Welch Allyn Kreativ User manual

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1. Safety.....................................................................2
2. Contra-Indications and Indications ......................3
3. System Overview...................................................3
4. System Unpacking, Setup, and Check-out............4
Filling the Powder Chamber ..................................4
User Settings .........................................................4
5. Using the System...................................................5
Unit Shutdown........................................................5
6. Mach 8 Special Instructions...................................5
7. Routine Maintenance.............................................6
8. Troubleshooting.....................................................8
9. Warranty, Returns and Adjustments......................9
Returns and Adjustments ......................................9
Limited Warranty....................................................9
Storage and Shipment...........................................9
10. Specifications.......................................................10
11. Recycling .............................................................10
CAUTION: This device must only be purchased by, or
sold to, a licensed dentist. Clinical use of the Mach 7/8
Air Abrasion system for procedures not included or
suggested in this guide is not advised. The Mach 7/8 Air
Abrasion system should only be used by dental
professionals who have practiced on extracted teeth and
are thoroughly familiar with the contents of this manual.
© 2000, Welch Allyn / Kreativ, Inc. All rights reserved. No part of
this manual may be reproduced without written permission
from Welch Allyn / Kreativ, Inc.
Kreativ Menu
Manuals

990154 Rev. A Page 2
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Warnings
The dentist, staff, and patient should always wear
protective eye equipment to avoid corneal abrasion or
irritation if particles are deflected into the eye.
A
rubber dam is recommended to avoid injury to
gingiva or other soft tissue, and to protect adjacent
tooth surfaces during interproximal preparations.
Never direct the
handpiece at an open pulp chamber or
at pulpal exposures. Never place the handpiece in
direct contact with the gingiva when the air pressure is
activated. While the abrasive stream may not cut the
gingival tissue, it may irritate it.
Sterilize all Mach 7/8 accessories that come in contact
with the patient prior to each use.
The
handpiece must never be directed at soft tissues ,
even for a brief period of time, because subcutaneous
emphysema can occur whenever compressed air is
employed intraorally.
Never rest the handpiece on the patient’s body.
Always
disinfect the handpiece cradle in the unit before
each patient use.
Always use your
high volume evacuation system when
using the handpiece of the Mach 7/8. Place the high
volume evacuation system in close proximity to the
operative site, especially if you are asthmatic or
predisposed to respiratory problems.
Connect the Mach 7/8 system only to a
properly
grounded electrical outlet
.
If the unit is dropped , check it carefully before use.
Safety Labels
Alternating current
Ground
Attention, refer to accompanying manual
Power Off
Power On
Type B equipment (defines the degree of
protection against electrical shock)
12 VDC
Air In
Footswitch
Remote
Cautions
The handpiece should be
directed precisely at the
surfaces and tooth structures
that are to be modified or
removed. The nozzle tip should be placed a few
millimeters from the tooth and angled toward the area
to be removed or modified.
Do not attempt to service the unit beyond those items
described on page 6,
Maintenance . Call an authorized
Welch Allyn / Kreativ service representative for
instructions.
Practice on extracted teeth prior to using the Mach 7/8
on patients. Begin with the 27.5 micron aluminum oxide
powder. Use only short bursts, carefully monitoring your
progress. Most users prefer the 27.5 micron powder at a
Particle Energy setting of 50-80 PSI.
Do not substitute non-Welch Allyn / Kreativ materials or
accessories. Use of materials or accessories supplied
by other manufacturers may result in damage to the
unit and will void the factory warranty.
Use only clean, dry air . Make sure that your air
compressor system uses fully operational air dryer filter
systems. Any moisture or oil in the air supply will
adversely affect the performance of the Mach 7/8.
Check to be sure that your air system produces the
minimum pressure and flow rate indicated in the Air
section of the Specifications (page 10).
Sound clinical judgment, common sense and proper
training
are essential to the successful use of this unit
to provide safe and efficient patient care.
Always use the
lowest possible pressure settings
sufficient to perform the current dental technique the
system is being used for.
Always
place the handpiece back in its holder when not
in use to place the unit in Standby mode.
When the handpiece is removed for sterilization, the
handpiece extension must be placed in its holder to
place the unit in Standby mode.
Compliance
The equipment has been tested and found to comply
with the limits for a Class B, Group 1 device pursuant
to EN60601-1-2. This equipment generates radio
frequency energy that may interfere with other
equipment. If this equipment is suspected of interfering
with other equipment, this can be verified by turning the
equipment off and on. If this equipment is interfering
with other equipment,
•Increase separation between the devices.
•Connect the devices to different AC outlets.
•Contact Welch/Allyn / Kreativ.

990154 Rev. A 3
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Contra-Indications
•Severe dust allergy, Asthma, or Chronic pulmonary
disease
•Recent extraction or oral surgery
•Any lesion, sore, or open wound
•Sutures in the mouth
•Recent periodontal surgery
•Advanced periodontal disease with a compromised
periodontal attachment
•Recent placement of orthodontic appliances with
resulting oral abrasions
•Subgingival caries removal
•Any condition that would place the patient in
greater risk of emphysema by using compressed
air in the mouth
Indications
Intra-Oral
•Prepare teeth for Class I, II, III, IV, V and tunnel
restorations
•Prepare teeth for veneer/facing restorations
•Prepare teeth for pit and fissure sealants
•Partial removal of composite restorations and
repair at failure sites
•Etch metal, porcelain, and composite restorations
prior to repairing them
•Removal of composite, amalgam or porcelain
restorations
•Remove residual stains from enamel and dentin
•Removal of stain and calculus from teeth
Extra-Oral
•Clean cement from displaced crowns prior to
recementation
•Clean restorations prior to recementation
•Etch internal surfaces of restorations
•Etch stainless steel crowns
•Carve occlusal anatomy in porcelain restorations
prior to cementation
•Satinize metallic restorations to locate interference
prior to cementation
•Repair prosthetic appliances
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The Welch Allyn / Kreativ Mach 7/8 Air Abrasion system is
designed to remove tooth structure and other materials to
prepare teeth for restoration, and as an adjunct to a high
speed dental handpiece and bur. The system
delivers a
controlled mixture of abrasive particles in a dry air stream
through the handpiece nozzle.
This manual should be thoroughly reviewed before
installing and/or using the equipment. Please call
Welch Allyn / Kreativ or their representative if you need
additional information regarding installation, operation,
or service of the instrument.
The Mach 7/8 system is designed for use only by and
on the order of a dentist.
Mach 7 Main Controls
(See page 5 for Mach 8 control differences)
Figure 1: Mach 7 Controls
Power Turn power on or off
Air Control Select Ready or Standby mode to pressurize or
depressurize the system
Beam
Intensity
The amount of abrasive powder delivered to the
handpiece nozzle. Range: 1 to 10.
Particle
Energy
The pressure at which the abrasive powder is
delivered. Range: 40-120 PSI (275-825 kPa).
Nozzle
Selection
Press to select a nozzle: Standard handpiece
(Gray, Green, or Blue), or Super Sonic
handpiece (Red, Gold, or Violet).
Low
Powder
Indicator
Low powder level will cause an error to display
on the Beam Intensity and Particle Energy
LEDs. The unit will continue to operate. See the
Error Code definitions on page 8.
Low Air
Indicator
If the Input pressure is insufficient to keep the
pinch valve closed or the system is unable to
reach selected pressure, the unit alarm will
beep and an error will appear on the Beam
Intensity and Particle Energy LEDs. See the
Error Code definitions on page 8.
Particle Energy
Beam Intensity
Power
On/Off Nozzle Selection
Handpiece
Cradle
Handpiece Hose
connection
Mode
Select

990154 Rev. A 4
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Mach 7/8 Rear Panel connections
Figure 2: Mach 7/8 Rear Panel Connections
WARNING: Some residual powder may remain in the
unit after factory testing. Always use protective
eyewear when using the Mach 7/8 Air Abrasion
system, and do not direct the nozzle towards the
face when operating the footswitch.
CAUTION: Many air and water connectors look
alike. Do not connect your instrument to
water. Connecting the instrument’s air input
supply line to a water outlet will damage the
instrument. Repairs for such damage are not
covered under the limited warranty.
1. Open the Mach 7/8 cover.
2. Open the powder chamber, remove desiccant pack
from inside of chamber and fill it with powder (see
Filling the Powder Chamber ).
3. Close the powder chamber and Mach 7/8 covers.
4. Connect the footswitch to the rear panel of the unit.
5. Connect the delivery hose between the handpiece
nozzle assembly and the front of the Mach 7/8.
Place the handpiece with extension in the cradle.
Note: When removing handpiece for sterilization,
always return handpiece extension in the cradle.
6. Connect the air hose between the office air supply
and the Mach 7/8. If you have a compressor, refer to
the compressor User’s Guide for information about
use of Welch Allyn / Kreativ compressor air.
7. Connect the DC output of the external power supply
to the back of the Mach 7/8 unit.
8. Connect the power supply cord between an external
power supply and a properly grounded AC outlet.
9. If a remote control is provided with your unit, refer to
your remote control User’s Guide for connection.
Note:
A remote plugged into a Mach 7 will take control
from the front panel. A remote plugged into a
Mach 8 will function as a second operatory.
Note:
A special footswitch “Y”adapter cable is required
for the Mach 8 (see page 5).
CAUTION: Do not exceed 135 PSI at input. Applying
pressure in excess of 135 PSI will cause the
relief valve to release any excess pressure.
Filling the Powder Chamber
WARNING: Press Air to select Standby mode
before
opening the lid and filling the powder chamber.
The lid cannot be removed with the system
pressurized (in Ready mode).
1. Set the Mach 7/8 Power Switch to OFF.
2. Open the lid of the Mach 7/8.
3. Remove the powder chamber lid by turning it
counterclockwise.
4. Pour powder into the powder chamber to a level just
below the metal filter.
Make sure that no lint, dirt, or
other foreign substance enters the chamber
.
5. Close the powder bottle tightly to prevent moisture
from entering the bottle.
6. Replace the powder chamber lid and hand tighten it.
7. Close the Mach 7/8 lid.
WARNING: Do not power up the system with the
powder chamber open.
User Settings
You can change the Mach 7/8 factory settings for error
code and pressure displays. Error codes can be
displayed in English, numeric, or both. Particle energy
can be displayed in PSI or kPa.
1. When the unit powers up, it will display a version
code. Press and release the Nozzle Select button
when this code is displayed.
2. Press the
▲▼ Beam Intensity keys to select a mode
for error code display: 1 = English, 2 = Numeric,
3 = Alternating.
3. Press the
▲▼ Particle keys to select a mode for
Particle Energy display: 1 = PSI, 2 = kPa.
4. Turn the system off and on to enter your changes.
REMOTE

990154 Rev. A 5
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Read
y
1. Turn the unit on. All of the lights on the Control
Panel will flash and the yellow Standby indicator will
turn on. When the lights stop flashing, the unit is in
Standby mode. The values shown will be the
settings from the last use.
Note: Opening the lid of the unit will depressurize
the system and power will turn off.
2. Press the
▲▼ keys to adjust the Particle Energy to
provide optimum powder flow. This adjustment can
be made in either Ready or Standby mode. A low
Particle Energy setting (50-70) is suggested when
first using the instrument.
3. Set the Beam Intensity (1-10) by pressing the Beam
Intensity ▲▼ keys. The suggested beginning setting
for Beam Intensity is 5.
4. Press Air to select the Ready mode.
5. Lift the handpiece from the cradle. If the handpiece
was out of the cradle during power up, it must be
replaced and then removed prior to pressing the
footswitch. Failure to do so will result in an error.
WARNING: Inspect the condition of the handpiece
tip prior to each use.
WARNING: Direct the initial powder sample into the
high volume evacuation system prior to each
patient use or when changing system settings.
6. Press the footswitch to start the powder flow through
the nozzle.
Note: If the handpiece is out of the cradle during power
up, it will need to be replaced and then removed
prior to pressing the footswitch.
Unit Shutdown
1. Press Air to select Standby mode.
2. Set the Power Switch to OFF.
Note: If the handpiece is left out of the cradle and the
unit is not used for 10 minutes, the unit will revert
to Standby mode. When in Standby or when the
handpiece is placed in the cradle, the footswitch
is disabled. The unit will go to Standby when the
handpiece is placed in the cradle.
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The Mach 8 is a multi-operatory version of the Mach 7.
It is configured to use the main unit display as one
operatory, with the display control module (included)
operating from a remote site up to 16 feet away.
An optional second remote can be connected to
provide dual remote functions with separations up to 32
feet. Contact your authorized Welch Allyn / Kreativ
representative for these optional accessories.
I / O
Ready
The Mach 8 display panel and controls are the same as
the Mach 7, except the Mach 8 has two handpiece
hose connections. Before using the unit, verify that
each hose works with its corresponding control panel
and foot switch.

990154 Rev. A 6
When a remote control module is plugged into the rear
panel of the Mach 8, it functions as a second operatory.
Air
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•To activate one operatory at a time, remove the
handpiece from the appropriate cradle.
•To deactivate or to allow the other operatory to
function, place the handpiece back in the cradle.
Only one operatory can work at a time, and the inactive
display panel will go blank.
Note: Always place the handpiece extension back in
the cradle when the handpiece is removed from
the hose assembly for sterilization. Failure to do
so will lock out the other operatory, preventing it
from being activated.
The foot switch “Y”adapter cable is required for second
operatory use of the Mach 8. If a foot switch is plugged
directly into the Mach 8 rear panel, it will only activate
operatory one.
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Proper maintenance of the Mach 7/8 system is needed
to maintain consistent cutting efficiency.
Note: There are no user-serviceable parts inside and
all servicing (other than explicitly defined in the
manual) shall be performed by the manufacturer
or his authorized agent.
Cleaning Instructions
Case (outside)
Clean the case and control areas with a soft cloth
slightly moistened with a mild detergent or isopropyl
alcohol. Do not use any type of abrasive cleaners,
scouring powder or solvents on the case.
Case (inside)
Excessive powder inside the equipment may be
removed with a vacuum or a cloth, slightly moistened
with water or isopropyl alcohol. Never use a moistened
cloth on the Printed Circuit boards.
Powder Chamber
Clean the powder chamber, chamber lid, and gasket
with a soft dry cloth. A soft bristle brush may also be
used to remove excess powder.
Daily Requirements
Powder Chamber (perform daily or as required)
1. Open the powder chamber.
2. Observe the powder level and refill as necessary.
Powder Chamber Gasket (perform with powder fill up)
1. Every other time you refill powder, clean the lid
gasket thoroughly before replacing the lid.
2. Thoroughly clean all mating surfaces.
3. Hand tighten the lid to avoid air leaks.
4. Inspect inside of unit for powder, clean up excess
powder.
Weekly Requirements
Powder Chamber
1. Inspect the powder chamber for moisture.
2. Look for powder clumps or wet powder and discard
and replace as necessary. To dry wet powder, place
the powder to be used into a microwave-safe
container. Microwave on high for 45 seconds to dry
the powder prior to placing it in the chamber.
Note: Be careful when removing the container from
the microwave, as it may be hot.
REMOTE

990154 Rev. A 7
Air Filter Elements
1. Examine the Silica Gel filter for change of color.
2. If the purple gel has become clear, replace the filter.
3. New filters are available from your authorized Welch
Allyn / Kreativ service representative.
4. Examine the Paper Element (coalescing) filters for
damage and wetness.
5. Replace as necessary. New filters are available
from your authorized Welch Allyn / Kreativ service
representative.
Pinch Tubes
1. There is one pinch tube inside the pinch valve
assembly, located between the powder chamber
and the front of the unit.
2. Remove the pinch tube by removing the two thumb
screws and the black cover block.
3. Pull the pinch tube from the hose assembly.
4. Inspect the tube for signs of wear and replace with
new tube as necessary.
5. Realign the pinch tube assembly with the grooves
and securely tighten the thumb screws.
Monthly Requirements
Internal Tubing
1. Inspect internal tubing for wear and air leakage.
2. Listen for audible leaking sounds and look for
powder accumulation internal to the unit.
3. Soapy water and a small paintbrush are ideal for
finding small air leaks.
4. Clean up excess powder to help isolate the leak
area.
5. If a leak is detected, try re-seating the tube into its
fitting, or replace any damaged tubing.
6. If the leaking persists, please call your authorized
Welch Allyn / Kreativ service representative.
Handpiece Nozzles
It is possible to have a worn nozzle without any visible
signs. However, the system’s performance will be
affected.
1. Inspect all the handpiece nozzles for wear, paying
close attention to the carbide insert at the end of the
tip.
2. If there are any slits or chips, replace the nozzle.
3. A worn nozzle will greatly effect the performance of
cutting and powder flow control.

990154 Rev. A 8
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Refer to the following table before you contact your Welch Allyn / Kreativ service representative.
Problem Possible cause Remedy
Error Code 35 Footswitch down on Power Up Check switch
Error Code E-42-1 (Lo Pdr) Low Powder Add powder
Error Code E-42-2 (Lo Air) Low input pressure Check pressure
All other error codes Call local service rep Call local service rep
No Power Power supply unplugged Check plugs
Main switch OFF Check switch
Main switch bad Call local service rep.
Blown circuit breaker in the
Operatory Check facility power box
Lid is open Close lid
No powder flow when footswitch
is activated Footswitch not plugged in Check connection
Particle Energy or nozzle not
properly selected Check LED displays
Handpiece/nozzle clogged Check for clog
Handpiece inoperable,
handpiece was not in cradle on
power up
Replace and remove handpiece
from cradle. If it still does not
function properly, clean the LED
sensor hole with a cotton swab.
Tubing pinched Check tubing
Powder chamber empty Refill powder chamber
Air Valve problem Call local service rep
Clogged orifice in chamber Disassemble and clean chamber
Powder flow from handpiece hose Ruptured handpiece hose Call local service rep
Air flow from nozzle when
footswitch is not depressed Loss of air pressure due to a misadjusted pinch valve
regulator
Put system in Standby and call local
service rep
Faulty footswitch Put system in Standby and call local
service rep
Defective pinch valve Put system in Standby and call local
service rep
Pinch valve block is not tight Put system in Standby and tighten
thumb screws
Cutting rate is inaccurate Pressure indicator is inaccurate
or feed system drive failure Call local service rep
Erratic powder flow Powder caking in chamber Replace powder
Chamber empty Check powder level
Nozzle partially clogged Check nozzle
Moisture in air line Check filters, replace powder and
filter
Blown pinch tube Change pinch tubes
Powder spray loses definition Worn nozzle tip Replace nozzle
Too much distance from cutting
surface Work closer
Excessive powder inside unit Hole in tubing. Replace tubing
Hole in pinch tube Replace pinch tube
Error beep when footswitch is
pressed Handpiece was not in cradle on power up Put handpiece in cradle and remove
System fails to depressurize when
switching to Standby mode Inoperative valve Disconnect air supply and call local service rep
If these instructions do not solve the problem, please contact Welch Allyn / Kreativ
Technical Support at: [phone] (US Only) or [phone](Fax)

990154 Rev. A 9
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Returns and Adjustments
Warranty claims must be made promptly and received
by your nearest authorized Welch Allyn / Kreativ
service representative during the warranty period. The
liability of Welch Allyn / Kreativ, under valid warranty
claims, is limited to repair or replacement at the
purchaser’s authorized Service Center or the
purchaser’s place of business, at the option of the
authorized service representative. If it is necessary to
return a product for repair or replacement, authorization
for the return must first be obtained from the authorized
service representative.
All products returned for examination or warranty repair
must be sent insured via a means of transportation
specified by the authorized service representative.
Welch Allyn / Kreativ, or its authorized service
representative claims the sole responsibility for
determining the cause of any instrument failure and the
adjustments are subject to Kreativ approval.
Limited Warranty
Welch Allyn / Kreativ warrants the equipment to be free
from defects in material and workmanship for a period
of 12 months from the date of shipment. Damage due
to failure of the customer to perform the required
user/preventive maintenance is not warranted. Certain
components having limited life expectancy (pinch
tubes, air/abrasive tubing, hand pieces and handpiece
tips) are not warranted against normal wear and tear or
customer damage. This limited warranty applies only to
the original purchaser / user of the equipment.
The foregoing limited warranty is exclusive and in lieu
of all other warranties, whether written, oral, or implied,
and shall be purchaser’s sole remedy and Welch Allyn /
Kreativ’s sole liability under contract or warranty or
otherwise for the product.
Welch Allyn / Kreativ disclaims any implied warranty of
merchantability or fitness for particular purposes. In no
event shall Welch Allyn / Kreativ be liable for any
incidental or consequential damages, or for any
incidental or consequential damages arising out of, or
in connection with, the use or performance of the
product delivered hereunder.
Storage and Shipment
The Welch Allyn / Kreativ Air Abrasion dental
instruments have been designed for long term usage in
normal dental office environments. If it is to be stored
for any reason for a long period, it should be covered to
protect it from adverse conditions. The area it is to be
stored in should meet the Environmental Limitations
Transport and Storage Requirements indicated in the
Specifications section (page 10).
The unit has been designed for shipment by normal
commercial carriers. Protective packaging should be
used, and the original packing materials should be
reinstalled for shipment. Shipping instructions must be
followed closely. The purchaser will be responsible for
damage resulting from improper packing.

990154 Rev. A 10
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Power
100-240 V~, 50 / 60 Hz,
0.75A - 0.35A using external DC
power supply delivered with unit.
Air
80 psi to 130 psi (550 kPa to 896
kPa) with at least 1.2 cfm (34
l/min) recommended
Size
10”x 15”x 10”(25cm x 38cm x
25cm)
Weight
12 lbs. (5.5 kg)
Environment
Operational
Temp: 50°F (+10°C) to 104°F
(+40°C)
Relative humidity: 30% to 75%
Pressure: 10.15 psi (70 kPa) to
15.3 psi (106 kPa)
Transport and
Storage
Temp: -40°F (-40°C) to 158°F
(+70°C)
Relative humidity: 10% to 90%
Pressure: 7.25 psi (50 kPa) to
15.3 psi (106 kPa)
Equipment
Classification
Class I (requires an electrical
earth ground) and ordinary
protection against ingress of
water
Applied Part: Type B
Mode of Operation:
Continuous Operation
Particle
Energy
Accuracy
The Particle Energy (PSI) display
is an internal pressure
measurement and should not be
interpreted as the precise
pressure at the handpiece nozzle.
Electrical
Fuses
There are no customer
serviceable fuses.
Options
A wide selection of abrasive
powders and nozzle tip angles
and sizes are available from
Welch Allyn / Kreativ.
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All recycling must be in compliance with relevant
national laws. Government authorized recycling centers
must be used. There are no hazardous materials in this
product.
Device
•All covers and housings should be recycled
(steel or aluminum).
•Plastic parts should be removed from the metal
pads before recycling (e.g., power inlet, footswitch
connector, main switch, etc.)
•All printed circuit boards should be recycled as
electronic devices.
Accessories
•All spare parts should be recycled as listed above.
•Parts that have been in contact with the patient
should be cleaned and sterilized.
Packaging
The carton, all other plastics, and inserts should be
recycled (cardboard, foam, polyethylene).
Environmentally Relevant Materials
Components Materials
Enclosure, all brackets Steel, Aluminum, ABS
Printed Circuit Boards Epoxy, FR4
SAVE THE CARTON! The Mach 7/8 and all
accessories are shipped in a single container. The
shipping container and packing materials should be
retained in the event that the instrument has to be
returned for service or repair.
Manufactured by
Welch Allyn / Kreativ, Inc. USA
7420 Carroll Road
San Diego, CA 92121
European Regulatory Manager
Welch Allyn LTD.
Navan, Co. Meath
Republic of Ireland
Ph: 353-46-79060