Vernier Software and Technology
Vernier Software & Technology

Go Direct® Respiration Belt User Manual

Go Direct® Respiration Belt

Go Direct Respiration Belt uses a force sensor and an adjustable nylon strap to measure respiration effort and rate. An LED indicator provides feedback so belt tension can be optimized for best results. Respiration rate is reported within the software, which makes comparison studies betweens subjects or experiments easy to do. The sensor can also be used measure steps and step rate. The following are some activities and experiments that can be performed using the Go Direct Respiration Belt:

  • Study how respiration rate changes after exercise or holding of breath.
  • Study how respiration effort changes after exercise or holding of breath.
  • Compare resting respiration parameters of athletes and non-athletes.
  • Use the built-in pedometer to compare step rate while walking and running.

Note: Vernier products are designed for educational use. Our products are not designed nor are they recommended for any industrial, medical, or commercial process such as life support, patient diagnosis, control of a manufacturing process, or industrial testing of any kind.

What's Included

  • Go Direct Respiration Belt
  • Micro USB Cable

Compatible Software

The Go Direct® Respiration Belt may require a compatible interface and software. Choose a platform below to see compatible interface and software options.

Getting Started

Please see the following link for platform-specific connection information:

www.vernier.com/start/gdx-rb

Bluetooth Connection

USB Connection

  1. Install Graphical Analysis 4 on your computer, Chromebook™, or mobile device. See www.vernier.com/ga4 for software availability.
  2. Charge your sensor for at least 2 hours before first use.
  3. Turn on your sensor by pressing the power button once. The Bluetooth® LED will blink red.
  4. Launch Graphical Analysis 4.
  5. Click or tap Sensor Data Collection.
  6. Click or tap your Go Direct sensor from the list of Discovered Wireless Devices. Your sensor's ID is located near the barcode on the sensor. The Bluetooth LED will blink green when it is successfully connected.
  7. This is a multi-channel sensor. The active channel is listed in the Connected Devices Sensor Channels list. To change channels, select the check box next to the Sensor Channel(s) you would like to activate.
  8. Click or tap Done to enter data‑collection mode.
  1. If using a computer or Chromebook, install Graphical Analysis 4. If using LabQuest 2, make sure LabQuest App is up to date. See www.vernier.com/ga4 for Graphical Analysis 4 availability or www.vernier.com/downloads to update LabQuest App.
  2. Connect the sensor to the USB port.
  3. Launch Graphical Analysis 4 or turn on LabQuest 2. You are now ready to collect data.
  4. This is a multi-channel sensor. To change the default channel selections, see www.vernier.com/start/gdx-rb

Charging the Sensor

Connect the Go Direct Respiration Belt to the included USB Charging Cable and any USB device for two hours.

You can also charge up to eight Go Direct Respiration Belts using our Go Direct Charge Station, sold separately (order code: GDX-CRG). An LED on each Go Direct Respiration Belt indicates charging status.

Charging

Orange LED next to the battery icon is solid while the sensor is charging.

Fully charged

Green LED next to the battery icon is solid when the sensor is fully charged.

Powering the Sensor

Turning on the sensor

Press button once. Red LED indicator next to the Bluetooth icon flashes when the unit is on.

Putting the sensor in sleep mode

Press and hold button for more than three seconds to put into sleep mode. Red LED indicator next to Bluetooth icon stops flashing when sleeping.

Connecting the Sensor

See the following link for up-to-date connection information:

www.vernier.com/start/gdx-rb

Connecting via Bluetooth

Ready to connect Red LED next to the Bluetooth icon flashes when sensor is awake and ready to connect.
Connected Green LED next to the Bluetooth icon flashes when sensor is connected via Bluetooth.

Connecting via USB

Connected and charging Orange LED next to the battery icon is solid when the sensor is connected to Graphical Analysis via USB and the unit is charging. LED next to Bluetooth icon is off.
Connected, fully charged Green LED next to the battery icon is solid when the sensor is connected to Graphical Analysis via USB and fully charged. LED next to Bluetooth icon is off.
Charging via USB,
connected via Bluetooth
Orange LED next to the battery icon is solid when the sensor is charging. Green LED next to the Bluetooth icon flashes.

Identifying the Sensor

When two or more sensors are connected, the sensors can be identified by tapping or clicking Identify in Sensor Information.

Using the Product

Place the Go Direct Respiration Belt around the chest or abdomen of the subject. The sensor does not need to rest on the skin; it can be worn over clothing. Secure the sensor to the subject using the strap and clips provided. For best results, position the sensor box so it is located just below the sternum of the subject. The tension indicator light is located in the bottom left corner of the sensor label, just below the checkmark. If the light is not on, tighten the strap until the light turns green. Loosen the strap if the light turns red. A red light indicates too much tension.

Connect the sensor following the steps in the Getting Started section of the user manual.

Channels

Go Direct Respiration Belt has four measurement channels:

  • Force
  • Respiration Rate
  • Steps
  • Step Rate

Force

Force is a default channel that is active when the sensor is connected. The force channel measures respiration effort. This is the force exerted by the chest during respiration. Inhalation will be observed as an increase in force. Exhalation will be observed as a decrease in force.

Respiration Rate

Respiration Rate is the other default channel that is active when the sensor is connected. This channel detects inhalations and calculates the number of breaths per minute (BPM). The sample window for the calculation is 30 seconds. The advance interval is 10 seconds. The value will update every 10 seconds.

Steps

The Steps channel reports the number of steps that are detected by the sensor. You should zero this channel before collecting data.

Step Rate

The Step Rate channel steps per minute (SPM). The sample window for the calculation is 10 seconds. The advance interval is 10 seconds. The value will update every 10 seconds.

Calibrating the Sensor

Force

The channel is factory calibrated. You should never have to perform a new calibration for the Go Direct Respiration Belt. If you would like to calibrate the sensor, use a one-point calibration. Place the sensor on a flat surface with the label facing upward. Enter 0 N as the known force.

Respiration Rate

The channel is factory calibrated.

Steps

The channel is factory calibrated.

Step Rate

The channel is factory calibrated.

Specifications

Range

0–50 N

Resolution

0.01 N

Response time

50 ms

Respiration rate

  • Sample window: 30 s
  • Advance interval: 10 s

Step rate

  • Sample window: 10 s
  • Advance interval: 10 s

Maximum chest circumference

140 cm

Wireless specification

Bluetooth 4.2

Maximum wireless range

30 m

Battery

300 mA Li-Poly

Battery life (single full charge)

~24 hours

Battery life (long term)

~500 full charge cycles (several years depending on usage)

Care and Maintenance

Battery Information

The Go Direct Respiration Belt contains a small lithium-ion battery. The system is designed to consume very little power and not put heavy demands on the battery. Although the battery is warranted for one year, the expected battery life should be several years. Replacement batteries are available from Vernier (order code: GDX-BAT-300).

Storage and Maintenance

To store the Go Direct Respiration Belt for extended periods of time, put the device in sleep mode by holding the button down for at least three seconds. The red LED will stop flashing to show that the unit is in sleep mode. Over several months, the battery will discharge but will not be damaged. After such storage, charge the device for a few hours, and the unit will be ready to go.

Exposing the battery to temperatures over 35°C (95°F) will reduce its lifespan. If possible, store the device in an area that is not exposed to temperature extremes.

Water Resistance

The Go Direct Respiration Belt is not water resistant and should never be immersed in water.

If water gets into the device, immediately power the unit down (press and hold the power button for more than three seconds). Disconnect the sensor and charging cable, and remove the battery. Allow the device to dry thoroughly before attempting to use the device again. Do not attempt to dry using an external heat source.

How the Sensor Works

The Go Direct Respiration Belt uses a force sensor connected to a nylon strap to measure respiration effort (the force exerted by the chest during respiration). The sensor has two straps. The long strap is adjustable and is attached to a plastic loop on the sensor box. The short strap is attached to a second loop that is connected to a force sensor inside the sensor box. The force sensor measures the amount of force that is applied to the small strap. The straps are placed around the chest of the subject and then connected to each other using the clip. The chest cavity expands with each inhalation. This applies tension to the small strap which is measured by the force sensor. During exhalation, the tension decreases on the strap, so a decrease in force is observed.

Troubleshooting

For best results, position the sensor box so it located just below the sternum of the subject. Make sure the tension indicator light is green before collecting data.

The ideal sampling rate for the sensor depends on the task the subject will be performing. The default sampling rate should be used if the subject is at rest, or will be sitting or standing. A sampling rate of 4 samples per second or slower should be used if the subject is walking.

Only the Force and Respiration Rate channels are enabled by default. Use software controls to enable the steps and step rate channels if desired.

For troubleshooting and FAQs, see www.vernier.com/til/4066

Repair Information

If you have watched followed the troubleshooting steps and are still having trouble with your Go Direct Respiration Belt, contact Vernier Technical Support at support@vernier.com or call 888-837-6437. Support specialists will work with you to determine if the unit needs to be sent in for repair. At that time, a Return Merchandise Authorization (RMA) number will be issued and instructions will be communicated on how to return the unit for repair.

Accessories/Replacements

Item Order Code

Micro USB Cable

CB-USB-MICRO

USB-C to Micro USB Cable

CB-USB-C-MICRO

Go Direct 300 mAh Replacement Battery

GDX-BAT-300

Warranty

Vernier warrants this product to be free from defects in materials and workmanship for a period of five years from the date of shipment to the customer. This warranty does not cover damage to the product caused by abuse or improper use. This warranty covers educational institutions only.

Disposal

When disposing of this electronic product, do not treat it as household waste. Its disposal is subject to regulations that vary by country and region. This item should be given to an applicable collection point for the recycling of electrical and electronic equipment. By ensuring that this product is disposed of correctly, you help prevent potential negative consequences on human health or on the environment. The recycling of materials will help to conserve natural resources. For more detailed information about recycling this product, contact your local city office or your disposal service.

Battery recycling information is available at www.call2recycle.org

Do not puncture or expose the battery to excessive heat or flame.

The symbol, shown here, indicates that this product must not be disposed of in a standard waste container.

Contact Support

Fill out our online support form or call us toll-free at 1-888-837-6437.

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