Vari-Mix Aliquot Mixer

Type 48700

LT1108X1 • 3/30/10

Operation Manual

and Parts List

Model

M48725

M48720-33

M48720-33CN

Voltage

120

220-240

220-240
2

Table of Contents

Safety Information ..............................................................................................................................................3

Alert Signals ........................................................................................................................................................3

Warnings ............................................................................................................................................................3

Introduction..........................................................................................................................................................4

Important Information......................................................................................................................................4

Intended Use ..................................................................................................................................................4

General Usage................................................................................................................................................4

Function ..........................................................................................................................................................4

Principles of Operation ..................................................................................................................................4

Installation and Operation ..................................................................................................................................5

Installation ......................................................................................................................................................5

Operation ........................................................................................................................................................5

Speed and Tilt Adjustment..............................................................................................................................5

Operational Precautions and Limitations ............................................................................................................6

Maintenance and Servicing ................................................................................................................................7

General Cleaning............................................................................................................................................7

Performance Characteristics and Specifications ................................................................................................8

Environmental Conditions ..............................................................................................................................9

Declaration of Conformity ..............................................................................................................................9

Replacement Parts List ....................................................................................................................................10

Ordering Procedures ........................................................................................................................................11

Warranty ............................................................................................................................................................12
3

Warnings

Your Thermo Scientific Vari-Mix Aliquot Mixer has

been designed with function, reliability and safety

in mind. It is your responsibility to install it in conformance with local electrical codes, For safe

operation, please pay attention to the alert boxes

throughout the manual.

To avoid electrical shock, always:

1. Use a properly grounded electrical outlet

of correct voltage and current handling

capacity.

2. Disconnect from the power supply prior to

maintenance and 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. Refer servicing to qualified personnel.

Safety Information

Caution

Cautions alert you to a possibility of damage to the equipment.

Warning

Warnings alert you to a possibility of personal injury.

Note

Notes alert you to pertinent

facts and conditions.

Alert Signals

Warning

In the event of power loss to the

branch circuit during operation,

flip the switch to “0” or unplug

the unit. Failure to do so will

result in resumption of operation

at an unexpected moment leading to possible injury and/or

breakage.

Note

The power cord serves as the

main disconnect. Be certain

access to the wall connection is

not obstructed.
4

Introduction

Congratulations on your purchase of a Vari-Mix

Aliquot Mixer.

Important Information

This manual contains important operating and

safety information. You must carefully read and

understand the contents of this manual prior to

using this equipment.

Intended Use

This unit is designed to provide gentle but thorough mixing of in vitro specimens.

General Usage

Do not use this product for anything other than

its intended use.

Function

Test tube specimens are placed in the grooves

of the white silicone pad which is mounted on

the platform. The platform rocks at a constant

speed to provide gentle and thorough mixing

action of vessel contents.

Principles of Operation

The top plate rocks in a cyclic 48° maximum

motion at up to 20 rpm and is driven by a variable speed DC gear motor through an eccentric drive shaft, adjustment knob and linkage

assembly.
5

Installation and Operation

Installation

1. Remove the Vari-Mix from the carton.

Check electrical specifications and plug

into a properly grounded receptacle.

Operation

2. Place tubes in grooves of white silicone

pad. Tubes should be centered for balanced mixing. On the side without ridges,

the reversible pad will accept tubes over

125 mm in length. The side with ridges

will accept tubes less than 125 mm in

length.

3. Turn switch ON for mixing action.

4. Adjust speed and amount of tilt to suit

your application by following the Speed

and Tilt Adjustment instructions.

Speed and Tilt Adjustment

The speed of the top plate motion can be adjusted to any speed between approximately 2 rpm

and 20 rpm by using the rheostat on the front of

the unit. Check using a stopwatch to count cycles

during a 1 minute period.The degree of rocking

tilt can be adjusted between 1° and 48° with the

unit running.

1. Locate the rotating knob on the right end

of the unit.

2. Grab and hold the knob, manually stopping the rotation of the knob. The platform will continue to move.

Warning

Use a properly grounded electrical outlet of correct voltage and

current handling capacity.

Warning

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

If unit fails to rock, check the

setting of the knob located on

the right hand side of the unit,

which establishes the degree of

rocking motion desired. This

knob may be set in a neutral

position, preventing platform

from rocking. Refer to Speed

and Tilt Adjustment.

Note

If the equipment is used in a manner

not specified by the manufacturer,

the protection provided by the equipment may be impared.
6

3. When the platform achieves the degree of

tilt that you desire for your rocking motion,

release the knob. The unit will now tilt that

amount on each side every cycle.

Operational Precautions and

Limitations

1. Do not overload by weight. Loads over 1 1/4

lbs. may cause jerky rocking action or change

the degree of motion.

2. Wash white silicone pad with soap and water

and rinse when needed to assure friction-grip

quality of pad.

INSTALLATION AND OPERATION
7

1. The drive motor does not require lubrication; however, the shaft and bearing couplings should be greased semi-annually

when in constant use. See illustration for

location.

2. Jerky rocking motion without a load indicates either the shaft needs lubrication or

motor replacement is necessary.

3. Failure of unit to operate when plugged in

with toggle switch “ON” indicates defective toggle switch, malfunctioning drive

motor, disengaged linkage or degree of

motion knob set to neutral position.

4. Spontaneous change of the degree of

motion indicates the drive shaft, o-ring or

adjustment knob should be replaced.

5. To replace o-ring, remove adjustment

knob by removing right hand cover plate,

crank link and shoulder bolt in center of

adjustment knob.

General Cleaning Instructions

Wipe exterior surfaces with lightly dampened

cloth containing mild soap solution. Wash white

silicone pad with soap and water and rinse.

Maintenance and Servicing

Warning

To avoid electrical shock,

always disconnect from power

supply before maintenance and

servicing. Refer servicing to

qualified personnel.

Caution

Do not put any lubricant on

o-ring.
8

Performance Characteristics

and Specifications

Model M48725 M48720-33 & M48720-33CN

Volts 120 240

Amps .05 .02

Hz 50/60 50

Watts 3 3

Design Designed for continuous service. Designed for continuous service.

Tube Diameter 6 mm to 20 mm 6 mm to 20 mm

Tube Length Up to 150 mm Up to 150 mm

Tube Capacity 16 16

Pad Dimensions 4-1/2” x 12” 4-1/2” x 12”

Ambient Operating Temperature -4°C - 60°C -4°C - 60°C

Ambient Relative Humidity 80% 80%

Maximum Weight Capacity of Load 1-1/4 lbs. 1-1/4 lbs.
9

Environmental Conditions

Operating: -4° - 60°C; 20% to 80% relative humidity, non-condensing. Installation

Category II (overvoltage) in accordance with IEC 664. Pollution degree 2 in

accordance with IEC 664.

Altitude limit: 2,000 meters

Storage: -25°C to 65°C; 10% to 85% relative humidity.

Declaration of Conformity

We hereby declare under our sole responsibility that this product conforms with the technical requirements of

the following standards:

EMC: EN 61000-3-2 Limits for Harmonic Current Emissions

EN 61000-3-3 Limits for Voltage Fluctuations and Flicker

EN 61326-1 Electrical Equipment for Measurement, Control, and Laboratory Use; Part I:

General Requirements

Safety: EN 61010-1 Safety Requirements for Electrical Equipment for Measurement, Control and

Laboratory Use; Part I: General Requirements

EN61010-2-051 Part II: Particular requirements for laboratory equipment for the heating of

materials

per the provisions of the Electromagnetic Compatibility Directive 2004/108/EC, and per the provisions of the

Low Voltage Directive 2006/95/EC.

The authorized representative located within the European Community is:

Thermo Fisher Scientific

Electrothermal House

Unit 12A

Purdeys Industrial Estate

Purdeys Way

Rochford, Essex, SS4 1ND

United Kingdom

Tel: +44(0)1702 303350

Copies of the Declaration of Conformity are available upon request.

PERFORMANCE CHARACTERISTICS AND SPECIFICATIONS
10

Replacement Parts List

Part No. Description

PC1108X2 Circuit Board Assembly

SWX135 Switch 120V

SWX136 Switch 240V

RS487X1A Rheostat Assembly

PT261X1 White Silicone Pad Tube Holder

MT1108X1 Motor Assembly w/Wire Leads

CUX4 Coupling w/Set of Screws

SF487X1 Shaft, Eccentric Less O-Ring

GSX8 O-Ring

KB487X1 Adjustment Knob

LN487X1 Crank Link

FS487X1 Socket Head Shoulder Bolt

CR1105X1 Cord Set (for Model M48725)

CR1108X1 Cord Set (for Model M48720-33)

CRM1862X1 Cord Set (for Model M48720-33CN)

PT261X3B Top Plate Rocker Assembly w/Drive Pin

FZX35 1/2 Amp (.500 MA 250V), Type T
11

Ordering Procedures

Please refer to the Specification Plate for the complete

model number, serial number, and series number when

requesting service, replacement parts or in any correspondence concerning this unit.

All parts listed herein may be ordered from the Thermo

Scientific dealer from whom you purchased this unit or

can be obtained promptly from the factory. When service

or replacement parts are needed we ask that you check

first with your dealer. If the dealer cannot handle your

request, then contact our Customer Service Department

at 1-866-9-thermo.

Prior to returning any materials, please contact our

Customer Service Department for a “Return Materials

Authorization” number (RMA). Material returned without

an RMA number will be refused.
One Year Limited Warranty

This Thermo Scientific product is warranted to be free of defects in materials and workmanship for one (1)

year from the first to occur of (i) the date the product is sold by the manufacturer or (ii) the date the product is

purchased by the original retail customer (the “Commencement Date”). Except as expressly stated above, the

MANUFACTURER MAKES NO OTHER WARRANTY, EXPRESSED OR IMPLIED, WITH RESPECT TO THE

PRODUCTS AND EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES, INCLUDING BUT NOT LIMITED

TO, WARRANTIES OF DESIGN, MERCHANT ABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

An authorized representative of the manufacturer must perform all warranty inspections. In the event of a

defect covered by the warranty, we shall, as our sole obligation and exclusive remedy, provide free replacement parts to remedy the defective product. In addition, for products sold within the continental United States

or Canada, the manufacturer shall provide free labor to repair the products with the replacement parts, but

only for a period of ninety (90) days from the Commencement Date.

The warranty provided hereunder shall be null and void and without further force or effect if there is any (i)

repair made to the product by a party other than the manufacturer or its duly authorized service representative, (ii) misuse (including use inconsistent with written operating instructions for the product), mishandling,

contamination, overheating, modification or alteration of the product by any customer or third party or (iii) use

of replacement parts that are obtained from a party who is not an authorized dealer of Thermo Scientific products.

Heating elements, because of their susceptibility to overheating and contamination, must be returned to the

factory and if, upon inspection, it is concluded that failure is due to factors other than excessive high temperature or contamination, the manufacturer will provide warranty replacement. As a condition to the return of any

product, or any constituent part thereof, to the factory, it shall be sent prepaid and a prior written authorization

from the manufacturer assigning a Return Materials Number to the product or part shall be obtained.

IN NO EVENT SHALL THE MANUFACTURER BE LIABLE TO ANY PARTY FOR ANY DIRECT, INDIRECT,

SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, OR FOR ANY DAMAGES RESULTING FROM

LOSS OF USE OR PROFITS, ANTICIPATED OR OTHERWISE, ARISING OUT OF OR IN CONNECTION

WITH THE SALE, USE OR PERFORMANCE OF ANY PRODUCTS, WHETHER SUCH CLAIM IS BASED ON

CONTRACT, TORT (INCLUDING NEGLIGENCE), ANY THEORY OF STRICT LIABILITY OR REGULATORY

ACTION.

For the name of the authorized Thermo Scientific product dealer nearest you or any additional information, contact us:

308 Ridgefield Court, Asheville, NC, 28806 USA

Phone: 1-866-984-3766

Fax: 1-828-665-4071

Web: www.thermo.com