eego EE-21 series, EE-22 series, EE-212, EE-211, EE-213 User Manual

eego™ amplifier EE-21x EE-22x

User Manual

eego amplifier

EE-211, EE-212, EE-213, EE-214, EE-215 / version 1.2
EE-221, EE-222, EE-223, EE-224, EE-225 / version 1.2

User Manual Revision 5, July 2016
Copyright eemagine Medical Imaging Solutions GmbH.

All rights reserved.

eego amplifier EE-21x EE-22x User Manual

Rev. 5, DRN-PDO-1664 2 of 26 2016-07-11

MANUFACTURER

eemagine Medical Imaging Solutions GmbH

Gubener Str. 47

D-10243 Berlin, Germany

Phone: [phone]

E-Mail: [e-mail]

IMPORTANT NOTICES

Following the European Medical Device Directive 93/42/EEC Annex IX, eego amplifier is a CE class IIa
medical device.

This User Manual only covers the EE-21x and EE-22x variants of the eego amplifier. Refer to
dedicated User Manual for other variants.

For US customers only:
Rx only

Caution: Federal Law (USA) restricts this device to sale by or on the order of a physician.

DISCLAIMER

We have attempted to write this document as accurately as possible. However, mistakes are bound
to occur, and we reserve the right to make changes to the products, which may render parts of this
document invalid.

No part of this document may be copied or reproduced without the explicit permission of the
authors.

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TABLE OF CONTENTS

1 General Information ......................................................................................................................... 4

1.1 About this Document ................................................................................................................. 4

1.2 Intended Use .............................................................................................................................. 4

1.3 Technical Data and Features Overview ...................................................................................... 4

1.4 Safety Warnings ......................................................................................................................... 5

1.4.1 Important information ........................................................................................................ 5

1.4.2 Safety measures .................................................................................................................. 5

1.4.3 Precautionary measures ...................................................................................................... 6

1.4.4 Warnings .............................................................................................................................. 6

1.5 Maintenance and Cleaning ........................................................................................................ 7

1.6 Disposing of Waste Equipment .................................................................................................. 7

1.7 Product Variants ......................................................................................................................... 8

1.8 PC Requirements ........................................................................................................................ 8

1.9 Contact Information ................................................................................................................... 8

2 The eego amplifier, Hardware SETUP description ............................................................................ 9

2.1 The eego amplifier ..................................................................................................................... 9

2.2 Biosignal and Impedance Measurements ................................................................................ 13

2.3 Recording Trigger Input ............................................................................................................ 14

2.4 Mounting Options for the eego amplifier ................................................................................ 14

2.5 Battery and Charger for the eego amplifier ............................................................................. 15

2.6 LED and SOUND Status Indicators for the eego amplifier ....................................................... 16

APPENDIX A: CONNECTORS AND PINNING TABLES .............................................................................. 17

EEG Connectors (Referential) ............................................................................................................ 17

Bipolar Connector .............................................................................................................................. 18

Trigger Connector .............................................................................................................................. 19

Power and USB Connector ................................................................................................................. 20

APPENDIX B: AMPLIFIER TECHNICAL SPECIFICATIONS (EMC) ............................................................... 21

APPENDIX C: EXPLANATION OF SYMBOLS............................................................................................. 23

APPENDIX D: Datasheet......................................................................................................................... 24

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1 GENERAL INFORMATION

1.1 ABOUT THIS DOCUMENT

With this document, we provide you with all information required to set up and start working with
the eego amplifier.

If you encounter problems with the device that cannot be resolved using this document please
contact us directly via [e-mail] for further help (please make sure to state the
product ID and serial number of your amplifier in the Subject section of your email).

We will coordinate communication with your dealer in case you purchased the device locally.

1.2 INTENDED USE

The eego amplifier is intended to be used by or under the direction of a physician for acquisition of
EEG signals and to transmit them digitally to a computer.
The device is intended for use on humans.
The device is intended for use in a clinical environment (e.g., hospital, physician’s office, etc).
The device is not intended for use in life support systems.

1.3 TECHNICAL DATA AND FEATURES OVERVIEW

The eego amplifier has been designed as a mobile recording device for high-density EEG and other
electrophysiological signals. It provides access to recorded data over a USB connection to external
software over its signal driver interface. The eego amplifier comes with a built-in rechargeable
battery for mobile applications and recordings of several hours.

This ultimate solution for mobile EEG recording provides maximum 64 channels of referential EEG
and (optionally) synchronously recorded 24 bipolar input signals.

The eego amplifier is used in combination with the eego recording software, a 64-channel or 32-
channel EEG headcap and other optional accessories.

The eego amplifier has one 8-bit trigger input channel accessible through high-density connectors.
Impedance values can be measured for all referential electrodes as well as the reference and patient
ground electrode. An active shielding technique protects the EEG inputs from grid interference noise.
Sampling rate and gain can be set through the user interface of the control software.

Detailed technical specifications, environmental conditions, the available product variants and PC
requirements are given in the APPENDIX D: Datasheet for eego amplifier.

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1.4 SAFETY WARNINGS

The following warnings and cautions apply to the eego amplifier:

 Proper use of the eego amplifier depends on careful reading of all instructions and labels that

come with or on the device inaccurate measurements may be caused by incorrect use of the
device.

 Non-compliance with warnings and safety regulations may result in severe personal injury!

If you are uncertain or have any questions about operational safety or about any of the warnings and
cautions, then do not hesitate to call or email:

eemagine Medical Imaging Solutions GmbH
Gubener Str. 47
D-10243 Berlin, Germany
Phone: [phone]

E-Mail: [e-mail]
http://www.eemagine.com

For warnings and safety regulations concerning waveguard EEG caps, please refer to the
corresponding manual.

1.4 .1 IM P ORTANT INFORM ATION

 There are no known side effects from the use of this equipment.
 ONLY APPLICABLE TO THE USA: Under federal law this apparatus may only be sold by or on the

order of a physician or licensed practitioner. The apparatus may only be used under the constant
supervision of or on the instructions of a physician or other authorized medical professional.

1.4 .2 SA FETY MEAS URES

 The only external power supply that may be used is the original device supplied

together with the amplifier. DO NOT replace it with anything else. If any third-party
type of power supply is used then patient safety is not guaranteed.

 Make sure that the wall socket is well earthed.
 Inspect the power cord on a regular basis for damages. Do not operate the device with a

damaged power cord.

 The eego amplifier contains LITHIUM-ION BATTERIES. In case of damaged amplifier housing and

to the battery cells inside the housing, metallic Lithium tends to spontaneous formation of
flames when in air contact. Make sure to quarantine any amplifier with damaged battery cells
and inform eemagine support immediately.

 Do not connect active sensors or electrodes to any of the inputs of the amplifier.
 Do not use the device with adapters, EEG caps or other devices not explicitly listed to be

compatible with the device.

 Take care when arranging sensor cables to avoid risks of entanglement or strangulation.

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 Reusable electrodes present a potential risk of cross-contamination. Please refer to the

documentation that came with your electrodes for instructions on how to prevent this.

 Do not connect the device to a patient undergoing MRI, electro-surgery or defibrillation.
 Do not modify the equipment. Never attempt to unscrew any parts of the amplifier.
 Do not attempt to open the battery compartment of the amplifier.
 ELECTRICAL SHOCK HAZARD: Do not connect electrode inputs to earth ground.

Connecting an earth ground might result in electrocution.

 ELECTRICAL SHOCK HAZARD: Servicing of the equipment is to be done by approved

technicians only.

1.4 .3 PRE CAUT IONA RY ME ASURES

 When the amplifier is not in use, please make sure to switch it off. The device will switch of

automatically after the batteries are discharged below a given limit. With batteries completely
discharged, the device can only be switched on while the power supply is attached.

 The amplifier needs special precautions regarding EMC and needs to be installed and put into

service according to the EMC information provided in APPENDIX B: AMPLIFIER TECHNICAL
SPECIFICATIONS (EMC); the use of accessories other than specified may result in increased
emissions or decreased immunity of the eego amplifier.

 The eego amplifier should not be used adjacent to or stacked with other equipment; if this is still

necessary, verify normal operation in the configuration in which it will be used. Do also not stack
multiple eego amplifiers directly on top of each other. Allow for some spacing of several cm in
between.

 The use of portable and mobile RF communications equipment can adversely affect the

recording; do not use an operating cellular phone within 30 cm of the amplifier, the cables and
the electrodes to avoid excessive noise on the signals. See also in APPENDIX B: AMPLIFIER
TECHNICAL SPECIFICATIONS (EMC).

 Disposable electrodes which are used for electrophysiological measurements may pose a

biohazard. Handle, and when applicable, dispose of these materials in accordance with accepted
medical practice and any applicable local, state and federal laws and regulations.

1.4 .4 WARNING S

 Safety and performance of the device are not guaranteed when it is used together

with accessories that were not explicitly listed as compatible.

 The device is not defibrillator-proof.
 The device is not suitable for use in an inflammable mixture of anesthetics and air, oxygen or

nitrous oxide.

 No chemical agents are to be used with the device.
 The device is not to be immersed in any liquid and should not be exposed to rain.
 If any liquids or moisture penetrate the device or a part thereof, turn the device off, remove the

plug from the wall socket and have the device checked by the manufacturer.

 Do not expose the device to direct sunlight, heat from a source of thermal radiation, excessive

amount of dust, moisture, vibration, or mechanical shock.

 Do not wind the cables in a loop smaller than 5 cm or bend them sharply, as this may damage the

cables.

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 During operation with an active connection via USB to a compatible computer, do not connect

other USB devices, and do not make changes to any connections.

 If the eego amplifier is upgraded or replaced for any reason, make sure to have the control

software and interfacing computer checked for compliance by eemagine support before
continuing to work with the device. Similarly have the eego amplifier checked for compliance
when the control software or computer is upgraded or replaced.

 During operation place the device in such a way that connectors and cables are easily accessible.
 Do not use sharp objects such as pencil-points or pen-tips to manipulate the buttons on the

control panel, as this may cause damage.

 Do not use the device whenever parts of it are damaged.
 The eego amplifier’s soft-shell must be handled with care and must not be removed from the

device. It may tear otherwise.

1.5 MAINTENANCE AND CLEANING

We would like to give a few general recommendations that may help to keep your equipment in
good shape and ensure high quality of recordings.

The amplifier is mechanically robust – within limits. Try to protect the device as much as possible
from falling and heavy mechanical shocks. Please take special care that the USB cable and the
connectors on either side are not under mechanical stress. A broken USB connection may lead to
expensive and time-consuming repair of the amplifier.

The EEG head-cap and trigger connectors may be attached to the amplifier with the available screws
on the connector in case of expected movement of the patient/subject. The screws do not need to
be extremely tight but just hold the connectors in place, so please tighten the screws gently.

The expected lifetime is 5 years.

If the amplifier requires cleaning, please use a dry cloth to remove dirt (e.g. gel remainders). Do not
use alcohol or cleaning chemicals.

1.6 DISPOSING OF WASTE EQUIPMENT

Various parts of the eego amplifier device bear the symbol for special waste
disposal regulations (EU). The symbol means that the products must not be

disposed of with regular waste. Instead, it is the user’s responsibility to dispose of

waste equipment by handing it over to a designated collection point for the
recycling of waste electrical and electronic equipment. The separate collection and
recycling of your waste equipment at the time of disposal will help to conserve natural resources and
ensure that it is recycled in a manner that protects human health and the environment. For more
information about where you can drop off your waste equipment for recycling, please contact your
local city office, your household waste disposal service, or the manufacturer.

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1.7 PRODUCT VARIANTS

See the APPENDIX D: Datasheet.

1.8 PC REQUIREMENTS

See the APPENDIX D: Datasheet.

1.9 CONTACT INFORMATION

For more information and for reporting problems with eego amplifier, please contact eemagine at:

eemagine Medical Imaging Solutions GmbH

Gubener Str. 47

D-10243 Berlin, Germany

Phone: + 49 30 29048404

E-Mail: [e-mail]

http://www.eemagine.com/

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2 THE EEGO AMPLIFIER, HARDWARE SETUP DESCRIPTION

2.1 THE EEGO AMPLIFIER

The eego amplifier device has been designed for ultra-mobile applications of high-density EEG and
other electrophysiological signals. The compact electronic device is battery-powered and gives access
to 64 referential input channels as shown in Figure 2-1 or only 32 channels as shown in Figure 2-2.
Some variant restrict the number of channels to 16 but they still use the EEG IN 1 connector.

At the rear (Figure 2-3 and Figure 2-4) 24 additional bipolar input channels can be connected
(optional, not for all amplifier types). Further a USB connector (plug type B, straight) provides access
to data communication and hardware control.

Figure 2-1. The eego amplifier EE-211 amplifier shown from the front. The amplifier (white) is mechanically protected by
the eego amplifier soft-shell (blue). Two high density connectors (EEG IN 1 and EEG IN 2) provide access to 64 shielded
referential inputs, reference and ground. The openings allow securing the amplifier, e.g., on the table.

Figure 2-2. The eego amplifier EE-212 shown from the front. Only 32 shielded referential inputs are available.

Trigger input can be recorded from devices that deliver TTL output. The high-density connector at the
back side, next to the USB connector, provides 8 independent input lines and a ground connection.
The trigger ground and the trigger lines are electrically isolated from the other electrical parts of the

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amplifier. The trigger adapter XS-230 allows to connect eego amplifier with DSUB25 compatible
trigger sources.

Figure 2-3. The eego amplifier shown from the rear. The ON/OFF pushbutton to the left is the power button. The
TRIGGER high density connector gives access to 8 electrically decoupled TTL lines for recording of synchronized trigger
input. The USB 2.0 connector provides access to control the hardware and to stream data. The DC IN 12 V power input is
compatible with the charger delivered with the device.

Figure 2-4. The eego amplifier shown from the rear with the optional bipolar channel high density connector (24 bipolar
channels).

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Figure 2-5. Side view of the eego amplifier with soft-shell. The LED light bars at the left and right sides work
symmetrically and contain multicolor LEDs for DATA and POWER status.

eemagine Medical Imaging Solutions GmbH
Gubener Str. 47
10243 Berlin, Germany

Product Name: eego™ amplifier
Product Code: EE-211
Revision Nr: 1.2

000123 2015

Figure 2-6. The product label at the bottom of the amplifier device shows manufacturer information, product name, code
and revision, and serial number, year of production and CE marking. The symbols in the bottom row points are explained
in Appendix C. The product code as shown, EE-211, will read EE-21x and EE-22x for corresponding different amplifier
types. Amplifier revisions below 1.2 were delivered as type CF. For revision 1.2 and above type BF is the standard (man in
box symbol). Type CF is still available on request. The manufacturer label for CF amplifiers looks slightly different

(showing the hart symbol and a product code with a CF extension).

Rx only

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Figure 2-7. Compatible waveguard cap CA-200, 64 electrodes plus GND (medium size shown). The white labels on the
cable indicate product code, (and on other side of label) manufacturer information and serial number.

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2.2 BIOSIGNAL AND IMPEDANCE MEASUREMENTS

Measurements of physiological parameters such as EEG require highest quality and fidelity of the
electronic equipment and sensors used with it. The eego amplifier has been developed on the basis
of latest state of the art core electronic components (integrated circuits). The modern chip-set
allowed miniaturizing hardware without compromises in signal quality and keeping the power
consumption at a minimum. The device weighs less than 500 grams and has a small form factor, as it
should be for mobile use.

The input stage of the 64 referential input channels to the amplifier has been optimized for high­density EEG recorded with waveguard head caps. The preamplifier component implements active
shielding, which greatly suppresses external noise effects that typically contaminate EEG signals.
Active shielding works such that the buffered input signal (no amplification of signal amplitude but
impedance transformation) is put on the coaxial shield of an electrode lead inside the waveguard
cap. This way, electrical transmission of external noise through the coaxial shield into the lead is
minimized due to the nearly perfect “shorting” (zero voltage difference) between the lead and its
shield.

The input stage of the amplifier registers incoming signals against a common dedicated passive
reference electrode. The measured voltages thus all depend upon the quality of the reference signal
and it is highly recommended to pay attention to good preparation of the reference.

In order to measure physiological signals with high sensitivity, the human body acting as a source of
voltage differences and the amplifier ground (the electrical zero-point from which the operating
range is determined) have to be connected. This can be - for convenience - an electrode lead in the
waveguard cap: the model CA-200 defines AFz to be the ground (GND) position. Nonetheless, any
other accessible body part can be used to make the GND connection – with no effect on the
measured signal amplitudes. For a good suppression of common-mode signals, it may actually be
more suitable to place the GND at some distance from the scalp electrode. The cap therefore
provides access to the GND with a microcoax socket in the cap cable near the neck (note that there is
a second socket for connection of an EOG lead). See the cap datasheet and its user guide for more
information.

The GND connection actually implements a driven ground, i.e. a small voltage of ca. 2.5 Volts relative
to the internal amplifier ground is put on the human body. Electrical currents are kept well below
limits defined for patient safety in medical devices and order of magnitude smaller than currents
flowing in impedance measurements. The driven ground allows measuring signal amplitudes of the
voltage of the driven ground without saturation effects, regardless of the polarity of the signal. The
actual signal range is determined by the amplification factor of the input stage, which is
programmable in steps.

With the eego amplifier you can record bipolar signals using a referential setup and by re-referencing
in the eego software application. Please refer to corresponding documentation for more details how
to prepare the configuration with the appropriate adapter (XS-260).

Further you can record true bipolar signals via the dedicated bipolar input ports at the rear of the
housing. Two terminals per channel are available and must be connected.

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Regardless of referential or bipolar recordings the amplified data stream of input signals is converted
from analog (continuous in amplitude and time) to digital (discrete in amplitude and time). Both
dimensions – voltage and time – are digitized in a way that the analog waveforms can be
approximated without loss of quality in further review and analysis steps. The minimum step width is
in the order of (less than) ms (milliseconds) and a few nV (nano Volts), depending on the selected
sampling rate, signal range and resolution (see eego amplifier datasheet). Each signal is treated by its
own converter, so that no multiplexing effects occur.

The digital data stream is then converted into a protocol suitable for computer communication
(USB). Communication between computer and amplifier works in two ways: control commands sent
by the application software make sure that the amplifier takes the requested actions, and the
amplifier sends EEG data, trigger and status information in the respective operation mode.

The application software sets up communication with USB 2.0 (USB 3.0 is fully compatible with USB

2.0 standard) and provides user interfaces to display and record the measurements.

2.3 RECORDING TRIGGER INPUT

In case you want to record event-related activity, we assume you have available a PC with
presentation software, which is able to deliver TTL pulses along a parallel port cable (DSUB 25 pin
connector, male) with pinning compatible with the description in Appendix A.

WARNING: Make sure that the computer generating the trigger signals is compliant with
IEC 60950.

To run an ERP experiment, please insert the trigger adapter XS-230 into the high-density trigger input
of the amplifier. The DSUB connector at the other end of the adapter is connected with a parallel
port cable that links with the DB25 port of the presentation PC (cable, presentation PC and software
not provided with the eego amplifier).

The 8-bit trigger information is encoded in a decimal trigger code (from 1 to 255) in the recording
software.

Please be aware that only rising flanks are detected as triggers and as high trigger bits! A trigger
pulse should have a length of at least 2-3 times the reciprocal of the sampling rate. In between
triggers the Low level must also be hold for 2-3 times the reciprocal of the sampling rate.

2.4 MOUNTING OPTIONS FOR THE EEGO AMPLIFIER

The eego amplifier can be used as a stationary device or as a mobile device.

When using eego amplifier as a stationary device, please make absolutely sure that the amplifier
cannot drop from the table, e.g. when the patient is connected with the cap and tries to walk away
or when the USB cable is dragged over the table sides. You can for example put a string through the
mounting holes to fixate the amplifier box.

In mobile EEG applications, we strongly recommend to mechanically protect the amplifier with the
eego amplifier soft-shell. Do not remove the soft-shell from the amplifier.

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2.5 BATTERY AND CHARGER FOR THE EEGO AMPLIFIER

The eego amplifier comes with a built-in rechargeable Li-Ion battery. The battery provides several
hours of operation time. The exact value may vary depending on the operation mode of the amplifier
(more current is drawn from the battery in impedance measurement mode), operating temperature
and aging effects of the battery similar to other battery-driven devices. The charging process takes
usually less than 2 hours to complete.

The LED light-pipes at the side edges of the eego amplifier communicate POWER and DATA status as
well as possible hardware problems. The two multi-color LED indicators at each side operate
symmetrically.

The following table gives a description of the battery status as shown with the POWER LED.

POWER
LED color*)

Battery
Status

Description

Red

Low

Battery is in the low charging state. You should stop the recording and
recharge the amplifier immediately.

Yellow

Medium

Battery is in medium state. At least 1 hour of operation time remains but
the device should be recharged now. Do not start a new recording.

Green

High

Battery charging state is high.

Table 2-1 Display of battery status as shown with the POWER LEDs.

The POWER indicator light is breathing, i.e. brightness of the LEDs is oscillating slowly, when the
battery is charged (supposing that the power supply is attached). Please remember that for best
signal quality the power supply should not be attached while recording with the amplifier.

In case you experience drastically reduced battery operation times of the amplifier, please contact
Support for options to check the device and possibly to exchange the battery.

WARNING: Do not attempt to open the amplifier or battery compartment yourself!

The battery charger for eego amplifier comes with a power cord and plug fit for a particular region. A
green LED indicator in the power supply shows whether the device is turned on.

*) The LED indicators are not active when the amplifier is turned off. Nevertheless, the device will
be charged when the power supply is connected. You can check the charging status by turning on
the device.

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2.6 LED AND SOUND STATUS INDICATORS FOR THE EEGO AMPLIFIER

The LED light-pipes at the side edges of the eego amplifier communicate POWER and DATA status as
well as possible hardware problems. The two multi-color LED indicators at each side operate
symmetrically.

The DATA LED indicator can have the following states:

DATA LED
color

Visual indication

Description

OFF - Amplifier is switched OFF

Green

Constant

Amplifier is ON, no data is acquired

Green

Breathing*

Data is acquired (streamed)

Yellow

Breathing*

Impedance data is acquired (streamed)

Red

Constant

Device error, restart device, contact support

Table 2-2 status as shown with the DATA LEDs. (* brightness of the LEDs is oscillating slowly)

A built-in beep indicates important changes of the status:

SOUND
signal

Description

2 beeps

first low, second high

Amplifier is switched ON

2 beeps

first high, second low

Amplifier is switched OFF

3 beeps

Amplifier is fully charged

Table 2-3 Sound signals as relevant for power status.

The LED and sound indicators are not active when the amplifier is turned off. Nevertheless, the
device will be charged when the power supply is connected. You can check the charging status by
turning on the device.

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APPENDIX A: CONNECTORS AND PINNING TABLES

EEG CONNECTORS (REFERENTIAL)

The eego amplifier has two EEG input connectors, EEG IN 1 and EEG IN 2. The 68-pin high-density,
high-quality connectors give access to the 64 shielded referential inputs, the reference electrode and
the patient ground, and are typically used according to the pinning tables below.

eego amplifier EEG IN 1 connector

eego amplifier EEG IN 2 connector

Channel
Number

Electrode

CA-200/201

Pin numbers, 68-pin
high-density connector

Channel
Number

Electrode

CA-200

Pin numbers, 68-pin
high-density connector

active

shield

active

shield

-

GND

34

68 -

not connected

34

68

Ref 1

Fp1

33

67

Ref 33

AF7

33

67

Ref 2

Fpz

32

66

Ref 34

AF3

32

66

Ref 3

Fp2

31

65

Ref 35

AF4

31

65

Ref 4

F7

30

64

Ref 36

AF8

30

64

Ref 5

F3

29

63

Ref 37

F5

29

63

Ref 6

Fz

28

62

Ref 38

F1

28

62

Ref 7

F4

27

61

Ref 39

F2

27

61

Ref 8

F8

26

60

Ref 40

F6

26

60

Ref 9

FC5

25

59

Ref 41

FC3

25

59

Ref 10

FC1

24

58

Ref 42

FCz

24

58

Ref 11

FC2

23

57

Ref 43

FC4

23

57

Ref 12

FC6

22

56

Ref 44

C5

22

56

Ref 13

M1

21

55

Ref 45

C1

21

55

Ref 14

T7

20

54

Ref 46

C2

20

54

Ref 15

C3

19

53

Ref 47

C6

19

53

Ref 16

Cz

18

52

Ref 48

CP3

18

52

Ref 17

C4

17

51

Ref 49

CP4

17

51

Ref 18

T8

16

50

Ref 50

P5

16

50

Ref 19

M2

15

49

Ref 51

P1

15

49

Ref 20

CP5

14

48

Ref 52

P2

14

48

Ref 21

CP1

13

47

Ref 53

P6

13

47

Ref 22

CP2

12

46

Ref 54

PO5

12

46

Ref 23

CP6

11

45

Ref 55

PO3

11

45

Ref 24

P7

10

44

Ref 56

PO4

10

44

Ref 25

P3 9 43

Ref 57

PO6 9 43

Ref 26

Pz 8 42

Ref 58

FT7 8 42

Ref 27

P4 7 41

Ref 59

FT8 7 41

Ref 28

P8 6 40

Ref 60

TP7 6 40

Ref 29

POz 5 39

Ref 61

TP8 5 39

Ref 30

O1 4 38

Ref 62

PO7 4 38

Ref 31

O2 3 37

Ref 63

PO8 3 37

Ref 32

EOG 2 36

Ref 64

Oz 2 36 - REF 1 35 -

not connected

1

35

One of the connectors can also be used with the XS-260 bipolar adapter; see its datasheet for details.

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BIPOLAR CONNECTOR

The eego amplifier has one bipolar input connectors, BIPOLAR IN. The 50-pin high-density, high­quality connectors give access to the 24 bipolar inputs and the patient ground. The patient ground is
identical to the referential channel patient ground. Only one patient ground connection should be
established and used when preparing a subject. Pin 50 on the connector is unused and reserved for
internal use.

eego amplifier BIPOLAR IN connector

Channel
Number

Pin numbers, 50-pin
high-density connector

negative

positive

BIP 1 1 26 BIP 2 2 27

BIP 3 3 28 BIP 4 4 29 BIP5 5 30

BIP 6 6 31 BIP 7 7 32 BIP 8 8 33 BIP 9 9 34

BIP 10

10

35

BIP 11

11

36

BIP 12

12

37

BIP 13

13

38

BIP 14

14

39

BIP 15

15

40

BIP 16

16

41

BIP 17

17

42

BIP 18

18

43

BIP 19

19

44

BIP 20

20

45

BIP 21

21

46

BIP 22

22

47

BIP 23

23

48

BIP 24

24

49 GND

25

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TRIGGER CONNECTOR

The eego amplifier provides an 8-bit trigger input via the 36-pin high-density connector at the
amplifier backside. The trigger connector is compatible with the XS-230 trigger adapter, which should
be used whenever connecting the amplifier with a trigger source (TTL).

WARNING: The trigger source must be compliant with IEC 60950.

eego amplifier trigger connector (and pinning for XS-230)

Pin numbers, 36-pin high­density connector

Pin numbers, 25-pin DSUB
connector (XS-230)

Description

1

-

(not connected)

2

-

(not connected)

3

-

(not connected)

4

-

(not connected)

5

-

(not connected)

6 2 TTL Bit 1

7 3 TTL Bit 2

8 4 TTL Bit 3

9 5 TTL Bit 4

10 6 TTL Bit 5

11 7 TTL Bit 6

12 8 TTL Bit 7

13 9 TTL Bit 8

14

-

(not connected)

15

-

(not connected)

16

-

(not connected)

17

-

(not connected)

18

-

(not connected)

19

-

(not connected)

20

-

(not connected)

21

-

(not connected)

22

-

(not connected)

23

-

(not connected)

24

25

Trigger Ground

25

25

Trigger Ground

26

25

Trigger Ground

27

25

Trigger Ground

28

25

Trigger Ground

29

25

Trigger Ground

30

25

Trigger Ground

31

25

Trigger Ground

32

-

(not connected)

33

-

(not connected)

34

-

(not connected)

35

-

(not connected)

36

-

(not connected)

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POWER AND USB CONNECTOR

The power connector of the eego amplifier is compatible with the DC output cable of the supplied
battery charger. Do not connect any other power source to the amplifier!

The USB connector of the eego amplifier is typically connected with the USB port of a computer (USB
plug type A). This cable is necessary for data transmission. It does not power the amplifier or battery
but supplies the electrically isolated USB communication module. Please inspect the settings for the
USB ports available at your computer, and make sure ‘power saving’ options are turned off for the
USB ports.

Figure A-0-1. The label of the compatible power supply.

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APPENDIX B: AMPLIFIER TECHNICAL SPECIFICATIONS (EMC)

The compliance in the tables below is valid for eego amplifier with following accessories:

Part

Cable length (m)

Power supply XP Power Model AFM45US12C2

1.9

USB cable

1.8

XS-230 trigger adapter DB25

0.3

CA-2xx waveguard caps (tests below performed with CA-200)

1.2

XS-260 adapter for 16 bipolar channels (connection equivalent
to a set of 32 unipolar EEG inputs)

0.8

Guidance and manufacturer’s declaration – electromagnetic emissions

The eego amplifier is intended for use in the electromagnetic environment specified below. The customer and/or user of the
eego amplifier should ensure that it is used in such an environment.

Emission Test Compliance

Compliance

Electromagnetic Environment - guidance

RF Emissions CISPR 11

Group 1

The eego amplifier uses RF energy only for its internal
function. Therefore, its RF emissions are very low and are
not likely to cause any interference in nearby electronic
equipment.

RF Emissions CISPR 11

Class B

The eego amplifier is suitable for use in all establishments,
including domestic and those directly connected to the
public low-voltage power supply network that supplies
buildings used for domestic purposes.

Harmonic Emissions

IEC 61000-3-2

Not applicable

Voltage Fluctuations/ Flicker
Emissions

IEC 61000-3-3

Not applicable

Guidance and manufacturer’s declaration – electromagnetic immunity

The eego amplifier is intended for use in the electromagnetic environment specified below. The customer and/or user of the
eego amplifier should ensure that it is used in such an environment.

Immunity Test

IEC 60601 test level

Compliance level

Electromagnetic Environment - guidance

Electrostatic discharge (ESD)

IEC 61000-4-2

± 6 kV contact

± 8 kV air

± 6 kV contact

± 8 kV air

Floors should be wood, concrete, or ceramic tile. If
floors are covered with synthetic material, the
relative humidity should be at least 30 %.

Electrical fast
transient/burst

IEC 61000-4-4

± 2 kV for power supply
lines

± 1 kV for input/output
lines

± 2 kV for power supply
lines

± 1 kV for input/output
lines

Mains power quality should be that of a typical
commercial or hospital environment.
Surge

IEC 61000-4-5

± 1 kV line(s) to line(s)

± 2 kV line(s) to earth

± 1 kV line(s) to line(s)

± 2 kV line(s) to earth

Mains power quality should be that of a typical
commercial or hospital environment.

Voltage dips, short
interruptions and voltage
variations on power supply
input lines

IEC 61000-4-11

<5 % UT
(>95 % dip in UT)
for 0,5 cycle

40 % UT
(60 % dip in UT)
for 5 cycles

70 % UT
(30 % dip in UT)
for 25 cycles

<5 % UT
(>95 % dip in UT)
for 5 s

<5 % UT
(>95 % dip in UT)
for 0,5 cycle

40 % UT
(60 % dip in UT)
for 5 cycles

70 % UT
(30 % dip in UT)
for 25 cycles

<5 % UT
(>95 % dip in UT)
for 5 s

Mains power quality should be that of a typical
commercial or hospital environment.

Power frequency
(50/60 Hz) magnetic field

IEC 61000-4-8

3 A/m

3 A/m

Power frequency magnetic fields should be at
levels characteristic of a typical location in a typical
commercial or hospital environment.

NOTE UT is the a.c. mains voltage prior to application of the test level.

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Guidance and manufacturer’s declaration – electromagnetic immunity

The eego amplifier is intended for use in the electromagnetic environment specified below. The customer or the user of the
eego amplifier should assure that it is used in such an environment.

Immunity test

IEC 60601 Test level

Compliance level

Electromagnetic environment – guidance

Conducted RF
IEC 61000-4-6

Radiated RF
IEC 61000-4-3

3 Vrms
150 kHz to 80 MHz

3 V/m
80 MHz to 2.5 GHz

3 Vrms

3 V/m

Portable and mobile RF communications equipment should be
used no closer to any part of the eego amplifier, including cables,
than the recommended separation distance calculated from the
equation applicable to the frequency of the transmitter.

Recommended separation distance

d = 1.2

d = 1.2 80 MHz to 800 MHz

d = 2.3 800 MHz to 2.5 GHz

where P is the maximum output power rating of the transmitter in
watts (W) according to the transmitter manufacturer and d is the
recommended separation distance in metres (m).

Field strengths from fixed RF transmitters, as determined by an
electromagnetic site survey,a) should be less than the compliance
level in each frequency range.b)

Interference may occur in the vicinity of equipment marked with
the following symbol:

NOTE 1 At 80 MHz and 800 MHz, the higher frequency range applies.

NOTE 2 These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection from
structures, objects and people.

a) Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and land mobile radios, amateur

radio, AM and FM radio broadcast and TV broadcast cannot be predicted theoretically with accuracy. To assess the electromagnetic
environment due to fixed RF transmitters, an electromagnetic site survey should be considered. If the measured field strength in the
location in which the eego amplifier is used exceeds the applicable RF compliance level above, the eego amplifier should be observed
to verify normal operation. If abnormal performance is observed, additional measures may be necessary, such as re-orienting or
relocating the eego amplifier.

b) Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.

Recommended separation distances between portable and mobile RF communications equipment and the eego amplifier

The eego amplifier is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled.
The customer or the user of the eego amplifier can help prevent electromagnetic interference by maintaining a minimum
distance between portable and mobile RF communications equipment (transmitters) and the eego amplifier as
recommended below, according to the maximum output power of the communications equipment.

Rated maximum output power

of transmitter

(W)

Separation distance according to frequency of transmitter (m)

150 kHz to 80 MHz

d = 1.2

80 MHz to 800 MHz

d = 1.2

800 MHz to 2.5 GHz

d = 2.3

0.01

0.2

0.2

0.23

0.1

0.38

0.38

0.73 1 1.2

1.2

2.3

10

3.8

3.8

7.3

100

12

12

23

For transmitters rated at a maximum output power not listed above, the recommended separation distance d in metres (m) can be
estimated using the equation applicable to the frequency of the transmitter, where P is the maximum output power rating of the
transmitter in watts (W) according to the transmitter manufacturer.

NOTE 1 At 80 MHz and 800 MHz, the separation distance for the higher frequency range applies.

NOTE 2 These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection from
structures, objects and people.

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APPENDIX C: EXPLANATION OF SYMBOLS

Manufacturer symbol: indicated with name, address
Serial number

Year of manufacture

Conformité Europeenne, CE mark, with number of Notified Body
involved in the conformity assessment

Follow the instructions for use (i.e., this user manual)
Warning sign: warnings apply

Special waste disposal regulations apply (EU)

Safety according to class II electrical equipment (IEC 60601-1)

Applied parts: type BF (IEC 60601-1)

Applied parts: type CF (IEC 60601-1) (only applicable if on device label)

Rx only

Caution: Federal Law (USA) restricts this device to sale by or on the
order of a physician.

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APPENDIX D: DATASHEET

Manufacturer:

eemagine Medical Imaging Solutions GmbH

Gubener Straße 47

10243 Berlin

Germany

Product Name: eego amplifier

Product Code: EE-211, EE-212, EE-213, EE-214, EE-215 / version 1.2

EE-221, EE-222, EE-223, EE-224, EE-225 / version 1.2

Classification: CE class IIa according to the MDD 93/42/EEC Annex IX

Description: The eego amplifier has been designed as a mobile recording device for high-density

EEG and other electrophysiological signals. It provides access to recorded data over a
USB connection to external software over its signal driver interface. The eego
amplifier comes with a built-in rechargeable battery for recordings of several hours.

The device provides maximum 64 channels of referential EEG and (optionally)
synchronously recorded 24 bipolar input signals.

The eego amplifier is used in combination with the eego recording software.

An SDK is available for direct amplifier communication.

The implemented active shielding technology protects the EEG inputs from grid
interference noise.

Sampling rate and gain can be set through the user interface of the control software.

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Product variants:

Product code

Description

EE-211

eego amplifier, 64ch referential, 2kHz

EE-212

eego amplifier, 32ch referential, 2kHz

EE-213

eego amplifier, 16ch referential, 2kHz

EE-214

eego amplifier, 32ch referential, 24ch bipolar, 2kHz

EE-215

eego amplifier, 64ch referential, 24ch bipolar, 2kHz

EE-221

eego amplifier, 16ch referential, 16kHz

EE-222

eego amplifier, 32ch referential, 16kHz

EE-223

eego amplifier, 32ch referential, 24ch bipolar, 16kHz

EE-224

eego amplifier, 64ch referential, 16kHz

EE-225

eego amplifier, 64ch referential, 24ch bipolar, 16kHz

Specifications:

Dimensions (width * depth * height)

160 * 205 * 22 mm

Weight

<500 g

Resolution and input stage

24 bit, true DC input for all channels, one A/D converter per
channel

Number of referential channels

64 actively shielded inputs. Separate reference and patient ground

Number of bipolar channels (optional)

24

Input noise (referential)

< 1.0 μV

RMS

(lowest sampling rate and signal range)

Input impedance (referential)

>1 GΩ

Input signal range (referential)

150 – 1000 mVPP (programmable gain)

Common-mode rejection ratio
(referential)

>100 dB

Maximum sampling rate
(depends on amplifier type)

16384 Hz (16384/8192/4096/2048/1024/512 and
16000/8000/4000/2000/1000/500 Hz)

Trigger input

8 bit TTL, electrically separated from amplifier

USB output interface

USB, electrically separated from amplifier

Operation time (integrated battery)

up to 5h

Operating temperature

10°C to 40°C

Storage temperature

10°C to 40°C

Transport temperature

-10°C to 50°C

Humidity

30% to 75%

IP class

The enclosure protection class is IP20 according EN60529

Atmospheric pressure

70 kPa to 106 kPa

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OS requirements

MS Windows 7 or 8.1 (32bit, 64bit), 32 bit applications only

Debian 8.x with g++ 4.9 compiler (32bit, 64bit OS and applications)

2GB RAM working memory

USB 2.0 connection for amplifier

Control software must be compatible and designed for eego
amplifier

PC Compliance

IEC 60950

Compliant EMC Directive 2014/30/EU, the Low Voltage Directive
2014/35/EU, the RoHS Directive 2011/65/EU, the Ecodesign
Directive 2009/125/EC, and the Radio Equipment Directive
2014/53/EU where applicable.

Warning:

Proper use of the eego amplifier depends on careful reading of all instructions and labels
that come with or are present on the device. Incorrect use of the device may cause inaccurate
measurements. Non-compliance with warnings and safety regulations may result in severe personal
injury and total loss of equipment.

Disclaimer: We have attempted to write this document as accurately as possible. However, mistakes are bound to occur, and we reserve
the right to make changes to the products, which may render parts of this document invalid. No part of this document may be copied or
reproduced without the explicit permission of the authors.