly deflate while taking the reading.
- Your systolic pressure, diastolic pressure, and pulse rate will be displayed.

Image 4: Correct posture and cuff placement for accurate blood pressure measurement.
4.2 Memory Function
The monitor stores up to 200 measurements, allowing you to track your blood pressure trends over time.
- To view stored measurements, press the Memory (M) button when the unit is off.
- Each press of the Memory button will cycle through previous readings, displaying the most recent first.
4.3 Irregular Heartbeat Detection
The monitor is equipped with an Irregular Heartbeat Detection feature. If an irregular heartbeat is detected during a measurement, a specific icon will appear on the display. If this icon appears frequently, consult your doctor.
4.4 Medication Alarms
The device includes two programmable medication alarms to help you remember to take your medication. Refer to the detailed instructions in the manual for setting these alarms.

Image 5: Overview of the monitor's key features.
5. Important Considerations for Accurate Measurement
- Always measure at the same time of day, preferably in the morning.
- Avoid caffeine, alcohol, and smoking for at least 30 minutes before measuring.
- Empty your bladder before taking a measurement.
- Ensure the wrist cuff fits correctly. The recommended wrist circumference for this device is 13.5 to 21.5 cm (5.25 to 8.5 inches).
- If you obtain consistent readings with diastolic pressure above 85 mmHg or systolic readings over 135 mmHg, consult your doctor.
- If you obtain consistent readings with systolic values under 105 mmHg or diastolic values under 60 mmHg, consult your doctor.
6. Maintenance and Care
- Clean the monitor and cuff with a soft, dry cloth. Do not use abrasive cleaners or immerse the unit in water.
- Store the monitor in its provided storage case when not in use to protect it from dust and damage.
- Remove batteries if the unit will not be used for an extended period to prevent leakage.
- Avoid dropping the monitor or subjecting it to strong impacts.
7. Troubleshooting
Common Issues and Solutions:
- No display: Check battery polarity or replace batteries.
- Inaccurate readings: Ensure correct cuff placement, proper body posture, and that you remained still and silent during measurement. Verify the cuff size is appropriate for your wrist circumference.
- Error message on display: Refer to the full instruction manual for specific error codes and their meanings. Often, this indicates incorrect cuff placement or movement during measurement.
If problems persist, contact customer support.
8. Specifications
- Model Number: W100
- Product Dimensions: 8.5 x 15.5 x 7.5 cm; 270 g
- Power Source: 2 x AAA batteries (included)
- Display Type: LCD
- Wrist Circumference: 13.5 to 21.5 cm (5.25 to 8.5 inches)
- Memory: 200 measurements
- UPC: 057475031008
- Manufacturer: Thermor Ltd.
- Country of Origin: China
9. Warranty and Support Information
Warranty:
The BIOS Diagnostics W100 Wrist Blood Pressure Monitor comes with a 10-Year Limited Warranty. Please refer to the warranty card included with your product for full terms and conditions.
Customer Support:
For assistance, technical support, or warranty inquiries, please contact Thermor Ltd. (BIOS Medical) customer service:
- Email: support@biosmedical.com
- Phone: 1-866-517-2970





