zewa UAM-820BT - User Manual

Questions and Answers

C
Cheryl MillerAug 13, 2025
What does error message E 03 mean on zewa UAM-820BT?
- C
  cheryl65Aug 13, 2025
  Error message E 03 on your zewa Blood Pressure Monitor indicates that the measurement process isn't detecting a pulse signal. Try loosening the clothing on your arm and then measure again.
P
Patrick SalazarAug 17, 2025
How to resolve error message E 12 on zewa UAM-820BT Blood Pressure Monitor?
- J
  John SmithAug 17, 2025
  If your zewa Blood Pressure Monitor is showing error message E 12, data communication has failed. Ensure that your phone’s Bluetooth is turned on and is within the appropriate distance range.
C
calhounmelissaAug 20, 2025
How to fix zewa UAM-820BT when it has no power?
- S
  Savannah SmithAug 20, 2025
  If your zewa Blood Pressure Monitor isn't powering on, the batteries may be exhausted, so replace them with new ones. Another possibility is that the batteries are inserted incorrectly; ensure they are correctly placed. Also, check that the AC adapter is tightly inserted.
G
greenbrandonAug 25, 2025
What to do if zewa UAM-820BT Blood Pressure Monitor shows low battery?
- B
  brittanyoliverAug 25, 2025
  If your zewa Blood Pressure Monitor indicates low batteries, the solution is to replace them with new ones.
M
Marcia MaloneAug 27, 2025
What to do if zewa Blood Pressure Monitor shows error message E 02?
- D
  Donna TorresAug 28, 2025
  If your zewa Blood Pressure Monitor displays error message E 02, it means the monitor detected motion, talking, or a poor pulse signal during measurement. Relax for a moment, and then measure again.
F
fsavageAug 31, 2025
Why does my zewa Blood Pressure Monitor show error message E 01?
- J
  Joseph MataSep 1, 2025
  The zewa Blood Pressure Monitor displays error message E 01 when the cuff is either too tight or too loose. Refasten the cuff, ensuring a snug fit, and then measure again.
J
Justin DavisSep 4, 2025
What to do if zewa UAM-820BT Blood Pressure Monitor displays error E 04?
- O
  oscar41Sep 4, 2025
  If your zewa Blood Pressure Monitor shows error message E 04, it means the treatment of the measurement failed. Relax for a moment, and then measure again.
R
Rodney MorrisSep 8, 2025
What does error message EExx mean on my zewa UAM-820BT Blood Pressure Monitor?
- T
  Timothy GraySep 8, 2025
  If your zewa Blood Pressure Monitor displays error message EExx, it indicates a calibration error has occurred. Retake the measurement.

Summary

Introduction

Contraindications

Lists specific conditions or patient groups for whom the device should not be used.

Measurement Principle

Explains the Oscillometric Measuring Method used by the device to determine blood pressure.

Safety Information

Details symbols and cautions related to the safe operation and use of the device.

Before You Start

The Choice of Power Supply

Describes the options for powering the blood pressure monitor, including battery and adapter.

Installing and Replacing the Batteries

Provides step-by-step instructions for inserting and changing the device's batteries.

Systolic and Diastolic Pressure Explained

Specifications

Power Supply

Information on the voltage and current requirements for operating the device.

Measurement Range

Defines the limits for systolic, diastolic, and pulse readings the device can measure.

Accuracy

States the precision and acceptable error margins for pressure and pulse measurements.

Measurement Perimeter of the Upper Arm

Indicates the range of arm circumferences the cuff is designed to fit.

This document describes the ZEWA Blood Pressure Monitor UAM-820BT, an arm-type digital monitor designed for adult indoor use. It measures blood pressure and heartbeat rate, and stores the results.

Function Description

The UAM-820BT utilizes the Oscillometric Measuring Method to detect blood pressure. Before each measurement, the unit establishes a "zero point" equivalent to atmospheric pressure and then inflates the cuff. During inflation, it detects pressure oscillations generated by beat-to-beat pulsatile activity to determine systolic and diastolic pressure, as well as pulse rate. The device is intended for non-invasive measuring and monitoring of arterial blood pressure on the arm. It is not suitable for continuous monitoring during medical emergencies or operations.

Important Technical Specifications

Display: 80x60mm Digital LCD display.
Measurement Method: Oscillographic testing mode.
Cuff Circumference: Ranges from 23 cm to 37 cm.
Rated Cuff Pressure: 0 mmHg to 299 mmHg (0 kPa to 39.9 kPa).
Measurement Pressure:
- SYS (Systolic): 60 mmHg to 230 mmHg (8.0 kPa to 30.7 kPa).
- DIA (Diastolic): 40 mmHg to 130 mmHg (5.3 kPa to 17.3 kPa).
Pulse Value: 40 to 199 beats/minute.
Accuracy:
- Pressure: ±3 mmHg (0.4 kPa) within 5°C to 40°C.
- Pulse Value: ±5%.
Power Supply:
- Battery Powered: 6VDC (4xAA batteries).
- AC Adaptor Powered: 6V 1A (not included, manufacturer-authorized adaptor recommended).
Operating Conditions:
- Temperature: +5°C to +40°C.
- Relative Humidity: 15% to 90% (non-condensing, without water vapor partial pressure greater than 50 hPa).
- Atmospheric Pressure: 700 hPa to 1060 hPa.
Storage & Transportation Conditions:
- Temperature: -20°C to +60°C.
- Relative Humidity: ≤ 93% (non-condensing, at a water vapor pressure up to 50 hPa).
Weight: Approximately 248g (excluding batteries).
External Dimensions: Approximately 102mm x 143mm x 73mm.
Degree of Protection: IP21 (protected against solid foreign objects of 12.5mm and greater, and vertically falling water drops).
Device Classification: Internally Powered ME Equipment (Battery Powered Mode), Class II ME Equipment (AC Adaptor Powered Mode).
Software Version: A01.
Bluetooth Module: LS51802.
- RF Frequency Range: 2402 MHz to 2480 MHz.
- Output Power Range: ≤4dBm.
- Supply Voltage: 2V-3.6V.
- Transmitting Distance: 10 meters.

Usage Features

User Interface: Features an LCD display showing SYS (systolic), DIA (diastolic), Pul (pulse), current time, average value (AVG.3), low battery indicator, irregular heartbeat detection, heartbeat indicator, motion indicator, data pending to transmit, and Bluetooth icon.
Measurement Process:
1. Cuff Placement: Remove jewelry, expose skin, and tie the cuff on the upper arm with the tube off-center toward the inner side of the arm, aligned with the little finger or artery mark. Ensure the cuff is snug but not too tight (one finger should fit).
2. Positioning: Sit comfortably with the tested arm resting on a flat surface, elbow on a table, cuff at heart level, palm upwards. Sit upright and take 5-6 deep breaths.
3. Initiating Measurement: When the monitor is off, press the START/STOP button to turn it on and begin the measurement.
4. Zero Point Adjustment: The monitor adjusts to zero.
5. Inflation and Measurement: The cuff inflates, and the device measures blood pressure and pulse.
6. Result Display: Results are displayed and saved.
Data Management:
- Record Storage: Stores a maximum of 60 records per user.
- Recall Records: When the monitor is off, press and hold the START/STOP button to enter recall mode. Press again to view the average of the latest three records, or individual records sequentially.
- Data Transmission: The Bluetooth symbol blinks during data transmission after measurement. If successful, the Bluetooth symbol lights up, and the transmit icon disappears. If transmission fails, the transmit icon disappears.
- Deleting Records: All results can be deleted via the accompanying app.
Pairing with Device:
1. Turn on Bluetooth and the app on your device.
2. When the monitor is OFF, press and hold the START/STOP button to start pairing. The LCD will show "+" alternatively.
3. Upon successful pairing, the LCD will show "+[]". If pairing fails, it will show "+E12".
4. The monitor turns off after pairing.
Error Messages and Troubleshooting: The manual provides a comprehensive list of error messages (E01, E02, E03, E04, E12, EExx) and warning messages ("out") with corresponding symptoms, checks, and remedies.
Patient Guidance: Includes tips for accurate measurement, such as resting for 5 minutes before measurement, waiting 3 minutes between measurements, measuring in a silent room, relaxing, not moving or talking, maintaining cuff at heart level, sitting comfortably with feet flat, and measuring at the same time on the same arm for consistent comparison.
Irregular Heartbeat Detector: The monitor detects irregular heartbeats by analyzing pulse intervals. If significant variations are detected, an irregular heartbeat symbol appears.

Maintenance Features

Cleaning: Use a soft cloth to clean the unit before and after use. Do not use abrasive or volatile cleaners. Avoid touching water.
Storage: Store in a dry room, protected from extreme moisture, heat, lint, dust, and direct sunlight. Do not place heavy objects on the storage case.
Battery Replacement: Replace batteries when the "Lo" symbol appears, the display dims, or the display does not light up. Do not mix new and used batteries or different types. Remove batteries if the device will not be used for an extended period. Dispose of worn batteries according to local recycling guidelines.
Cuff Care: Avoid washing the cuff.
Environmental Considerations: Avoid intense shaking and collisions, and dusty or unstable temperature environments.
Calibration: The device does not require calibration within two years of reliable service. Performance checks are recommended every 2 years and after maintenance/repair.
Service: Do not open or repair the device yourself. Contact authorized sales/service centers for malfunctions.
EMC Guidance: The device requires special precautions regarding EMC and should be installed and used according to the provided EMC information. Avoid using mobile phones or other devices that emit electromagnetic fields near the unit.