Omni GLH User manual

REV. D
H258-GLH
OMNI GLH
GENERAL LABORATORY HOMOGENIZER
USER MANUAL
™

2
WARRANTY INFORMATION
This manual is a guide for the use of the Omni GLH, General Laboratory
Homogenizer and accessories.
Data herein has been veried 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 specied herein, con-
rmation of the validity and suitability should be obtained, otherwise
Omni International does not guarantee results and assumes no obliga-
tion 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 ONE YEAR 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. 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 specied on the
plate axed to the instrument, misuse, or abuse. Omni International
reserves the right to change, alter, modify, or improve any of its instru-
ments 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 IN-
CLUDING 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 CONNEC-
TION 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.

3
IMPORTANT SAFEGUARDS
- READ ALL INSTRUCTIONS BEFORE USING.
- SAVE THIS OWNER’S MANUAL.
The Omni GLH has 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 GLH. If you experi-
ence problems with or have questions about your Omni GLH, contact
your authorized dealer or call Omni International at 800-776-4431
or 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, re, 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.
DANGER
WARNING

4
TABLE OF CONTENTS
Warranty Information ....................................................................................... 2
Section 1 — Omni GLH, General Lab Homogenizer
1.1 Specications ........................................................................................ 5
1.2 Parts and Accessories ..................................................................... 5-6
1.3 Variable Speed Operation................................................................. 6
1.4 External Speed Control.................................................................. 6-7
1.5 Stand-Mounting the Omni GLH...................................................... 7
Section 2 — Motor Unit Maintenance
2.1 Motor Drive Unit................................................................................... 8
2.2 Brush Maintenance.............................................................................. 8
2.3 Motor Bearings ..................................................................................... 8
2.4 Storage..................................................................................................... 8
2.5 Plug Requirements.............................................................................. 9
2.6 Wiring Diagrams................................................................................... 9
2.7 Explosion Drawing.............................................................................10
2.8 Replacement Parts.............................................................................11
Section 3 — Rotor-Stator Generator Probes
3.1 Installing Rotor-Stator Generator Probes..................................12
3.2 Theory of Operation................................................................... 12-13
3.3 Operation..............................................................................................13
Section 4 — Service
4.1 Assistance .............................................................................................14
4.2 Decontamination...............................................................................14
Section 5 — Troubleshooting ......................................................................14

5
SECTION 1 — OMNI GLH, GENERAL LAB HOMOGENIZER
The Omni GLH, General Laboratory Homogenizer is a variable speed,
handheld or post-mounted homogenizer. It combines 700 watt,
28,000 rpm motor with a choice of autoclavable, rotor-stator generator
probes of various diameters. The GLH can also be used with OMNI Tip
plastic probes (A1000SB adapter required).
1.1 SPECIFICATIONS
Motor Speed: 5,000-28,000 rpm
W/ external speed control: 0 - 28,000 rpm
Capacity: 0.03 mL-10 L
Height (motor only): 22 cm (8.5 in)
Weight (motor only): 1.6 kg (56 oz)
Electrical Requirements: 115V, 60 Hz or 220 V, 50 Hz
Standards Approval/Compliance:
220V: CE Certied
1.2 PARTS AND ACCESSORIES
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 dam-
aged or missing, please contact Omni International at 1-800-776-4431.
The Omni GLH consists of the following:
Description Part Number Quantity
Motor Drive Unit (115V) GLH-01
Motor Drive Unit (220V) GLH-02
Cross Rod S00040 1
Clamp FS1002 1
Tool Kit T1001 1
Instruction Manual H258-GLH 1
Also available, but not supplied with the instrument:
Description Part Number
Stand Assembly* S1000
External Speed Control (115V) SC115
External Speed Control (220V) SC220
Vessel Restraint Disk LT-750
* The stand assembly includes a base plate and a 24” post.

6
SECTION 1 — OMNI GLH, GENERAL LAB HOMOGENIZER
1.3 VARIABLE SPEED OPERATION
The speed of the Omni GLH may be regulated by means of a variable
rotary switch located at the top of the unit. Speed settings below are
approximate, and are based on running a 35mm probe in water. Actual
speed will vary with probe size and sample processed.
Speed Setting Approximate Speed
1 4,000
2 5,000
3 7,500
4 10,000
5 13,500
6 25,000
1.4 EXTERNAL SPEED CONTROL
For greater precision, range (0–28,000 rpm), or remote operation
(such as for fume hood or cold room applications) the optional
external speed control is recommended. To operate the Omni GLH
with the external speed control:
1. Make certain that both the external speed control
and the Omni GLH are in the OFF position.
2. Plug the speed control into an external power source.
3. Plug the Omni GLH into the rear of the speed control unit.
4. Set the speed control knob on the Omni GLH to 6
(the maximum setting).
The Omni GLH can now be operated via the external speed control dial.
Select the optimal speed for each dierent combination of sample and
generator for best processing results.
The table on page 7 is a good approximation guide for operating speed.

7
SECTION 1 — OMNI GLH, GENERAL LAB HOMOGENIZER
The table was constructed by running a 35mm generator probe in
water. At no load, top motor speed is higher. Load, increasing viscosity,
size of generator probe, line voltage, and the type of sample may all
aect top speed of the motor.
Speed Setting With Speed Control
1 700
2 3,000
3 6,000
4 9,000
5 12,000
6 14,000
7 17,000
8 20,000
9 24,000
10 28,000
1.5 STAND-MOUNTING THE OMNI GLH (Optional)
To mount the Omni GLH to the stand assembly,
refer to the gure and follow these steps:
1. Secure the 24”post by twisting it
into the base plate and locking
jam nut at the base of the post.
2. Loosen the locking knob and
slide the post clamp assembly
down over the end of the post
until the clamp is at the desired
height and lock in place.
3. Twist the cross rod into the back
of the motor housing until tight.
4. Loosen the second knob on the
post clamp assembly and insert
the cross rod with motor at-
tached (approximately 1”of the
cross rod should protrude from
the back of the post clamp).
5. Lock in place.
Variable Speed
Control Switch
24” Post
Post Clamp
Assembly
Locking Knob
Cross Rod
Power Switch
Base Plate
Assembly
Breaker

8
SECTION 2 — MOTOR MAINTENANCE
2.1 MOTOR DRIVE UNIT
The Motor drive housing should be wiped o after use, especially
when concentrated and potentially damaging liquids are used during
processing. Never use solvents to clean unit or accessories.
2.2 BRUSH MAINTENANCE
If the performance of your Omni GLH begins to deteriorate in any of
the following ways:
• The operations speed begins to decline
• The unit stalls intermittently
• The unit stops working all together
It probably requires a new set of brushes. The average brush life for
the Omni GLH is 150 hours. For service, or brush replacement, please
contact Omni International at 1-800-776-4431.
2.3 MOTOR BEARINGS
The Omni GLH motor is equipped with sealed ball bearings. Under
normal use they require no additional lubrication.
2.4 STORAGE
WARNING: Keep all housings in place and in working order.
WARNING: Remove all tools from the generator probe before turning
the motor on.
WARNING: DO NOT use the motor in a dangerous environment.
WARNING: Disconnect the motor before servicing, and when chang-
ing the generator probe.

9
SECTION 2 — MOTOR MAINTENANCE
2.5 PLUG REQUIREMENTS
This instrument is equipped with an electric cord and housing which is
double insulated. The unit must be plugged into a polarized 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. If the plug will
not t the outlet, have the proper outlet installed by a qualied electrician.
WARNING: Reduce the risk of unintentional starting; make sure the
speed switch is in the OFF position before plugging in the motor.
WARNING: Improper connection of the equipment can result in a risk
of electric shock.
WARNING: Damaged or worn power cords should be repaired or
replaced immediately by a qualied electrician.
2.6 WIRING DIAGRAMS

10
SECTION 2 — MOTOR MAINTENANCE
2.7 EXPLOSION DRAWING

11
SECTION 2 — MOTOR MAINTENANCE
2.8 TABLE OF REPLACEMENT PARTS FOR THE OMI GLH
NO. DESCRIPTION 115V 220V
1* Aluminum Washer 63802 63802
2* Wave Spring H11543 H11543
3* Aluminum Washer 63802 63802
4 Self Tapping Screw, Mod 65901-1 65901-1
6* Set Screw 10-32 x 1/4 5903 5903
7* Lower Coupling GLH-04-01 GLH-04-01
8** GLH Drive Connect GLH1155L GLH1155L
9** Collect Nut 50005 50005
10** SS Bearing, GLH/5100 50002 50002
11** Armature GLH-07-01 GLH-07-01
12** Commutator Bearing GLH115221 GLH115221
13 Bearing Mount GLH115220 GLH115220
14 SS Screw GLH115222 GLH115222
15 Field Assembly GLH11530 GLH2210
16 Motor Housing GLH115218 GLH115218
17 Filter Assembly (230V only) N/A GLH2201
18 Base Brush Holder GLH115213 GLH115213
19 Armature Brush GLH115217 GLH2211
20 Spring for Brush GLH115216 GLH115216
21 Screw GLH115215 GLH115215
22 VS Switch GLH115210 GLH115210-220
23 Switch GLH11525 GLH11525
24 Dust Shield GLH11526 GLH11526
25 Switch/Button Slide GLH11527 GLH11527
26 Sealcon Strain Relief Nut GLH11514 GLH11514
27 4A Circuit Breaker (115V only) GLH2207 N/A
28 Motor Housing Cap- Painted GLH11524 GLH11524
29 SS Screw GLH11523 GLH11523
30 Sealcon Strain Relief GLH11513 GLH11513
31 Powercord FGLH1151 FGLH1151
*Part also included in assembly number GLH1154-ASY
**Part also included in assembly number GLH1169 (115V) or GLH2269 (230V)

12
SECTION 3 — ROTOR-STATOR GENERATOR PROBES
3.1 INSTALLING ROTOR-STATOR GENERATOR PROBES
Rotor-stator generator probes are easily installed to the Omni GLH
motor by means of a quarter-turn bayonet mount. Simply push the
generator probe into the motor housing as far as possible, turn clock-
wise, and release. Remove the blue protective cap from the tip of the
generator probe and the Omni GLH is ready to operate.
CAUTION: Replace the blue protective cap on the end of the generator
probe when the generator probe is not being used.
WARNING: The tip of a saw tooth generator probe is sharp.
3.2 THEORY OF OPERATION
The rotor shaft is coupled directly to the drive motor, via the drive pin.
When attached to the Homogenizer motor, the rotor shaft can spin up to
28,000rpm. This assembly makes up the rotor portion of the rotor-stator
generator probe. The tube and collar assembly is attached to the motor
housing, but does not spin. This is the stator portion of the rotor-stator
generator probe. As the rotor knife spins within the tube and collar
assembly, it creates a pumping action, pulling the sample into the open
end of the generator probe and forcing the sample out through the win-
dows in the tube. The interaction of the rotor knife with these windows
sets up a shearing action, reducing the particle size of the sample. The
speed dierential between the rapidly moving portion and the relatively
stationary of the sample sets up a second force called cavitation pulls the
sample apart, further reducing the particle size.
The processing eciency can be aected by:
• Amount of material processed vs. size and speed of the generator probe.
• Container geometry and size (round vessels encourage swirling,
while uted or cornered vessels disrupt ow patters for more eec-
tive mixing/ processing).
• Processing speed vs. optimal speed.
• Size and type of material and ow characteristics (material parti-
cles must be small enough to be carried into the generator head
for optimal processing).

13
SECTION 3 — ROTOR-STATOR GENERATOR PROBES
The upper hole of the tube and collar assembly should be left un-
blocked to allow the sample to circulate through the generator probe.
3.3 OPERATION
Insert the generator probe into the Omni GLH motor and remove the
blue protective cap from the end of the generator probe. The depth of
the generator probe in the sample vessel can signicantly aect ow
patterns within the vessel. This also aects processing eciency. As a
rule of thumb, the generator probe usually operates most eciently
at a depth of 1/3 (to 1/2) of the liquid height. Heavy sediments may
require deeper immersion, and this processing depth can be optimized
by observing ow patterns and related processing results. While pro-
cessing, liquid can circulate through the two holes at the bottom of the
generator probe. The top hole should not be immersed in the sample.
Blocking the upper hole could result in liquid being drawn into the
lower motor bearing.
CAUTION: Do not operate the unit without immersing the bottom
of the generator probe in liquid or the sample being processed
in order to avoid premature failure of the lower bearing.
WARNING: Reduce the risk of unintentional starting; make sure that
the variable speed switch is in the OFF position prior to plugging in the
unit.
WARNING: DO NOT process pathogenic material in an open container,
since aerosols created during normal processing could be inhaled by
the operator.

14
SECTION 4 — SERVICE
4.1 ASSISTANCE
Should this product ever require service, please contact
Omni International at 1–800–776-4431.
4.2 DECONTAMINATION
Should an instrument or component that has been used with radioac-
tive or pathogenic material require factory or eld service, comply with
the following procedure to ensure the safety of service personnel:
• Clean the parts to be serviced of all encrusted material and de-
contaminate them. There must be no radioactivity detectable by
survey equipment.
• Obtain a Decontamination Certicate from Omni International.
Complete the certicate and attach to the instrument or parts
being returned.
If no Decontamination Certicate is attached, and a potential radioac-
tive or biological hazard is detected or suspected by Omni Internation-
al, the equipment will not be serviced until proper decontamination
and certication is complete. The sender will be contacted for instruc-
tions as to the disposition of the equipment. Disposition costs will be
borne by the sender.
WARNING: It is a violation of federal law to transport biologically
hazardous or radioactive materials without proper packaging, labeling,
and appropriate warnings.

15
SECTION 5 — TROUBLESHOOTING
Do not attempt to service the Omni GLH 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 GLH 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.
- Check that the brushes are not
worn and are correctly installed.
Replace if necessary.
(see Section 2.2)
Motor unit operating speed
declines, stalls intermittently, or
stops completely
- Check that the brushes are not
worn and are correctly installed.
Replace if necessary.
(see Section 2.2)
Excessive noise during
normal operation
- Check the condition of the PTFE
bearing and replace if needed
(see Section 3.5).
Excessive noise during run-in of a
new bearing
- Turn the Omni GLH OFF and
return to step B of Section 3.5
Teon bearing wears quickly - Fluid level may be too low
in the tube.
- Immerse the probe deeper
into the uid.
Excessive splashing in sample tube - Fluid level too low for tube size
Motor won’t start or shuts o
while processing
- Press down on the breaker
(115v only)

www.omni-inc.com
OMNI GLH
GENERAL LAB HOMOGENIZER
™
Omni International, Inc.
935C Cobb Place Blvd.
Kennesaw, GA 30144
800.776.4431 
770.421.0058