MERCIAN Micro Torque MT5000 Instruction Manual

Micro Torque MT5000
Surgical Drill System
OPERATING
INSTRUCTION
MANUAL
Surgical Instruments of Excellence

PRODUCT RANGE
For more than 50 years Mercian has been committed to supplying high quality surgical Instruments
for the UK Hospitals, our motto is ‘Surgical Instruments of Excellence’ - our product range includes:
• Spinal Instruments
• Hand Surgery Instruments
• Micro Surgery Instruments
• Cardiac and Vascular Instruments
• Endoscopic Instruments
• Easy Cut Scissors
• Motor Line Products
• Surgeons Operating Chairs
• Shoulder Instruments
SERVICE CONTACT NUMBERS
We have an experienced sales team who can discuss our product range and offer advice and sup-
port. Please contact us at:
Mercian Surgical Supply Co Ltd.,
10, Topaz Business Park,
Topaz Way,
Bromsgrove,
Worcestershire,
B61 0GD,
UK.
Tel: [phone]
Fax: [phone]
Email: [e-mail]
Web: www.merciansurgical.com
Accreditations: ISO 13485:2016 | Directive 93/42/EEC | MDR 2017/745
Surgical Instruments of Excellence
Micro Torque MT5000
Revision 3 - May 2021

Surgical Instruments of Excellence
Micro Torque MT5000
CONTENTS
PAGE
SAFETY PRECAUTIONS .......................................................................................................................................2
1 INTRODUCTION ............................................................................................................................................3
1.1 Operating Conditions............................................................................................................................3
1.2 Intended Use...........................................................................................................................................4
2 COMPONENTS..............................................................................................................................................4
3 PREPARING FOR USE.................................................................................................................................5
4 INSTALLING THE STERILE IRRIGATION TUBING IN TO THE PUMP UNIT ..................................
ON THE CONSOLE.......................................................................................................................................7
5 CONTROL UNIT FUNCTION AND DISPLAY..........................................................................................8
6 USING THE CONSOLE UNIT FUNCTIONS............................................................................................9
6.1 Using and Setting the ‘Pre Set’ Function .......................................................................................9
6.2 Adjusting the Speed of the ‘Micro Motor’ ....................................................................................10
6.3 Setting the Irrigation Functions on the Display ...........................................................................11
6.4 Forward and Reverse Settings on the Display............................................................................12
6.5 Set up Menu function .......................................................................................................................13
7 FUNCTIONS AND OPERATION OF THE FOOT CONTROL ............................................................15
8 REPLACING FUSES ON THE UNIT........................................................................................................16
9 SERVICE AND REPAIRS............................................................................................................................16
10 DISCONNECTING THE ‘MICRO MOTOR’ FROM THE HANDPIECE ............................................17
11 LUBRICATION, DISINFECTION AND CLEANING...............................................................................17
11.1 Console Unit .......................................................................................................................................17
11.2 Foot Control ........................................................................................................................................17
11.3 Maintenance Procedure ‘Micro Motor’ and Handpieces .........................................................17
12 TECHNICAL DATA...................................................................................................................................... 20
12.1 Control Unit ........................................................................................................................................ 20
12.2 Foot Control ....................................................................................................................................... 20
12.3 ‘Micro Motor’...................................................................................................................................... 20
12.4 Motor Cable ....................................................................................................................................... 20
13 TROUBLE SHOOTING ...............................................................................................................................21
14 GUARANTEE CONDITIONS .................................................................................................................... 22
15 INFORMATION LABEL.............................................................................................................................. 23
APPENDIX 1
EMC Information
Special instructions regarding electromagnetic compatibility
Electromagnetic instructions
Electromagnetic immunity
APPENDIX 2
EMC and Safety Certificates
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SAFETY PRECAUTIONS
• READ this manual and familiarise yourself fully with this equipment before use.
• The unit must be at REST when attaching or replacing cutting burs.
• NEVER touch the cutting bur when ‘Micro Motor’ is in motion.
• Handpieces must only be fitted or replaced when ‘Micro Motor’ is NOT running.
• DO NOT allow any modifications on the Micro Torque System.
• If the ‘Micro Motor’ emits an unusual noise during operation STOP using immediately.
• Pay particular attention to the operating temperature of the Handpiece if the over heating is
suspected STOP using immediately as this can be hazardous to the patient.
• Only use COMPATIBLE Handpieces on the ‘Micro Motor’ complying to DIN13940/ISO 3964.
• Should only be used by staff with the required knowledge and training for surgical procedures.
• To avoid the risk of electric shock this equipment must be connected to a mains supply with a
protective earth.
• Risks of reciprocal interference posed by medical equipment during specific investigations or
treatments.
• To safely terminate use of unit - switch off with mains switch on rear of unit.
• Do not touch the front contacts and the patient at the same time.
• There are no potential hazards when disposing of this equipment other than when disposing
of any electronic equipment.
Environmental exclusions;
• This equipment is only to be used in a professional healthcare environment.
• Portable RF communications equipment (including peripherals such as antenna cables
and external antennas) should be used no closer than 30cm/12” to any part of the MT5000
including cables specified by the manufacturer. Otherwise, degradation of the performance of
this equipment could result.
NOTE: The EMISSIONS characteristics of this equipment make it suitable for use in industrial
areas and hospitals (CISPR 11 class A). If it is used in a residential environment (for which
CISPR 11 class B is normally required) this equipment might not offer adequate protection to
radio-frequency communication services. The user might need to take mitigation measures,
such as relocating or re-orienting the equipment.
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Micro Torque MT5000
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1 INTRODUCTION
The MT5000 system provides highly efficient and reliable operation and is manufactured to
the highest quality standards. The high performance self ventilating brushless DC ‘Micro
Motor’ drives precision surgical Handpieces at the optimum speed for the procedure being
undertaken.
The ‘Micro Motor’ speed is set on the easy to use Control Console in increments up to a
maximum speed of 40,000 rpm. Forward and reverse operation of the ‘Micro Motor’ is also
selectable on the Console.
The Control Console drives a peristaltic irrigation pump. The pump delivers a sterile water
flow through an external sterile tubing direct to the cutting bur. Simple to operate controls for
setting pump flow rate in increments up to 100% are provided on the Console.
The Control Console has 2 selectable ‘Programmes’ and a dedicated ‘Set up’ function button.
There is also a memory feature that stores the last setting before the machine is switched off
and recalls these final settings when switched back on again.
The ‘Micro Motor’ is operated by the Foot Control. Depressing the central pedal controls the
‘Micro Motor’ speed (up to the maximum figure set on the Console). There are two switches;
one selects forward and reverse operation of the ‘Micro Motor’ and the other toggles the
irrigation pump ON and OFF.
The maximum delivery of torque is delivered in the highest speed range. The highest torque
can be obtained by running the ‘Micro Motor’ at the highest speed when fitted with compatible
Handpiece attachments that have integral reduction gears. This combination will reduce the
operating speed of the instrument but maintain the optimal torque.
The ‘Micro Motor’ and Cable are designed to be sterilised in an autoclave at 134°C. See page
17 for details of Lubrication, Disinfection and Cleaning procedures.
Refer to the relevant sections of these operating instructions for detailed operating information.
A technical specification is provided on page 20 of these instructions.
1.1 Operating Conditions
• Room Temperature: 10 to 25°C / 50 to 77°F
• Relative Air Humidity: 50 to 70%
• Relative Air Pressure: 900 to 1200 hPa
• Storage and Transport -10 to 40ºC / 14 to 104ºF
Conditions
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Micro Torque MT5000

1.2 Intended Use
The intra coupling used on the Micro Torque MT5000 motor system is designed for use with
hand held surgical Handpiece attachments that comply with DIN 13940/ISO 3964. Different
attachments are available depending on the application. Some typical procedures and
applications are shown below;
• Sectioning Teeth
• Drilling and Polishing Bone or Enamel
• Sawing Bone
• Trephining Bone
2 COMPONENTS
ITEM CODE DESCRIPTION ITEM CODE DESCRIPTION
1 MT5010-00 Electronic Console Unit 5 MT5012-00 ‘Micro Motor’ and Cable
2 MT5018-00 Irrigation Pump Unit 6 MT1124-00 Surgical Handpiece
3 MT5015-00 Irrigation Support 7 MT5243-00 Irrigation Tubing
4 MT5011-00 Footswitch Control
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NOTE: For a full list of accessories used with the system, refer to the Mercian Micro Torque
and Bur brochure.
7

3 PREPARING FOR USE
1. Connect the mains power supply cable to the socket at rear of the Console.
2. Locate the irrigation bag support in the hole at back of the Console. Position the upright to suit
and secure with the thumb wheel.
3. Insert the ‘Micro Motor’ connector into the Console.
4. Insert the Foot Control connector into the Console.
NOTE: Take care when locating the connectors in the Console. The connectors are
industry standard ‘Lemo’ plugs and will only fit in one position. Orientate the
connector so that it locates in the socket and push in (when fitted correctly the
connector will click and lock in position). The connector has a spring loaded
sleeve, the initial outward pressure applied when removing the connector will
release the locking mechanism.
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Micro Torque MT5000

5. Attach a compatible Handpiece in to ‘Micro Motor’ and make sure that it is fitted securely.
6. Place a Sterile Bur in to the Handpiece and turn the collar anti-clockwise until you feel the
‘click’ of the chuck to secure the bur.
7. Switch ON the Console at the switch at the rear of the unit.
WARNING: Always handle with care when the Console is switched ON and prepared for
use. Inadvertent operation of the foot pedal can cause personal injury to the
user or other persons nearby.
WARNING: Make sure that you feel the ‘click’ of the chuck closing onto the bur to
ensure the locking mechanism is fully closed. There is a danger of the
Handpiece overheating if it is run with the chuck not completely closed. This
can result in lip burn to the patient.
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Micro Torque MT5000
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4 INSTALLING THE STERILE IRRIGATION TUBING IN TO THE PUMP
UNIT ON THE CONSOLE
1. Hang the bag of sterile water on the upright. (Sterile water is recommeded for use rather than
saline)
2. Insert the spike of the sterile irrigation tubing into the sterile water bottle.
NOTE: Only use original Mercian irrigation sterile tubing.
3. Open the pump lid.
4. Place the larger bore irrigation tubing centrally on the pump rollers and close the lid on to the
tubing.
NOTE: The action of closing the pump lid will centralise and clamp the tube on the rollers.
The pump is designed for use with 3.2mm bore tube and requires no adjustment by
the user.
5. Secure the micro bore irrigation tubing at convenient intervals to the ‘Micro Motor’ cable with
the tubing clips and finally attach to the spray nozzle tube on the Handpiece.
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Micro Torque MT5000
Read instructions before use Do not put fingers in rollers!

5 CONTROL UNIT FUNCTION AND DISPLAY
1. Buttons to select the ‘Pre-Set’ program settings 1 and 2.
2. Button to enter the ‘Set up’ menu.
3. Buttons to select FORWARD or REVERSE operation of the ‘Micro Motor’.
4. Buttons to INCREASE (+) and DECREASE (-) the speed of the ‘Micro Motor’.
5. Buttons to INCREASE (+) and DECREASE (-) the pump speed to control the water irrigation
flow rate.
6. ‘Pre-Set’ program selected indicator (P1 or P2).
7. ‘Micro Motor’ operation FORWARD or REVERSE indicator.
8. ‘Micro Motor’ speed display in rpm (revolutions per minute). Shows the set maximum or the
actual operating speed when the ‘Micro Motor’ is in use. (The accuracy is +/- 5%)
9. Bar display indicating the actual operating speed relative to the maximum speed set when the
‘Micro Motor’ is in use.
10. Irrigation flow rate display as a % of the maximum.
11. Socket for Foot Control connector.
12. Socket for ‘Micro Motor’ connector.
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Micro Torque MT5000
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6 USING THE CONSOLE UNIT FUNCTIONS
6.1 Using and Setting the ‘Pre Set’ Function
Commonly used program settings can be allocated and stored to the 2 quick set up buttons
according to the user’s needs.
The displayed ‘Micro Motor’ maximum speed and pump flow rate will be stored by holding down
one of the 2 program buttons for a few seconds until a beep is heard. The settings will be stored
against that program button and can be retrieved at any time by pressing the relevant button. The
Console will retain these settings until the ‘Pre Set’ button is set again.
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Micro Torque MT5000

6.2 Adjusting the Speed of the ‘Micro Motor’
Use the +or -buttons on the Console to set the required maximum speed of the ‘Micro Motor’. The
motor speed (rpm) is ‘stepped’ in increments there are 16 available speeds, these are shown below:
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Pressing either the + or - button will move to the next speed in the range - higher or lower as
applicable.
At the end of the speed setting sequence the micro motor will revert to OFF setting.
The Console has an ‘built-in’ memory. When the unit is powered down the last speed setting used
will be recalled when the unit is switched back on again.
NOTE: The Console software will stop the ‘Micro Motor’ instantly the operating pedal on the
Foot Control is released. This is a safety feature of the MT5000 to prevent the bur
from running on.
Figures show rpm (revolutions per minute)
1,000 2,000 3,000 4,000 5,000 6,000 8,000 10,000
12,500 15,000 17,500 20,000 25,000 30,000 35,000 40,000

6.3 Setting the Irrigation Functions on the Display
Use the irrigation adjustment +or -buttons on the Console to set the Irrigation flow rate. Again, the
flow rate is adjusted in increments. there are 15 available flow rates these are given as a % of the
maximum pump flow rate. The flow rates available are shown below.
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Pressing either the +or -button will move to the next available flow rate in the range.
At the bottom end of the flow rate sequence the pump will revert to OFF setting.
The Console’s memory will recall the last flow rate setting used when the unit is switched back on
again.
In operation the irrigation function can be toggled between ON (to the set Flow rate) or OFF with the
right hand button on the Foot Control.
NOTE: When the pump is halted by the button on the Foot Control, the pump will cycle back half
a turn before stopping. This is a design feature of the pump that prevents the ‘run-on’ of
the irrigation fluid after the pump is switched off.
Maximum or 100% flow rate delivers 100 ml of water per minute.
When the pump is not operative is indicated on the display.
Figures % of maximum flow rate
5 10 15 20 25 30 35 40 45 50 60 70 80 90 100

6.4 Forward and Reverse Settings on the Display
The ‘Micro Motor’ rotation can be switched between FORWARD and REVERSE by using the
buttons on the front of the Console. A beep will sound to warn the user when the direction of
rotation has been changed.
The direction of rotation will be shown on the display by the applicable symbol.
Forward Reverse
In operation FORWARD and REVERSE can be selected with the left hand button on the Foot
Control.
This function is NOT stored in the pre-set function or recalled by the memory when the unit is
switched ON. The unit will always display the FORWARD position by default when the unit is
switched ON. The selected position will not change until the opposite direction is selected on the
Console or with the button on the Foot Control.
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6.5 Set up Menu function
To enter the menu press the set up button to display and then use the +& -buttons to navigate and
select from the following options;
1. Brake options = selected Motor Brake operation from 3 options:
• No brake Will allow the motor to slow down without any braking.
• Soft brake Will allow the motor to brake but without any kick (Default Setting).
• Hard brake Will allow motor will halt the motor immediately.
2. Pump return = selection of the amount of backward rotation of the Pump after motor is
stopped:
• Half Turn Pump reverses half a return after motor stopped.
• Full Turn Pump reverses a full return after motor stopped (Default Setting).
• No return Pump does not reverse when the motor is stopped.
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3. Motor fault will detect any difference in the currents between the 3 windings in the Micro
Motor. When a Hand Piece or Motor stall occurs there is a difference in the current drawn by
one winding against another, this compares the difference between the current on one
winding against another and if it exceeds the settings selected below it cuts out to protect the
Hand Piece and Motor.
• 1.5 amps Lower setting compares lower level of amps before cutting off.
• 2.0 amps Medium setting compares medium level of amps before cutting off.
• 2.5 amps Higher setting compares maximum level of amps before cutting off (Default
Setting - recommended).
4. Current fault measures the total draw of current when the Motor/Hand Piece is put under
load, therefore as the Surgeon exerts more pressure on the Bur the Motor will require to draw
more current from the board to drive the Motor;
• 4 amps Lower setting.
• 4.5 amps Medium setting.
• 5 amps Higher setting for hard use (Default Setting – recommended).
The maximum recommended current drawn for the Micro Motor is 5 amps; anything
exceeding this during heavy use can cause the Motor to overheat.
To exit the menu screen display press the Set up Menu button.
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7 FUNCTIONS AND OPERATION OF THE FOOT CONTROL
1. ‘Micro Motor’ speed control pedal 4. Handle for moving pedal around
2. Forward or reverse button 5. Connector for Foot Control into Console
3. Irrigation pump ON/OFF button
WARNING: Always handle with care when the unit is switched ON and prepared for use.
Inadvertent operation of the foot pedal can cause personal injury to the user or
other persons nearby.
Applying gradual pressure to the pedal (1) will increase the ‘Micro Motor’ speed up to the full ‘Pre-
Set’ speed shown on the Console display.
The right hand button (3) on the Foot Control will toggle the irrigation pump between OFF and ON.
FORWARD and REVERSE can be selected with the left hand button (2) on the Foot Control. A beep
will sound to warn the user when the direction of rotation has been changed.
The handle (4) allows the operator to manoeuvre the Foot Control with their foot to suit. The handle
can be positioned raised or lowered as required.
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8 REPLACING FUSES ON THE UNIT
There are two fuses in the carrier they should be checked and replaced as necessary.
WARNING: Make sure the unit is switched OFF and the power cable is removed from the
MAINS supply before withdrawing the fuses.
NOTE: The fuses are installed in a fuse holder above the power connector located at the rear of
the control unit. The mains cable must be removed from the power socket to access the
tab on the fuse carrier.
To remove the fuse carrier, place the finger nail or a small screwdriver under the tab and pull to
release. Fully withdraw the carrier and rotate downwards to access the fuses.
Replacement 2.5 Amp fuses must be used.
9 SERVICE AND REPAIRS
No servicing or repairs should be undertaken by any agent other than Mercian Surgical
technicians or technicians trained by Mercian Surgical.
Liability cannot be assumed if repairs are undertaken by third parties without authorisation or
the required training.
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10 DISCONNECTING THE ‘MICRO MOTOR’ FROM THE HANDPIECE
The Handpiece can be pulled apart from the ‘Micro Motor’ easily as shown.
WARNING: Only use COMPATIBLE Handpieces on the ‘Micro Motor’ complying to
DIN13940/ISO 3964.
The Micro Motor and Handpiece are applied parts of the system.
11 LUBRICATION, DISINFECTION AND CLEANING
11.1 Console Unit
The Console unit can we wiped down using a proprietary medical surface disinfection
wipe.
11.2 Foot Control
The Foot Control can be wiped down with a surface disinfectant solution.
11.3 Maintenance Procedure ‘Micro Motor’ and Handpieces
11.3.1 Manual cleaning of Handpieces
Clean and disinfect the exterior of the Handpiece with a clean damp cloth and
suitable disinfection solution.
Note: Products containing acetone, chlorine, and bleach are not recommended
as disinfectants.
Visually inspect the Handpiece and Micro Motor for any remaining debris and
damage.
Note: Handpieces are not suitable for cleaning in an ultrasonic bath.
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Micro Torque MT5000
1 3 4˚C
Indicates that the Micro Motor can be
processed in a washer-disinfector for
thermal disinfection.
Sterilisable in a steam
sterilizer at temperature
specified.

11.3.2 Automatic cleaning of Handpieces in a washer disinfector
1) Place the Handpieces in the appropriate basket.
2) Pre rinse with cold mains water.
3) Wash with mains water up to 95ºC with alkaline detergent giving a pH of between
8.0 -11.00 in dilution.
4) Rinse with warm mains water at 50°C.
5) Post rinse with warm mains water at 50°C.
6) Final rinse with reverse osmosis water at 90°C.
7) Hot air drying.
Remove the instruments immediately from the Washer/Disinfector and lubricate prior to
sterilisation.
As per HTM 01-01 Part D: Washer Disinfectors.
Caution: Failure to lubricate immediately may lead to internal corrosion of the
instrument and its subsequent failure.
11.3.3 Lubrication of Handpieces and Micro Motor
Always Lubricate before each sterilisation.
Always use Mercian Lubrifluid oil spray order code; 1600064-006.
Procedure for Lubricating Hand Pieces
1) Remove Bur from instrument.
2) Open Chuck up.
3) Hold the Handpiece in a cloth to catch any debris and foreign matter expelled by
the jet.
4) Remove the protective cap from the can, and insert nozzle into the back of the
Handpiece sleeve.
5) Spray for about 1 second.
Note: After lubrication, always stand the Handpiece upright for 5 minutes.
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