www.brainproducts.com
Version (Cover) 001 03/2014
© Brain Products GmbH
Operating Instructions
actiCHamp - Product revision 04
actiCHamp Plus - Product revision 01
actiCHamp
actiCHamp Plus
Operating Instructions
actiCHamp | Product revision 04
actiCHamp Plus | Product revision 01
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The reproduction, distribution and utilization of this document as well as the communication of its contents to
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rights reserved in the event of the grant of a patent, utility model or design. Subject to change without notice.
For the latest version of this document, please visit www.brainproducts.com or contact your local distributor.
Published by Brain Products GmbH
Zeppelinstrasse 7
82205 Gilching
Germany
Published on* April 2, 2019 Document version
*Valid until publication of a new version of this document.
© 2019 Brain Products GmbH
Phone: +49 (0) 8105 733 84 - 0
Fax: +49 (0) 8105 733 84 - 505
Web: www.brainproducts.com
009
Contents
About this document...................................................................................................... 4
Product identification information .................................................................................. 8
About actiCHamp and actiCHamp Plus.......................................................................... 10
Safety information ....................................................................................................... 13
Chapter 1 Overview ................................................................................................ 17
1.1 Scope of delivery .................................................................................... 17
1.2 actiCHamp and actiCHamp Plus at a glance ............................................. 21
1.3 32-channel module at a glance................................................................ 22
1.4 actiPOWER at a glance............................................................................. 24
1.5 PowerUnit at a glance.............................................................................. 25
3
Chapter 2 Using actiCHamp and actiCHamp Plus..................................................... 27
2.1 Before use .............................................................................................. 27
2.2 Using actiCHamp or actiCHamp Plus ........................................................ 28
2.3 After use ................................................................................................. 33
Chapter 3 Using the actiCAP electrode cap with actiCHamp and actiCHamp Plus ..... 34
3.1 Prepare actiCAP for acquisition................................................................ 34
3.2 Minimize the impedances ....................................................................... 35
3.3 The role of channel 1 in module 1 ............................................................ 38
Chapter 4 Using the R-Net electrode system with actiCHamp Plus ........................... 39
Chapter 5 Maintenance, cleaning and disposal ....................................................... 40
5.1 Maintenance........................................................................................... 40
5.2 Cleaning ................................................................................................. 40
5.3 Disposal ................................................................................................. 41
Chapter 6 Troubleshooting ..................................................................................... 42
6.1 Troubleshooting for actiCHamp, actiCHamp Plus and Recorder................. 42
6.2 Troubleshooting for actiPOWER/PowerUnit .............................................. 43
6.3 Troubleshooting for the actiCAP electrode set .......................................... 44
6.4 Applying a test signal .............................................................................. 46
6.5 Diagnosing electrodes with impedance mode problems........................... 47
6.6 Replacing a faulty electrode .................................................................... 48
Appendix A Technical data ........................................................................................ 52
Appendix B Active electrodes .................................................................................... 60
About this document 4
About this document
This document describes how to use BrainVision actiCHamp and BrainVision actiCHamp Plus (hereafter referred to as actiCHamp and actiCHamp Plus) and how they are integrated into a measurement setup. This document forms an integral part of the product. It must be precisely adhered to in
order to ensure that the product is used as intended and operated correctly to guarantee the con
comitant safety of test subjects, users and third parties. Keep this document in a safe place and
make sure that it is always available to the users.
No part of this document may be reproduced or distributed in any form without the express written
permission of Brain Products GmbH. The operator may print this document to make it available for
the users of the product.
Make sure that you have the most recent version of this document for your product or product revision. You can find the most recent version on our website: http://www.brainproducts.com.
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Target group of this document
This document is intended for users in the psychological and neurophysiological research area as
well as physicians and medical experts with experience in performing physiological data acquisi
tion. Staff must also know how to work safely and reliably with the permitted amplifier and the associated recording software.
Structure of this document
This document is divided into the following chapters:
Chapter 1 provides an overview of all the system components.
Chapter 2 describes how to operate the amplifier system correctly.
Chapter 3 contains useful information on handling the active electrodes of actiCAP.
Chapter 4 contains information on using R-Net with actiCHamp Plus.
Chapter 5 contains notes on the maintenance and cleaning of the equipment.
Chapter 6 offers assistance with troubleshooting.
In the Appendices you find the technical data, a description of the active shielding mode and the
functional principles of the active electrodes as well as actiCHamp and actiCHamp Plus.
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About this document 5
!
NEW
Conventions in this document
Typographical conventions
Bold indicates items on the user interface (menus, buttons, switches, connectors,
options) and is used for emphases in the text
Italic indicates titles of dialog boxes/tabs, file locations and is used to indicate
product names
Underscore indicates cross-references and web addresses
Monospaced indicates text or characters to be entered at the keyboard
Symbols
Caution: This symbol indicates that incorrect use of the product(s) may result in a
personal injury to the test subject, the user and/or a third-party. Failure to observe
the information in this document constitutes incorrect use.
Notice: This symbol indicates that the incorrect use of the product(s) may bring
about a risk of damage to property. Failure to observe the information in this docu
ment constitutes incorrect use.
Note or Tip: This symbol draws your attention to important information relating to the
current topic and to recommendations on how to use the product(s).
Cross-reference: This symbol indicates a reference to a related chapter, section or
document.
New: This symbol indicates changes or new content at this point.
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About this document 6
Revision history
Page . . . .Status . . . . . Subject
7 new Product designation added for actiCHamp Plus and actiCHamp
9 modified The chapter has been updated with reference to actiCHamp Plus
16 new actiCHamp Plus details added to Scope of delivery
18 new Scope of delivery details added for PowerUnit
19 modified Application Suite USB replaces the previous DVD version
21 new Electrostatic Sensitive Device (ESD) safety information added.
24 new PowerUnit at a glance information added
26 new The chapter has been updated with reference to actiCHamp Plus and PowerUnit
28 modified Note added in regards to using the correct ground electrode with actiCHamp
and actiCHamp Plus.
33 modified Table has been updated to include actiCAP slim electrodes
34 modified Image has been updated to include actiCAP slim electrode
35 modified Images of actiCAP electrodes replaced with actiCAP slim electrodes.
38 new New chapter added with information for R-Net
41 new Troubleshooting has been revised and updated.
47 new Section has been updated with reference to the new slim splitter box (5 screws)
53 new Technical data added for actiCHamp Plus
57 new Technical data added for PowerUnit
60 modified Paragraph updated and glossary entires added for Referential and Reference-
free
61 modified Update to figure and figure title
Reporting errors and support
If you use actiCHamp in combination with the PyCorder recording program, you can register on the
dedicated forum, where you can discuss issues with other users and read the help topics. You find
the forum at
http://www.actichamp.com/forum/.
We would ask you to report without delay any error you find in this document, any fault on the products or any malfunction that you observe when using this product. To do so, please contact your local dealer, who will also assist you in general questions about the product.
About this document 7
Product identification information 8
NEW
Product identification information
Product designation: BrainVision actiCHamp Plus
BrainVision actiCHamp Plus 32 System BP-100-2500
BrainVision actiCHamp Plus 64 System BP-100-2510
BrainVision actiCHamp Plus 96 System BP-100-2520
BrainVision actiCHamp Plus 128 System BP-100-2530
BrainVision actiCHamp Plus 160 System BP-100-2540
BrainVision actiCHamp
BrainVision actiCHamp 32 System BP-100-2107
BrainVision actiCHamp 64 System BP-100-2115
BrainVision actiCHamp 96 System BP-100-2125
BrainVision actiCHamp 128 System BP-100-2135
BrainVision actiCHamp 160 System BP-100-2145
Manufacturer: Brain Products GmbH
Zeppelinstraße 7
D-82205 Gilching (Munich)
Phone: +49 8105 73384 - 0
Fax: +49 8105 73384 - 505
Web site: https://www.brainproducts.com
Email: techsup@brainproducts.com
CE marking The Brain Products GmbH confirms the electromagnetic
compatibility (EMC) of this product according to the Direc
tive 2014/30/EU of the European Parliament and of the
Council of 26 February 2014 on the harmonisation of the
laws of the Member States relating to electromagnetic
compatibility.
Warranty http://www.brainproducts.com/contact.php
Identify the product revision
The product revision is stated on the label at the bottom of actiCHamp and actiCHamp
Plus by the indication ‘Prod.-Rev.’
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Product identification information 9
Explanation of the markings on the products
Observe the manual.
MR Unsafe: An item which poses unacceptable risks to the patient, test
subject, medical staff or other persons within the MR environment.
This symbol indicates that defective products must not be disposed of
with household waste. Dispose of in accordance with national regula
tions or return the products and its accessories to the manufacturer.
The Brain Products GmbH confirms the electromagnetic compatibility
(EMC) of this product according to the Directive 2014/30/EU of the Euro
pean Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic
compatibility.
-
-
This symbol confirms compliance with the environmental requirements
for electronic products (only applies to China).
About actiCHamp and actiCHamp Plus 10
NEW
About actiCHamp and actiCHamp Plus
What is actiCHamp and actiCHamp Plus?
actiCHamp is a modular, extensible amplifier system for the digitization of up to 160 EEG channels.
It possesses eight auxiliary inputs for recording signals via sensors, for example GSR, breathing or
pulse. actiCHamp is used in combination with actiCAP active electrodes.
The signals acquired via the electrodes and sensors are amplified, digitized and then transferred to
a computer via USB for display and storage. Users can easily add up to five plug-and-play modules
each with 32 channels to the actiCHamp base module.
actiCHamp can be used together with BrainVision Recorder or BrainVision PyCorder to record EEG
and ExG signals.
actiCHamp Plus can be used with BrainVision Recorder to record EEG and EXG signals. It is an improved version of the actiCHamp in that it can be used with both actiCAP active electrodes as well
as with passive electrode systems (e.g. R-Net, BrainCap). The actiCHamp Plus also supports addi
tional trigger and Sync Out options.
Intended use
actiCHamp and actiCHamp Plus are intended to be used for amplifying and digitizing electrophysiological signals (e.g. EEG, EMG, ECG, EOG).
actiCHamp and actiCHamp Plus are not medical devices. They may be used in the context of nonmedical applications in order to carry out fundamental or applied research on the basis of neuro
physiological methodology and data.
Use of actiCHamp or actiCHamp Plus for diagnosis, therapy, monitoring of vital physiological processes (such as cardiovascular functions etc.) or other medical purposes is expressly forbidden.
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Correct use
actiCHamp and actiCHamp Plus are permitted to be used by users in the psychological and neurophysiological research area as well as physicians and medical experts.
About actiCHamp and actiCHamp Plus 11
They must not be used by unqualified persons (e.g. laymen), and persons who cannot read (e.g. due
to visual impairment) or understand (e.g. due to a lack of language skills) the operating instruc
tions.
actiCHamp and actiCHamp Plus can be used to record neuro-/electrophysiological signals from
healthy or sick adults, children and animals.
Provided that all stipulations regarding the correct use are met and that the product is used in accordance with its intended use, the use of actiCHamp and actiCHamp Plus is permitted in the following environments:
research institutes and other non-medical environments (e.g. at home),
hospitals, clinics and other medical environments.
actiCHamp or actiCHamp Plus must not be used in the following environments:
MR scanner environment,
vicinity of explosive gases as may be the case in operating theaters, for example,
oxygen enriched atmospheres,
underwater (e.g. sea, swimming pool, bath tub) or in environments in which significant amounts
of water could enter components of the actiCHamp or actiCHamp Plus (e.g. under shower, under
water-tap).
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The user is solely liable for any risks to test subjects associated with the investigation if the product
is not used in accordance with the correct use.
Combination with other products
actiCHamp and actiCHamp Plus are permitted to be combined with the following products:
Category Product name actiCHamp actiCHamp
Plus
Caps actiCAP
actiCAP slim/actiCAP snap
actiCAP Xpress
actiCAP Xpress Twist
R-Net
BrainCap
Software Recorder
● ●
● ●
● ●
● ●
●
●
● ●
BrainVision PyCorder
●
About actiCHamp and actiCHamp Plus 12
Category Product name actiCHamp actiCHamp
Plus
Hardware TriggerBox & TriggerBox Extension
EP-PreAmp
BIP2AUX
StimTrak
Sensors Respiration Belt
GSR Module
3D Acceleration Sensor
Photo Sensor
Temperature Sensor
Blood Pressure Sensor
Computer The computer connected to the amplifier should at a minimum fulfill the
IEC/EN 62368-1 or IEC/EN 60950-1 safety standard.
● ●
● ●
● ●
● ●
● ●
● ●
● ●
● ●
● ●
● ●
Safety information 13
Safety information
Please read the following safety information carefully since it helps to prevent personal injury and
damage to property. It is assumed that you have the required specialist knowledge in handling the
product and accessories.
Brain Products will not accept any liability for loss or damage resulting from a failure to follow these
operating instructions and, in particular, the safety instructions.
General precautions
Handle the product and its accessories with care!
Do not drop the product or allow it to fall and avoid impacts.
Do not unplug connectors by pulling on their cable. Instead unplug a connector by releasing the
hooks (if applicable) and pulling on the connector itself.
Do not crush or kink the cables.
Use actiCHamp and actiCHamp Plus only in the environments for which they has been designed.
In particular, actiCHamp and actiCHamp Plus must not be used in the following environments:
MR scanner environment,
vicinity of explosive gases as may be the case in operating theaters, for example,
oxygen enriched atmospheres,
underwater or in environments in which significant amounts of water could enter compo-
nents of the actiCHamp or actiCHamp Plus.
Heat, direct sunlight (UV radiation), moisture, dust, liquids, conductive foreign matter and ex-
cessive radiation can shorten the lifetime of the product.
Safety information 14
!
actiCHamp and actiCHamp Plus
The simultaneous use of a defibrillator while the amplifier and its accessories are applied or are in
operation is prohibited.
CAUTION
Risk of electric shock when using AUX inputs
The AUX inputs are not galvanically isolated from each other.
An incorrect combination of equipment connected to the AUX inputs may result in the
test subject receiving an electric current that exceeds the patient auxiliary or leakage
current according to EN 60601-1.
If you connect equipment that is galvanically connected to the test subject to an AUX
input of the amplifier, do not connect equipment that can inject dangerous electric
currents (EN 60601-1, 3rd edition) to the other AUX inputs of the amplifier.
NOTICE
Damage to actiCHamp or actiCHamp Plus
Before you connect equipment to the trigger output of actiCHamp or actiCHamp Plus,
make sure that:
the amplifier is connected to the computer;
the amplifier is connected to the power supply;
the recording program has been started.
This is the only way of preventing unwanted pulses of the trigger output from damaging your hardware.
For information on ambient conditions, please refer to Appendix A.
Safety information 15
!
40 °C
0 °C
actiPOWER/PowerUnit
Recharge actiPOWER/PowerUnit once per month! This prevents the deterioration of the re-
chargeable battery.
It typically takes approximately 10 hours to charge an empty battery at room temperature. Re-
chargeable batteries are subject to gradual wear, resulting in longer charging times.
Connect the charger to actiPOWER/PowerUnit first and then to the mains.
CAUTION
To avoid injury or burns, never allow metal objects to touch the battery contacts
and never short-circuit the battery contacts.
To avoid damage to equipment or people only use original chargers and accesso-
ries from Brain Products.
NOTICE
After use IMMEDIATELY DISCONNECT actiPOWER/PowerUnit from the actiCHamp
or actiCHamp Plus and RECHARGE it. Otherwise you risk deep discharging the bat
teries, which leads to a permanent damage of the battery.
Do not expose actiPOWER/PowerUnit to temperatures below
0 °C or above 40 °C or to direct sunlight. If actiPOWER/
PowerUnit is exposed to temperatures above 40
cool down slowly to its normal operating temperature. At tem
°C, allow it to
peratures below 0 °C, the electrolyte freezes, which destroys
the battery.
actiPOWER/PowerUnit and the charger heat up during charging. Always make sure
that as much free space as possible is available around both components so that
the heat can dissipate freely.
To prevent overheating do not stack several actiPOWERs/PowerUnits on top of
one another if you are charging them at the same time.
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Safety information 16
!
actiCAP electrodes and splitter box
Never plug the actiCAP electrode branches or the splitter box into equipment for which they were
not intended.
NOTICE
Splitter box
Do not open the splitter box by force.
Never disconnect the splitter box from the amplifier by pulling on the flat-ribbon
cable. Instead, open the clamps and pull the plug from the socket.
Do not allow the splitter box and plug to come into contact with liquids or water.
Electrodes
Never remove the electrodes from their holders by pulling on their cables. This re-
sults in cable breaks. Instead, remove the electrodes from their holders by holding the electrode housing.
Never allow the electrodes to come into contact with metal. Metal causes a chem-
ical reaction, through which the Ag/AgCl pellets of the electrodes to break.
You will find further information on how to clean the electrodes in accordance with requirements in Section 5.2.2.
Chapter 1 Overview
NEW
1.1 Scope of delivery
The components listed below are included in the scope of delivery.
Upon receipt of the delivery make sure, that the product or package does not show any signs of
damage, or that the delivery is incomplete.
17
actiCHamp Plus
actiCHamp Plus base module
BP-200-1520
actiCHamp Plus 32-channel module
(installed upon delivery)
BP-200-1530
USB cable (A/B)
BP-09140
Trigger cable 3m (9/25 pin)
BP-245-1550
actiCHamp
Chapter 1 Overview 18
actiCHamp base module
BP-09100
actiCHamp Plus 32-channel module
(installed upon delivery)
BP-09110
USB cable (A/B)
BP-09140
Trigger in cable (9/25 pin)
BP-01975
actiPOWER (recommended for use with actiCHamp)
NEW
Chapter 1 Overview 19
actiPOWER
BP-203-0001
actiPOWER charger (including manual)
BP-203-0002
actiPOWER cable
BP-203-0003
Power cord (country specific)
BP-308-0002
PowerUnit (recommended for use with actiCHamp Plus)
PowerUnit
BP-215-2010
PowerUnit charger (including manual and country
specific adapters)
BP-215-1020
PowerUnit cable
BP-215-2015
Software and starter kit
Chapter 1 Overview 20
Application Suite USB
BP-270-6010
Dongle Starter kit (actiCHamp only)
BP-09150
Pre-filled syringes with electrode gel
Blunt needles
Self-adhesive rings
Measuring tape
1.2 actiCHamp and actiCHamp Plus at a glance
Chapter 1 Overview 21
No. Description
1 Base module
2 AUX inputs
3 MY-Button (Soft key that is set in the recording software. For details please refer to the
user manual of Recorder or PyCorder.)
4 GND socket (for the ground electrode)
5 Trigger Out (TTL signals)
6 USB connector (type B)
7 Mode LED (blinks green when base module is connected to a computer)
8 Trigger In (TTL signals)
9 Ext. Sync LED (indicates external synchronization)
10 Sync. In/Out stereo jack (outputs the synchronization signal)
11 Power supply socket (4 pin, for use with actiPOWER/PowerUnit only)
Chapter 1 Overview 22
NEW
Notes on the AUX channels
The base module has eight AUX sockets (AUX 1 to AUX 8) for sensors to record additional peripheral signals (for example acceleration sensor, respiration belt). They are
galvanically isolated from the EEG electrodes.
The resolution of the AUX channels is different from that of the EEG channels. If, for
example, you want to connect passive electrodes at the AUX inputs, you must use an
additional pre-amplifier module to adapt the input voltage of the EEG channels to the
input voltage required for the AUX inputs. A corresponding BIP2AUX pre-amplifier is
available from Brain Products (ordering code BP-MCS-01).
1.3 32-channel module at a glance
Installing a 32-channel module
If you have an additional 32-channel module, install it before using actiCHamp or actiCHamp Plus.
Electrostatic Sensitive Device (ESD)
Keep the 32-channel module in the anti-static bag until you are ready to install.
While the device is still in its anti-static bag, touch it to an unpainted metal sur-
face for at least 2 seconds. This drains static electricity from the package and from
your body. Alternatively, wear a protective device such as an anti-static wrist
strap.
Handle the 32-channel module carefully, holding it by its edges.
Do not touch solder joints, pins, or exposed printed circuitry.
Do the following:
a Remove the two screws of the blind cover and then remove the blind cover.
b Carefully slide in the 32-channel module. Be sure to have it aligned correctly.
c Insert the two screws into the 32-channel module and tighten them.
Figure 1-1. Installing a 32-channel module
Note
Chapter 1 Overview 23
The 32-channel modules must be positioned correctly and in the correct sequence:
The slot closest to the front panel is intended for the channels 1 to 32. The subsequent slot for the second module (channels 33 to 64), etcetera.
If you do not observe the correct sequence, the 32-channel modules are not recognized.
32-channel module in operation
The status of a 32-channel module is indicated by the Mode LED located on each module. The LED
illuminates:
green on correctly functioning modules
short red flash when a charged battery is connected
red at start-up or if an internal error has occurred. In this case, check the communication path
between the recording program and the amplifier (USB cable) as well as the supply voltage to
the amplifier
solid red indicates a malfunction (refer to Chapter 5).
Figure 1-2. Status indicator of a 32-channel module
1.4 actiPOWER at a glance
No. Description
1 Power socket (2 pin)
2 LED solid (green) = fully charged
LED solid (amber) = charging
3 Power cord (supplied, with country-specific jack)
Chapter 1 Overview 24
The power plug on actiPOWER is used to charge actiPOWER, and to supply actiCHamp.
1.5 PowerUnit at a glance
NEW
No. Description
1 Power socket (2 pin)
2 LED solid (yellow) = Standby
LED slow flashing (yellow) = Pre-charge
LED fast flashing (green) = Rapid Charge
LED slow flashing (green) = Maintain
LED solid (green) = Ready
LED fast flashing (yellow) = Error
LED alternate flashing (yellow and green) = outside valid temperature (wait)
Chapter 1 Overview 25
The power plug on PowerUnit is used to charge PowerUnit, and to supply actiCHamp Plus with power.
Note
When PowerUnit is completely charged (solid green LED) and the charger is dis-
connected and then reconnected PowerUnit will enter a balancing charge mode
where the LED will flash green for an extended period of time. This is expected be
havior and the PowerUnit can still be used without having to wait for a solid green
LED.
Occasionally you may hear a high-pitched whine which changes in frequency
coming from the power supply, this is expected and normal behavior.
Correct handling of actiPOWER/PowerUnit
Take note of the following to avoid damages to the battery:
1 Immediately upon receipt of shipment, charge actiPOWER/PowerUnit.
Chapter 1 Overview 26
!
2 When not in use, leave actiPOWER/PowerUnit connected to the charger (the LED will
display solid green).
actiPOWER/PowerUnit loses its charge when it is disconnected from the charger or
the mains power supply fails. A deep discharge permanently damages the recharge
able battery. ALWAYS recharge actiPOWER/PowerUnit immediately AFTER USE.
3 Under all circumstances, recharge actiPOWER/PowerUnit once per month! This pre-
vents the deterioration of the rechargeable battery.
Notes
Charge actiPOWER/PowerUnit ideally at room temperature. It typically takes approximately 10 hours to charge an empty battery at room temperature.
Rechargeable batteries are subject to gradual wear, resulting in longer charging
times.
-
Notice
After use IMMEDIATELY DISCONNECT actiPOWER/PowerUnit from actiCHamp or ac-
tiCHamp Plus and RECHARGE it.
Connect the charger first to actiPOWER/PowerUnit and then to the mains.
actiPOWER/PowerUnit and the charger heat up during charging. Always make
sure that as much free space as possible is available around both components so
that the heat can dissipate freely.
Do not stack several actiPOWERs/PowerUnits on top of one another if you are
charging them at the same time.
27
NEW
Chapter 2 Using actiCHamp and actiCHamp Plus
2.1 Before use
1 Charge actiPOWER/PowerUnit
Each time before use you must fully charge actiPOWER/PowerUnit.
Do the following:
Connect the charger to the mains and then to actiPOWER/PowerUnit.
The LED on the charger illuminates:
Refer to Section 1.4 for information on the actiPOWER LED status
Refer to Section 1.5 for information on the PowerUnit LED status.
Note
Leave the charger connected to actiPOWER/PowerUnit, if not in use. The charger retains the charge of the battery.
2 Install the recording software (before the first use)
The installation of the recording software (Recorder or PyCorder) includes the drivers for acti-
CHamp and actiCHamp Plus. For details on this subject, please refer to the user manual of your
recording software.
Note
BrainVision Recorder (version 1.21.0202 or later) is required for actiCHamp.
BrainVision Recorder (version 1.22.0001 or later) is required for actiCHamp Plus.
BrainVision PyCorder (version 1.0.9 of later) is required for actiCHamp.
Chapter 2 Using actiCHamp and actiCHamp Plus 28
2.2 Using actiCHamp or actiCHamp Plus
1 Set up the power supply
First unplug the charger form the mains and then from actiPOWER/PowerUnit.
Place actiCHamp or actiCHamp Plus on top of the actiPOWER/PowerUnit.
Connect actiPOWER/PowerUnit to actiCHamp or actiCHamp Plus by using the supplied power
cable.
Note on use of actiPOWER and PowerUnit
We recommend that actiPOWER is used with actiCHamp and that PowerUnit is used
with actiCHamp Plus.
2 Connect to a computer
The computer connected to the amplifier should at a minimum fulfill the IEC/EN
62368-1 or IEC/EN 60950-1 safety standard.
Connect actiCHamp or actiCHamp Plus to the computer with the supplied USB cable.
Only use the cables supplied with the actiCHamp and actiCHamp Plus.
The Mode LED blinks, when the connection is established.
Figure 2-1. Setting up the power supply and connecting to a computer
3 Installing the drivers
Chapter 2 Using actiCHamp and actiCHamp Plus 29
NEW
The first time you connect actiCHamp or actiCHamp Plus to your computer, Windows® initializes
the drivers on the corresponding USB port.
4 Connect the ground electrode
Connect the corresponding ground electrode to the GND socket at the front of the amplifier.
Note on use of the ground electrode
actiCHamp Plus you must use BP-235-2111.
actiCHamp you can use either BP-235-2110 (recommended) or BP-235-2111.
5 Connect the electrode cap
The flat-ribbon cable of the electrode cap is connected to the sockets on top of the amplifier. The
plug on the flat-ribbon cable and sockets on the amplifier have an arrow. Align the arrows when
connecting the splitter box. For more details on the electrode cap, please refer to
Chapter 3.
Figure 2-2. Correctly align the flat-ribbon cable
Figure 2-3. Connecting the ground electrode and electrode cap
The electrode cap connector boxes must be connected in the correct sequence: The front-most
slot in the base module is intended for the first 32-channel module (channels 1 to 32); the sub
sequent slot for the second (channels 33 to 64), etc.
-
Chapter 2 Using actiCHamp and actiCHamp Plus 30
Figure 2-4. Correct sequence when connecting the electrode cap connector boxes
Chapter 2 Using actiCHamp and actiCHamp Plus 31
!
Connecting the trigger lines (optional)
Trigger In
In the scope of delivery there is a trigger cable with a 9- and 26-pin connector. Connect this cable
to the Trigger In port of the amplifier and the LTP port of your computer, simulation computer or
TriggerBox.
Trigger Out
The trigger output is used to control external equipment. For the specifications of the trigger
pulse, please refer to
Appendix A.
Figure 2-5. Connecting the trigger lines
Notice
Before you connect an equipment to the trigger output of actiCHamp or actiCHamp
Plus, make sure that:
the amplifier is connected to the computer;
the amplifier is connected to the power supply;
the recording program has been started.
This is the only way of preventing unwanted pulses of the trigger output from damaging your hardware.
Chapter 2 Using actiCHamp and actiCHamp Plus 32
Using the synchronization output (optional)
The signal on the synchronization output is a TTL signal that corresponds to one of the three basic
sampling rates of actiCHamp or actiCHamp Plus. The table below maps the basic sampling rates of
actiCHamp and actiCHamp Plus to the selectable sampling rates in Recorder.
Sampling rate selected in Recorder Output signal on Sync Out.
≤ 10 kHz 10 kHz
25 kHz to 50 kHz 50 kHz
100 kHz 100 kHz
The synchronization signal allows you to synchronize an external equipment, for example tDC/tAC
stimulators, with actiCHamp or actiCHamp Plus. You can use it to start the stimulation precisely with
a sample and to subtract the stimulation artifact optimally in the data analysis.
When using the actiCHamp Plus the synchronization signal can be used to re-synchronize two different types of data streams off-line. A sync frequency of 0.1Hz, 1Hz, 5Hz, 10Hz or 25Hz can be selected.
The output is designed as 3.5-mm stereo jack. For more details, please refer to Appendix A.
Figure 2-6. Connecting to the synchronization output
Note on the Sync In/Out jack
The synchronization input is not yet implemented.
Chapter 2 Using actiCHamp and actiCHamp Plus 33
Using the recording software
When you have completed the installation of the hardware components and the drivers, you can
start to view and/or record data.
actiCHamp and actiCHamp Plus have four operating modes:
monitoring
test
impedance measurement
recording.
Switching between the modes is performed via the recording software. For more detailed information on this subject, please refer to the user manual of your recording software.
Note
BrainVision Recorder (version 1.21.0202 or later) is required for actiCHamp.
BrainVision Recorder (version 1.22.0001 or later) is required for actiCHamp Plus.
2.3 After use
After use IMMEDIATELY DISCONNECT actiPOWER/PowerUnit from actiCHamp and actiCHamp Plus and RECHARGE it. Otherwise you risk deep discharging the batteries,
which leads to a permanent damage of the battery.
Remember to connect the charger first to actiPOWER/PowerUnit, before you connect
it to the mains.
Chapter 3 Using the actiCAP electrode cap with
NEW
actiCHamp and actiCHamp Plus
3.1 Prepare actiCAP for acquisition
1 Insert the electrodes into the cap
Insert the electrodes in the holders of the actiCAP electrode cap. Each electrode set consists of
32 numbered electrodes (1 to 32). The cap has colored holders for each branch, that are labeled
from 1 to 32. The colors and numbers help you insert the electrodes into the holders quickly.
34
actiCAP actiCAP
slim
Example: The first branch corresponds to the color green. Consequently, you must insert the
electrode numbered 1 in the green actiCAP holder which is also numbered 1. The second branch
is yellow, i.e. you insert the first electrode of the second branch into the yellow actiCAP holder
which is numbered 1.
2 Place the EOG, EMG or ECG electrode (optional)
Color Channel
green 1-32
yellow 33-64
red 65-96
white 97-128
light blue 129-160
black ground electrode
dark blue reference electrode
Chapter 3 Using the actiCAP electrode cap with actiCHamp and actiCHamp Plus 35
NEW
You can also use the electrodes to acquire EOGs, EMGs or ECGs. When doing so, use the supplied actiCAP holders:
Figure 3-1. Applying EOG, EMG or ECG electrode
a actiCAP - insert the electrode in the holder and apply adhesive ring.
b actiCAP slim - apply adhesive ring.
c Apply the electrode to the required part of the body.
3 Start the recording software
In the recording software, assign the physical channels to the electrode positions (e.g. Fp1). The
first electrode of the first branch has the physical channel 1 and the first electrode of the second
branch has the physical channel 33, for instance.
Note
Take note of channel 1 in module 1 (Section 3.3).
3.2 Minimize the impedances
Do the following to minimize the impedances:
1 Switch actiCHamp or actiCHamp Plus to impedance mode. The LEDs in the electrodes illuminate
red.
2 First minimize the impedance of the ground electrode and electrode 1 in module one (physical
channel 1). Only then minimize the impedances of the EEG electrodes (see also
Section 3.3).
Chapter 3 Using the actiCAP electrode cap with actiCHamp and actiCHamp Plus 36
NEW
Carefully push the blunt needle through the electrode aperture as far as the subject's scalp
Figure ).
(see
Gently roughen the subject's scalp by circular movements of the needle. This increases the
contact area between the electrode gel and the scalp.
Use the nozzle to apply a small amount of gel (0.2 to 0.3 ml) directly to the scalp.
Fill the remaining space in the electrode with gel.
In this way, you can easily achieve an impedance of 25 to 35 kOhm at the ground electrode that
is required in order to measure the impedances of all other electrodes.
When the impedance value changes, the electrode LEDs change from red to yellow or green depending on the ranges you have set.
Color Default impedance thresholds
red greater than 60 kOhm
amber between 25 and 60 kOhm
green less than 25 kOhm
The impedances improve with time: First of all, fill all the electrodes with gel as described above.
Once you have prepared all the electrodes accordingly, perform a visual check of the impedanc
es.
If the impedance in one or more electrodes has not been sufficiently minimized (LED lit yellow
or red), use the blunt needle in the nozzle to push through the electrode aperture again and
roughen the test subject's scalp a little more by means of circular movements. If necessary, use
a little more gel.
-
Chapter 3 Using the actiCAP electrode cap with actiCHamp and actiCHamp Plus 37
Figure 3-2. Filling the electrodes with gel
Using this procedure and with a little practice, two people should be able to prepare 32 channels
in four to five minutes or 64 channels in approximately eight minutes.
Chapter 3 Using the actiCAP electrode cap with actiCHamp and actiCHamp Plus 38
3.3 The role of channel 1 in module 1
The channel 1 in module 1 has two important functions:
1 Impedance measurement
During the impedance measurement, the impedance of the ground electrode is determined with
the help of channel 1 in module 1. In order to measure the impedances correctly, channel 1 in
module 1 must be present.
2 Active shielding mode (page 61)
The active shielding mode uses channel 1 in module 1 as a signal source for determining the environmental noise. Therefore, the channel 1 electrode should be placed in an area with low physiological activity. This will avoid EEG/EMG artifacts in all electrodes due to overcompensation of
the artifact.
Chapter 4 Using the R-Net electrode system
NEW
with actiCHamp Plus
The R-Net electrode system consists of sponges and passive Ag/AgCl electrodes that are held in
place with a durable and flexible net. Due to the gel-free application it allows for rapid preparation
and high recording flexibility, which is advantageous e.g. in time-restricted EEG recording situa
tions. The R-Net electrode system is available in 32, 64, 96 and 128 channel configurations and in
adult sizes ranging from (head circumference) 48cm to 62cm.
For details of use, refer to the Operating Instructions of the R-Net electrode system.
39
-
Figure 4-1. Preparing the R-Net electrode system for use
For additional information on the R-Net electrode system refer to the Brain Products website, https:/
/www.brainproducts.com/productdetails.php?id=70.
Chapter 5 Maintenance, cleaning and disposal
!
5.1 Maintenance
In principle, the amplifier is maintenance-free. It is recommended to apply the test signal at regular
intervals (for example, once per month) in order to ensure that the amplifier is functioning correctly.
For details on this subject, please refer to
Repairs or repeat testing as laid down in VDE 0751-1/IEC 62353 may only be carried out by Brain
Products.
Section 6.4.
40
If any pins or connections on the products are dirty or the products show damages, return them to
Brain Products.
5.2 Cleaning
5.2.1 actiCHamp, actiCHamp Plus and actiPOWER/PowerUnit
Use a soft, slightly moist cloth to clean the housing of actiCHamp, actiCHamp Plus and actiPOWER/
PowerUnit.
For disinfecting the surfaces of the products, we recommend to use a cleaning agent based on propylalcohol, for example a solution containing 25 % Ethanol and 35 % Propan-1-ol. Adhere to the
safety precautions of the manufacturer of the cleaning agent.
Notice
Never clean the products under running water.
Never use aggressive or corrosive cleaning agents.
Never clean the products when the test subject is connected to them or when they
are connected to the power supply.
Chapter 5 Maintenance, cleaning and disposal 41
5.2.2 Electrode caps
Refer to the manual supplied with your electrode cap or electrodes for specific cleaning information.
Notes
For actiCAP: Do not allow the splitter box and plug to come into
contact with liquids or water.
Do not leave the electrodes and electrode cap to soak for extend-
ed periods.
Do not use alcohol to clean the electrodes and electrode cap.
Do not store the electrodes in a disinfectant.
Do not chlorinate the electrodes as this may result in corrosion.
Do not use any hot sterilization methods (e.g. autoclave) since this may damage
the cable insulation.
The plug on the electrode connector box must be clean. You can clean it with com-
pressed air if necessary.
5.3 Disposal
As soon as the amplifier, accessories and cables have reached the end of their service life, dispose
of them in accordance with the relevant national regulations. In Germany, for example, the legisla
tion governing electrical and electronic equipment (known as the ElektroG) is applicable. In the EU
and EFTA, the WEEE Directive 2012/96/EC on Waste Electrical and Electronic Equipment applies.
Do not dispose of your products, accessories and cables with ordinary household waste.
Subject to the proviso that only original equipment supplied by Brain Products is involved, Brain
Products accepts return of the equipment and handle disposal on request.
Power Unit is classified as a UN3480 (PowerUnit as single product) and a UN3481 (when PowerUnit
shipped with amplifier) product. For transportation, PowerUnit fulfills requirements of UN-test 38.3
according to the UN Manual of Tests and Criteria.
PowerUnit falls under the transportation regulations of dangerous goods. It may only be shipped by
a qualified person or service partner depending on local regulations. In case of critical damage,
PowerUnit must not be shipped, but disposed at a local point for disposal.
If you have any questions, please contact your local distributor.
-
Chapter 6 Troubleshooting
NEW
This chapter contains test scenarios and recommendations that assist you when conducting tests
and localizing faults.
6.1 Troubleshooting for actiCHamp, actiCHamp Plus and Recorder
42
Errors that occur when actiCHamp or actiCHamp Plus are connected and Recorder is running are displayed in the Recorder interface. These type of errors can indicate an issue with the hardware being
used, for example, the actiCHamp or actiCHamp Plus, USB cables, USB ports or the PC and operat
ing system.
Use the following as a checklist if you are experiencing any issues:
Is the green LED on the rear of the actiCHamp or actiCHamp Plus blinking after it is connected to
the PC? (actiPOWER/PowerUnit does not have to be connected).
Is the actiCHamp or actiCHamp Plus visible in the Windows device manager? (actiPOWER/
PowerUnit does not have to be connected).
Connect the actiCHamp or actiCHamp Plus to a different USB port on the PC or try using an alter-
native PC to ensure any problems aren’t PC dependent.
Remove any USB extensions or hubs and swap USB cables to see if the problems persist.
Is the actiPOWER/PowerUnit fully charged? Always make sure the battery is completely charged.
Does Recorder recognize the actiCHamp or actiCHamp Plus and channel modules? (actiPOWER/
PowerUnit has to be charged and connected). Within Recorder select Amplifier > Connected Am
plifier.
Are the green LEDs lit on the channel modules during impedance and monitoring mode?
-
-
Chapter 6 Troubleshooting 43
6.2 Troubleshooting for actiPOWER/PowerUnit
As with any rechargeable battery, over time the charge capacity will naturally reduce. However, if the
usable capacity suddenly drops this is often the result of inadequate battery management caused
by incomplete charging and discharging cycles.
Symptom Possible cause Possible solution
Recording has been terminated by low voltage.
Charger LED no longer lights
up.
LED on the channel module/s
does not flash red after the
actiPOWER/PowerUnit has
been connected.
actiPOWER/PowerUnit has not
been completely charged.
Battery has reached the end of
its serviceable life.
Fuse or internal circuitry
defect.
Battery has been deeply discharged.
1 Completely charge actiP-
OWER/PowerUnit for at
least ten hours.
2 Connect actiPOWER/
PowerUnit to the amplifier.
3 Time the amplifier operat-
ing duration on monitoring
mode with a 32 channel
electrode set and 1 kHz
sampling rate.
An operating time of 6 h (actiPOWER) or 10 h (PowerUnit) can
be expected in monitoring
mode
Contact your certified distributor.
Contact your certified distributor.
1 Completely charge actiP-
OWER/PowerUnit for at
least ten hours.
2 Connect actiPOWER/
PowerUnit to the amplifier.
3 Time the amplifier operat-
ing duration on monitoring
mode with a 32 channel
electrode set and 1 kHz
sampling rate.
An operating time of 6 h (actiPOWER) or 10 h (PowerUnit) can
be expected in monitoring
mode.
Fuse or internal circuitry
defect.
Contact your certified distributor.
Chapter 6 Troubleshooting 44
6.3 Troubleshooting for the actiCAP electrode set
The electrode sets that attach to the channel modules of actiCHamp or actiCHamp Plus consist of
electrode sets with ribbon cables, splitter boxes and lead wires with electrodes. Problems can man
ifest either during impedance measurement (LED non-reacting to impedance minimization, implausible or instable impedance measurements) or during monitoring or recording. The latter impresses
either as flat line or artificial wave forms.
In contrast to traditional passive electrodes high impedance readings are not necessarily associated with bad signals and bad signals are not necessarily caused by high impedance electrodes. Impedance as well as signal issues can occur simultaneously or independently. Loose connections in
lead wires as well as corroded contacts in splitter boxes cause often only intermittent problems,
they are not always reproducible and hard to exclude definitively.
-
Chapter 6 Troubleshooting 45
Symptoms observed during impedance or monitoring mode while preparing:
Impedance mode
Symptom Possible cause Possible solution/Test
No impedance decrease
despite proper electrode
preparation with SuperVisc
LED does not light up Electrode, cable or splitter box
All LEDs are red GND missing or defective Replace the ground electrode
Impedance measurement
unstable, LEDs are flashing
Dried gel residuals on the electrode
Ground and Ch1 electrodes
are not prepared properly
damaged
Too low or narrow impedance
thresholds
Clean the dirty electrode (see
Section 5.2.2)
Prepare GND and Ch1 electrodes first.
Perform a saline test (see
Section 6.3.1)
(see Section 6.6)
Use the factory default settings:
red > 60 kOhm
amber > 25 & 60 kOhm
green > 25 kOhm
Monitoring/Recording mode
Symptom Possible cause Possible solution
Flat line, no physiologic signal
on one or more channels
Artificial wave forms on one or
more channels
Electrode, cable, splitter box
or ribbon cable damaged
Perform a saline test (see
Section 6.3.1) and replace the
faulty electrode (see
Section 6.6) for anything else
contact your certified distributor.
6.3.1 Saline test
Saline tests are a simple and often indispensable method to track both impedance mode problems
as well as signal measurement problems. The saline serves as low impedance reference state to test
impedance mode or inject a test signal in all channels simultaneously.
To perform a saline test do the following:
Chapter 6 Troubleshooting 46
1 Mix approximately three tablespoons of salt with one liter of water in a plastic bowl.
Do not use a metal bowl or sink as this will damage the electrodes.
2 Place all electrodes including the ground electrode in the saline bath.
6.4 Applying a test signal
You can use the amplifier internal test signal generator to check the integrity of the signal pipeline
1 Place the electrodes in a saline bath (see Section 6.3.1).
2 Deactivate all software filters in your recording program.
3 Set the sampling rate to 500Hz.
4 Switch your recording program to test mode by pressing the signal test button.
5 Wait until the saline solution has stopped moving and signals are stable in monitoring mode.
6 Record 30 sec, zip .eeg, .vhdr, .vmrk and send it to techsup@brainproducts.com.
If all channels are working properly a square-wave signal (Figure 6-1) is output. If this is not the case
the corresponding electrode is faulty.
Chapter 6 Troubleshooting 47
Figure 6-1. Square-wave signal in Recorder
Test signal details:
Symptom Possible cause Possible solution
Square-wave signal on all
channels
No signal on one or more electrodes
No signal on all electrodes GND electrode defective Replace the GND electrode
In case the problem which was seen during recording or the impedance check is not reproducible in
the saline solution move the electrode cable in question to determine if there is a loose contact is
sue.
Expected function None
Electrode (pin worn, broken or
corroded) or electrode cable
broken.
Splitter or ribbon cable broken Contact your certified distribu-
Replace the faulty electrode
Section 6.6)
(see
tor.
Section 6.6)
(see
6.5 Diagnosing electrodes with impedance mode problems
To diagnose any impedance mode problems do the following:
-
1 Prepare the saline solution (see Section 6.3.1).
2 Place all electrodes including the ground electrode in the saline bath.
3 Set impedance thresholds to factory default settings.
4 Switch the recording software to impedance mode.
Impedance mode details:
Symptom Possible cause Possible solution
All LEDs are green Expected function None
All LEDs are red GND electrode missing or
defective
Single electrode LED is not
working
The LED cable or impedance
circuit are defective (the elec
trode itself might still deliver
signal)
Connect the GND electrode or
Replace the GND electrode
Section 6.6
(see
Replace the faulty electrode
-
(see
Section 6.6
Chapter 6 Troubleshooting 48
Symptom Possible cause Possible solution
High impedance values (>10k)
for one or more electrode/s
In situations where the problem that has been seen on the test subject and cannot be replicated in
saline wiggle and move the specific electrode cable(s) in the solution.
Electrode (pin worn, broken or
corroded) or electrode cable
broken.
Replace the faulty electrode
Section 6.6
(see
6.6 Replacing a faulty electrode
Replace electrodes at your own risk. You accept responsibility for any damage caused
while following this procedure. If you have any questions please contact our technical
support team.
If required perform a saline test (see Section 6.3.1) to determine which electrode is faulty and requires replacement.
There are two types of splitter box currently in use, each requires a different method when replacing
a faulty electrode. Examine the back of the splitter box, If there is one screw refer to
if your splitter box has five screws refer to Section 6.6.2.
Section 6.6.1,
6.6.1 Replacing electrode in splitter box with one screw
Proceed as follows to replace a faulty electrode:
1 Before replacing the electrode, disconnect the splitter box from the amplifier.
2 Open the splitter box by unscrewing the screw in the center of the cover.
3 Remove the splitter box cover.
4 Unscrew the metal bar on the side of the faulty electrode, by releasing the two small screws at
the end of each bar.
5 Carefully withdraw the faulty electrode from the splitter box (see Figure 6-2). This is best done
by taking a toothpick or small screwdriver, for instance, and carefully removing the front part of
the connector from the splitter box.
Chapter 6 Troubleshooting 49
Figure 6-2. Removing the faulty electrode connector from the splitter box
6 Carefully insert the new electrode. Ensure that the four metal pins on the connector engage cor-
rectly in the splitter box and that the rubber sheathing is aligned and does not protrude.
If the connector is not correctly seated in the splitter box then the electrode will not function correctly.
Figure 6-3. Incorrect positioning of an electrode
7 Mount the metal bar with the flat side facing down and secure it with the two small screws.
8 Mount the cover on the splitter box and secure it with the screw in the middle.
If the EEG curve obtained for an acquisition is very flat or it appears that the replaced electrode is
not working as expected, check that the connector is seated correctly (repeat from step 5 onwards,
paying special attention to the procedure described in step 6).
6.6.2 Replacing electrode in splitter box with five screws
Proceed as follows to replace a faulty electrode:
1 Before the electrode is replaced, disconnect the splitter box from the amplifier.
2 Open the splitter box by unscrewing the five screws on the splitter box cover (see Figure 6-4).
Figure 6-4. Removing the screws from the splitter box
Chapter 6 Troubleshooting 50
3 Remove the splitter box cover.
4 Carefully withdraw the faulty electrode. This is best done by taking a toothpick or screwdriver,
for instance, and carefully removing the front part of the connector from the splitter box (see
Figure 6-5).
Figure 6-5. Removing the electrode from the splitter box
5 Before inserting the new electrode, if your replacement electrode has a rubber sheath slide this
further along the cable as it is no longer required during installation (see
Figure 6-6).
Do not pull on the connector as this may break contacts or damage the metal pins.
Chapter 6 Troubleshooting 51
Figure 6-6. Slide the rubber sheath
6 Carefully insert the new electrode. Ensure that the four metal pins on the connector engage cor-
rectly. Figure 6-7 and Figure 6-8 illustrate an electrode that has been incorrectly inserted.
Figure 6-7. Incorrect positioning of an electrode (A)
Figure 6-8. Incorrect positioning of an electrode (B)
7 Replace the cover on the splitter box and secure it with the five small screws.
If the EEG curve obtained for an acquisition is very flat or it appears that the replaced electrode is
not working as expected, check that the connector is seated correctly (repeat from step 4 onwards,
paying special attention to the procedure described in step 6).
Appendix A Technical data
actiCHamp
Specification Value
Maximum sampling rate: 100,000 Hz*
Maximum number of channels: 160 EEG + 8 AUX
Maximum bandwidth of the EEG channels: DC up to 7,500 Hz
Digitization: 24-bit, one converter/channel
52
Input noise: 2 μVpp (DC – 35 Hz)
Input voltage range: +/- 400 mV (EEG), +/- 4.8 V (AUX)
Common-mode rejection (CMR): 100 dB
Trigger input: 8 bit
TTL signals, 0 to +5 V, max. 10 mA
Trigger output: 8 bit
TTL signals, 0 to +5 V, max. 10 mA
Use with active electrodes: Yes
Use with passive electrodes: No
Impedance measurement: Yes, three colors, displayed via LEDs
Easy replacement of faulty electrodes: Yes, by removal from splitter box
Recording software: BrainVision Recorder (version 1.21.0202 or
later)
BrainVision PyCorder (version 1.0.9 or later)
Integrated AUX/bipolar channels (base module): Yes, 8 AUX channels
Synchronization output: 3.5 mm stereo jack
TTL signal, always ON
Clock signal of A/D converter, based on the
three basic sampling rates of the amplifier
kHz, 50 kHz, 100 kHz).
(10
Dimensions (H x W x D): Approx. 68 mm x 160 mm x 187 mm
Weight: Approx. 1.1 kg
Medical device: No
CE marking: Yes
EMC-tested in accordance with EN 61326-1: Yes
Specification Value
+5 V
Ln +
GND
-5 V
2
5
4
3
1
Ln -
PWR-GND
supply
GND electrode
signal
PWR +3V
supply
Communication
control
4 1
23
4
GND
Bit 3 2 1 0
567
4
GND
Bit 3 2 1 0
567
Appendix A Technical data 53
Checked for electrical safety in accordance with
Yes
IEC 60601-1:
*Please note that the maximum sampling rate depends on the number of channels used. The employed recording program and the computer used to record the data also have a significant impact
on the maximum transmission speed.
The following table contains the recommended values based on the optimum configuration of the
computer used for data recording:
Maximum number of channels: PyCorder Recorder as of version 1.20
160 EEG channels + 8 AUX channels 10 kHz 25 kHz
128 EEG channels + 8 AUX channels 10 kHz 25 kHz
96 EEG channels + 8 AUX channels 10 kHz 25 kHz
64 EEG channels + 8 AUX channels 25 kHz 50 kHz
32 EEG channels + 8 AUX channels 50 kHz 100 kHz
16 EEG channels + 8 AUX channels 100 kHz 100 kHz
Ambient conditions
Operation Temperature: 10 °C to 40 °C (50 °F to 104 °F)
Relative humidity: 25 % to 75 %, non-condensing
Atmospheric pressure: 700 hPa to 1,050 hPa
Storage and transport Temperature: 0 °C to 60 °C (32 °F to 140 °F)
Relative humidity: 25 % to 85 %, non-condensing
Atmospheric pressure: 700 hPa to 1,050 hPa
Pinout of the connectors
Auxiliary (AUX) (5 pin, female) Ground (GND) (4 pin, female)
Trigger In (D-Sub 9, female) Trigger Out (D-Sub 9, male)
Pinout of the connectors
Sync Out
Sync In
Ground
NEW
Sync In/out (stereo plug, female)
actiCHamp Plus
Specification Value
Appendix A Technical data 54
Maximum sampling rate: 100,000 Hz*
Maximum number of channels: 160 EEG + 8 AUX
Maximum bandwidth of the EEG channels: DC up to 7,500 Hz
Digitization: 24-bit, one converter/channel
Input noise: 2 μVpp (DC – 35 Hz)
Input voltage range: +/- 400 mV (EEG), +/- 4.8 V (AUX)
Common-mode rejection (CMR): 100 dB
Trigger input: 8 bit
TTL signals, 0 to +5 V, max. 10 mA
Trigger output: 8 bit
TTL signals, 0 to +5 V, max. 10 mA
Use with active electrodes: Yes
Use with passive electrodes Yes
Impedance measurement: Yes, three colors, displayed via LEDs
Easy replacement of faulty active electrodes: Yes, by removal from splitter box
Recording software: BrainVision Recorder (version 1.22.0001 or
later)
Integrated AUX/bipolar channels (base module): Yes, 8 AUX channels
Synchronization output: 3.5 mm stereo jack
TTL signal, always ON
Clock signal of A/D converter, based on the
three basic sampling rates of the amplifier
kHz, 50 kHz, 100 kHz).
(10
Dimensions (H x W x D): Approx. 68 mm x 160 mm x 187 mm
Weight: Approx. 1.1 kg
Appendix A Technical data 55
+5 V
Ln +
GND
-5 V
2
5
4
3
1
Ln -
PWR-GND
supply
GND electrode
signal
PWR +3V
supply
Communication
control
4 1
23
4
GND
Bit 3 2 1 0
567
4
GND
Bit 3 2 1 0
567
Specification Value
Medical device: No
CE marking: Yes
EMC-tested in accordance with EN61326-1: Yes
*Please note that the maximum sampling rate depends on the number of channels used. The employed recording program and the computer used to record the data also have a significant impact
on the maximum transmission speed.
The following table contains the recommended values based on the optimum configuration of the
computer used for data recording:
Maximum number of channels: Recorder as of version 1.22
160 EEG channels + 8 AUX channels 25 kHz
128 EEG channels + 8 AUX channels 25 kHz
96 EEG channels + 8 AUX channels 25 kHz
64 EEG channels + 8 AUX channels 50 kHz
32 EEG channels + 8 AUX channels 100 kHz
16 EEG channels + 8 AUX channels 100 kHz
Ambient conditions
Operation Temperature: 10 °C to 40 °C (50 °F to 104 °F)
Relative humidity: 25 % to 75 %, non-condensing
Atmospheric pressure: 700 hPa to 1,050 hPa
Storage and transport Temperature: 0 °C to 60 °C (32 °F to 140 °F)
Relative humidity: 25 % to 85 %, non-condensing
Atmospheric pressure: 700 hPa to 1,050 hPa
Pinout of the connectors
Auxiliary (AUX) (5 pin, female) Ground (GND) (4 pin, female)
Trigger In (D-Sub 9, female) Trigger Out (D-Sub 9, male)
Pinout of the connectors
Sync Out
Sync In
Ground
Sync In/out (stereo plug, female)
Appendix A Technical data 56
Appendix A Technical data 57
actiPOWER
Specification Value
Max. number of amplifiers: 1
Rated voltage: 6 VDC
Rated capacity: 7,200 mAh
Output current: Max. 2 A
Rechargeable battery type: Lead rechargeable battery
Operating time for one amplifier: Max. 6 hours (with a fully charged, new bat-
tery)*
Charging time: Typically 4.5 hours (with empty battery at
room temperature)
Dimensions (H x W x D): Approx. 68 mm x 160 mm x 187 mm
Weight: Approx. 1.7 kg
Ambient conditions
Charging Temperature: 10 °C to 30° C (50 °F to 86 °F)
Operation Temperature: 10 °C to 40 °C (50 °F to 104 °F)
Relative humidity: 30 % to 80 %, non-condensing
Atmospheric pressure: 700 hPa to 1,050 hPa
Storage Temperature: 0 °C to 40 °C (32 °F to 104 °F)
Relative humidity: 30 % to 80 %, non-condensing
Atmospheric pressure: 700 hPa to 1,050 hPa
Transport Temperature: 0 °C to 60 °C (32 °F to 140 °F)
Relative humidity: 30 % to 80 %, non-condensing
Atmospheric pressure: 700 hPa to 1,050 hPa
Appendix A Technical data 58
NEW
PowerUnit
Specification Value
Max. number of amplifiers: 1
Rated voltage: 6.6 V DC
Rated capacity: 12.5 Ah
Rated energy: 82.5 Wh
Output current: Max. 3 A
Rechargeable battery type: Lithium-ion (lithium iron phosphate (LiFe-
PO4))
Operating time for one amplifier: Max. 16 hours (with a fully charged, new bat-
tery)
Charging time: Approx. 10 hours (with empty battery at
room temperature)
Dimensions (H x W x D): Approx. 68 mm x 160 mm x 187 mm
Weight: Approx. 1.2 kg
Storage and transport condition <30% of full capacity
Ambient conditions
Charging Temperature: 10 °C to 30° C (50 °F to 86 °F)
Operation Temperature: 10 °C to 40 °C (50 °F to 104 °F)
Relative humidity: 30 % to 80 %, non-condensing
Atmospheric pressure: 700 hPa to 1,050 hPa
Storage Temperature: 0 °C to 40 °C (32 °F to 104 °F)
Relative humidity: 30 % to 80 %, non-condensing
Atmospheric pressure: 700 hPa to 1,050 hPa
Transport Temperature: 0 °C to 60 °C (32 °F to 140 °F)
Relative humidity: 30 % to 80 %, non-condensing
Atmospheric pressure: 700 hPa to 1,050 hPa
To prevent mechanical damage during transport, please pack the product in such a way,
that it is not subject to vibration.
Appendix A Technical data 59
actiCAP electrodes
The following conditions must be satisfied for the use of the actiCAP electrodes and the splitter box:
Ambient conditions
Operation Temperature: 0 °C to 30 °C (32 °F to 86 °F)
Relative humidity: 30 % to 95 %, non-condensing
Atmospheric pressure: 700 hPa to 1,050 hPa
Storage and transport Temperature range: 0 °C to 60 °C (32 °F to 140 °F)
Relative humidity: 25 % to 85 %, non-condensing
Atmospheric pressure: 700 hPa to 1,050 hPa
Appendix B Active electrodes
How the active electrodes work
The actiCAP electrodes possess high-quality Ag/Ag-Cl pellets as well as “active” circuits that are integrated in the electrodes. These features make it possible to perform recording at high electrode
impedances (e.g. 60 kOhm).
Alongside the integrated impedance converter, the electrodes also possess special electronic components, which enable the amplifier system to measure the impedances between the electrode and
the scalp. Multi-color LEDs in the electrodes indicate the impedance ranges. The default ranges are
as follows:
60
green = less than 25 kOhm
yellow = between 25 and 60 kOhm
red = greater than 60 kOhm.
For information on identifying and correcting defective electrodes, see Chapter 5.
The principle of impedance conversion
The term “impedance conversion” refers to the transformation of an input resistance RI into an output resistance RO. The input voltage UI at the input resistance RI is identical to the output voltage U
at the output resistance RO.
In practice, it can be assumed that the impedance converter possesses a very high input resistance
and a low output resistance RO. This reflects the fact that most signal sources have a high internal
R
I
resistance R
physiological characteristics, i.e. the electrical properties of tissue and bone, interposed between
the signal source (nerves) and the receivers (electrodes).
which cannot be modified. In the field of electroencephalography, this is due to the
S
O
Appendix B Active electrodes 61
NEW
Figure B-1. Impedance conversion
In combination with the internal resistance RS of the signal source US, the input resistance RI of the
impedance converter acts as a voltage divider. If, as assumed, the input resistance R
high value compared to the internal resistance R
then the attenuation due to the acquisition sys-
S
has a very
I
tem can be ignored. Because the impedance converter does not allow any feedback from its output,
the signal source is not distorted. At the impedance converter output, the small output resistance
acts as a power amplifier (drive). At the low-impedance side of the impedance converter, the par-
R
O
asitic characteristics of the electrode lines and any external sources of interference have a far smaller impact on subsequent transmission quality.
It is therefore vital to use impedance conversion to prepare the signal as close as possible to the
electrode. The actiCHamp system meets this requirement through the use of active electrodes.
Active shielding
actiCHamp and actiCHamp Plus support two modes of recording: The default mode and the active
shielding mode. The shielding mode is available in Recorder and can be activated in PyCorder in the
source code. It can be used with the referential (Recorder and PyCorder) and reference-free (PyCord
er only) montage (refer to the glossary for further information). Channel 1 is used as the source for
the shielding signal (refer to
Environmental noise can have different characteristics depending on their source (AC power lines,
computers, displays, wireless equipment). The critical distinctive features are the mode (normal
mode and common mode) and the distribution across the EEG channels. AC line noise usually is
common mode noise but shows a large variation regarding the topographical distribution: The fron
tal positions are often more affected than occipital channels (when facing a computer screen, for
example).
Section 3.3 as of page 38).
-
-
As a rule of thumb, the better the noise fulfills the common mode characteristics and the more uniform the distribution is, the better shielding mode works.
In contrast, for channels that are less affected by common mode noise, shielding mode can cause
an over-compensation, which results in more noisy signals, since the assumptions of the noise
characteristics are not fulfilled.
In any case the data are modified: Either reversible (referencing) or irreversible (active shielding).
Appendix B Active electrodes 62
GND Electrode Signal
NEW
Thus, for using a reference channel (i.e. referencing) together with the active shielding mode, the
characteristics of the noise and the environment have to be considered. The best way of selecting
the appropriate strategy is to carefully evaluate the recorded pilot data in both time and frequency
domain.
Even though actiCHamp and actiCHamp Plus are highly immune to environmental electrical noise
due to the flexible handling of referencing and shielding mode, the best way is to eliminate electri
cal noise at the source.
The principle of reference-free acquisition
The signals are acquired without a physical reference electrode. Internally, the amplifier uses the
GND electrode signal as the reference.
-
Figure B-2. Representation of the GND electrode signal
The recording program allows you to define any electrode of your choice as the software reference.
The system calculates the difference between software reference and the other acquired channels
for each data point.
Note on role of the ground electrode
The physically present ground electrode prevents the DC drift of the amplifier system.
If you use the actiCHamp's or actiCHamp Plus’s default recording mode without active
shielding then the positioning of the ground electrode is crucial in determining the
signal quality for recording. Position the ground electrode in a location that is partic
-
ularly exposed to external interferences.
Glossary
63
A
Active electrodes: Electrode with integrated circuits (impedance converters) which makes it
possible to perform recordings at high impedances.
Active Shielding: Recording mode that allows
ambient noise, interference due to electrical effects and artifacts due to cable movement to be
minimized.
AUX channel: Supplementary channel for simultaneously recording polygraph signals such as
breathing, ECG, eye movement, oxygen saturation, etc.
B
Baseline: An assumed horizontal line marking
the vertical zero point in the EEG (voltage = 0).
I
P
Physical channel: Hardware-related assignment of a channel on the basis of its position in
an EEG system.
Potential: Frequently used as a synonym for EEG
wave.
R
Reference-free Recording Mode: In referencefree recording mode the signal of each electrode is measured against the GND electrode
signal. The common mode rejection against
identical artifacts in all signals is weaker than in
referential recording mode. In this mode the line
noise artifacts are proportional to the electrode
impedances.
Referential Recording Mode: In referential recording mode the signal of the chosen REF electrode is subtracted from the signal of each other
electrode. This increases the common mode rejection against identical artifacts in all signals.
Impedance: Impedance is the measure of the
opposition that a circuit presents to an alternating current when a voltage is applied.
M
Mode LED: There is one Mode LED on the actiCHamp base module and one on every 32-channel module. The Mode LED on base module
blinks green, when actiCHamp is connected to a
computer. The Mode LED on every 32-channel
module illuminates green in normal operation
and red if the communication is disturbed. If it
illuminates red, check the USB cable and status
of the power supply
S
Sampling rate: Number of data points measured per second when acquiring an EEG digitally.
Splitter box: Component in which the cables of
the actiCAP electrodes are brought together and
via which the electrodes can be connected to
the actiCHamp.
T
Trigger: Pulse generated by an equipment or
software program and which initiates an operation. A presentation software package can, for
example, generate a trigger each time an image
appears. The trigger is sent to the amplifier via
the parallel port of the computer and recorded
by the recording program as a marker simultaneously with the EEG. EEG activity (e.g. an EEG
signal of sufficient amplitude or length) can
also be used to generate a trigger pulse that
starts a process (e.g. control of a program).
Glossary 64
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