CGX Dev Kit Manuel utilisateur

Dev Kit

This manual contains general operating instructions, precautionary measures,

maintenance instructions, and information for use of the CGX Dev Kit.

Please read this manual carefully and familiarize yourself with the controls and

accessories before using the product.

Note

• This is an investigational device designed for research and development eorts.

• It is not an FDA-approved medical device.

• There are no known side eects from the use of this product.

CGX A Cognionics Company

The Dev Kit is a portable development-

oriented, dry EEG system. The kit

includes an 8-channel amplifier and

individual leads terminating in snap

connectors. Also included are Drypad,

Flex, and HydroFlex sensors, and

a fabric headband for aid in sensor

placement.

Wireless technology allows the subject

to move about while real-time data is

collected and displayed.

EEG channels are sampled at a time

resolution of 500Hz and converted to

digital data at 24 bits of resolution.

The Dev Kit provides research-grade

signal quality and is ideally suited

for general-purpose EEG and ERP

research in laboratory and field

environments.

Description

Warnings

TheDevKitisintendedtobeusedto

acquiretheelectroenchephalogram

(EEG)andtransmititwirelesslytoa

computer.

ThisDeviceIsIntendedForResearchOnly.

ItIsNotIntendedForTheFollowingUses:

• monitoring of patients in a clinical

environment

• use in medical diagnosis

• on subjects undergoing surgery

• use in sterile environments

• use with sleeping subjects

DoNotUseThisProductInThese

Situations:

• near high-frequency surgical equipment

• if exposed to ionizing radiation

• in oxygen-rich environments (concentration

> 25% at 1 atm)

• in wet environments

• in the presence of ammable anesthetics

or gases

PrecautionsForThePractitioner

• Do not drop, sit on, or step on the amplier

or sensors.

• Check if your subject has a sensitive

dermatological condition causing sensor

intolerance.

• Avoid cross-subject contamination. Do not

use with subjects having open wounds or

scalp infections.

• The Dev Kit headset is not a diagnostic

tool. Any medical diagnosis related to

the EEG should be derived by a certied

physician.

SubjectConsiderations

• This device is intended for human use only.

• Subject should have a healthy scalp.

• Do not use with infants or neonates.

• Test subjects may or may not have hair.

• All sensors must be able to contact the

subject’s scalp.

• The entire headset may come into contact

with the subject’s skin.

FollowTheseAdvisoriesToKeepYour

DevKitInGoodWorkingOrder

• Do not immerse the amplier, sensors, or

leads in liquid.

• Do not expose the system to direct

sunlight or heat source, moisture, vibration,

mechanical shock, excessive dust, or

humidity.

• Do not open, modify or disassemble the

amplier — this will void the warranty.

• Do not use if the amplier or any

accessories are damaged.

• Do not use when amplier or leads are wet.

• Do not use caustic or abrasive cleaners on

the system or sensors.

AlwaysUseSuppliedAccessories

Using accessories other than those supplied

with your Dev Kit system may result in

damage or diminished ecacy of the system.

The Dev Kit uses an internal Lithium-ion

rechargeable battery.

AvoidCross-SubjectContamination

Clean the device and clean or replace

sensors after use following the cleaning

instructions to avoid cross-subject

contamination.

DeviceOverview

DevKitOverview

EEG is the measurement — through the use of sensors and

ampliers — of scalp surface electrical potentials arising

from activity in the cortex.

The Dev Kit is exible and adaptable to a wide variety

of custom EEG experiments. The eight sensor leads

can be placed anywhere around the head, and the

fabric headband keeps sensors in place around the

circumference of the head.

The Dev Kit meets the

mechanical, electrical, and

sensor needs required to

make an eective dry EEG

system.

Conventional wet systems

rely on electrolytic gels

to penetrate hair, contact

the skin, and provide a

conductive path. The gel

serves as a buer lling in

gaps between the sensor

and skin.

No conductive gel is used in a

dry system. The benets are

obvious: faster set-up, and no

after-use clean-up required.

Dry systems are subject to

several challenges. First, the

sensor must directly touch the

scalp or skin, even through

thick hair. Second, the sensor

must remain securely in place

to minimize artifacts and

noise. Finally, the electronics

must tolerate impedances up

to 200 times higher than wet

systems — while rejecting

noise and interference. A

high-end dry solution — like

the Dev Kit — balances

sensors, mechanics and

electronics achieving virtually

the same signal quality as a

traditional wet cap for most

EEG applications.

DeviceOverview

ThePackageContains

TheFollowingItems

Dev Kit Amplier

Bluetooth Dongle

1 Passive Ground Lead Wire

9 Active Lead Wires

10 Flex Sensors

10 Drypad Sensors

10 HydroFlex Sensors

30 Skintact Sensors

Headband

Wall Charger

Carrying Case

Manual

DevKitwithHeadband

Sensors

Active Lead Wires

Amplier

Headband

Optional AurisDK in-

ear sensors available

separately.

DeviceOverview

Amplifier

Wireless amplier

collects signals

and transmits to

Bluetooth Dongle.

BluetoothDongle

High-speed receiver

dongle plugs into

your computer’s

USB port.

ActiveLeadWires PassiveGround

LeadWire

Active lead wire

(3.5mm connector)

for EEG channels.

Passive lead

wire (touchproof

connector) for

Ground.

HydroFlexSensor

HydroFlex

sensors are extra

comfortable for

direct skin contact

and through-hair

applications.

FlexSensor

Flex sensors slide

through hair for

high-quality scalp

contact.

DrypadSensor

Drypad sensors

make direct

skin contact for

ECG and EEG

recordings.

AurisDKIn-Ear

Sensors

Optional in-ear

sensor with

replaceable foam

inserts.

Preparation

1.InstallTheSoftware



Note:CGXAcquisitionsoftwarerunsonWindows

only.

• Navigate to CGXSystems.com

• Select Software from the top navigation menu.

• Select DownloadunderCGXAcquisitionSoftware

• Choose the latest version link under “Downloading and

Installing the Software.”

• Extract the zipped le to your desktop.

• Run CGX Setup and follow the instructions.

• If you see a security warning, select MoreInfo and Run

Anyway

• The software will create a shortcut on your desktop.

Download the latest software

from CGXSystems.com

2.ChargetheInternalBattery

Allow your Dev Kit to fully charge before each use. The

device has a charging indicator light:

• The charging status light is red when the battery is

charging.

• The charging status light is green when the battery is fully

charged.

3.CheckPowerStatusandTriggerStatusLightsOn

TopOfAmplifier

Power

Off Headset O

Green Headset On

Yellow Low Battery

Red Critically Low Battery (replace immediately)

Trigger

The Trigger Status Light is for use with the optional CGX

Wireless StimTrigger, and indicates when the headset is

receiving trigger signals from the StimTrigger unit.

Off Wireless StimTrigger Out Of Range

Blue Wireless StimTrigger In Range

Charging

Charger

Input

Charging

Status Light

Amplifier

Power Button

Power Status

Light

Status light for optional

Wireless StimTrigger

Preparation

4.InsertBluetoothDongle

Plug the dongle into your computer and Windows should

automatically install the correct drivers. Verify driver

installation by checking the Device Manager for problems,

marked by a yellow exclamation mark.

• The dongle is specic to each headset.

• For best performance, ensure a clear line of sight

between the dongle and the front of the headset

If Windows did not successfully install the driver for the

dongle, refer to the FTDI driver installation manual on

our website.

Each Dev Kit is permanently paired to a receiver dongle.

The pair automatically discover and initiate a connection

when both are powered on and within a 10m range.

The light on the dongle indicates its current state:

Green Power On, Not Paired

Purple Searching For Device

Blue Device Found

FlashingBlue Data Transmitting

5.StartTheAcquisitionSoftware

Once you’ve established a connection, data should begin

to stream.

Double click on the CGX Acquisition software icon. You

should see CGXDevKitunder DiscoveredDevices.

If you do not see the name CGX Dev Kit, remove and

re-insert the dongle and restart the software.

1. First, click the device name in this window to select the

Dev Kit

2. Then click Connect.

You should now see the device conguration window.

If you do not, double check to make sure the

Dev Kit is powered on.

Click StartDevice.

You will now see data streaming into the display. Click the

Channels tab on the top right-hand side of the program.

This will bring you to the impedance check. You are now

ready to use the device.

Dongle

Status Indicator Light

Preparation

6.SelectSensors

Drypad Sensors

Use Drypad sensors in positions where the subject has no

hair (forehead and bald areas).

Flex Sensors

Use Flex sensors to penetrate hair. On most subjects, these

are all the positions except Fp1, Fp2, F7 and F8.

HydroFlex Sensors

Use moistened HydroFlex sensors to penetrate hair, and

with sensitive subjects. Moistening with a dab of water prior

to use improves signal quality in dry environments.

Skintact Sensors

Use Skintact sensors for direct skin contact.

AurisDK In-Ear Sensors (optional)

Use AurisDK sensors for in-ear measurements.

7.Typical8-ChannelMontageUsingTheHeadband

This is a typical circumferential montage, with Reference at

the mastoid, and Ground set where convenient.

1. Insert the headband through the mounting slots on the

amplier.

2. Plug the passive touchproof ground connector into the

GGround port.

3. Plug an active 3.5mm lead into the RReference port.

4. Attach Skintact sensors to the Reference and Ground

leads. Ensure good contact between these sensors and

the skin.

Note: Reference and Ground contacts are essential to

the functioning of the device.

5. Connect as many leads as desired to the Dev Kit and

attach the sensor of your choosing to the end of each

lead.

6. Place the sensors around the head using the headband

to secure the leads in place.

Drypad Sensor for

direct skin contact

Flex Sensor for hair

HydroFlex Sensor for

sensitive subjects

AurisDK In-Ear Sensors

available separately

It may require extra pressure

to insert a sensor due to

variability in surface coating.

Try that sensor in an alternate

pod location in case of a

particularly tight t.

AttachSensorToLead

8.OptimizeSensorContact

After properly positioning the sensors on the subject, obtain

direct contact on all sensors before recording.

Bring up the impedance check in the CGX Data Acquisition

software under the Channels tab. The impedance check

presents a color-coded map of the sensors on the device,

corresponding to contact level:

Red Impedance out of range

(>5,000 kΩ default)

Light Green Impedance at top end of range

(2,500-5,000 kΩ default)

Dark Green Impedance at bottom end of range

(<2,500 kΩ default)

The range of impedances with dry sensors may be higher

than what you are accustomed to when working with

conventional wet sensor ampliers. CGX devices utilize

a combination of advanced electronics, shielding, and

mechanics to obtain EEG signals even when contact is

poor, and can tolerate sensor impedance up to 5,000 kΩ.

9.AdjustSensors,IfRequired,ToImprove

ImpedanceMeasurements

Check for acceptable impedance measurements on each

channel.

To ensure good impedance measurements:

• Lift the sensor slightly to move hair aside.

• Lower the sensor back in place, keeping the sensor

aligned to the subject’s head.

• Lightly press down, holding for 5 seconds, then gently

release the sensor.

10.RecordAnEEG

After you have acceptable impedance levels, click Record

under the Device tab to begin your recording. To end the

recording, under the same tab, click StopRecording.

11.EndTheSession

Close out the current le in the software if one is active and

exit the program. Press the power button once to turn o

the device.

DonningInstructions

Ground must be applied for

impedance check to operate.

ImpedanceMap

UnderTheChannelsTab

Marginally

Acceptable Unacceptable

Acceptable

PositionOfTheSubject

DuringEEG

Use the Dev Kit headset

for subjects in an upright

position. Do not let the

subject lie or sleep on the

sensors. It may damage the

system.

CleaningAndMaintenance

To avoid cross-subject contamination, follow the cleaning

instructions to clean sensors, amplier, and headband after

each use.

This device is not intended to be sterilized in an autoclave.

CleaningSensors

• Use hand sanitizer or 70% isopropyl-based alcohol wipes

to clean Drypad and Flex sensors according to cleaning

agent instructions.

• Do not use 90% or 99% alcohol. These solutions will

damage the sensors.

• Check sensors regularly. Sensor functionality is important

to maintaining signal quality. Replace sensors if signal

quality degrades.

• Contact CGX for replacement sensors.

CleaningTheLeadsandAmplifier

• Use 70% isopropyl-based alcohol wipes to clean the

leads and amplier.

• Do not use 90% or 99% alcohol. These solutions will

damage the system.

Storage

• Transport system in the case.

• Store in a temperature and humidity controlled room.

DoNotLetTheAmplifierComeIntoContact

WithLiquid

Immediately turn o the system out and let the amplier dry

completely before resuming use.

DisposalInstructions

To protect the environment, always follow local law, rules,

and policies regarding electronic and battery disposal. You

may also return the device to CGX for proper disposal.

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