Thought Technology MYOTRAC INFINITI User Manual
MYOTRAC INFINITI™
User Guide
MyoTrac Infiniti™ User Guide 2
The Manufacturer:
Thought Technology Ltd.
2180 Belgrave Avenue
Montreal, Quebec, Canada
H4A 2L8
Product Name:
MyoTrac Infiniti System
Product #:
T9800
Device Name:
MyoTrac Infiniti Encoder
Device #:
SA9800
EC
REP
EMERGO EUROPE
Molenstraat 15
2513 BH, The Hague
The Netherlands
Tel: +31.70.345.8570
Fax: +31.70.346.7299
MyoTrac Infiniti™ User Guide 3
Type BF Equipment
Internally powered equipment
Continuous operation
Read Instruction Manual
The pins of the connectors identified with the ESD warning symbol should not be touched
unless ESB precautionary procedures are used.
CAUTION
US Federal Law restricts this device to sale by, or on order of, a physician or any other
practitioner licensed by the law of the state in which he or she practices to use or order the
use of this device.
WARNING
Do not operate Active Sensors within 10 feet of an operating cellular phone, similar radio
transmitting device, other powerful radio interference producing sources such as arc
welders, radio thermal treatment equipment, x-ray machines, or any other equipment that
produces electrical sparks. Portable and mobile RF communication equipment can affect
this equipment.
With the MyoTrac Infiniti Encoder SA9800 use only with supplied power supply. GlobTek
Part Number WR92B2500LF9P-Y-MED (WR95/WR93/WR97) or GS889
The PC used with MyoTrac Infiniti must be placed outside the patient/client environment
(more than 3 meters or 10 feet) or the PC must comply with EN60601-1 (system safety).
After use, the Batteries or the Battery pack must be disposed of in accordance with local,
state and federal regulations and laws.
After use, the Disposable Electrodes may be 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.
Reusable electrodes present a potential risk of cross-infection especially when used on
abraded skin, unless they are restricted to a single patient or sterilized between patients. If
sterilizing electrodes, employ only gas sterilization.
Radiated radio frequency electromagnetic fields can cause performance degradation in the
MyoScan EMG sensor. In the worst case, an RF field strength of 22mV/M can cause an
increase of 1V in the signal reading from a MyoScan sensor. Be sure to keep in mind that
a very relaxed muscle should provide an EMG reading of approximately 1-3V.
This device is capable of generating current densities exceeding 2mA r.m.s./cm² this may
require special attention of the operator.
Do not exceed 0.1watts/cm² with recommended electrodes, assuming a load of 500.
1. 1’’ Round = Max 69mA
2. 2’’ x 2’’ Square = Max 100mA
3. 3’’ x 4’’ Rectangle = Max 100mA
4. St Cloud = Max 100mA
5. Femelex = Max 100mA
Avoid accidental contact between connected but unused applied parts and other conductive
parts including those connected to protective earth.
Explosion Hazard; Do not use in the presence of a flammable anesthetic mixture with air, or
with Oxygen or Nitrous Oxide.
Not to be immersed in water.
Take care in arranging patient and sensor cables to avoid risk of patient entanglement or
strangulation.
The operator is responsible for ensuring the safety of any devices controlled or triggered by
Infiniti equipment or software, or by any software or hardware receiving data from Infiniti
equipment. Infiniti equipment must not be configured or connected in such a way that
failure in its data acquisition, processing or control functions can trigger patient feedback
stimulus that poses an unacceptable level of risk.
Use of any equipment in a biofeedback or stimulation context should be immediately
MyoTrac Infiniti™ User Guide 4
terminated upon any sign of treatment-related distress or discomfort.
Not to be connected to a patient undergoing MRI, Electro surgery or defibrillation.
Simultaneous connection of a patient to a high frequency surgical equipment may result in
burns at the site of the stimulator electrodes and possible damage to the stimulator.
Operations in close proximity (e.g. 1 m) to shortwave or microwave therapy equipment may
produce instability in the stimulation output.
The long-term effects of chronic electrical stimulation are unknown.
Stimulation should not be applied over the carotid sinus nerves, particularly in patients with
a known sensitivity to the carotid sinus reflex.
Stimulation should not be applied over the neck or mouth. Severe spasm of the laryngeal
and pharyngeal muscles may occur and the contractions may be strong enough to close the
airway or cause difficulty in breathing.
Patients with an implanted electronic device (for example a cardiac pacemaker) should not
be subjected to stimulation unless specialist medical opinion has first been obtained.
Stimulation should not be applied transthoracically in that the introduction of electrical
current into the heart may cause cardiac arrhythmias.
Stimulation should not be applied transcerebrally.
Stimulation should not be applied over swollen, infected, or inflamed areas or skin
eruptions, e.g., phlebitis, thrombophlebitis, varicose veins, etc.
Stimulation should not be applied over, or in proximity to, cancerous lesions.
Not for use with patients with undiagnosed pain conditions.
Only use the unit for which it was prescribed.
Do not immerse the unit in water or any other liquid substance.
Do not use if you have symptoms of bladder infection.
Do not use with diminished mental capacity or physical competence limiting the use of the
device.
Safety of powered muscle stimulators for use during pregnancy has not been established.
Caution should be used for patients with suspected or diagnosed heart problems.
Caution should be used for patients with suspected or diagnosed epilepsy.
Caution should be used in the presence of the following:
1. When there is a tendency to hemorrhage following acute trauma or fracture;
2. Following recent surgical procedures when muscle contraction may disrupt the
healing process;
3. Over the menstruating or pregnant uterus; and
4. Over areas of the skin which lack normal sensation.
Some patients may experience skin irritation or hypersensitivity due to the electrical
stimulation or electrical conductive medium. The irritation can usually be reduced by using
an alternate conductive medium, or alternate electrode placement.
Electrode placement and stimulation settings should be based on the guidance of the
prescribing practitioner.
Powered muscle stimulators should be kept out of the reach of children.
If damage is evident of the unit or accessories, discontinue use and contact your supplier
for further information on repair.
Powered muscle stimulators should be used only with the leads and electrodes
recommended for use by the manufacturer.
Portable powered muscle stimulators should not be used while driving, operating
machinery, or during any activity in which involuntary muscle contractions may put the user
at undue risk of injury.
The system should not be used adjacent to or stacked with other equipment, if used
adjacent or stacked the unit should be observed to verify normal operation in the
configuration in which it will be used.
Use of accessories, transducers or cables other than those specified by Thought
Technology ltd may result in increased emissions or decreased immunity of the equipment
to electromagnetic energy.
ATTENTION
Sensors and equipment damaged by static electricity are not covered under warranty. To
prevent static discharge from damaging the sensor and/or encoders, use anti-static mats or
sprays in your working area. A humidifier may also be used to prevent static environments
MyoTrac Infiniti™ User Guide 5
by conditioning hot, dry air. It is recommended that all staff involved with the unit receive an
explanation of the ESD symbol and the precautions described above as a minimum.
Do not apply any electrode gel or equivalent directly on the sensor snaps. Always use
electrodes as a medium between the sensor and the client.
Not for diagnostic purposes, not defibrillator proof, not for critical patient monitoring.
To prevent voiding warranty by breaking connector pins, carefully align white guiding dot on
sensor plug with slot on sensor input.
Make sure to remove electrodes from sensor snaps immediately after use.
Do not plug third party sensors directly into instrument inputs. Plug only Thought
Technology Active Sensor cable connectors into instrument inputs. All electrodes and third
party sensors must be connected to active sensors, either directly or through an adapter.
Remove batteries when the device is not being used for an extended period of time. Please
dispose of battery following local regulations.
ADVERSE REACTIONS
Skin irritation and burns beneath the electrodes have been reported with the use of powered muscle
stimulators.
CONTRAINDICATIONS
Powered muscle stimulators should not be used on patients with cardiac demand
pacemakers.
INTENDED PURPOSE
Biofeedback, Relaxation & Muscle Re-Education purposes
Relaxation of muscle spasms
Prevention or retardation of disuse atrophy
Increasing local blood circulation
Stroke Rehab by Muscle re-education
Immediate post-surgical stimulation of calf muscles to prevent venous thrombosis
Maintaining or increasing range of motion
Acute and ongoing treatment of stress, urge or mixed urinary incontinence and where the
following results may improve urinary control: Inhibition of the detruser muscle through
reflexive mechanisms.
Incontinence treatment for assessing EMG activity of the pelvic floor and accessory muscles such
as the abdominal or gluteal muscles
Powered muscle stimulators should only be used under medical supervision for adjunctive
therapy for the treatment of medical diseases and conditions
NOTE
No preventative inspections required; maintenance must be performed by qualified personnel.
Factory re-calibration can be requested.
The supplier will make available, upon request, circuit diagrams, component parts lists and
description or other information required for the repair of product by qualified personnel.
The operator must be familiar with typical characteristics of signals acquired by this
equipment, and be able to detect anomalies in the acquired signal that could interfere with
treatment effectiveness. Depending on the importance of signal integrity, it may be advisable
to continuously monitor the raw signals, in time and/or frequency domain, while the device is
being used for biofeedback or other purposes. If anomalies are observed on acquired signals,
and if you suspect a problem with electromagnetic interference, contact Thought Technology
for a technical note on identification and remediation.
This product conforms to standards EN60601-1, EN60601-2-10 and EN60601-2-40; some
encoder labeling may indicate superceded standards.
MAINTENANCE AND CALIBRATION
Wipe encoder with a clean cloth
Factory testing and calibration ensure equipment accuracy and frequency response. Contact
Thought Technology for factory re-calibration if necessary.
STORAGE
Store in its original case at up to 90% humidity / 30C°
TRANSPORTATION
Transport in its original case
Manual # SA9810US Rev 5
MyoTrac Infiniti™ User Guide 6
Guidance and manufacturer’s declaration – electromagnetic immunity
The MyoTrac Infiniti is intended for use in the electromagnetic environment specified below. The customer or the
user of the MyoTrac Infiniti should assure that it is used in such an environment, and that precautions regarding
that environment are heeded.
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 differential
mode
2 kV common mode
1 kV differential
mode
2 kV common mode
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 sec
<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 sec
Mains power quality should be that of a
typical commercial or hospital
environment. If the user of the
MyoTrac Infiniti requires
continued operation during power
mains interruptions, it is recommended
that the MyoTrac Infiniti be
powered from an uninterruptible power
supply or a battery.
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.
MyoTrac Infiniti™ User Guide 7
Guidance and manufacturer’s declaration – electromagnetic immunity
The MyoTrac Infiniti is intended for use in the electromagnetic environment specified below. The customer or the user of
the MyoTrac Infiniti should assure that it is used in such an environment.
Immunity test
IEC 60601 test level
Compliance
level
Electromagnetic environment – guidance
Portable and mobile RF communications equipment
should be used no closer to any part of the
MyoTrac Infiniti, including cables, than the
recommended separation distance calculated from
the equation applicable to the frequency of the
transmitter.
Recommended separation distance
Conducted RF
IEC 61000-4-6
3 Vrms
150 kHz to 80 MHz
3 Vrms
150 kHz to 80
MHz
Pd 2.1
80 MHz to 800 MHz
Radiated RF
IEC 61000-4-3
3 V/m
80 MHz to 2,5 GHz
3 V/m
80 MHz to 2,5
GHz
Pd 2.1
80 MHz to 800 MHz
Pd 3.2
800 MHz to 2.5GHz
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 MyoTrac Infiniti is used exceeds the applicable
RF compliance level above, the MyoTrac Infiniti should be observed to verify normal operation. If abnormal
performance is observed, additional measures may be necessary, such as reorienting or relocating the MyoTrac
Infiniti.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than [V1] V/m.
MyoTrac Infiniti™ User Guide 8
Recommended separation distances between
portable and mobile RF communications equipment and the MyoTrac Infiniti
The MyoTrac Infiniti is intended for use in an electromagnetic environment in which radiated RF disturbances
are controlled. The customer or the user of the MyoTrac Infiniti can help prevent electromagnetic interference by
maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and the
MyoTrac Infiniti 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
150 kHz to 80 MHz
80 MHz to 800 MHz
800 MHz to 2,5 GHz
Pd 2.1
Pd 2.1
Pd 3.2
0,01
0.12
0.12
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.
Guidance and manufacturer’s declaration – electromagnetic emissions
The MyoTrac Infiniti is intended for use in the electromagnetic environment specified below. The customer or the user of
the MyoTrac Infiniti should assure that it is used in such an environment.
Emissions test
Compliance
Electromagnetic environment – guidance
RF emissions
CISPR 11
Group 1
The MyoTrac Infiniti 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 MyoTrac Infiniti is suitable for use in all establishments,
including domestic establishments 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
MyoTrac Infiniti™ User Guide 9
Table of Contents
About This Guide..................................................................................................................................................................... 11
Chapter 1 .................................................................................................................................................................................. 12
Introduction to your MYOTRAC INFINITI™ Encoder ............................................................................................................ 12
System Requirements .......................................................................................................................................................... 13
MyoTrac Infiniti Components ................................................................................................................................................ 14
Connection to the Client ....................................................................................................................................................... 17
Connection to the PC ........................................................................................................................................................... 22
Screen Elements .................................................................................................................................................................. 23
Thought Support .................................................................................................................................................................. 23
Settings Menu ...................................................................................................................................................................... 24
Chapter 2 .................................................................................................................................................................................. 28
SEMG sessions on your MYOTRAC INFINITI™ Encoder ..................................................................................................... 28
Open SEMG Sessions ......................................................................................................................................................... 28
Script SEMG Sessions ......................................................................................................................................................... 30
Chapter 3 .................................................................................................................................................................................. 32
Stim sessions on your MYOTRAC INFINITI™ Encoder ................................................................................................ ........ 32
Open Stim Session .............................................................................................................................................................. 33
Script Stim Sessions ............................................................................................................................................................ 36
Chapter 4 .................................................................................................................................................................................. 37
EMG-STIM on your MYOTRAC INFINITI™ Encoder ............................................................................................................ 37
Chapter 5 .................................................................................................................................................................................. 41
Data Management on your MYOTRAC INFINITI™ Encoder ................................................................................................. 41
MyoTrac Infiniti Review ........................................................................................................................................................ 42
Chapter 6 .................................................................................................................................................................................. 43
Display Options on your MYOTRAC INFINITI™ Encoder ..................................................................................................... 43
Displays ............................................................................................................................................................................... 43
Chapter 7 .................................................................................................................................................................................. 47
Flow on your MYOTRAC INFINITI™ Encoder ................................................................ ..................................................... 47
Chapter 8 .................................................................................................................................................................................. 48
Reference ............................................................................................................................................................................ 48
Technical Support and Order Placing ................................................................................................................................... 49
Technical Support ................................................................................................................................................................ 49
Product Numbers & Accessories .......................................................................................................................................... 50
Placing Orders ..................................................................................................................................................................... 51
Specifications ....................................................................................................................................................................... 52
MyoTrac Infiniti Hardware Copyright Notice ......................................................................................................................... 56
MyoTrac Infiniti™ User Guide 10
About This Guide
Welcome to the MYOTRAC INFINITI™ encoder. This guide is designed to help you get up and
running quickly with your new encoder. It will describe the operation of the encoder, and how it
interfaces to the host personal computer (PC).
It walks you through:
Physical Operation of the encoder.
EMG, Stimulation and EMG-STIM sessions.
Data management.
Display options.
After you have become familiar with the key concepts of your new encoder, you can use the rest of
this guide as a reference for less common tasks, and also as a source of information if you have
problems operating it.
MyoTrac Infiniti™ User Guide 11
Chapter 1
Introduction to your MYOTRAC INFINITI™ Encoder
This chapter explains the physical interface with the MyoTrac Infiniti Encoder, how to use it for the
first time, and how to transfer data to the host PC.
Getting to know your MyoTrac Infiniti Encoder
What is a MyoTrac Infiniti Encoder?
The MyoTrac Infiniti is the cutting edge in handheld, dual channel Surface Electromyography
(SEMG) combined with Muscle Stimulation (STIM), for contraction of muscles and for urinary
incontinence. With it you will be able to deliver targeted and customized treatment directly to the
client’s clinically relevant areas. The total integration of the two modalities of SEMG and STIM in a
single device provides a third modality of treatment-SEMG-STIM, with features such as EMGTriggered Stimulation and Alternating EMG and STIM.
Note: EMG triggered STIM is not available for incontinence application.
A simple first approach has been adopted in the design of the MyoTrac Infiniti to make it as easy
and fast as possible to get the clinical results desired from this powerful device.
Customizing the MyoTrac Infiniti to your clinical needs couldn’t be easier; all users input is directed
through a series of intuitive and guided screens using touch screen technology.
The partnership of the MyoTrac Infiniti with the BioGraph Infiniti PC software enhances yet further
the power and flexibility of the MyoTrac Infiniti. This link enables you to transfer session data to the
PC for further viewing, analysis and reporting, in real time or post session.
MyoTrac Infiniti™ User Guide 12
System Requirements
Recommended
Minimum
IBM PC compatible
(Intel/Pentium/Celeron family or AMD
K6/Athlon/Duron family, CPU P4 speed 3
GHz or higher), Desktop or Laptop with
two monitor capability
Windows 2000/XP Professional or Home
edition.
50 - 60 gigabytes hard disk space for
video recording and processing. (The
software needs 2.5 gigabytes to install
and run on available hard drive space)
Memory, 512 MB of RAM or more
CD ROM or DVD drive
SVGA graphic card (1024 x 768) or higher
resolution adapter & monitor
32 bit Sound Blaster compatible sound
card & speakers
1 to 4 USB ports, depending on the
desired number of MyoTrac Infiniti
encoders
Mouse or compatible pointing device
MS Word 97 or higher (for printing
purposes)
Compact Flash Reader (For use with
compact flash card only)
Webcam 30 frames per second (for video
purposes only)
NOTE: When using certain more complex
screens, you must adhere to the
Recommended Computer Requirements.
IBM PC compatible
(Intel/Pentium/Celeron family or AMD
K6/Athlon/Duron family, CPU P3
speed 1.8 GHz), Desktop or Laptop
Windows 2000/XP Professional or
Home edition.
10 - 20 gigabytes hard disk space
(The software needs 2.5 gigabytes to
install and run on available hard drive
space)
Memory, 256 MB of RAM or more
CD ROM or DVD drive
SVGA graphic card (1024 x 768) or
higher resolution adapter & monitor
16 Bit Sound Blaster compatible
sound card & speakers
1 to 4 USB ports, depending on the
desired number of MyoTrac Infiniti
encoders
Mouse or compatible pointing device
Word 97 or higher (for printing
purposes)
NOTE: For most recent computer
requirements contact Thought Technology
Ltd for MAR473
To install the BioGraph Infiniti software, your computer system must meet or exceed the following
requirements.
Update information
Periodically updates may become available for the BioGraph Infiniti software and for the MyoTrac
Infiniti Hardware. Please contact your local distributor or visit our website
www.thoughttechnology.com for further information on how to obtain updates.
MyoTrac Infiniti™ User Guide 13
MyoTrac Infiniti Components
Compact Flash for increased memory capacity and one method for transfer of data to the PC.
USB for real time transfer of data to the PC.
Touch screen enables graphically guided navigation through the software.
Rugged Ergonomic Case, easy to hold or attach to the subject and will withstand the rigors of
daily use.
Battery Charging jack for wall connection enables fast built-in battery charging.
Headphone Jack for stereo sound feedback (or use the built-in speaker).
Push button On/Off switch to prevent accidental switching.
2 Channels of Surface EMG and stimulation through the same electrodes; saves time and
increases flexibility.
MyoTrac Infiniti™ User Guide 14
Power
There are three basic methods to power the MyoTrac Infiniti unit: Inserting batteries into the battery
compartment of the unit, plugging it into the wall using the supplied AC adapter, or plugging it into a
powered up computer using a USB cable.
The MyoTrac Infiniti is available with battery charging capabilities. It will work with four standard
Alkaline AAA batteries available in all consumer electrical stores. It is also possible to run the unit
on removable, externally rechargeable batteries. A rechargeable battery pack is supplied with the
MyoTrac Infiniti and can be charged while still inside the unit.
Note: When changing batteries it is recommended to plug the unit into external power, either USB
or wall transformer so that data is not lost. Failure to supply external power will result in data and
script loss.
The battery compartment cover slides open by pushing up using the notch provided. Place four
AAA batteries in the slots, observing the polarity as illustrated. Please note that a diagram of the
correct battery polarity is embossed on the inside surface of the compartment.
Alternatively it is possible to use a rechargeable battery pack (Thought Technology Part Number
MI1028). This battery pack is plugged into the connector in the battery compartment marked
BATT. The pack then fits into the normal battery area. Note: only use battery packs from Thought
Technology or authorized representative, as use of other battery packs will damage the device.
A wall mounted AC power adapter, supplied with the MyoTrac Infiniti, is used to connect the unit to
an electrical outlet. This can be used in conjunction with the batteries or without.
The unit can also be powered from the computer via the USB cable. The cable is connected to the
unit on one side and on the other side to the USB port of the computer. This can be used in
conjunction with or without the batteries.
Charging the Batteries
MyoTrac Infiniti™ User Guide 15
64MB
1.75 hours
128MB
3.5 hours
256MB
7 hours
512MB
14 hours
1GB
27.5 hours
2GB
55.5 hours
Note: exact power supply subject to change without notice.
Internal Charger
If your MyoTrac Infiniti was supplied with a wall mounted AC adapter it is possible to charge the
battery pack while it is inserted in the device.
Note: Only use Thought Technology Ltd supplied wall mounted chargers with this device. Failure
to do so could result in potential injury. Use only GlobTek Part Number WR92B2500LCP-Y-MED
To start the charging plug in either the wall mounted AC adaptor or the USB cable. A full charging
cycle from fully empty to fully charged will take approximately 2hrs for AC adaptor and 5.5hrs for
the USB cable. The unit can be used while plugged in to either power source. The charging cycle
does not need to be completed in full; it can be stopped at anytime by removing the connector.
When the unit is turned off while plugged into an external power source, the screen displays a
battery symbol. Charging action is shown with an animation of the battery filling up. When the
battery is fully charged, the symbol shows a full battery.
If the unit is plugged into an external power source while it is turned off, it will start charging within
one minute.
The state of the battery charging is available by going to the power menu in the settings menu of
the device. It indicates the current mode of power and whether the unit is currently charging the
batteries.
Note: The rechargeable batteries must be fully charged prior to initial use. In order for the batteries
to reach full capacity it may be necessary to charge them several times (~2-8) after initial use.
Memory
Recorded data can be saved using three methods - choose the one which most closely matches
your usage needs. To select saving method, select the Settings menu from the main menu, and
tap on the Save icon. Note data can only be recorded from EMG sessions not from Stim sessions.
Internal Memory – Limited size, only the statistical summaries are recorded. Specifically, the
statistics for 13 open sessions or 9 training sessions (work/rest) or 6 assessment sessions
(work/rest + fast-flick + endurance) can be recorded. Data can be lost if the batteries are
removed from the unit for longer than a few minutes.
Compact Flash Card – Most flexible method of data saving: save all the raw data for review
on the encoder or for download to the PC. Available in most electronics stores in a range of
memory sizes. Since all EMG data is recorded, the amount of data that is saved to the
compact flash card depends on the size of the card:
The encoder is delivered with a protective insert in the compact flash slot. To remove it, push
the button next to the slot once to eject the card. The CF card can then be inserted; you will
MyoTrac Infiniti™ User Guide 16
notice that the CF card can only be inserted one way into the encoder to protect from incorrect
insertion. When inserted properly it will be flush with the encoder rear. Follow the procedure
above to remove this card when no longer required, and re-insert the protective insert. CF
cards require a CF card reader to transfer data to the PC. The CF cards and reader can be
purchased from most computer stores. Before its first use in the encoder, a CF card requires
PC formatting using the file manager, then format the card using the BioGraph Infiniti Main
Application. Formatting and transferring CF data to the PC is covered in depth in the
BioGraph Infiniti software manual.
Real Time PC Transfer – Connect to the PC via the USB and save and display the data on
the PC in real time. See the following section “Connection to the PC”.
Attention: Do not remove the CF card without first stopping recording. If the CF card is removed
during recording, you will lose all the data for the current session.
Tapping
Like using a mouse on a computer screen the MyoTrac Infiniti allows you to use your finger or a
stylus to tap the buttons directly on the screen. The first time you start your handheld unit, or if the
power has been disconnected for a while, you will be guided through a set of welcome screens
including calibration, time and date setting. The calibration aligns the internal circuitry of the
encoder with its touch sensitive screen so that when you tap a button on the screen, the handheld
unit can detect exactly which button is being pressed.
Note: Always use a stylus for tapping the screen. Never use a pen, pencil or other marking or
sharp object on the screen. Damage resulting from misuse of the screen is not covered by the
warranty.
As necessary wipe screen with a dry cloth to clean.
Connection to the Client
Depending on the type of session you are going to record there are different ways to connect the
two channels to the client.
EMG only – Either plug the extender cable into the device directly and connect to the client
with EMG or Stimulation electrodes, or plug them into the pre-amplifier and the pre-amplifier
into the MyoTrac Infiniti.
Stim only – Plug the extender cable into the device directly and connect to stimulation
electrodes, selecting the appropriate size stim electrode for the treatment to be delivered.
EMG-Stim – As the session contains a stimulation element follow the stim instructions,
connecting only using the extender cable, ensure that you use stim electrodes not SEMG
electrodes.
Attention: Do not use SEMG type electrodes for STIM or EMG-STIM
Sessions.
MyoTrac Infiniti™ User Guide 17
Attention: When you insert the extender cable (lead wire) into the electrode
connector, MAKE SURE THAT NO BARE METAL OF THE PINS IS EXPOSED.
Attention: When using stimulation ensure that the intensity is set below the maximum for the
selected electrode size. This is assuming an electrode impedance of 500 or 1k respectively.
1’’ Round = Max 69mA / 49mA
2’’ x 2’’ Square = Max 100mA / 100mA
3’’ x 4’’ Rectangle = Max 100mA / 100mA
St Cloud Vaginal = Max 100mA / 74mA
Femelex = Max 100mA
Note: If an external pre-amplifier is connected to the device all stim settings are disabled to protect
the circuitry of the amplifier.
MyoTrac Infiniti™ User Guide 18
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