AtriCure ASU3-230 User manual

ABLATION AND SENSING UNIT (ASU)
USER’S MANUAL
Model ASU2-115
Model ASU3-230
AtriCure Incorporated
7555 Innovation Way
Mason, Ohio 45040 USA
Customer Service:
1-866-349-2342 (toll free)
1-513-755-4100 (phone)
P000463 Rev. F

USER’S MANUAL
European Representative:
Herbert Köntges
Köntges SPRL
Avenue Hellevelt 35
B-1180 Brussels Belgium
Tel: [phone]
FAX: [phone]
email: [e-mail]

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Table of Contents
1. GETTING STARTED...................................................................................................................3
1.1. System Description ............................................................................................................4
1.2. Unpacking ..........................................................................................................................4
1.3. Warnings and Precautions..................................................................................................4
1.4. EMC Guidance and Manufacturer’s Declaration...............................................................7
1.5. Responsibility of the Manufacturer..................................................................................10
2. THE ATRICURE ABLATION AND SENSING UNIT (ASU)...............................................11
2.1. Device Description...........................................................................................................11
2.2. ASU Front Panel –Illustration and Nomenclature ..........................................................11
2.3. ASU Rear Panel –Illustration and Nomenclature ...........................................................14
3. INSTALLING THE ASU............................................................................................................16
3.1. Transporting the ASU ......................................................................................................16
3.2. Adjusting the Viewing Angle...........................................................................................16
3.3. Preparing the ASU For Use..............................................................................................16
3.4. Power Cord.......................................................................................................................16
3.5. Connecting and Disconnecting the Handpiece.................................................................17
3.6. Installing the Footswitch..................................................................................................17
4. INSTRUCTIONS FOR USE.......................................................................................................19
4.1. Powering Up the ASU......................................................................................................19
4.2. Operating Modes..............................................................................................................20
4.3. Audio Tones.....................................................................................................................21
4.4. Delivering RF Energy ......................................................................................................22
5. TROUBLESHOOTING ..............................................................................................................25
5.1. No RF Power Output........................................................................................................25
5.2. Error Codes ......................................................................................................................25
5.3. Electromagnetic or Other Interference.............................................................................26
6. SYMBOLS USED.........................................................................................................................28
7. TECHNICAL SPECIFICATIONS............................................................................................29
7.1. RF Output.........................................................................................................................29
7.2. Mechanical Specifications................................................................................................29
7.3. Environmental Specifications ..........................................................................................29
7.4. Electrical Specifications...................................................................................................30
7.5. Fuses.................................................................................................................................30
7.6. Footswitch Specifications ................................................................................................30
7.7. Power and Voltage Output Restrictions...........................................................................30
7.8. Equipment Type / Classification......................................................................................30
8. PREVENTIVE MAINTENANCE AND CLEANING OF ASU.............................................33
8.1. Preventive Maintenance...................................................................................................33

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8.2. Cleaning and Disinfecting................................................................................................34
9. DISPOSAL....................................................................................................................................35
10. ACCESSORIES............................................................................................................................35
10.1. ASB1, Source Switch Accessory .....................................................................................35
10.2. ASB3, Switch Matrix Accessory .....................................................................................37
11. ADDITIONAL ACCESSORIES AND CABLES.....................................................................39

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1. Getting Started
This manual and the equipment it describes are for use only by qualified medical professionals
trained in the particular technique and surgical procedure to be performed.
Federal (USA) law restricts this device to sale by or on the order of a physician.
Please read all information carefully. Failure to properly follow the instructions may lead to
serious surgical consequences.
Important: This manual is designed to provide instructions for use of the AtriCure Ablation and
Sensing Unit (ASU) with the AtriCure Bipolar Handpiece (Isolatorclamp, Isolator
Transpolarpen, or CoolRaillinear pen) and AtriCure Accessory Devices (ASB1, ASB
3). It is not a reference to surgical technique.
The AtriCureASU produces and delivers RF energy, in a bipolar mode, at a frequency of
approximately 460 kHz, with a maximum output power ranging from 22.8 Watts up to 28.5 Watts
for the Isolatorclamps, 12.0 Watts up to 30.0 Watts for the IsolatorTranspolarpen or
CoolRaillinear pen devices depending on the mode of operation The AtriCureASU is
capable of producing a maximum output power of 32.5 Watts under a 100 Ohm load, although no
current AtriCureBipolar Handpiece uses power above 30 Watts. The operating mode is a
function of the handpieces or pen and is set by the ASU. The AtriCure ASU is designed to operate
only with an AtriCure Bipolar Handpiece, AtriCure Isolator Pen, or AtriCure CoolRaillinear
pen. The Footswitch is the input device used to activate RF energy delivery. Please refer to the
handpiece and pen Instructions for Use for complete description of the indications and use of these
devises.
For the user’s convenience, the AtriCure Ablation and Sensing Unit will be referred to in this
User’s Manual as the “ASU”. The AtriCure Bipolar Handpiece will be referred in this User’s
Manual as the “Handpiece”.
This User’s Manual provides a description of the ASU, its controls, displays, indicators, tones
and a sequence for its operation with the Handpiece. This User’s Manual also supplies other
information of importance to the user. This manual is intended as a User’s Manual only. Do
not operate the ASU before thoroughly reading this manual.

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1.1. System Description
As shown in Figure 1, the system is comprised of the following:
•AtriCure Bipolar Handpiece with integral cable (not shown)
•AtriCure Ablation and Sensing Unit (ASU)
•Footswitch
•Power cord.
Accessory devices are described in paragraph 10.
Figure 1 –ASU, Footswitch, and Power Cord
1.2. Unpacking
Lift the ASU, Footswitch, and Power Cord from the box and remove the protective wrapping. It is
recommended that the original shipping box and protective wrapping be saved for future storing
and/or transporting of the device.
1.3. Warnings and Precautions
The safe and effective use of RF energy is highly dependent upon factors under the control
of the operator. There is no substitute for a properly trained operating room staff. It is
important that the operating instructions supplied with the ASU be read, understood and
followed before use.

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1.3.1. WARNINGS
•Do not operate the ASU before thoroughly reading this manual.
•Do not use electrosurgical equipment unless properly trained to use it in the specific
procedure being undertaken. This manual and the equipment it describes are for use only
by qualified medical professionals trained in the particular technique and surgical
procedure to be performed.
•Do not use this device in the presence of flammable anesthetics; other flammable gases;
near flammable fluids such as skin prepping agents and tinctures; flammable objects; or
with oxidizing agents. Observe appropriate fire precautions at all times.
•Do not use this device in oxygen-enriched atmospheres, nitrous oxide (N2O) atmospheres,
or in the presence of other oxidizing agents.
•Fire Hazard: Electrosurgical accessories that are activated or hot from use can cause a fire.
Do not place them near or in contact with flammable materials (such as gauze or surgical
drapes). Avoid igniting endogenous gases.
•Fire Hazard: Do not use extension cords.
•Fire Hazard: To avoid igniting cleaning agents, use only non-flammable agents to clean
and disinfect the ASU. If flammable agents are inadvertentlyused on the ASU, allow
these substances to evaporate completely before operating.
•Contact of the Handpiece with any metal (such as hemostats, clamps, staples, etc.) can
result in unintended burn injuries.
•When not using the Handpiece, place it in a clean, dry nonconductive, and highly visible
area not in contact with the patient. Inadvertent contact by an active Handpiece with the
patient may result in burns.
•When the ASU is activated, the conducted and radiated electrical fields may interfere with
other electrical medical equipment. Refer to Section 5 for more information regarding
potential electromagnetic or other interference, and advice regarding avoidance of such
interference.
•Electrosurgery should be used with caution in the presence of internal or external
pacemakers. Interference produced with the use of electrosurgical devices can cause
devices such as a pacemaker to enter an asynchronous mode or can block the pacemaker
entirely. Consult the pacemaker manufacturer or hospital Cardiology department for
further information when use of electrosurgical appliances is planned in patients with
cardiac pacemakers.
•Trip Hazard: Standard care should be used to reduce the risk of tripping on the Footswitch
cable.
•The use of accessories, transducers and cables other than those specified in accordance
with the instructions or supplied by AtriCure, may result in increased emissions or
decreased immunity of the equipment.
•The ASU should not be used adjacent or stacked with other equipment, except for intended
stacking with AtriCure’s equipment in accordance with the instructions. The ASU normal
use configuration should be observed to verify normal operation.

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The voltage selector is factory set and should not be changed by the user. The voltage
selector and the power entry module must be set to the same voltage setting to prevent ASU
malfunction and potential instrument damage.
Electric Shock Hazard: Connect the ASU Power Cord to a properly grounded receptacle.
Do not use power plug adapters.
Electric Shock Hazard: Do not connect wet accessories to the generator.
Electric Shock Hazard: Ensure that the Handpiece is correctly connected to the ASU and
that no wires are exposed from the cable, connector or Handpiece.
1.3.2. PRECAUTIONS
•Use only with the AtriCure Handpieces intended for use with the ASU.
•Do not activate the ASU until the Handpiece is properly positioned in the patient.
•The activation tone and indicator are important safety features. Do not obstruct the
activation indicator. Ensure that the activation tone is audible to personnel in the operating
room prior to use. The activation tone alerts personnel when the Handpiece is active. Do
not disable the audible tone.
Do not remove the cover of the ASU as there is a potential for electrical shock. Refer to
authorized personnel for service.
•Use only the Footswitch provided with the ASU.
•The Power Cord of the ASU must be connected to a properly grounded receptacle.
Extension cords and/or adapter plugs must not be used.
Do not wrap instrument cable around metal objects. Wrapping cables around metal
objects may induce hazardous currents.
To avoid shock, do not allow patients to come into contact with earth metal parts of the
ASU. The use of antistatic sheeting is recommended.
•Studies have shown that smoke generated during electrosurgical procedures can be
potentially harmful to surgical personnel. These studies recommend using surgical masks
and adequately ventilating the smoke by using a surgical smoke evacuator or other means.
•When the ASU and Handpiece are used on a patient simultaneously with physiological
monitoring equipment, ensure that the monitoring electrodes are placed as far as possible
from the surgical electrodes. Be sure to position the Handpiece cables so that they do not
come in contact with the patient or the other leads.
•Needle monitoring electrodes are not recommended for use when operating the ASU and
Handpiece.
•Monitoring systems that incorporate high frequency current-limiting devices are
recommended for use with the ASU and Handpiece.

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•Failure of the ASU and Handpiece could result in unintended power output increases.
1.4. EMC Guidance and Manufacturer’s Declaration
1.4.1. Electromagnetic Requirements
The AtriCure Ablation and Sensing Unit (ASU) has been tested and found to
comply with the limits for medical devices in IEC 60601-1-2:2007. These limits
are designed to provide reasonable protection against harmful interference in a
typical medical installation.
The ASU can radiate radio frequency energy and, if not installed, used, and
serviced in accordance with electromagnetic compatibility information provided in
the instructions, may cause harmful interference to other devices in the vicinity.
Portable and mobile RF communications equipment can also affect ASU
performance and care should be taken to minimize such interference. However,
there is no guarantee that interference will not occur in a particular installation.
If the ASU does cause harmful interference to other devices, which can be
determined by turning the ASU off and on, the user is encouraged to try to correct
the interference by one or more of the following measures:
•Reorient or relocate the receiving device.
•Increase the separation between the ASU and the other devices.
•Connect the ASU into an outlet on a circuit different from that to which the
other device(s) are connected.
•Contact the AtriCure service representative for help.
1.4.2. Electromagnetic Emissions
Guidance and manufacturer’s declaration – electromagnetic emissions
The AtriCure Ablation and Sensing Unit (ASU) is intended for use in the electromagnetic environment specified
below. The customer or the user of the ASU unit should assure that it is used in such an environment.
Emissions test
Compliance
Electromagnetic environment –guidance
RF emissions CISPR 11
Group 1
The ASU unit 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 A
The ASU unit is suitable for use in all establishments other
than domestic and those directly connected to the public
low-voltage power supply network that supplies buildings
used for domestic purposes.
Harmonic emissions IEC
61000-3-2
Class A
Voltage fluctuations/ flicker
emissions IEC 61000-3-3
Complies

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1.4.3. Electromagnetic Immunity
Guidance and manufacturer’s declaration – electromagnetic immunity
The AtriCure Ablation and Sensing Unit (ASU) is intended for use in the electromagnetic environment specified
below. The customer or the user of the ASU unit should assure that it is used in such an environment.
IMMUNITY test
IEC 60601 test level
Compliance level
Electromagnetic environment –
guidance
Electrostatic
discharge (ESD) IEC
61000-4-2
± 6 kV contact
± 8 kV air
± 6 kV contact
± 8 kV air
Floors should be wood, concrete, or
ceramic tile. If floors are covered with
synthetic material, the relative
humidity should be at least 30 %.
Electrical fast
transient/burst
IEC 61000-4-4
± 2 kV for power
supply lines
± 1 kV for input/output
lines
± 2 kV for power
supply lines
± 1 kV for input/output
lines
Mains power quality should be that of
a typical commercial or hospital
environment.
Surge
IEC 61000-4-5
± 1 kV line(s) to line(s)
± 2 kV line(s) to earth
± 1 kV 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 s
<5 % UT
(>95 % dip in UT)
for 0,5 cycle
40 % UT
(60 % dip in UT)
for 5 cycles
70 % UT
(30 % dip in UT)
for 25 cycles
<5 % UT
(>95 % dip in UT)
for 5 s
Mains power quality should be that of
a typical commercial or hospital
environment. If the user of the ASU
unit requires continued operation
during power mains interruptions, it is
recommended that the ASU unit 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.

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1.4.4. EMC Guidance and Manufacturer’s Declaration
Guidance and manufacturer’s declaration – electromagnetic immunity
The AtriCure Ablation and Sensing Unit (ASU) is intended for use in the electromagnetic environment specified
below. The customer or the user of the ASU should assure that it is used in such an environment.
IMMUNITY
test
IEC 60601 TEST
LEVEL
Compliance
level
Electromagnetic environment –guidance
Conducted RF
IEC 61000-4-6
3 Vrms
150 kHz to 80 MHz
3 Vrms
Portable and mobile RF communications equipment
should be used no closer to any part of the ASU,
including cables, than the recommended separation
distance calculated from the equation applicable to the
frequency of the transmitter.
Recommended separation distance
d = 1.2 √P
Radiated RF IEC
61000-4-3
3 V/m
80 MHz to 2.5 GHz
3 V/m
d = 1.2 √P 80 MHz to 800 MHz
d = 2.3 √P 800 MHz to 2.5 GHz
where P is the maximum output power rating of the
transmitter in watts (W) according to the transmitter
manufacturer and d is the recommended separation
distance in meters (m).
Field strengths from fixed RF transmitters, as
determined by an electromagnetic site survey,ashould
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 ASU is used exceeds the
applicable RF compliance level above, the ASU should be observed to verify normal operation. If abnormal
performance is observed, additional measures may be necessary, such as re-orienting or relocating the ASU.
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.

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1.4.5. Recommended Separation Distance
Recommended separation distances between portable and mobile RF communications equipment
and the AtriCure Ablation and Sensing Unit
The AtriCure Ablation and Sensing Unit (ASU) is intended for use in an electromagnetic environment in which
radiated RF disturbances are controlled. The customer or the user of the ASU can help prevent electromagnetic
interference by maintaining a minimum distance between portable and mobile RF communications equipment
(transmitters) and the ASU as recommended below, according to the maximum output power of the communications
equipment.
Rated maximum
output power of
transmitter W
Separation distance according to frequency of transmitter m
150 kHz to 80 MHz
d = 1.2 √P
80 MHz to 800 MHz
d = 1.2 √P
800 MHz to 2.5 GHz
d = 2.3 √P
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 meters
(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.
1.5. Responsibility of the Manufacturer
AtriCure is responsible for safety, reliability, and performance of the equipment only if:
•Installation procedures in this manual are followed.
•Persons authorized by AtriCure carry out modifications or repairs.
•The electrical installation of the relevant room complies with local codes and regulatory
requirements such as IEC and BSI.
•The equipment is used in accordance with the AtriCure User’s Manual.

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2. The AtriCure Ablation and Sensing Unit (ASU)
This section provides a detailed description of the ASU including its function and operating
features.
2.1. Device Description
The AtriCureASU produces and delivers RF energy, in a bipolar mode, at a frequency of
approximately 460 kHz, with a maximum output power ranging from 12 Watts up to 30 Watts
depending on the operating mode. The AtriCureASU is capable of producing a maximum
output power of 32.5 Watts under a 100 Ohm load although no current AtriCureBipolar
Handpiece uses power above 30 Watts. The operating mode is a function of the handpiece and is
set by the ASU. The AtriCure ASU is designed to operate with the AtriCure Handpiece. The
ASU and Handpiece are designed for use without a neutral electrode. The Footswitch is the
input device used to activate RF energy delivery.
2.2. ASU Front Panel –Illustration and Nomenclature
An illustration of the ASU front panel is shown in Figure 2, below.
Figure 2 –ASU Front Panel
1. Tissue Conductance/ Power Graph Display
6. Transmurality Indicator
2. Ready Indicator
7. Fault Indicator
3. RF ON Indicator
8. Power Indicator
4. Temperature Display
9. Handle
5. Handpiece Receptacle
10. Handle Adjustment Knobs

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Front Panel Displays
There are two displays on the front panel of the ASU: the Tissue Conductance / Power
Graph Display and the Temperature Display. These two displays are described below.
Display
Description
Tissue Conductance Graph Display –Isolator
clamp (Default):
During the ablation cycle the ASU displays a
graph of tissue conductance (Current/Voltage)
versus Time. The y-axis is Tissue Conductance
and the x-axis is Time.
When the Footswitch is disconnected or
reconnected, the display of the tissue
conductance graph is not affected. Refer to
Section 4.4.3.
Power Graph Display –IsolatorTranspolar
pen or CoolRail™ linear pen:
During the ablation cycle the ASU displays a
graph of power (Current Voltage) versus Time.
The y-axis is Power and the x-axis is Time.
When the Footswitch is disconnected or
reconnected, the display of the power graph is not
affected. Refer to Section 4.4.3.
Temperature Display –This 3-digit LED display
shows the temperature at the thermocouple,
located near the outer edge of the upper jaw
1.3 mm from the electrode. Temperature is
measured and displayed in real-time, whenever
the Isolatorclamp is connected. Functionality
can be quicklyverified when the handpiece is
plugged in by confirming that the temperature
reading is of room temperature.
When the Isolatorclamp or the footswitch is
disconnected the temperature display becomes
blank. Refer to Section 4.3.
If a Handpieces does not have a thermocouple,
the temperature display will only show “- - -”.

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Front Panel Indicators
Indicator
Description
POWER Indicator –A Green LED indicates
that the AC power is present and the
ASU has been switched on.
FAULT Indicator –This Red lamp indicates
that a fault has occurred and requires
that the power be cycled.
READY Indicator –This Green lamp indicates
that the Footswitch and Handpiece are
connected and the ASU is ready for
use
RF ON Indicator –A Blue LED indicates that
RF power is being output to the
Handpiece.
The RF power output is initiated by
pressing the Footswitch.
TRANSMURALITY Indicator –A Blue
flashing LED indicates that the
Transmurality Algorithm has been
satisfied indicating that the user may
terminate the ablation cycle.
Front Panel Receptacle
Receptacle
Description
HANDPIECE or ASU Accessory Receptacle
This 12-pin receptacle accepts the
AtriCure Handpiece or connection
cable to an accessory device. This
connection is patient-isolated.

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2.3. ASU Rear Panel –Illustration and Nomenclature
An illustration of the ASU rear panel is shown in Figure 3, below.
Figure 3 –ASU Rear Panel
1. Data Port
5. Equipotential Ground Stud
2. Speaker Volume Control
6. Input Voltage Selector Switch
3. Power Entry Module
7. Footswitch Receptacle
4. Fuse Box
8. Service Access

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Rear Panel Functions
Graphic
Description
Equipotential Ground Stud –Provides a means of
securely linking the earth grounds of the
AtriCure ASU to other grounded
equipment.
Data Port –For manufacturing and test purposes.
Power Entry Module –This module contains both
the ON/OFF switch and the fuses. The
voltage is selected by the orientation of
the fuse drawer as marked.
Fuse Box –The Fuse Box contains fuses selected for
the input voltage. See Technical
Specifications in Section 7 of this manual.
Input Voltage Selector Switch –The input voltage
selector switch is pre-set at the factory to
either 110V or 220V and should not be
adjusted by the operator. This setting
should only be adjusted by the
manufacturer or by an authorized service
representative.
Speaker Volume Control –The audible volume
level is adjustable via a rotary dial.
The ASU includes a speaker for
producing audible feedback to the user.
Footswitch Receptacle –This receptacle accepts
the Footswitch connector. The single
momentary actuation pedal provides for
the activation of RF power output.
Service Access –For manufacturing and test
purposes.

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3. Installing the ASU
Inspect the ASU for any signs of physical damage to the front panel, chassis or cover.
NOTE: If any physical damage is found, DO NOT USE THE UNIT. CONTACT AtriCure
for a replacement.
All returns must be approved by AtriCure.
3.1. Transporting the ASU
The handle may be used to carrythe ASU. To change the positioning of the handle, depress both
handle adjustment knobs simultaneously and move the handle to the desired location. Do not
change the handle position when a Handpiece or Accessory Device is connected to the Handpiece
receptacle.
3.2. Adjusting the Viewing Angle
To change the viewing angle of the ASU Conductance Graph Display, adjust the handle position
using the directions in Section 3.1., above.
3.3. Preparing the ASU For Use
The ASU may be placed on a mounting cart or on any sturdy table or platform. It is recommended
that carts have conductive wheels. Refer to hospital procedures or local codes for detailed
information.
Provide at least four to six inches of space around the sides and top of the ASU for convection
cooling. Under continuous use for extended periods of time, it is normal for the top and rear panel
to be warm.
3.4. Power Cord
The ASU is shipped with an approved hospital grade power cord.
Plug the ASU into a grounded receptacle.
NOTE: Do not use extension cords or three-prong to two-prong adapters. The Power Cord
assembly should be periodically checked for damaged insulation or connectors.

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3.5. Connecting and Disconnecting the Handpiece
Connect the Handpiece directly to the ASU. Insert the Handpiece cable connector into the
receptacle on the front panel of the ASU, ensuring that the arrow symbol on the connector is
facing upward and oriented to the arrow symbol on the ASU receptacle.
NOTE: Typically, you will connect the Handpiece to the ASU when the ASU has been
powered up and is in STANDBY operating mode (see Section 4.2 regarding the
STANDBY mode). However, the Handpiece may be connected when powered up, or
prior to powering up the ASU.
NOTE: Once you have connected the Handpiece, it cannot be disconnected from the ASU by
pulling on the cable. To disconnect the Handpiece, pull back on the cable connector
body and remove it from the ASU receptacle.
NOTE: Refer to the Handpiece instruction sheet for more detailed information about
connecting the Handpiece to the ASU in a sterile environment.
3.6.Installing the Footswitch
3.6.1. Inspect the Footswitch
Inspect the Footswitch for anysigns of physical damage to the cable and connector. If
physical damage is found or the Footswitch does not perform within specification, notify
AtriCure. All returns must have approval from AtriCure.
3.6.2. Connecting and Disconnecting the Footswitch
With the connector alignment arrow in the 12 o’clock position, push the Footswitch
Connector into the Footswitch Receptacle on the rear panel of the ASU, shown in the
Figure 4.
NOTE: Typically, you will connect the Footswitch to the ASU when the ASU has been
powered up and is in STANDBY operating mode (see Section 4 regarding the
STANDBY mode). However, the Footswitch may be connected when powered up, or
prior to powering up the ASU.