Wireless EMG Sensor User Manual

Thank you for purchasing the Wireless EMG sensor. Model: RR-ES-V01. The product's manufacture date can be found on the label, and the shelf life is 3 years. Please carefully read this user manual for proper use before using the Wireless EMG sensor. Keep this user manual properly after reading for future consultation.

Revision date of manual: 2025.06.02, Revision A. Wireless EMG sensor firmware: EMGSENSOR-FIRMWARE-1-V1.

For any questions regarding the product, please contact:

After-sales service unit: Vincent Medical (Dongguan) Technology Co., Ltd.
Address: Rm101 & 201, Block 10, 1 Taoyuan Road, Songshan Lake Zone, Dongguan City, Guangdong Province, P.R.C.
Postal code: 523808
Telephone: 0769-21667506

1. Introduction

The Wireless EMG sensor is a device that controls equipment by detecting muscle electrical signals. Muscle contraction voltage signals are used to control equipment. Through secondary development, EMG signal control can be achieved for applications such as toys and home appliances. A testing app will be provided upon purchase.

Components

2. Bluetooth

The wireless EMG sensor connects to paired devices via low-energy Bluetooth to enable data transmission. The sensor needs to enter pairing mode before connecting to a new device to pair the low-energy Bluetooth. In pairing mode, the sensor's low-energy Bluetooth continuously broadcasts signals, waiting for new paired devices to initiate pairing and subscription. A group of Bluetooth devices only needs to be paired once. The optimal number of device pairings is up to 4, ensuring the most stable signal transmission. More pairings may result in delayed data transmission.

Methods for Pairing and Connecting Bluetooth

? Indicator light is flashing. ? Indicator light stays continuously lit.

3. Installation and Wearing

When using the wireless EMG sensor, the two electrodes need direct contact with the skin surface, secured above the muscle to be tested. Double-sided tape or straps are typically used to attach the sensor to the skin surface or secure it to the user's limb.

Use Scenarios

Use Scenario 1: When the space around the target muscle is limited and direct attachment is not possible, use an electrode extension cable to position the sensor closer. Thinner, smaller electrodes can be used on the palm to minimize impact on hand gripping activities.

Use Scenario 2: Mount the wireless EMG sensor on the dorsum of the shoe and secure it with shoelaces. Use an electrode extension cable to extend the electrode to the skin surface over the tibia in the anterior lower leg for measuring the tibialis anterior muscle activity controlling foot dorsiflexion.

Precautions

When the electrode extension line is connected to the sensor, the electrodes at the bottom of the sensor become inactive. These two types of electrodes cannot be used simultaneously. Only the electrodes on the connected extension line collect surface electromyography signals.

Diagrams

Figure 1: Shows sensor attachment methods: L: Using Double-sided Tape, R: Using Strap to Secure the Sensor.

Figure 2: Illustrates using electrode extension lines to place the sensor on a limb, reducing interference and restriction on movement.

Figure 3: Shows securing the sensor to a shoe using shoelaces and using electrode extension wires to measure muscle electrical activity in other body parts.

Note: The electrode extension wires require two additional disposable electrode pads, which attach to the electrode port using a button form. These pads are consumables and can be purchased separately.

4. Charging

The wireless EMG sensor is equipped with a USB Type-C charging port. Please use a suitable USB Type-C charger and charging cable. The lithium battery specification is 300mAh and 3.7V. The working duration with a new battery under different operating conditions is detailed in Table 8.21a.

Diagram: USB Type-C port and cable.

5. Battery

Indicator Light States

? Indicator light is flashing. ? Indicator light stays continuously lit.

6. Data Collection Mode

After successfully connecting the Bluetooth device, press "Next" to enter the EMG measurement page. The mobile software continuously monitors and displays changes in the target EMG signal in real-time, along with the current root mean square (RMS) value. You can toggle the display of surface electromyography (sEMG) signals (represented by a blue line) and RMS values (represented by a red line). The root mean square (RMS) of surface EMG signals is defined as the average of the squared values of a set of EMG signals, with the square root taken of that average. The RMS results in a smooth linear envelope used to estimate the average amplitude of signals with positive and negative oscillations. The red curve illustrates the variation of the measured sEMG signal's effective value.

The calculation formula for the root mean square (RMS) of electromyography signals is:

RMS = 1/N * Σ(xi^2) from i=1 to N

Diagram

Figure 4: Data display page showing EMG (blue line) and RMS (red line) signals over time, with device identifiers and values.

7. Data Description

The following are data contents and applicable settings collected by the wireless EMG sensor:

* Based on the IMU, the three-dimensional rotation vector can be calculated.

8. Specification

9. Other Function/Setting

The following list provides all functions users can operate. Some functions can be operated using the device's buttons, while others require Bluetooth command sets in conjunction with third-party applications and compatible devices. For a detailed Bluetooth instruction set, developers should request the software development manual from the vendor.

Fault Analysis and Troubleshooting

10. Maintenance

Clean: If the surface of the product is dirty, it can be wiped with 75% alcohol.

System maintenance: If there is any abnormal data in the product, please contact Vincent Medical (Dongguan) Technology Co., Ltd. for after-sales service. Please do not disassemble it without authorization.

11. Operational Environment

Environmental conditions for use

General environment: Equipment used in ventilated indoor environments.

Operating environment: 5°C ~ 40°C, humidity ≤80%.

Precaution: Allow for general vibrations and impacts during use to facilitate the movement of the device.

12. Transportation and Storage

Transport: Handle with care, Keep dry, Not cool.

Storage: Stored in -20°C ~ 55°C temperature and humidity ≤80%, Indoor environment with no corrosive gases and good ventilation.

13. Unpacking and Checking

Unpacking: Please check if the accessories are complete. If you encounter packaging damage or water immersion marks, please contact the supplier.

Packing list

Warning and precautions: Do not disassemble, impact or squeeze, do not put into fire or water, and do not place in high temperature environments.

14. Symbol Definition

Wireless EMG Sensor Function Flow Chart

The flow chart illustrates the sensor's operational states and transitions:

• Power on: Press and hold the button for 3 seconds, release on vibration.
• Pairing mode: From power off, press and hold button for 7 seconds, release on second vibration. Indicator lights flash alternately.
• Standby mode: After powering on, if no Bluetooth connection, blue light flashes every 3 seconds. Auto-shuts down after 2 minutes of inactivity.
• Streaming mode: Connects to Bluetooth, vibrates for 1 second. Blue indicator light flashes every 1 second.
• Power off: Press and hold button for 3 seconds, vibrates, then powers off (indicated by 3 flashes).
• Battery level:
• Battery low: Orange light flashes every 1 second.
• During charging: Orange light stays continuously lit.
• Charging complete: Purple light stays continuously lit.

? Indicator light flashing. ? Indicator light stays continuously lit.

FCC Compliance

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

FCC Radiation Exposure statement: The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction.