12 /8 /1 0
2
General Specifications ........................................................................................................................................3
D
eclaration of Conformity ..............................................................................................................................3
Environmental Conditions ..............................................................................................................................3
Safety Information ..............................................................................................................................................4
Important Information ......................................................................................................................................4
Warnings ..........................................................................................................................................................4
Introduction..........................................................................................................................................................5
Intended Use ..................................................................................................................................................5
Principles of Operation ..................................................................................................................................5
Installation ..........................................................................................................................................................6
Unpackaging ....................................................................................................................................................6
Site Selection: ..................................................................................................................................................6
Specifications ..................................................................................................................................................6
Operation ............................................................................................................................................................7
Power Switch: ..................................................................................................................................................7
Speed Control: ................................................................................................................................................7
Maintenance and Servicing ................................................................................................................................8
To Replace the Power Switch: ........................................................................................................................8
To Replace Rheostat (Speed Control): ............................................................................................................8
To Replace Microswitch: ..................................................................................................................................9
To Replace Motor:..........................................................................................................................................10
To Replace Damper Springs: ........................................................................................................................11
To Replace Mixing Surface Disc: ..................................................................................................................12
To Install Single Cup Mixing Head: ..............................................................................................................12
Problem Solving Guide ....................................................................................................................................13
Replacement Parts List ....................................................................................................................................14
Ordering Procedures ........................................................................................................................................14
Exploded View ..................................................................................................................................................15
One Year Limited Warranty ..............................................................................................................................16
Table of Contents
Thermo Fisher Scientific
Robert-Bosch-Strasse 1,D-63505
Langenselbold,Germany.
4
Important Information
Your Thermo Scientific Maxi Mix II Vortex Mixer has been
designed with function, reliability, and safety in mind. It is
your responsibility to install it in conformance with local electrical codes.
This manual contains important operating and safety information. You must carefully read and understand the contents
of this manual prior to the use of this equipment. For safe
operation, please pay attention to the alert signals throughout the manual.
Warnings
To avoid electrical shock, always:
1. Use a properly grounded electrical outlet of correct voltage and current handling capacity.
2. Disconnect from power supply before servicing.
To avoid personal injury:
1. Do not use in the presence of flammable or combustible materials; fire or explosion may result.
This device contains components which may
ignite such materials.
2. Do not turn on mixer unless the speed control is
turned to minimum; failure to do so may cause
accessories and vessels to be thrown off the
mixer.
3. Refer servicing to qualified personnel.
Safety Information
Warning
Warnings alert you to a possibility of personal injury.
Caution
Cautions alert you to a possibility of
damage to the equipment.
Note
Notes alert you to pertinent facts and
conditions.
Alert Signals
5
Intended Use
The Type M37600 vortex mixers are general laboratory
vortex mixers. They are intended for applications where
vortexing of single or multiple tubes is required. Vessels
with closure tops up to a maximum of 125 ml can also be
vortexed.
The unit consists of 1) a mixing surface disc, 2) a threeposition power switch and, 3) an adjustable speed control
(See Figure 1).
Principles of Operation
The mixer incorporates a permanently lubricated motor to
drive the mixing platform. A three-position power switch
enables the mixer to be operated continuously or by
depression of the silicone rubber top. The speed of the
mixer is regulated by an adjustable rheostat. Also, suction
cup feet are incorporated to prevent unit movement.
Figure 1: Maxi-Mix II
Three-position power switch
Mixing surface disc
Adjustable speed control
Introduction
6
Unpackaging
Unpack Maxi-Mix II from box. An interchangeable rubber
cup for mixing test tubes and a replacement mixing surface
disc are included in the box.
Site Selection
Place mixer on a sturdy flat surface.
Specifications
The electrical specifications are located on the specification plate on the back of the unit. Consult customer service
if your electrical service is different than those listed on the
specification plate.
Installation
Weight Dimensions Electrical
(lbs.) (Inches)
Model No. Net Ship HLTop Diameter Volts Amps Hz
M37615 676” 7” 3.5” 120 .45 50/60
M37610-33 676” 7” 3.5” 230 .20 50
M37610-33CN 676” 7” 3.5” 230 .20 50
M37614 676” 7” 3.5” 100 .56 50/60
Warning
Use a properly grounded electrical
outlet of correct voltage and current
handling capacity.
Do not use in the presence of flammable or combustible materials; fire
or explosion may result. This device
contains components which may
ignite such materials.
Note
Some misalignment of the motor
bearings in this product may have
occurred during shipping and handling. Prior to first use, the mixer
should be run at maximum speed for
10 minutes to realign the motor
bearings.
Specifications
7
Power Switch:
T
he power switch is a combination ON/OFF and mode
switch to enable TOUCH operation. Move the power switch
to either the “FULL” position or the “TOUCH” position. In
the “FULL” position, the mixing head will begin oscillating
automatically. In the “TOUCH” position, the mixing head
will oscillate when it is depressed.
Speed Control:
The speed control is a nonlinear type control. The oscillating speed will increase at a non-uniform rate as the control
is turned clockwise.
To operate Maxi-Mix, move power switch to either the
“FULL” position or the “TOUCH” position. Turn speed control to the desired setting. Touching the vessel to the disc
will initiate the vortex action. Mixing action will intensify as
greater pressure is exerted against the mixing surface. To
stop the mixing action, remove vessel from disc or move
the power switch to the “OFF” position. (See Maintenance
and Servicing for installation of the single cup mixing head
and the mixing surface disc).
Operation
W
arning
Do not turn the mixer on unless the
speed control is turned to minimum;
failure to do so may cause accessories and vessels to be thrown off
the mixer.
Note
There is no absolute limit on the
maximum size of vessel which can
be used; much depends on technique, the shape of the vessel, the
viscosity of the contents, and the
amount of liquid. (Vessels require
closure tops to prevent contents
from being spilled out during mixing). As a general rule, do not vortex
vessels larger than 250 ml and volumes greater than 125 ml.
Note
Unit may need some loading to slow
the motor when going from fast to
slow.
Note
If the equipment is used in a manner
not specified by the manufacturer,
the protection provided by the equipment may be impared.
8
To Replace the Power Switch:
a) Disconnect mixer from power supply.
b) Peel off the mixing surface disc. Hold the mixing
platform to keep from turning and remove the
platform from the counterweight assembly.
c) Turn mixer upside down and remove the four
screws securing plastic housing. Turn mixer
upright and remove housing.
d) Desolder four wires from switch. Identify or
mark wires disconnected to insure proper
placement and connection when reinstalling.
e) Remove defective switch.
f) Install new switch with the number “3” terminal
on top. Resolder the wires as identified or
marked in Step (d).
g) Reinstall plastic housing and secure with four
screws.
h) While holding the mixing platform to keep it from
turning, secure the platform to the counterweight assembly. If the mixing surface is in
good condition, reapply it to the mixing platform.
i) Reconnect mixer to power supply.
To Replace Rheostat (Speed
Control):
a) Disconnect mixer from power supply.
b) Peel off the mixing surface disc. Hold the mixing
platform to keep from turning and remove the
platform from the counterweight assembly.
c) Turn mixer upside down and remove the four
screws securing plastic housing. Also, remove
two screws securing dial plate.
d) Turn mixer upright and remove the housing.
Maintenance and Servicing
W
arning
Disconnect from power supply before
servicing.
Refer servicing to qualified personnel.
9
e) Desolder the two wires from rheostat. Identify or mark
wires disconnected to insure proper placement and
connection when reinstalling.
f) Loosen set screw on knob and remove knob. Remove
lock nut from rheostat and remove defective rheostat.
g) Insert new rheostat into dial plate and secure with lock
nut. Resolder the wires as identified or marked in Step
(e).
h) Turn rheostat shaft fully counterclockwise and slide
knob over shaft. Align the pointer on knob with the edge
of the graduated band. Secure knob with set screw.
i) Secure dial plate to base.
j) Reinstall plastic housing and secure with four screws.
k) While holding the mixing platform to keep it from turning,
secure the platform to the counterweight assembly. If
the mixing surface is in good condition, reapply it to the
mixing platform.
l) Reconnect mixer to power supply.
To Replace Microswitch:
a) Disconnect mixer from power supply.
b) Peel off the mixing surface disc. Hold the mixing plat-
form to keep from turning and remove the platform from
the counterweight assembly.
c) Turn mixer upside down and remove four screws secur-
ing plastic housing.
d) Turn mixer upright and remove the housing.
e) Remove the four screws holding the motor to the rubber
mounts. Position motor on its side.
f) Desolder the two wires from microswitch and remove
MA
INTENANCE ANDSERVICING
10
microswitch from motor. Save the spring and plunger
from defective microswitch. Identify or mark wires dis-
connected to insure proper placement and connection when reinstalling.
g) Insert spring and plunger into the shaft of the new
microswitch. Position microswitch on mounting studs
and secure with two screws. Resolder the wires as identified or marked in Step (f).
h) Reposition motor and secure with four screws.
i) Reinstall plastic housing and secure with four screws.
j) While holding the mixing platform to keep it from turn-
ing, secure the platform to the counterweight assembly.
If the mixing surface is in good condition, reapply it to
the mixing platform.
k) Reconnect mixer to power supply.
To Replace Motor:
a) Disconnect mixer from power supply.
b) Peel off the mixing surface disc. Hold the mixing plat-
form to keep from turning and remove the platform from
the counterweight assembly.
c) Turn mixer upside down and remove four screws secur-
ing plastic housing.
d) Turn mixer upright and remove the housing.
e) Desolder the two wires from motor. Identity or mark
wires disconnected to insure proper placement and
connection when reinstalling.
f) Remove the counterweight assembly, brackets and
damper springs from top of motor.
g) Remove the motor and then the microswitch assembly
from bottom of motor.
h) Reinstall the components removed in Steps (f) and (g)
to the new motor.
MA
INTENANCE ANDSERVICING
11
i) Resolder the wires as identified or marked in Step (e).
j) Reinstall plastic housing and secure with four screws.
k) While holding the mixing platform to keep it from turn-
ing, secure the platform to the counterweight assembly. If the mixing surface is in good condition, reapply
it to the mixing platform.
l) Reconnect mixer to power supply.
To Replace Damper Springs:
a) Disconnect mixer from power supply.
b) Peel off the mixing surface disc. Hold the mixing plat-
form to keep from turning and remove the platform
from the counterweight assembly.
c) Turn mixer upside down and remove four screws
securing plastic housing.
d) Turn mixer upright and remove housing.
e) Remove defective damper springs.
f) Install new damper springs.
g) Reinstall plastic housing and secure with four screws.
h) While holding the mixing platform to keep it from turn-
ing, secure the platform to the counterweight assembly. If the mixing surface is in good condition, reapply
it to the mixing platform.
i) Reconnect mixer to power supply.
To Replace Mixing Surface Disc:
a) Disconnect mixer from power supply.
b) Peel off old mixing surface disc and clean the bonding
area.
MA
INTENANCE ANDSERVICING
12
c) Remove the paper backing from the new mix-
ing surface disc and apply.
d) Reconnect mixer to power supply.
To Install Single Cup Mixing
Head:
a) Disconnect mixer from power supply.
b) Peel off mixing surface disc and while holding
the mixing platform to keep from turning,
remove mixing platform.
c) While holding the rubber mixing cup to keep
from turning, install the single cup mixing head
with the hold down screw.
d) Reconnect mixer to power supply.
MA
INTENANCE ANDSERVICING
Wiring Diagram
The Problem Solving tips section is intended to aid in defining and correcting possible service problems.
When using the guide, select the problem category that resembles the malfunction, then proceed to the possible causes category and take necessary corrective action.
13
Problem
Possible Causes
Corrective Action
Mixer doesnʼt operate when
power switch is in the “Full
On” position.
Check mixer connections to
power supply.
Replace power switch.
Replace speed control.
Replace motor.
Mixer doesnʼt operate when
power switch is in the “Touch
On” position and the disc is
depressed.
Not connected to power supply.
Defective microswitch.
Speed control at minimum
setting and too much pressure on disc.
Defective speed control.
Defective motor.
Check mixer connections to
power supply.
Replace microswitch.
Turn speed control to higher
setting.
Replace speed control.
Replace motor.
Mixer doesnʼt operate when
power switch is in either “ON”
position.
Check mixer connections to
power supply.
Replace power switch.
Replace speed control.
Replace motor.
Speed control doesnʼt regulate speed.
Internal chattering noise.
Defective speed control.
Going from fast to slow
Replace speed control.
Load the unit to slow the
motor.
Defective spring damper links.
Replace spring damper links.
Not connected to power
supply.
Defective power switch.
Defective speed control.
Defective motor.
Not connected to power
supply.
Defective power switch.
Defective speed control.
Defective motor.
Problem Solving
Thermo Fisher Scientific
Robert-Bosch-Strasse 1,D-63505
Langenselbold,Germany.
943-2006 or 800-926-0505
800-
15
Exploded View
Exploded View
800-926-0505.
800-
800-926-0505.
800-943-2006 or 800- 92 6- 05 05 .
North America: USA/Canada +1 86 6 98 4 37 66 ( 86 6- 9- TH ER MO ) ww w.t he rm o. co m
Europe: Austria +43 1 801 40 0, Belgi um + 32 2 4 82 3 0 30 , Fr an ce + 33 2 2 80 3 21 80 , Ge rm an y
national toll free 08001-536 376 ,
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571 4440, Nordic/Baltic countries +358 9 329 1 00 ,
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