ConMed System 2450 User manual

ElEctrosurgical gEnErator
Service Manual

LIMITED WARRANTY
For a period of two years following the date of delivery,
CONMED Corporation warrants the CONMED System
2450™ Electrosurgical Generator against any defects in
material or workmanship and will repair or replace (at
CONMED’s option) the same without charge, provided
that routine maintenance as specified in this manual has
been performed using replacement parts approved by
CONMED. This warranty is void if the product is used in
a manner or for purposes other than intended.
© 2013 CONMED Corporation
525 French Road
Utica, New York 13502-5994 USA
U.S. Patent Numbers 6,830,569 - 6,875,210 - 6,948,503 -
D552241 and other patents pending.
For Technical Service or Return Authorization Phone:
303-699-7600 / 1-800-552-0138 Extension 5274
Fax [phone]
For Customer Service or to order parts phone:
1-800-448-6506 / 315-797-8375 / Fax [phone]
or contact your CONMED Representative.
European Authorized Representative
MDSS GmbH
Schiffgraben 41
D - 30175 Hannover
Germany
The revision level of this manual is specified by the
highest revision letter found on either the inside front cover
or enclosed errata pages (if any).
Manual Number 60-2454-ENG Rev. F
Unit Serial Number_________________________________
MdSS GmbH
Schiffgraben 41
D-30175 Hannover
Germany
REPEC STERILE EO
STERILE R
STERILE A
20123
~
9083
LOT
CUT COAG

Table of Contents
& List of Illustrations
Section Title Page
1.0 General Information .................. Refer to Operator’s Manual (60-2451)
2.0 Specifications ............................. Refer to Operator’s Manual (60-2451)
3.0 Theory of Operation ......................................................................... 3-1
3.1 Mode Descriptions ...................................................................................... 3-1
3.1.1 Cut Major Modes..............................................................................................................3-1
3.1.2 Coag Major Modes ...........................................................................................................3-1
3.1.3 Bipolar Major Modes ........................................................................................................3-1
3.2 System Overview......................................................................................... 3-1
3.2.1 RF Power Supply (RFPS).................................................................................................3-4
3.2.2 RF Amplifier and Transformer ..........................................................................................3-4
3.2.3 Electrosurgical Outputs ...................................................................................................3-4
3.2.4 Activation Command Sensing .........................................................................................3-5
3.2.5 Automatic Return Monitor (A.R.M.)................................................................................3-5
3.2.6 System Controllers and Monitor .......................................................................................3-5
3.2.7 Low Voltage Power Monitoring........................................................................................3-5
3.2.8 Operator Control Panel .....................................................................................................3-5
3.2.9 Activation Tones................................................................................................................3-6
3.2.10 Activation Relay Connector...............................................................................................3-6
3.3 Optional System Configurations ................................................................. 3-6
4.0 Maintenance...................................................................................... 4-1
4.1 General Maintenance Information............................................................... 4-1
4.2 Maintenance Personnel................................................................................ 4-1
4.3 Cleaning...................................................................................................... 4-1
4.4 Periodic Inspection...................................................................................... 4-1
4.5 Periodic Performance Testing ...................................................................... 4-1
4.5.1 Chassis Ground Integrity ..................................................................................................4-1
4.5.2 Displays, Alarms and Commands......................................................................................4-1
4.5.3 Output Power ...................................................................................................................4-2
4.5.4 RF Leakage Measurement.................................................................................................4-3
4.5.5 Line Frequency Leakage....................................................................................................4-4
4.5.6 Automatic Return Monitor (A.R.M.) Check.....................................................................4-5
4.5.7 Output Coupling Capacitor Check....................................................................................4-5
4.6 System Calibration ...................................................................................... 4-6
4.6.1 Calibration Preliminaries ..................................................................................................4-6
4.6.2 Selecting the Mode to Calibrate ........................................................................................4-6
4.6.3 Calibrating a Monopolar Mode.........................................................................................4-8
4.6.4 Calibrating Bipolar Modes ................................................................................................4-8
4.6.5 Calibrating A.R.M. ...........................................................................................................4-8
4.6.6 Completing Calibration.....................................................................................................4-9
4.7 Last Fault Code Retrieval & Clear .............................................................. 4-9
4.7.1 Last Fault Code Retrieval..................................................................................................4-9
4.7.2 Clearing Last Fault Codes .................................................................................................4-9
4.8 Displaying Optional System Configuration ............................................... 4-9

Section Title Page
4.9 DACview .................................................................................................. 4-12
4.10 Troubleshooting ........................................................................................ 4-12
4.10.1 HVPS Troubleshooting Hints.........................................................................................4-14
4.11 Parts Ordering Information ...................................................................... 4-14
4.12 Assembly Breakdown/Parts Access ............................................................ 4-15
4.12.1 Top Cover Removal & Replacement ...............................................................................4-15
4.12.2 Bezel Removal & Replacement .......................................................................................4-16
4.12.3 Control/Display Board Removal & Replacement ............................................................4-16
4.12.4 Power Board Removal & Replacement............................................................................4-17
4.12.5 Power Transistor Replacement ........................................................................................4-17
4.13 Fault Codes............................................................................................... 4-18
Appx. A Schematics & BOMs .........................................................................A-1
Bill of Material: Top Assembly & Chassis......................................................................... A-1
Bill of Material: Controller PCB Assembly....................................................................... A-7
Bill of Material: Power PCB Assembly ........................................................................... A-13
Figure 3.2 System Block Diagram ........................................................................................................3-3
Figure 4.1 Calibration Procedure Flow Chart .......................................................................................4-7
Figure 4.2 DIP Switch Positions.........................................................................................................4-11
Figure A.1a Controller PCB (Top)....................................................................................................... A-7
Figure A.1b Controller PCB (Bottom) ................................................................................................ A-8
Figure A.2 Power PCB ...................................................................................................................... A-13
Table 4.1 Monopolar Cut Mode RF Output Power Accuracy...............................................................4-2
Table 4.2 Monopolar Coag Mode RF Output Power Accuracy............................................................. 4-2
Table 4.3 Bipolar Mode RF Output Power Accuracy............................................................................4-2
Table 4.4 Allowable RF Leakage Current to Ground............................................................................4-3
Table 4.5 Allowable RF Leakage Current - Inactive Monopolar Outputs ............................................4-4
Table 4.6 Allowable RF Leakage Current - Inactive Bipolar Outputs....................................................4-4
Table 4.7 Line Frequency Allowable Leakage - Inactive ........................................................................4-4
Table 4.8 Line Frequency Allowable Leakage - Active...........................................................................4-5
Table 4.9 DIP Switch Settings ............................................................................................................4-10
Table 4.10 DACview Channels ...........................................................................................................4-12
Table 4.11 Troubleshooting ................................................................................................................4-12
Table 4.12 Fault Codes .........................................................................................................................4-18
Schematic A.1a Controller PCB - Top Sheet........................................................................................ A-1
Schematic A.1b Controller PCB - Controller Sheet.............................................................................. A-2
Schematic A.1c Controller PCB - Monitor Sheet................................................................................. A-3
Schematic A.1d Controller PCB - FPGA Sheet.................................................................................... A-4
Schematic A.1e Controller PCB - DAC Sheet...................................................................................... A-5
Schematic A.1f Controller PCB - Display Sheet................................................................................... A-6
Schematic A.2a Power PCB - Power Amplifier .................................................................................... A-9
Schematic A.2b Power PCB - ........................................................................................................... A-10
Schematic A.2c Power PCB - ............................................................................................................ A-11
Schematic A.2d Power PCB - ........................................................................................................... A-12
Figure/Title Page

3-1
Theory of Operation
Section 3.0
System 2450™ functions and essential circuit information are provided in this section. This section begins
with a description of the key parameters for each mode. This is followed by an overview of how the system
functions and some key operational information for the modules within the system.
3.1 Mode Descriptions
The key functional parameters for each mode are presented here. Nominal mode specifications are provided
in section 1.2.11 of the System 2450 Operators Manual.
3.1.1 Cut Major Modes
Major Mode Minor Mode Nominal RF
Frequency
Modulation (Number of
Pulses, Nominal Time On/Off
Modulation (Normal
Frequency & Period)
Cut Pure 400 KHz None None
Blend 400 KHz 11 pulses, 28µs / 12µs 25 KHz / 40µs
Hi Blend* 400 KHz 9 pulses, 23µs / 17µs 25 KHz / 40µs
*Hi Blend can be set by a Hospital Qualified Biomedical Technician – see Section 4.8.
3.1.2 Coag Major Modes
Major Mode Minor Mode Nominal RF
Frequency
Modulation (Number of
Pulses, Nominal Time On/Off
Modulation (Normal
Frequency & Period)
Coag Standard 495 KHz Single pulse 40 KHz / 25µs
Spray 495 KHz Single pulse 20 KHz / 50µs
Standard and Spray Coag modes are fundamentally different from the Cut modes in that the resonant circuit
of the RF Amplifier and Transformer combination is excited by the energy of a single pulse, causing the reso-
nant circuit to ring until the energy is dissipated. Spray Coag provides the maximum open circuit voltage for
which the system is rated.
3.1.3 Bipolar Major Modes
Major Mode Minor Mode Nominal RF
Frequency
Modulation (Number of
Pulses, Nominal Time On/Off
Modulation (Normal
Frequency & Period)
Bipolar Macro 400 KHz None None
Micro 400 KHz None None
3.2 System Overview
Mains power is converted to electrosurgical output power through the RF Power Supply (RFPS), the RF
Amplifier, and the Transformer and Output sections of the system.
Mains power is converted to high voltage direct current power in the RFPS to supply the RF Amplifier.
This is essentially a power transformer with a power factor corrected regulator. The power factor correction
can be enabled or disabled under software control.
Pulses generated in the RF Controller are amplified to electrosurgical power and voltage levels in the RF
Amplifier and Transformer portions of the power train. Three high-voltage bipolar transistors and a single
MOSFET make up the hybrid-cascode RF Amplifier. The hybrid-cascode amplifier is a fast, high-voltage
amplifier that can be controlled by the combination of DC voltage (VBASE_PWM) and a fixed amplitude,

3-2
variable pulse width signal (RFGATE). This
amplifier is combined through a relay with either
the Monopolar output transformer or the Bipolar
output transformer to generate electrosurgical
power.
Electrosurgical power flows from the RF
Amplifier / Transformer section to the Output sec-
tion where the power is switched to the specific
electrosurgical outputs. The Output section also
has circuitry to detect activations from accessories
and the circuitry to perform the Automatic Return
Monitor (A.R.M.) function to ensure the integrity
of the dispersive electrode connection.
The power section also includes a number of out-
put voltage and current sensors that are used by
the RF Controller for control of power delivery
and by the Monitor to detect errant output condi-
tions. Windings on the Monopolar output trans-
former and the Bipolar output transformer are the
means for sensing output voltage. Separate pri-
mary-side current transformers are shared by the
bipolar and monopolar channels for control and
monitoring of the current. There are also separate
current sensors on the monopolar outputs that are
used to detect stuck output relays.
The RF Controller is a Field Programmable Gate
Array (FPGA) that generates the RFGATE and
VBASE_PWM RF Amplifier drive signals based
upon a comparison of measured parameters
and settings-based parameters. The pulse train
sequence is a settings-based parameter that is
dependent on the selected mode. Target power,
current limit, and voltage limit are all settings-
based parameters derived from a load curve that
is specific to the selected mode and front panel
power setting. The RF Controller samples
electrosurgical output current and output volt-
age from sensors at a 20 Megahertz rate and uses
these sampled values to calculate sensed current,
sensed voltage, and output power. This high sam-
ple rate allows control of the real power delivered
to the active accessory and also allows the System
2450 to rapidly adapt to changing loads. The
output current, output voltage, and output power
are compared with corresponding settings based
parameters of current limit, voltage limit, and
target power, respectively, and the RF Controller
adjusts value of VBASE_PWM in a closed-loop
fashion to control these parameters. The RF
Controller also provides fixed pulses for RFGATE
within each mode-based pulse train sequence.
The RF Monitor is a Digital Signal Processor
(DSP) that is used to monitor the system for
safety problems that can result from a variety of
conditions.
• The Monitor has independent sensors for out-
put voltage and current, which it uses to cal-
culate power for comparison with the power
that the RF Controller senses and for com-
parison with the generator power setting.
• To ensure that the correct outputs are acti-
vated, the Monitor also independently
senses current at each of the outputs, look-
ing for current flow that would indicate
electrosurgical power at outputs other than
the selected output.
• The Monitor senses the audio output to ensure
that a tone occurs whenever electrosurgical
outputs are active.
• The RF Amplifier drive signal is sensed by
the Monitor to detect improper frequencies
or improper pulse sequences for the selected
mode.
• The Monitor independently compares the
activation signal with that seen by the System
Controller to ensure that the activation signal
is consistent.
The Monitor has the capability to independently
disable the electrosurgical output if a problem is
detected.
The System Controller provides the primary con-
trol interface to the user and other outside sys-
tems, including the serial interface, the activation
relay, tone generation, and displays.
Finally, the Display accepts all user input and pro-
vides all user feedback. The Display is controlled
by the System Controller through a serial interface
and illuminates the LED display elements in a
time division multiplexed fashion; the illuminated
LED display elements are actually on less than half
the time. The Display also provides for user input
through the buttons on the control panel, includ-
ing switch de-bouncing and conditioning.
Figure 3.2 illustrates the key elements of the sys-
tem in block diagram form.

A.R.M
Indicators:
Activation & Mode
Displays
Keyboard Modes /
Power
Activation Request
System Controller
RF Controller
Monitor
RF Amp
RF Output Relays
HV Power Supply
Bip
RFHVSup
MRF H1 SN
MRF HF SN
MRF MP VSN
MRF BP VSN
M ISN
Tone Mon
HFINH
RFDRV
VBPWM
RLY DRV
RF MP VS
RF IS
PFC EN
ACT TONE
AL TONE
RS232
ACT RLY
Serial Interface
Connector
Activation Relay
Connector
Host
Bus
Patient
RF INH
RF BP VS
Mono
VARM
SPI
HVEN
Figure 3.2 System Block Diagram
3-3

3-4
3.2.1 RF Power Supply (RFPS)
The RFPS is comprised a line transformer and a
Power Factor Control (PFC) section. The PFC
converts Mains power from the transformer to
approximately 95 volts D.C. using techniques
that ensure the mains current into the supply is
sinusoidal and in phase with the mains voltage.
By doing so, RMS current and harmonic distor-
tion are reduced. Jumpers on the power board are
used to select input line voltage range. A graphic
on the power board and on the schematic indicate
which jumpers are used for each input voltage
range.
WARNING: THE RFPS VOLTAGE TAKES
SEVERAL SECONDS TO DECAY AFTER
THE POWER IS SWITCHED OFF. TO
WARN THE SERVICE TECHNICIAN, A
RED LED (DS1) ON THE POWER BOARD
INDICATES WHEN VOLTAGE IS STILL
ON THE BOARD.
The System Controller can enable or disable the
PFC section of the RFPS. The PFC is normally
enabled during operation to ensure a resistive load
is presented to the Mains.
In addition to the RFPS winding, there is also
another secondary winding on the Mains trans-
former that is rectified and filtered to provide
unregulated +25VDC voltage as the input for a
+12V switching regulator. The +12V output is
then used to supply input voltage to a variety of
low-voltage regulators on the controller board.
3.2.2 RF Amplifier and Transformer
The RF Amplifier and Transformer portions use
a switch-mode resonant hybrid-cascode ampli-
fier to convert the power from the RFPS to the
RF energy necessary for electrosurgery. One may
think of the amplifier as a high-speed switch that
pulses current through a resonant circuit, which is
formed by the monopolar or bipolar transformer
together with capacitors that are connected to
the transformer primary and secondary wind-
ings. The transformers are designed with a good
deal of leakage inductance in order to provide
inductance for resonating with the capacitors.
One Metal-Oxide-Semiconductor Field Effect
Transistor (MOSFET) is connected in series with
three parallel bipolar transistors to provide the
switching. The pulses to drive the gate on the
MOSFET in this arrangement come from the RF
Controller (RFGATE). The base connections of
the three parallel bipolar transistors are also driven
by a signal that originates from the RF Controller
(Vbase_PWM).
The RFGATE drive pulses provide the basic pulse
pattern that is used to form the electrosurgical
waveform, and have a set pulse-pattern and pulse-
width for each mode. A drive of several pulses
at a frequency that closely matches the resonant
frequency of the amplifier characterize Cut and
Blend modes, and the output pulses substantially
correspond to the drive. Spray and Standard
Coag modes, however, are characterized by pulses
that occur less frequently where the amplifier is
allowed to “ring” at its resonant frequency.
Rapid regulation of the output power in this
arrangement is provided by VBASE_PWM; as
VBASE_PWM is increased, the output power
increases. As noted in the RF Controller dis-
cussion, the RF Controller compares the out-
put power with the desired power and adjusts
the VBASE_PWM to minimize the difference.
VBASE_PWM enters the amplifier as a 312 KHz
Pulse-Width-Modulated (PWM) signal that is fil-
tered to become a variable DC base drive signal.
Finally, the RF Amplifier and Transformer provide
capabilities for sensing RF output current and
voltage. The voltage sensors that are used for
power control and power monitoring are indepen-
dent windings on the output transformers. The
current is also measured on the primary side of
the transformers. With proper characterization of
the transformer, the controller obtains an accurate
representation of the voltage, current, and thus the
output power of the system.
3.2.3 Electrosurgical Outputs
Relays are provided to isolate electrosurgical out-
puts and select which outputs are active. The
System Controller selects the appropriate output
relays based upon activation command inputs.
The Monitor utilizes current sensors implemented
on each monopolar electrosurgical output to
determine whether current is flowing only to the
correct outputs. In the event that current flows
in an output that is not selected, the Monitor can
independently disable RF. The monitor uses the
bipolar primary voltage to sense that the bipolar
relay has been activated.

3-5
3.2.4 Activation Command Sensing
Each of the Hand Controlled Accessory recep-
tacles incorporate inputs that are used to sense
an activation command from the user. Each
monopolar hand controlled accessory receptacle
has an input for Cut and an input for Coag. The
bipolar receptacle incorporates a single activation
input. Each of these five inputs is isolated from
the other electrosurgical outputs and from other
low-level circuitry in the system. All are powered
by a multiple output isolated power supply. The
footswitch activation inputs on the back panel are
configured in a similar way and share one of the
isolated power supply outputs.
3.2.5 Automatic Return Monitor (A.R.M.)
The patient return connector interfaces to single
and dual dispersive electrodes using a two-pin
connector. A.R.M. circuitry uses an actively driv-
en impedance measurement circuit, which allows
the System Controller to detect the type of disper-
sive electrode connected and verify its integrity.
3.2.6 System Controllers and Monitor
Two processors and an FPGA are used for system
interface & control, RF control, and system moni-
tor functions. The RF control section consists of
a dual-channel architecture with two independent
channels where one is used exclusively for RF out-
put control and the other is used for safety moni-
toring. All of these elements are located on the
Control board, along with circuitry for interface
with the user.
• System Controller (System Microcontroller):
A dedicated Microcontroller that handles
the entire user interface, Serial Interface, and
enables/disables the power factor control sec-
tion of the RFPS using the PFC_EN signal.
The System Controller can also disable the
signal used to drive the RF Amplifier and can
terminate RF drive at any time without inter-
action from either the RF Controller or the
Monitor. The System Controller is comprised
of a standard architecture microprocessor
together with portions of the FPGA, which
provides interface logic to a variety of signals,
independent voltage regulators, a processor
supervisory reset circuit, and other interface
logic.
• RF Controller: An FPGA implementing
digital signal processing elements for control
of RF power using the VBASE_PWM and
RFGATE outputs. To reduce the effects on
the microprocessor circuits on the Control/
Display Board from RF noise at the output,
VBASE_PWM and RFGATE are both dif-
ferential mode signals running between the
Control/Display Board and the power section.
The RF Controller is capable of disabling
RF output power and putting the system
into a safe state without any interaction from
the Monitor or the System Controller. The
RF Controller independently monitors the
RF output voltage and current for control
purposes through several scaled inputs. The
RF Controller is comprised of the major por-
tion of the FPGA, together with circuitry
necessary for converting the control signals
between analog and digital form.
• RF Monitor: A DSP that is dedicated to safety
monitoring activities. The Monitor is capable
of disabling RF output power and putting the
system into a safe state without any interac-
tion from the RF Controller or the System
Controller. To ensure that the Monitor can
correctly perform its function, the Monitor is
resistively isolated from the System Controller
and the RF Controller and has independent
voltage regulation. The RF Monitor indepen-
dently monitors a variety of inputs to detect
safety problems and has control of disable
signals for RF Amplifier drive. The Monitor
is comprised of a DSP, together with circuitry
necessary for converting the signals monitored
between analog and digital form, an FPGA to
provide interface logic, independent voltage
regulators, isolation resistors and other inter-
face logic.
3.2.7 Low Voltage Power Monitoring
The low voltage power supply is monitored in
hardware and resets the processors if it is out of
range. The microprocessor supervisory device on
the Control/Display Board monitors +3.3V and
+1.8V and will reset the system should the levels
drop approximately 0.3V. The Control/Display
Board has the circuit that will reset the system
should the 3.3V supply exceed 3.6V.
3.2.8 Operator Control Panel
• Keyboard: The main operator input device
for choosing operating modes and settings is
the membrane keyboard panel. Tactile-feedback

3-6
mechanical switches allow the operator to set
modes and adjust power settings.
• Display Panel: Consists of 7-segment displays
and discrete dual colored LED’s that will display
all controls and settings. LED display elements
are illuminated in a time division multiplexed
fashion; the illuminated LED display elements are
actually on less than half the time.
3.2.9 Activation Tones
Tone is generated for all activation requests, fault
detection and changes made on the Control Panel.
The System Controller generates the tone signal
(TONE_DRV), which is amplified by a driver.
The activation tone is adjustable and controlled by
an output from the System Controller, but alarm
tones are not adjustable and are set to generate a
tone greater than 65 dB.
There is circuitry to permit the Monitor to verify
the oscillation from voltage measured across the
speaker, which provides confirmation that the
speaker is indeed generating audible tones dur-
ing activation. RF output is inhibited should the
speaker drive current be absent or too low.
3.2.10 Activation Relay Connector
There is an Accessory Relay Connector, which
provides a relay closure (SPST switch) that may
be used for activating external accessories such as
smoke evacuation units.
3.3 Optional System Configurations
An eight-position configuration dipswitch (S2),
located on the Control/Display Board Assembly
(A4) allows a qualified service technician to
change some of the factory default settings. With
the exception of the DACview switch, which is
only effective in Test Mode, the configuration dip-
switch settings are only detected when power is
initialized, so any changes to the switch positions
will not be detected until power is cycled. Each
switch is OFF in the Down position and ON in
the UP position. (The system detects changes in
the DACview switch while power is on, so it is
treated differently.) Relevant information for the
configuration dipswitches appears in Section 4.8.

4-1
Maintenance
Section 4.0
This section contains information useful in the
maintenance and repair of the System 2450.
WARNING: High voltages are present at
the connections and within the System 2450.
Maintenance personnel should take precau-
tions to protect themselves. Read the safety
summary in Section 1.1.4 of the System 2450
Operators Manual before working on the
ESU.
4.1 General Maintenance Information
Although the System 2450 has been designed
and manufactured to high industry standards, it is
recommended that periodic inspection and perfor-
mance testing be performed to ensure continual
safe and effective operation.
Ease of maintenance was a primary consideration
in the design of the System 2450. Maintenance
features of this unit include microprocessor aided
troubleshooting aids and push button calibration,
built in fault detection, circuit protection, and easy
access to circuitry while the unit is operational.
These features, coupled with the warranty, local
support, loaner equipment, factory support, toll
free phone service to the factory and available fac-
tory training ensure a minimal maintenance effort
with extensive support available.
4.2 Maintenance Personnel
Only Hospital Qualified Biomedical Technicians
or ConMed factory technicians should perform
service on the System 2450. Refer all servicing to
a Hospital Qualified Biomedical Technician.
If necessary, your CONMED sales representative
will be happy to assist you in getting your equip-
ment serviced.
4.3 Cleaning
The interior of the unit may be vacuumed or
blown out as required. The exterior of the unit
may be cleaned by wiping it with a cloth that
has been dampened (not dripping) with a mild
detergent such as Windex® or Formula 409®.
(Windex® is a registered trademark of the S.C.
Johnson Company. Formula 409® is a registered
trademark of the Clorox Company.)
4.4 Periodic Inspection
The System 2450 should be visually inspected at
least every six months. This inspection should
include checks for the following:
1) Damage to the power cord and plug.
2) Proper mating and absence of damage to the
accessory connectors.
3) Any obvious external or internal damage to
the unit.
4) Any accumulation of lint or debris within the
unit or heatsink.
5) Control Panel cuts, punctures, or dents.
4.5 Periodic Performance Testing
The System 2450 should be tested for correct
performance at least once every year. Every unit
is supplied with a serialized Production Test Data
Sheet that tabulates the results of the factory tests
that were performed on the unit. This data is
supplied so that it may be used as a reference for
subsequent tests.
Recommended periodic performance tests are
listed in the following sections.
4.5.1 Chassis Ground Integrity
Connect a standard ohmmeter between the
earth ground prong on the power plug and the
Equipotential Ground Connection. Compensate
for lead resistance. Confirm less than 0.2 ohms
resistance is measured.
4.5.2 Displays, Alarms and Commands
Perform the Preliminary Functional Test procedure
described in section 2.3.1 of the System 2450
Operators Manual to verify proper operation of
displays, alarms and commands.

4-2
4.5.3 Output Power
1) Equipment Requirements:
a) Monopolar Footswitch
b) Bipolar Footswitch
c) Commercial ESU Tester (e.g. Fluke 454A
or equivalent) with non-inductive 50
and 300 ohm loads for bipolar modes
and a non-inductive 500 ohm load for
monopolar modes.
Note: Micro Bipolar is particularly sensitive to
the load resistance. A 50 ohm load should be
used for checking power to obtain the best
results.
2) Use test leads to connect the ESU tester to
the unit’s return electrode output and the
footswitch controlled active output. Set the
Load resistance per mode as indicated in
Tables 4.1 and 4.2.
3) Perform the monopolar power tests indicated
in Tables 4.1 and 4.2. The acceptance range is
given in both Watts and Amps to accommo-
date available test equipment. It is not neces-
sary to test for both power and current.
Table 4.1 Monopolar Cut Mode RF Output Power Accuracy
Mode Load (ohms) Power Setting Watts (min) Watts (max) Amps (min) Amps (max)
Pure 500 20 17 23 0.184 0.214
500 100 90 110 0.424 0.469
500 300 270 330 0.735 0.812
Blend 500 20 17 23 0.184 0.214
500 100 90 110 0.424 0.469
500 200 180 220 0.600 0.663
Table 4.2 Monopolar Coag Mode RF Output Power Accuracy
Mode Load (ohms) Power Setting Watts (min) Watts (max) Amps (min) Amps (max)
Standard 500 20 17 23 0.184 0.214
500 50 45 55 0.300 0.332
500 120 108 132 0.465 0.514
Spray 500 20 17 23 0.184 0.214
500 50 45 55 0.300 0.332
500 80 72 88 0.379 0.420
4) Disconnect the ESU tester from the unit.
5) Use test leads to connect the ESU tester to
the Bipolar Accessory outputs.
6) Perform the bipolar power tests indicated in
Table 4.3. This table only provides the mini-
mum number of points to be tested.
Table 4.3 Bipolar Mode RF Output Power Accuracy
Mode Load (ohms) Power Setting Watts (min) Watts (max) Amps (min) Amps (max)
Macro 300 20 17 23 0.238 0.277
300 50 45 55 0.387 0.428
300 70 63 77 0.458 0.507
Spray 50 20 17 23 0.583 0.678
50 50 45 55 0.949 1.049
50 70 63 77 1.122 1.241

4-3
4.5.4 RF Leakage Measurement
NOTE: To ensure accuracy when making leak-
age measurements, perform all leakage testing
using methods and instruments that are com-
pliant with the prcedures outlined in Section
19 of IEC60601-2-2 (Particular Requirements
for the Safety of High Frequency Surgical
Equipment).
RF Leakage can present a hazard in the operating
room because electrosurgical currents can flow
to the patient and operating room staff through
unintended paths, which can cause injury. RF
leakage occurs because the total energy in the
output voltage waveform is provided with a con-
ductive path through stray parasitic capacitance
distributed within the generator and along the
length of the leads.
Table 4.4 presents the allowed RF leakage currents
to ground.
Table 4.4 Allowable RF Leakage Current to Ground
MEASURED TERMINAL ACTIVATED ACCESSORY MODE RF LEAKAGE (Ma)
Dispersive Electrode Coag Combination Monopolar Standard Coag < 100
Dispersive Electrode Cut Combination Monopolar Pure Cut < 100
Dispersive Electrode Hand Controlled Standard Coag < 100
Combination Monopolar Active Coag Combination Monopolar Standard Coag < 100
Hand Controlled Active Left Hand Controlled Standard Coag < 100
Bipolar Right Bipolar Footswitch Bipolar Macro < 67
Bipolar Left Bipolar Footswitch Bipolar Macro < 67
Equipment:
• ESU Tester with RF Leakage function -OR-
• 0-250 is RF Ammeter with a 200 ohm 10 W
Non-inductive Resistor
• Patient Plate Adapter Plug
• 2 - Test leads, 1 m max. Length
• 3 - Test leads, 10 cm max. Length
• Wooden table approximately 1 m from floor.
NOTE: Use a measuring device that meets IEC
specification for RMS measured over one second.
Procedure:
1) Ensure that the unit is fully assembled and all
fasteners are tight.
2) Place the ESU tester or meter with resistor on
the table so that they are at least 0.5m away
from the unit under test and any other con-
ductive surface.
3) Set the unit for full power for the modes
noted in the table. Connect the ESU tes-
ter in accordance with the manufacturer’s
instructions -OR- connect the 200-ohm non-
inductive resistor in series with the 250 mA
RF ammeter to the Equipotential Ground
Connection on the Rear Panel. Also make
sure there are no connections to any output
other than the one you are measuring.
WARNING: HAND CONTROL ACTIVA-
TIONS SHOULD BE KEYED USING
3” OR LESS WELL-INSULATED
JUMPER. USE OF AN INSULATING
ROD TO INSERT THE JUMPER IS
ADVISED TO PREVENT RF BURNS.
3) One at a time, connect test setup to each RF
output terminal indicated in Table 4.4 and
activate the unit using the corresponding
command. Confirm no meter readings exceed
the specified maximum. Hand controlled
Coag activations are accomplished by con-
necting a jumper between the left jack and
center jack of the desired hand switched acces-
sory jack.
RF leakage should also be measured between inac-
tive outputs and the Dispersive Electrode connec-
tion. The procedure is as follows:
1) Set the unit for full power for the modes
noted in Table 4.5. Connect the ESU tes-
ter according to manufacturer’s instructions
- OR- the 200-ohm non-inductive resistor in
series with the 250 mA RF ammeter to the
Dispersive Electrode connection on the front
panel. Also make sure there are no connec-
tions to any output other than the one you
are measuring.

4-4
2) One at a time, connect this series combination to each RF output terminal indicated in Table 4.5 and
activate the unit using the corresponding command. Confirm that no meter readings exceed the specified
maximum.
Table 4.5 Allowable RF Leakage Current - Inactive Monopolar Outputs
MEASURED TERMINAL ACTIVATED ACCESSORY MODE RF LEAKAGE (Ma)
Combination Monopolar Active Hand Controlled Standard Coag < 50
Combination Monopolar Active Bipolar Footswitched Macro < 20
Hand Controlled Active Combination Monopolar Standard Coag < 50
Hand Controlled Active Bipolar Footswitched Macro < 20
Bipolar Left Right Hand Controlled Standard Coag < 48
Finally, RF leakage should be measured between
the inactive bipolar outputs while a monopolar
accessory is activated. Do the following:
1) Set the unit for full power for the bipolar
mode noted in Table 4.6. Connect ESU tester
Table 4.6 Allowable RF Leakage Current - Inactive Bipolar Outputs
MEASURED TERMINAL ACTIVATED ACCESSORY MODE RF LEAKAGE (Ma)
Bipolar Right to Left Hand Controlled Standard Coag < 48
according to manufacturer’s instructions -OR
the 200-ohm non-inductive resistor in series
with the 250 mA RF ammeter between the
two bipolar output connections.
2) Activate and verify the limit in Table 4.6.
4.5.5 Line Frequency Leakage
CAUTION: To prevent RF current from destroy-
ing the test equipment and/or affecting leakage
readings, set all power settings to zero.
WARNING: ELECTROCUTION HAZARD.
USE OF AN ISOLATED MAINS POWER
SOURCE IS RECOMMENDED WHEN
OPENING THE MAINS GROUND
DURING THE FOLLOWING SAFETY
TESTS.
Circuit ground and Neutral (Low Mains) must be
connected together for Mains leakage testing.
Equipment:
These tests are performed most conveniently using
any good quality biomedical electrical safety tester.
Procedure:
1) Connect the electrical safety analyzer to make
the measurements indicated in Table 4.7.
2) Mode: Measure leakage for Bipolar to Neutral
and Chassis to Neutral.
Table 4.7 Line Frequency Allowable Leakage - Inactive
RF output to Neutral LINE GND LIMIT max
Equipotential Ground Normal Closed 30 µA
Equipotential Ground Reversed Closed 30 µA
Equipotential Ground Normal Open 270 µA
Equipotential Ground Reversed Open 270 µA
Dispersive Electrode Normal Closed 15 µA
Dispersive Electrode Reversed Closed 15 µA
Dispersive Electrode Normal Open 15 µA
Dispersive Electrode Reversed Open 15 µA
Bipolar Output* Normal Closed 15 µA
Bipolar Output* Reversed Closed 15 µA
Bipolar Output* Normal Open 15 µA
Bipolar Output* Reversed Open 15 µA
*Measure the Bipolar Output with Bipolar connections shorted together.

4-5
5) Since the System 2450 monopolar active out-
puts are disconnected by relays when the unit
is not activated, active-to-neutral leakage tests
must be performed with the unit activated in
order to be valid.
6) With all power controls set to zero, measure
the leakage current as in step 1 from each of
the three active output terminals to neutral;
see Table 4.8; while that output is activated
in Cut by the appropriate footswitch or hand
control jumper. Hand control cut activations
are accomplished by connecting a jumper
between the two outer jacks of where the
handcontrolled accessory is plugged into the
unit.
Table 4.8 Line Frequency Allowable Leakage - Active
RF output to Neutral LINE GND ACTIVATION LIMIT max
Combination Monopolar Active Normal Closed Combination Monopolar Cut 15 µA
Combination Monopolar Active Reversed Closed Combination Monopolar Cut 15 µA
Combination Monopolar Active Normal Open Combination Monopolar Cut 15 µA
Combination Monopolar Active Reversed Open Combination Monopolar Cut 15 µA
Hand Controlled Active Normal Closed Hand Controlled Cut 15 µA
Hand Controlled Active Reversed Closed Hand Controlled Cut 15 µA
Hand Controlled Active Normal Open Hand Controlled Cut 15 µA
Hand Controlled Active Reversed Open Hand Controlled Cut 15 µA
4.5.6 Automatic Return Monitor (A.R.M.)
Check
A.R.M. has two specific ranges that will be tested
initially and then the circuit will be tested to verify
that the circuit measures dispersive electrode resis-
tance correctly. For this testing, only a Decade
Resistance Box (DRB) and a dispersive electrode
cable adapter are required. Connect the DRB to
the Dispersive Electrode Receptacle using the dis-
persive electrode cable adapter.
A.R.M. may be reset by disconnecting the dis-
persive electrode connector or adjusting the DRB
above 10K Ohms until the Single and Dual
Dispersive Electrode Status/Alarm Indicators flash
red in alternating fashion. Allow approximately
two seconds after the DRB is changed before pro-
ceeding to the next step in the procedure. A.R.M.
indicators not mentioned in the procedure must
be off for each test.
1) Dual Electrode Alarm Limit: Set the DRB to
158 Ohms, then connect it to the Dispersive
Electrode Receptacle and verify that the
Single and Dual Dispersive Electrode Status/
Alarm Indicators flash red in alternating fash-
ion.
2) Dual Electrode Upper Limit: Set DRB to
140 Ohms and verify that the Dual Dispersive
Electrode Status/Alarm Indicator is Green.
3) Dual Electrode Lower Limit: Set the DRB
to 15 Ohms and verify the Dual Dispersive
Electrode Status/Alarm Indicator is Green.
4) Single Electrode Upper Limit: Set the DRB
to 7 Ohms, then reset A.R.M. and verify the
Single Dispersive Electrode Status/Alarm
Indicator is Green.
4.5.7 Output Coupling Capacitor Check
WARNING: ENSURE ALL POWER
SETTINGS ARE AT 0 WATTS BEFORE
CONDUCTING THIS TEST TO PREVENT
INJURY TO PERSONNEL AND DAMAGE
TO TEST EQUIPMENT.
NOTE: Not all capacitance meters will read prop-
erly for this test. The test frequency should be at
or below 1 kHz for best accuracy. The following
meters have been tried successfully: Fluke 189,
Extech 285, Sencor LC75 and HP4284A (1 kHz
setting or below).
1) Connect shorting plug to banana adapter to
the two pin Dispersive Electrode Receptacle.
Use 6” or shorter test leads to connect a
capacitance meter between the shorting plug
adapter and the footswitched ReadiPlug
Universal Accessory Receptacle.
2) Measure capacitance and confirm it is less
than 0.2 nF.

4-6
3) Confirm cut power is set to 0, then activate
and confirm capacitance is between 0.6 and
0.9 nF.
4) Do not activate for this bipolar test. Move
test leads to Bipolar Output Accessory
Receptacles. Confirm capacitance is between
2.2 and 2.5 nF.
4.6 System Calibration
The System 2450 is calibrated during manufacture
using equipment traceable to National Institute
of Standards & Technology (NIST) standards
and should retain its accuracy for a long period of
time. Recalibrate the generator after repair or if it
performs out of specification. Check the calibra-
tion in normal operating mode and only perform
calibration if errors are identified.
The System 2450 stores its calibration in nonvola-
tile semiconductor memory, so the calibration will
be retained without any action on the part of the
user or maintenance staff. Calibration should be
checked in normal operating mode during annual
preventative maintenance to ensure there is no
change.
Calibration is required when:
• “Err 138”, “Err 139”, or “Err 140” occurs:
An error is detected with the stored calibra-
tion values.
• “Err 143” or “Err 321” occurs: One or more
modes require calibration.
• “Err 135” occurs: An error is detected with
stored ARM calibration values.
• Either the Control/Display Board assembly
(Conmed P/N 61-6991) or the Power Board
assembly (Conmed P/N 61-6981) is replaced.
• Calibration differences are found during pre-
ventative maintenance.
Refer to Figure 4.1 for calibration process flow.
4.6.1 Calibration Preliminaries
System 2450 calibration occurs in Calibration
Operating Mode, which is entered by setting
the system configuration DIP switches on the
Control/Display Board. Set the Calibration sys-
tem configuration DIP switch (Control/Display
Board SW2.2) to the ON (UP) position and the
Test system configuration DIP switch (Control/
Display Board SW2.1) to the OFF (DOWN)
position. Other configuration DIP switch settings
positions will not affect this. See Section 4.8 for
system configuration DIP switch details.
With this configuration set, turn on power while
pressing and holding both Bipolar Mode Select
Keys. Release these Keys when CAL appears in
the Monopolar Cut Power Digital Display and
the software revision appears in the Monopolar
Coag Power Digital Display. CAL and the soft-
ware revision may persist in the displays for a few
seconds after the Bipolar Mode Select Keys are
released. The display will then provide an indica-
tion of the calibration status:
• “ALL” will appear in the Monopolar Cut
Power Digital Display if the calibration mem-
ory is empty.
• “nEr” will appear in the Monopolar Cut
Power Digital Display, where “n” indicates
how many major modes require calibration,
will be displayed if only particular modes
require calibration. All of the minor mode
indicators will be illuminated and the minor
modes needing calibration will flash.
• “[U”, “[0A”, “bP”, or “Pad” will appear in
the Monopolar Cut Power Digital Display to
indicate the major mode when only minor
modes under that major mode require calibra-
tion. All of the minor mode indicators will
be illuminated and the minor modes needing
calibration will flash.
• “[U” will appear in the Monopolar Cut Power
Digital Display with the Pure Cut Mode
Indicator illuminated if all modes are cali-
brated.
For all except the last of these, a single Press and
release of the Tone Loudness Adjustment Down
Key is required to proceed past this point on the
menu. After pressing this key, “[U” will appear in
the Monopolar Cut Power Digital Display with
the Pure Cut Mode Indicator illuminated.
4.6.2 Selecting the Mode to Calibrate
Press the Monopolar Cut Power Adjustment Keys
to select the major mode to calibrate as displayed
in the Monopolar Cut Power Digital Display. The
selections are “[U” for Cut, “[0A” for Coag, “Bp”
for Bipolar, or “PAd” for the Dispersive Electrode
A.R.M. connection. If any of the minor modes
under these major modes are not calibrated, the
displayed major mode will flash.
Select the monopolar minor mode by pressing the
appropriate Mode Select Key.

Calibration
[AL rxx
2Er3Er [u
[u 500 P
[0A bP PAdALL
Press Tone Loudness Adjustment Down Key
Press Cut Minor Mode
Select Key for
Pure or Blend.
Press Monopolar Cut Power Adjustment
Keys to select [u,[0A,bP and PAd.
Set the Calibration System Configuration
Dipswitch on the Controller to the ON position
Turn main power switch on while pressing both Bipolar
Mode Select Keys.
Connect indicated load
with meter to output
Activate when target level displayed.
Press Monopolar Coag Power Adjustment keys to
match power/current to Calibration Target.
Minimum activation 2 seconds, release.
[0A bP[u Pad 10
Connect 10 ohm load Two-Pin
Dispersive Electrode Receptacle
Press Tone Loudness
Adjustment Down Key
Press Tone Loudness Adjustment Down Key.
Press Tone Loudness Adjustment Down Key
Press Bipolar Power Adjustment Key
Connect 150 ohm load Two-Pin
Dispersive Electrode Receptacle.
Press Up Arrow Key
Press Bipolar Power Adjustment
Key.
PAd 150
End
Set the Calibration System Configuration
Dipswitch on the Controller to the OFF position
Release Bipolar Mode Select Keys when the
Monopolar Cut Power Digital Display indicates “ [AL”
Power off
Do NOT select Pulsed
Figure 4.1 Calibration Procedure Flow Chart
4-7

4-8
4.6.3 Calibrating a Monopolar Mode
This section applies to the Pure Cut, Blend,
Standard Coag, and Spray Coag modes.
Calibration may be performed by measuring cur-
rent or by measuring power. To select between
calibration using measured current and measured
power, press the Bipolar Power Adjustment Keys
to set the calibration units to either “A” for current
or “P” for power.
The resistance to be used for calibration will
appear in the Monopolar Coag Power Digital
Display. Connect a resistor of this value between
the output connection that is being used for cali-
bration and both pins on the Two-Pin Dispersive
Electrode Receptacle.
Press and release the Tone Loudness Adjustment
Down Key to begin calibration. After this key is
pressed, the target level appears in the Monopolar
Coag Power Digital Display.
Activate using the appropriate Handswitch or
Footswitch. Power will now flow to the resis-
tor. While monitoring either the current or the
power, adjust the power up or down using the
Monopolar Coag Power Adjustment Keys until
the measured value is as close to the target level
as possible. The activation must be maintained
for a minimum of 2 seconds to ensure the calibra-
tion is valid. After the power is properly adjusted,
release the activation. Press and release the Tone
Loudness Adjustment Down Key to complete the
calibration sequence for the selected minor mode.
*Blend mode only: Both the default Lo Blend
mode and the optional Hi Blend mode must be
calibrated. After Lo Blend is calibrated, the sys-
tem will return to the step where the target power
is displayed for Hi Blend calibration. Note that
the target value for Hi Blend is different from
the target value for Lo Blend. To complete the
Hi Blend calibration, activate again using the
appropriate Handswitch or Footswitch. Power
will now flow to the resistor. While monitoring
either the current or the power, adjust the power
up or down using the Monopolar Coag Power
Adjustment Keys until the measured value is as
close to the target level as possible. The activa-
tion must be maintained for a minimum of 2 sec-
onds to ensure the calibration is valid. After the
power is properly adjusted, release the activation.
Press and release the Tone Loudness Adjustment
Down Key to complete the Hi Blend calibration
sequence.
After a minor mode has been calibrated, the
associated minor mode indicator will quit flash-
ing. When all of the minor modes within a major
mode have been calibrated, the major mode
indicated in the Monopolar Cut Power Digital
Display will quit flashing.
4.6.4 Calibrating Bipolar Modes
The Bipolar modes are calibrated using a method
that is very similar to the Monopolar modes.
Calibration may be performed by measuring cur-
rent or by measuring power. To select between
calibration using measured current and measured
power, press the Bipolar Power Adjustment Keys
to set the calibration units to either “A” for current
or “P” for power.
The resistance to be used for calibration will
appear in the Monopolar Coag Power Digital
Display. Connect a resistor of this value between
the two active connections in the Bipolar
Accessory Receptacle.
Press and release the Tone Loudness Adjustment
Down Key to begin calibration. After this key is
pressed, the target level appears in the Monopolar
Coag Power Digital Display.
Activate using the Bipolar Footswitch. Power
will now flow to the resistor. While monitoring
either the current or the power, adjust the power
up or down using the Monopolar Coag Power
Adjustment Keys until the measured value is as
close to the target level as possible. The activation
must be maintained for a minimum of 2 seconds
to ensure the calibration is valid. After the power
is properly adjusted, release the activation. Press
and release the Tone Loudness Adjustment Down
Key to complete the calibration sequence for the
bipolar mode.
After a Bipolar minor mode has been calibrated,
the associated Bipolar minor mode indicator will
quit flashing. When all of the Bipolar minor
modes have been calibrated, the major mode
indicated in the Monopolar Cut Power Digital
Display will quit flashing.
4.6.5 Calibrating A.R.M.
A.R.M. is calibrated against a pair of known resis-
tances.
Press and release the Tone Loudness Adjustment
Down Key to begin calibration. The resistance
to be used for calibration will appear in the
Monopolar Coag Power Digital Display. Connect

4-9
a resistor of this value ±1% between the two
active connections in the Two-Pin Dispersive
Electrode Receptacle.
Calibrate the particular value connected by press-
ing one of the Bipolar Power Adjustment Keys.
When the value is accepted, a two-tone sequence
will sound and the resistance in the Monopolar
Coag Power Digital Display will quit flashing.
Now scroll to the other of the pair of known
resistances using the Monopolar Coag Power
Adjustment Keys. The resistance to be used for
calibration will appear in the Monopolar Coag
Power Digital Display. Connect a resistor of this
value ±1% between the two active connections in
the Two-Pin Dispersive Electrode Receptacle.
Calibrate the particular value connected by again
pressing one of the Bipolar Power Adjustment
Keys. When the value is accepted, a two-tone
sequence will sound and the resistance in the
Monopolar Coag Power Digital Display will quit
flashing.
Press and release the Tone Loudness Adjustment
Down Key to complete A.R.M. calibration.
After A.R.M. has been calibrated, the major mode
“PAd” indicated in the Monopolar Cut Power
Digital Display will quit flashing.
4.6.6 Completing Calibration
Turn power off and set the Calibration system
configuration DIP switch (Control/Display
Board SW2.2) to the OFF (DOWN) position.
See Section 4.8 Displaying Optional System
Configuration for system configuration DIP
switch details. The ESU will be ready for normal
operation the next time the power is turned on.
4.7 Last Fault Code Retrieval & Clear
Up to 50 error (Err) and accessory (A[[) codes
can be stored in memory for retrieval. When
retrieving the error codes, it is also possible
to retrieve the system settings when the error
occurred.
4.7.1 Last Fault Code Retrieval
1) Turn on power while pressing and holding
both Bipolar Mode Select Keys. Release these
Keys when LF[ appears in the Monopolar
Cut Power Digital Display and the software
revision appears in the Monopolar Coag
Power Digital Display. LF[ and the soft-
ware revision may persist in the displays for
a few seconds after the Bipolar Mode Select
Keys are released. This action will place the
system in the Last Fault Code Mode (LFC).
Electrosurgical outputs cannot be activated
while the system is in LFC.
2) If any errors are stored in memory, the Cut
Window will next display “Err”; the Coag
window will display the error code (a numeric
value); and the Bipolar Window will display
the storage location of that error code.
Last Fault display example:
Err 381 1
3) Scroll through the stored error codes using
the Bipolar Power Adjustment Keys. The
error codes are stored Last in, First out. A “1”
in the Bipolar Display shows the last error
that occurred. Press the Bipolar Up key and
a “2” will be displayed if more than one error
occurred.
4) To retrieve the settings when the error
occurred, it is necessary to have a
Handcontrol accessory connected. Press both
Cut and Coag activation switches and the
Display Panel will show the system settings
when the error occurred.
4.7.2 Clearing Last Fault Codes
As errors occur, fault codes from earlier errors are
erased in a last-in-first-out fashion. While it is not
absolutely necessary to clear the older codes, clear-
ing the codes may be desirable in some situations.
• Pressing the Monopolar Cut Power
Adjustment down Key followed by the
Tone Loudness Adjustment Down Key will
clear the entire fault code memory. The cut
window will display “[Lr” when codes are
cleared.
• Pressing the Tone Loudness Adjustment Down
Key again will display the optional system
configuration settings.
4.8 Displaying Optional System
Configuration
The optional system configuration DIP switch
settings can be checked without removing the top
cover.
• Access Last Fault Code retrieval as described in
the preceding section.

4-10
• Press the Tone Loudness Adjustment Down
Key again and the configuration DIP switch
settings will be displayed. “0” is for OFF and
a “1” is for ON.
The eight-position configuration DIP switch (S2),
located on the Control/Display Board Assembly
allows a qualified service technician to change
some of the factory default settings. The default
switch is only read during Power on Self Test
(POST) or when the system is powered on, so
any changes to the switch positions should be
made with the main power off. Each switch is
OFF in the down position and ON in the up
position. Relevant information for each switch is
described in Table 4.9 and the positions are illus-
trated in Figure 4.2.
Table 4.9 DIP Switch Settings
Config.
Switch
Position
Title / Display
Element
Default Description for
Off
Description for On
1TEST / Cut 100’s Off Run Mode.
Required position
for surgery.
Activates Test Mode, which inhibits most
of the system level monitoring for trouble-
shooting purposes. When this switch is
ON, both Bipolar Mode Select Keys on
the Display Panel must be pressed until
888 appears in the Monopolar Cut Power
Digital Display and the software revision
appears in the Monopolar Coag Power
Digital Display. 888 and the software revi-
sion may persist in the displays for a few
seconds after the Bipolar Mode Select Keys
are released. If both Bipolar Mode Select
Keys are not pressed, and Err 100 is dis-
played and the power must be cycled.
2CAL/ Cut 10’s Off Run Mode.
Required position
for surgery.
Required for calibration of output power
and A.R.M. When this switch is ON,
both Bipolar Mode Select Keys on the
Display Panel must be pressed until [AL
appears in the Monopolar Cut Power
Digital Display and the software revision
appears in the Monopolar Coag Power
Digital Display. [AL and the software revi-
sion may persist in the displays for a few
seconds after the Bipolar Mode Select Keys
are released. If both Bipolar Mode Select
Keys are not pressed, and Err 100 is dis-
played and the power must be cycled.
3SCOAG / Cut 1’s On Allows activation
of only one acces-
sory at a time
in Coagulation
modes.
Allows simultaneous activation of two
accessories for Coagulation modes.
4DCUT / Coag
100’s
Off Allows activation
of only one acces-
sory at a time in
Cut modes.
Allows simultaneous activation of two
accessories for Cut modes.