Omni International Omni Mixer User manual

HOMOGENIZER
OWNER’S MANUAL

2
This manual is a guide for the use of the Omni Mixer and Omni Macro
Homogenizers and accessories.
Data herein has been verified and validated. It is believed adequate for the
intended use of the instrument. If the instrument or procedures are used for
purposes over and above the capabilities specified herein, confirmation of the
validity and suitability should be obtained, otherwise Omni International does
not guarantee results and assumes no obligation or liability. This publication is
not a license to operate under, or a recommendation to infringe upon, any
process patents.
Notes, cautions, and warnings within the text of this manual are used to
emphasize important and critical instructions.
This Omni International product is warranted to be free from defects in
material and workmanship for a period of THREE YEARS from the date of
delivery. Omni International will repair or replace and return free of charge
any part which is returned to its factory within said period, transportation
prepaid by user, and which is found upon inspection to have been defective in
materials or workmanship. For the first 90 days, both parts and service are
without charge. For the balance of the period, parts will be provided but
service will be charged at established labor rates. This warranty does not
include normal wear from use; it does not apply to any instrument or parts
which have been altered by anyone other than an employee of Omni
International nor to any instrument which has been damaged through
accident, negligence, failure to follow operating instructions, the use of
electric currents or circuits other than those specified on the plate affixed to
the instrument, misuse, or abuse. Omni International reserves the right to
change, alter, modify, or improve any of its instruments without any obligation
whatever to make corresponding changes to any instrument previously sold
or shipped.
THE FORGOING OBLIGATION IS IN LIEU OF ALL OBLIGATIONS AND
LIABILITIES INCLUDING NEGLIGENCE AND ALL WARRANTIES OF
MERCHANTABILITY OR OTHERWISE, EXPRESSED OR IMPLIED IN FACT
OR BY LAW, AND STATE OUR ENTIRE AND EXCLUSIVE LIABILITY AND
BUYERS EXCLUSIVE REMEDY FOR ANY CLAIM OF DAMAGES IN
CONNECTION WITH THE SALE OR FURNISHING OF GOODS OR
PARTS, THEIR DESIGN, SUITABILITY FOR USE, INSTALLATION, OR
OPERATION. OMNI INTERNATIONAL WILL IN NO EVENT BE LIABLE
FOR ANY SPECIAL OR CONSEQUENTIAL DAMAGES WHATSOEVER,
AND THEIR LIABILITY UNDER NO CIRCUMSTANCES WILL EXCEED
THE CONTRACT PRICE FOR THE GOODS FOR WHICH LIABILITY IS
CLAIMED.
WARRANTY INFORMATION

3
-READ ALL INSTRUCTIONS BEFORE USING.
-SAVE THIS OWNER’S MANUAL.
The Omni Mixer and Omni Macro have been engineered for
economical functionality as well as safety; however, basic safety
precautions and common sense must always be demonstrated
when using any electrical product. Do not attempt to modify
any part of the Omni Mixer or Omni Macro. If you
experience problems with or have questions about your Omni
Homogenizer, contact your authorized dealer or call Omni
International at 1-800-776-4431 or 1-770-421-0058.
-DO NOT allow the machine to be submerged in any liquid.
-DO NOT use in any setting other than an indoor laboratory.
-DO NOT plug power cord into an incorrect outlet.
To reduce the risk of burns, electrocution, fire, or injury:
-Use this product only for its intended purpose as described in
this booklet. DO NOT use attachments not recommended by
the manufacturer.
-DO NOT operate the product if it is damaged in any way.
-Keep this product away from heated surfaces.
IMPORTANT SAFEGUARDS
DANGER
WARNING

4
TABLE OF CONTENTS
Warranty Information…………………………………... 2
Section 1. Omni Mixer and Macro Homogenizers
1.1 Specifications…………………………………………….
1.2 Parts …………………………………………………….
1.3 Assembly of the Mixer or Macro……………………….
1.4 General Operating Procedures…………………………
1.6 Quick Connect Coupling Assembly…………………….
1.7 Determining Motor Speed………………………………
5
5
6
7
8
8
Section 2. Rotor-Stator Generator Probes
2.1 Generator Probe Operation……………………………
2.2 Installing Generator Probes……………………………..
2.3 Operation………………………………………………..
2.4 Vessel Restraint Disk……………………………………
9
9
10
10
Section 3. Sealed Chamber Assemblies
3.1 Sealed Chamber Assemblies…………………………….
3.2 Using Blade Chamber Assemblies………………………
3.3 Sealed Generator Probe Assemblies……………………
3.4 Installing Sealed Chamber Assemblies…………………..
3.5 Positioning the Chamber Assembly……………………..
3.6 Using a Cooling Vessel…………………………………..
11
11
13
13
14
14
Section 4. Dispersating and Impeller Accessories
4.1 Dispersating Probe Accessories………………………...
4.2 Dispersion Impeller Accessories………………….…….
15
15
Section 5. Motor Unit Maintenance
5.1 Motor Drive Unit………………………………………..
5.2 Removal of Aluminum Coupling………………………...
5.3 Motor Brush Maintenance………………………………
5.4 Bearings and Lubrication………………………………...
5.5 Grounding Instructions………………………………….
16
16
16
17
17
Section 6. Explosion Drawings and Part Lists
6.1 Omni Mixer 115V/220V………………………………...
6.2 Omni Macro 115V/220V………………………………..
18
19
Section 8. Service
8.1 Assistance………………………………………………..
8.2 Decontamination………………………………………..
21
21
Section 7. Troubleshooting
7.1 Assistance………………………………………………..
7.2 Decontamination………………………………………..
20
20

5
The Omni Mixer and Omni Macro Homogenizers are variable speed, post-mounted
homogenizers. The Omni Mixer is powered by a 600watt, 18,000rpm motor, and the
Omni Macro by an 1,800watt, 20,000rpm motor. Both utilize a broad range of sealed
chamber assemblies, high shear knife assemblies, as well as a choice of seven different
diameter autoclavable rotor-stator generator probes. The versatility of these units is
unparalleled and makes them the ideal choice for general purpose laboratory
homogenizing.
1.1 SPECIFICATIONS
1.2 PARTS
Prior to operation, please remove all parts from the shipping container and inspect for
damaged or missing parts. If any parts are found to be damaged or missing, please
contact Omni International at 1-800-776-4431. The basic Omni Mixer or Omni Macro
consists of the following:
SECTION 1. OMNI MIXER & MACRO HOMOGENIZERS
Omni Mixer Omni Macro
Variable Motor Speed: 500-18,000rpm 1,000-20,000rpm
Height (with Stand): 24.5 in. 25 in.
Weight (with Stand): 16.3 lbs. (7.4kg.) 21 lbs. (9.5kg.)
Electrical Requirements: 115 volts, 60Hz or 220 volts, 50Hz
Standards Approval/Compliance:
115V: CSA certified none
220V: CE & CSA certified none
Description Mixer Macro Quantity
Motor Drive Unit (115V) 17-600-01 17-600-02 1
OR
Motor Drive Unit (220V) 17-1800-01 17-1800-02 1
Generator Probe Adapter 15001 15001 1
Instruction Manual 17258 17258 1
Clamping Knob Assembly 17164 17164 1
Support Post 17026 17026 1
Finished Base Assembly 17234 17234 1
Tool Kit (see Section 1.2) 17104 17104 1

6
1.2 PARTS (cont.)
The following components are supplied as part of the Omni Mixer and Omni Macro
tool kit (P/N 17104):
SECTION 1. OMNI MIXER & MACRO HOMOGENIZERS
1.3 ASSEMBLY OF THE OMNI MIXER OR OMNI MACRO
To assemble the Omni Mixer or Omni Macro Homogenizer please refer to the figure,
and:
• Insert the support post into the support base. Secure the set screw through the
back of the support base into the groove in the support post, using wrench PN
60241 (1/8 in. Allen) provided.
• Place the clamping knob assembly in the motor support housing with the two flat
surfaces on the clamping mechanism facing the support post hole. The clamping
knob assembly may be used either on the left or the right side of the Omni Mixer
or Omni Macro.
• Slide the motor support housing onto the support post and clamp it into place
with the clamping knob assembly. The motor support housing should be
positioned over the two longer legs of the support base.
Description Part Number Quantity
Gen Probe Multi Tool 00-402 2
20,32,35,45,55mm Knife
Tool
15100K 1
1/16 Allen Wrench 00-416 1
5/64” Allen Wrench 60027 1
3/32” Allen Wrench 60128 1
1/8” Allen Wrench 60241 1
5/32” Allen Wrench 737 1
5/16 x 5/8” Combo
Wrench
60033 1
5mm Lower Bearing Press 59105 1
7mm Lower Bearing Press 59107 1
Lubricant 61971 1
5mm 7mm

7
SECTION 1. OMNI MIXER & MACRO HOMOGENIZERS
CAUTION: To prevent damage to the drive mechanism, never operate the motor
without a complete chamber assembly or generator probe in position.
CAUTION: Never operate the motor with the generator probe (or sealed chamber
assembly) partially threaded onto the motor. To prevent damage to the motor and
attachments, follow the instructions in Section 2.2 to assure the generator probe (or
sealed chamber assembly, Section 3.4) is fully threaded into the coupling adapter.
NOTE: If you experience excessive vibration, heat, or bearing wear, please contact
technical support at 1-800-776-4431
1.4 GENERAL OPERATING PROCEDURE
The speed of the Omni Mixer or Omni Macro may be regulated to achieve optimum
results when working with different materials. A speed selection knob is located at the
side of the unit, as is a separate “OFF” or “ON” switch. When in the “ON” position
the motor speed can be varied from 0 rpm to maximum speed. Select the optimal
speed for each different combination of sample and accessory for best processing
results.
WARNING: Keep all housings in place and in working order. DO NOT use the
motor in a dangerous environment. DO NOT force the unit to do a job that it was
not designed to do.

8
SECTION 1. OMNI MIXER & MACRO HOMOGENIZERS
WARNING: Improper connection of the equipment can result in a risk of electric
shock.
WARNING: Reduce the risk of unintentional starting by making sure that the motor
switch is in the “OFF” position prior to plugging in the unit.
1.6 DETERMINING MOTOR SPEED
To determine motor speed during operation, an optional tachometer, PN 01009, may
be inserted into the Omni Mixer or Omni Macro through the top of the motor as
shown by removing the protective snap cap.
1.5 QUICK CONNECT COUPLING ASSEMBLY (optional)
The Quick Connect Coupling Assembly is an optional accessory for the Omni Mixer
and Macro. To use, attach a Quick Connect Adapter to your chamber assembly or
generator probe. Next, slide the Adapter into the Quick Connect Coupling and a
retaining ring positions into place for a secure hold. To disconnect, simply slide the
ring upward and the processing accessory is conveniently released.

9
SECTION 2. ROTOR-STATOR GENERATOR PROBES
2.1 GENERATOR PROBE OPERATION
Rotor-stator generator probes are available for use with the Omni Mixer and Macro
but are not supplied with the instruments. These probes can be used in a sealed
chamber, or for added convenience, in an open vessel environment when aerosols or
sample contamination are not a concern.
2.2 INSTALLING GENERATOR PROBES
All generator probes are easily installed to the motor unit by following these steps:
1. Screw the generator probe adapter PN 15001 into the coupling adapter
2. Screw the generator probe into the generator probe adapter until the O-ring is
completely inside the generator probe adapter.
3. If the generator probe does not thread fully into the generator probe adapter,
then unscrew the generator probe from the generator probe adapter. Slightly
rotate the rotor shaft collar on the generator probe. Then return to step 2.
4. Tighten the generator probe by hand with moderate force.
5. Remove the blue protective cap from the tip of the generator probe and the
homogenizer is ready to operate.
WARNING: The tip of the generator probe, especially on the saw tooth generator
probes, is sharp. For safety purposes it is advisable that the protective cap be replaced
on the generator probe when not in use.
CAUTION: The bottom of the generator probe is extremely fragile and care should
be taken to protect it. Replace the blue protective cap on the end of the generator
probe when the generator probe is not being used.
NOTE: If you experience excessive vibration, heat, or bearing wear, please contact
technical support at 1-800-776-4431
Generator Probe
Adapter

10
SECTION 2. ROTOR-STATOR GENERATOR PROBES
2.3 OPERATION
Generator probes can be used in open containers or in sealed chamber assemblies.
Sample processing efficiency is effected by:
• Amount of material processed vs. size and speed of the generator probe.
• Container geometry and size (round vessels encourage swirling, while fluted
or cornered vessels disrupt flow patterns for more effective mixing/
processing.
• Processing speed vs. optimal speed.
• Size and type of material and flow characteristics (material particles must be
small enough to be carried into the generator head for optimal processing).
To operate the generator probe simply remove the blue protective cap from the end
of the generator probe. Keep the blue protective cap on the tip of the generator
probe when the generator probe is not being used.
CAUTION: When using Teflon lower bearings, immerse the bottom of the generator
probe in liquid or in the sample to avoid premature failure of the lower bearing.
WARNING: DO NOT process pathogenic material in an open container, since
aerosols created during normal processing could be inhaled by the operator.
NOTE: Liquid circulates through the two holes in the generator probe. DO NOT
block the upper hole, although the lower hole may be completely submerged during
processing.
NOTE: For optimal sample recovery during processing, completely remove the
generator probe from the sample prior to turning off the motor drive unit.
2.4 VESSEL RESTRAINT DISK (Optional)
The Vessel Restraint Disk (Part # LT-750) can be used with the Omni Mixer and
Macro to help reduce splashing and contain aerosols during homogenization. This
accessory is compatible with 20mm and larger diameter rotor-stator generator probes
and with containers up to six inches in diameter. The Vessel Restraint Disk also helps
secure the container during processing.
NOTE: The Vessel Restraint Disk is not necessary when processing with sealed
chamber assemblies.

11
SECTION 3. SEALED CHAMBER ASSEMBLIES
3.1 SEALED CHAMBER ASSEMBLIES
Sealed chamber assemblies are available as separately ordered items for use with the
Omni Mixer and Macro. They consist of chambers, many of which are fluted to
facilitate mixing by inhibiting swirling, gasket screw on cover seals to inhibit aerosol
release, a shaft assembly, and a sharpened stainless steel blade, or generator probe.
Chamber materials include stainless steel, glass, polycarbonate, and polypropylene. A
full range of titanium chamber assemblies is also available for applications requiring
protection from leached elemental components, or where additional strength is a
factor. Please contact your nearest Omni International representative, or Omni
International at 1-800-776-4431 for complete details.
3.2 USING BLADE CHAMBER ASSEMBLIES
Stainless Steel or Titanium - These chamber assemblies are intended for liquid and
semi-solid materials. Homogenization and mixing will normally be completed within 30
seconds to one minute. For processing solid materials, first reduce particle size
diameter to 1cm or less. Load the material to be processed in the chamber. Do not fill
the chamber to full capacity. Processing of too much volume could force liquid up
through the rotor shaft.
Glass and Plastic - These chamber assemblies are intended primarily for low-
viscosity liquids or for light duty homogenization at speeds below 5,000 rpm. At
speeds greater than 5,000 rpm, place glass jar into a secondary container for added
protection.
WARNING: Inspect glass or plastic chambers for any scratches or cracks, and do not
use if any are found. Eye protection and utilization of a secondary container is
recommended to prevent damage or injury in case of glass breakage.
WARNING: The maximum recommended speed when using any of the blade
chamber assemblies is 10,000 rpm. Speeds in excess of 10,000 rpm can cause
excessive bearing wear or part failure.

12
SECTION 3. SEALED CHAMBER ASSEMBLIES
Centrifugable - These assemblies are available in plastic or stainless steel, and should
be used in the same manner as described for glass, plastic, and stainless steel on the
previous page.
Breaking Down Specimen Particles - At speeds below 5,000 rpm, specimen
particles may be broken down in the Omni Mixer by using hard materials, such as glass
beads. The Omni Mixer will act as a “bead mill”, agitating the chamber while the hard
materials do the work. Since sharpness is not essential, a dull blade should be used.
Homogenizing - For more complete homogenization of some materials, it may be
helpful to rock the motor drive unit slightly during processing in order to churn up the
specimen within the chamber.
WARNING: It is recommended that “bead mill” processing should not be undertaken
in a glass vessel.
Adding a Grinding Medium - To attain the desired effect (cell breakdown) a com-
bination of procedures may be useful. First homogenize the specimen in solution at
maximum recommended speed with a sharp knife blade. Then change to a dull knife
blade, add a grinding medium and run the homogenizer at 5,000 rpm for ten to fifteen
minutes.
Using Generator Probes - To facilitate homogenization of some materials, it may
be useful to pre-process the sample by using one of the techniques described above,
and then completing the process by using a generator probe. Generator probes can
achieve particle size reduction to less than 2 microns.
CAUTION: Never operate the motor with the generator probe (or sealed chamber
assembly) partially attached to the coupling adapter.
NOTE: If you experience excessive vibration, heat, or bearing wear, please contact
technical support at 1-800-776-4431.
WARNING: When processing pathogenic material in a sealed container, carefully
check seals and connections to be certain that they are not worn or leaking. A fume
hood is recommended for processing pathogens, even with a sealed container.
WARNING: Knife blades are sharp. Handle carefully to avoid injury.
CAUTION: To prevent damage to the drive mechanism, never operate the motor
without a sealed chamber assembly or generator probe installed.

13
3.3 SEALED GENERATOR PROBE ASSEMBLIES
Sealed chamber generator probe assemblies are available for use with the Omni Mixer
and Macro but are not supplied with the instrument. They consist of chambers, many
of which are fluted to facilitate mixing by inhibiting swirling, gasket screw on cover
seals to inhibit aerosol release, and a generator assembly. Chamber materials include
stainless steel, glass, polycarbonate, and polypropylene. A full range of titanium
chamber assemblies is also available for applications requiring protection from leached
elemental components, or where additional strength is a factor. Please contact Omni
International at 1-800-776-4431 for complete details.
SECTION 3. SEALED CHAMBER ASSEMBLIES
3.4 INSTALLING SEALED CHAMBER ASSEMBLIES
All chamber assemblies are easily installed to the motor unit by following these steps:
1. Attach the chamber (with adapter if required) to the cover/generator probe
assembly. Method of attachment is a left-handed screw thread. Tighten the
assembly securely.
2. Attach the chamber assembly to the motor by screwing the chamber cover into
the coupling adapter.
3. If the chamber assembly does not thread fully into the coupling adapter, then
unscrew the chamber assembly from the coupling adapter. Slightly rotate the
rotor shaft collar on the generator probe. Then return to Step 2.
4. Before operating, make sure that the chamber assembly rests securely on the
tabletop.

14
3.6 USING A COOLING VESSEL
At speeds above 5,000 rpm relatively high chamber temperatures may be caused from
friction during processing. Immersion of the chamber in an ice bath or cooling
chamber is recommended.
SECTION 3. SEALED CHAMBER ASSEMBLIES
3.5 POSITIONING THE CHAMBER ASSEMBLY
For safe operation, all sealed chamber assemblies attached to the Omni Mixer or
Omni Macro must be lowered to the table top surface as shown below.
WARNING: The Omni Mixer or Omni Macro must be operated with the chamber
assembly resting on a table top or on the bottom of a cooling container to prevent
rotating blades from being exposed if the chamber assembly becomes disengaged from
the motor, and to minimize the possibility of a broken seal.

15
SECTION 4. DISPERSATING AND IMPELLER ACCESSORIES
4.1 DISPERSATING PROBE ACCESSORIES
Dispersating probes are available for use with the Omni Mixer product line but are
not supplied with the instrument. They are specifically designed for high speed and
high shear mixing, dispersion and emulsifying. These probes provide less particle size
reduction, but greater mixing options than the generator probes described in Section
2. They can be configured to draw material from either the top or the bottom of the
processing vessel. They can be used in sealed chambers, or for added convenience, in
an open vessel environment when aerosols or sample contamination are not a
concern. Below is a list of standard available dispersating probes. An adapter, PN
15001 is required to operate probes outside of a sealed chamber. Standard material is
316 stainless steel, however, all dispersating probes can be constructed from titanium in
custom lengths or diameters as special order items.
Description Process
25mm Dispersating Probe (195mm length) Bottom Drawing
25mm Dispersating Probe (195mm length) Top Drawing
4.2 DISPERSION IMPELLER ACCESSORIES
Two inch diameter dispersion impeller blade accessories are available for the Omni
Mixer product line but are not supplied with the instrument. They are specifically de-
signed for dispersion, mixing and blending. These accessories can be used in sealed
chambers, or for added convenience, in an open vessel environment when aerosols or
sample contamination are not a concern. Below is a list of standard available dispersat-
ing probes. An adapter, PN 15001 is required to operate probes outside of a sealed
chamber. Standard material is 316 stainless steel, however, all dispersating probes can be
constructed from titanium in custom lengths or diameters as special order items.
Description Process
Clay Impeller High Shear Impeller
Rectangular Tooth Impeller High Speed Dispersing
High Vane Impeller High Pumping/Mixing
High Turbulence Impeller High Viscosity
Impellers must be matched to the following Impeller Drive Assemblies:
Description
4" long drive assembly
6" long drive assembly
8" long drive assembly

16
SECTION 5. MAINTENANCE
5.1 MOTOR DRIVE UNIT
The motor drive housing can be cleaned periodically with a mild detergent. Never use
solvents to clean the unit or accessories. While resistant to most laboratory
chemicals, care should be taken to wipe off any concentrated and potentially
damaging liquids.
Once per month the aluminum coupling adapter (see diagram in Section 1.3) of the
homogenizer should be removed and cleaned. After cleaning, a good lubricant should
be applied to the threads.
5.2 REMOVAL OF ALUMINUM COUPLING
In the event that the motor drive connect and/or the
flexible rubber coupling needs to be serviced or replaced,
the aluminum coupling can be removed using the
following procedure;
1. Unplug motor unit from the wall.
2. Insert flat edge of combination wrench
(included in motor tool kit) into the slots
of the aluminum coupling (see figure to right).
3. Using wrench for leverage, loosen aluminum
coupling by twisting it counter-clockwise.
Installation of the coupling is the reverse of these steps.
5.3 MOTOR BRUSH MAINTENANCE
To a large measure, how well your homogenizer performs its job is determined by the
condition of the carbon contact brushes (PN 61810). If brushes require replacement,
the unit may run at a reduced speed and make unusual noises, or it may run
sporadically and lose power. If this occurs with your Omni Mixer or Omni Macro,
unplug the cord, loosen the brush caps one at a time and check each brush. If the
brushes are less than 1/8" long and the ends of the brushes (which contact the
commutator) are rough and/or pitted, the brushes no longer make adequate contact
with the commutator and should be replaced (check both brushes since both brushes
generally do not wear at the same rate). If one brush is worn replace both brushes.
Make sure that the brushes are installed properly. The brushes have a curved surface
at the end which must match the curvature of the commutator. The curvature of the
commutator is the same as the curvature of the motor housing.
(continued)
Flex
Rubber
Coupling

17
SECTION 5. MAINTENANCE
If the brushes are not installed properly they will not contact the commutator and the
motor will not run. After replacing the brushes, make sure to remove the flexible
rubber coupling (see Section 5.2), place the motor on a clean surface, and run it freely
(no-load, without a generator or chamber assembly attached) for 15 to 30 minutes
before using the unit to process samples. This will allow the brushes to “seat”
properly and will extend the life of each set of brushes. This will also extend the total
life of your motor since the commutator surface will “wear” longer.
5.4 BEARINGS AND LUBRICATION
Motors are equipped with sealed ball bearings. Under normal use they require no
additional lubrication. A tube of lubricant (PN 61971) is included with every drive unit
and should be used to lubricate the threads of all connecting threaded parts, as well as
the drive pin at the tip of the floating shaft (see Section 1.3). Lubricant should not be
used to lubricate moving parts or bearings.
5.5 GROUNDING INSTRUCTIONS
In the event of a malfunction or breakdown, grounding provides a path of least
resistance for electric current to reduce the risk of electric shock. This instrument is
equipped with an electric cord which is grounded to the chassis housing. The plug
must be plugged in to an outlet that is properly installed and grounded in accordance
with all local codes and ordinances.
WARNING: DO NOT modify the plug or cord that is provided. Damaged or worn
power cords should be repaired or replaced immediately by a qualified electrician.
WARNING: Keep all housings in place and in working order. DO NOT use the
motor in a dangerous environment.. DO NOT force the unit to do a job it was not
designed to do.
WARNING: Reduce the risk of unintentional starting. Make sure that the switch is in
the “OFF” position before plugging in the motor.
CAUTION: To prevent damage to the drive mechanism, never operate the motor
without a sealed chamber assembly or generator probe installed, or the flex rubber
coupling removed from the motor.

18
SECTION 6. EXPLOSION DRAWINGS AND PART LISTS
6.1 OMNI MIXER 115V/220V
#Part Number Description
1 17003 Coupling Adapter
2 17005 Floating Drive Shaft
3 60028 Flex Rubber Coupling
4 61672 115V Mixer Motor
61707 220V Mixer Motor
5 17154 Motor Support Housing
6 175511 Motor Speed Control (115V)
17321-1 Motor Speed Control (220V)
7 17156 Speed Control Faceplate
8 61681 Speed Control Knob
9 00-109-05 5A Rocker Switch (115V)
00-109-03 3A Rocker Switch (220V)

19
SECTION 6. EXPLOSION DRAWINGS AND PART LISTS
6.2 OMNI MACRO115V/220V
#Part Number Description
1 17003 Coupling Adapter
2 17005 Floating Drive Shaft
3 60028 Flex Rubber Coupling
4 61572-1 115V Macro Motor
61507-1 220V Macro Motor
5 17571-1 Macro Adapter Plate
6 17154 Motor Support Housing
7 175511 Motor Speed Control (115V)
17321-1 Motor Speed Control (220V)
8 17156 Speed Control Faceplate
9 61681 Speed Control Knob
10 00-109-15 8A Rocker Switch (115V)
00-109-08 5A Rocker Switch (220V)

20
Do not attempt to service the Omni Mixer or Macro in a manner other than those
discussed in this manual. For any issue that is unsuccessfully corrected using this guide,
please contact your authorized dealer or call Omni International at 1-800-776-4431.
PROBLEM CORRECTIVE ACTION
The Omni Mixer/Macro is plugged in and
turned on but is not functioning.
-Check power cord connectors
-Check wall socket for power to the
outlet
Motor is turned ON and makes a makes a
“buzzing” sound, but is not working.
-Brushes may need to be replaced.
Contact Omni International at
1-800-776-4431.
Motor unit operating speed declines, stalls
intermittently, or stops completely
-Brushes may need to be replaced.
Contact Omni International at
1-800-776-4431.
Teflon bearing wears quickly -Fluid level may be too low in the tube.
-Immerse the probe deeper into the fluid.
Excessive splashing in sample tube -Fluid level too low for tube size
SECTION 7. TROUBLESHOOTING