VWR International 250V User manual

1
Instruction Manual
250V Power Supply
A high current power supply for SDS-PAGE and DNA/RNA
electrophoresis applications
North America Catalog Number
US Cord: 93000-746
European Article Numbers:
Euro Cord: 700-0115
UK Cord: 700-0116
Swiss Cord: 700-0117
Copyright May 2007 VWR Version 1

2
Table of Contents
FCC Warning 3
Safety Information 3
Package Contents 4
Product Specifications 5
Overview 6
Description of Buttons and Switches 7
Flowchart 8
Getting Started 10
Important Guidelines 10
Operation 12
Choosing Limiting Parameter Settings 14
Troubleshooting 16
Operational electrical Parameters 17
Repair and Maintenance of 300V Power Supply 18
Technical Service 19
Warranty 19
Equipment Disposal 20

3
Warning
Federal Communications Commission Advisory
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area is likely
to cause harmful interference in which case the user will be required to correct the interference
at their expense. Changes or modifications not expressly approved by the party responsible
for compliance could void the user’s authority to operate the equipment.
Safety Information
Avoiding Electrical Shock
The 250V Power Supply produces up to 3 A or 250 voltage outputs which are electrically
isolated from ground to reduce the risk of electrical shock to the user. Follow the guidelines
below to ensure safe operation of the unit.
The 250V Power Supply has been designed for use with electrophoresis cells with shielded
banana plugs thus minimizing any potential shock hazard to the user. VWR recommends
against the use of unshielded banana plugs.
To avoid electrical shock:
1. NEVER connect or disconnect wire leads from the power jacks when the red indicator light
at the Start/Stop key is on or when “RUNNING”is displayed on the screen.
2. WAIT at least 5 seconds after stopping a run before handling output leads or connected
apparatus.
3. ALWAYS make sure that hands, work area, and instruments are clean and dry before
making any connections or operating the power supply.
4. ONLY connect the power supply to a properly grounded AC outlet.
Avoiding Damage to the Instrument
1. For proper ventilation, leave at least 10 cm of space behind the instrument, and at least 5
cm of space on each side.
2. Do not operate the power supply in high humidity environments (> 95%), or where

4
condensation may occur.
3. To avoid condensation after operating the power supply in a cold room, wrap the unit in a
plastic bag and allow at least 2 hours for the unit to equilibrate to room temperature before
removing the bag and operating the unit.
Symbols
Used on the 250V Power Supply to indicate an area where a potential shock
hazard may exist.
Used on the 300V Power Supply to indicate an area where a potential shock
hazard may exist.
Product Contents
Types of Products
This manual is supplied with the following products:
Product Catalog no.
250V Power Supply (115 / 230 VAC switch-able, 50/60 Hz) VWR 250V
Product Contents
Component Quantity
250V Power Supply 1 each
Instruction Manual 1 each
Extra Fuse 1 each
Power Cord 1 each
Warranty Card 1 each
Upon Receiving the Instrument
Examine the unit carefully for any damage incurred during transit. Any damage claims must be
filed with the carrier, keep the supplied box for inspection. The warranty does not cover
in-transit damage.
To ensure safe, reliable operation, always operate the 250V Power Supply in
accordance with the manufacturer’s instructions. Always wear protective gloves
and safety glasses when working in a laboratory environment. See safety
information on pages v-vii. Warranty information is provided on page 19.

5
Product Specifications
250V Power Supply Specifications
Input Power (Switchable) 115 VAC, 50-60 Hz
230 VAC, 50-60 Hz
Fuses One 4A/250V, one extra fuse is provided
Output power in watts 300 watts
Output voltage range 5~250V
Output current range 10 mA~3 A
Timer PLQKUPLQ
Terminalpairs 4
Operating Modes
Constant Voltage 1V step
Constant Current 1 mA step
Crossover Auto
Displaytype LCD Graphic type
Displaysize 53.64 x 15.64 mm (W x H)
Pause function Yes
Safetyfeature No Load Detection
Load Change Detection
Overload detection
Ground Leak
Auto Restart
Programmable Yes
Store file no.: 10
Program:upto10steps
Stackable Yes
Housing material Flame retardant ABS
Housing size 200 x 290 x 70 mm (W x D x H)
Operating temp. 0-40°C
Environmental condition 100% RH, 75 KPa-106 Kpa, Altitude not to exceed 2000
meters
Weight 2.6 kg
Certifications CE; 5R+6(7/&6$
Warranty 2years

6
Introduction
Overview
The 250V Power Supply is a microprocessor-controlled power supply designed to meet most
electrophoresis needs in a single easy to use unit. The power supplies small foot print and
stacking feature use minimal bench space. The power supply is capable of running constant
voltage/constant current applications and programming mode concurrently. This instrument is
ideal for DNA/RNA electrophoresis, SDS-PAGE, native PAGE, and IEF applications. With
four sets of output jacks that can be used simultaneously, the 250V Power Supply is designed
to run applications at maximal efficiency. The 250V Power Supply offers three modes,
Constant Voltage, Constant Current and Constant Wattage Mode. This manual describes the
setup and operation of 250V Power Supply including important information on safety and
maintenance of the unit.
Features of the 250V Power Supply
Important features of the 250V Power Supply are listed below:
•You can use either use constant voltage or constant current
•Capable of running multiple electrophoresis units
•Large LCD display with clear menu prompts for easy use
•Programming capabilities for limiting voltage (V), current (mA)
•Four sets of output terminals
•You can disable the No Load detection alarm system
•Capability to specify run durations by time or volt-hours
Purpose of the Manual
This manual includes the following information:
•Safety information
•Instructions for setting up the instrument
•Guidelines for operating the 250V Power Supply in the Constant Operation mode
•Recommendations for maximum number of gels that can run concurrently and for running
conditions for a wide variety of gel systems
•Introduction to operational electric parameters (voltage, current, and power)
•Guidelines on choosing limiting parameter settings for electrophoresis and duration in time
or volt-hours
•Guidelines for repair and maintenance
Follow the recommendations and guidelines provided in this manual for your safety, best

7
results, and optimal performance of your 250V Power Supply
Description
Operational keys
Key Functions
STOP key: Used to stop operation from the Running Screen
START/PAUSE key: Used to start operation / temporarily interrupt power to an
operation in progress without terminating electrophoresis and to resume power
after pausing without resetting the timer.
CONSTANT key: Used to set up constant voltage or current values
MODE key: Used to choose either Constant Voltage or Constant Current mode
Down Arrow key: Used to move cursor down between parameters and to
decrease numeric values
Up Arrow key: Used to move cursor up between parameters and to increase
numeric values

8
Flowchart
The flowchart below describes the various screens displayed on the 250V Power Supply and
the keys used to navigate through the screens.
1
Mode
Constant
START
PAUSE
STOP
Power Supply
3AP
1. Switch on Main Power Switch
5. Press to choose Constant
Volt or amperage
Constant
Choose constant
Volt, the Volt's word
size will be bigger
than other words.
Amp. & WAT . will be
"maxi value" and
Time will be "00:00".
Choose constant
Amp, the Amp's word
size will be bigger
than other words.
Volt. & WAT. will be
"maxi value" and
Time will be "00:00".
6. Press to choose Volt; Time;
Amp or Wat. which would like to adjust.
Mode
VoltBlinking, press
to increase
or decrease value
TIME Blinking, press
to increase
or decrease value
AMP Blinking, press
to increase
or decrease value
AMP Blinking, press
to increase
or decrease value
TIME Blinking, press
to increase
or decrease value
Volt Blinking, press
to increase
or decrease value
Mode
Press
Mode
Press
Mode
Press
Mode
Press
Mode
Press to enter Step 2
Mode
Press
Mode
Press
4. Press to start power supply, the
parameters will stop blinking and LED
light on " "
START
PAUSE
Display "Constant Volt' Display "Constant AMP'
5. Press again to pause power supply,
the LED is flashing " "
START
PAUSE
Time can't on 0:00condition and the timer
should set 0:01 at least on each step.
On each step, the timer will count down till
time is up and then go to next step. Till all steps
have run complete, the power supply will stop.
This stepcan press to changecondition. Process is same as step 4.
Mode
4. Press to stop power supply, the LED
will be off.
STOP
The parameters will be blinking 5 sec. After
5 sec., if you don't press any key, the
parameters will stop blinking and enter this
value to the power supply automatically.
Constant Mode
Program Mode
Press to choose constant mode
or program mode then press .
Mode
Constant Mode
Program Mode
Constant Mode
Program Mode Instruction Procedure
is same as Mode 302,
but this mode can do
constant Watt.
2. Press to set or down load File.
Mode
File Blinking, press
to set file #.
FILE# : 01
STEPS : 02
3. Press again to set total steps request.
Mode
STEPS Blinking, press
to set total steps request..
FILE# : 01
STEPS : 02
4. Press again to enter setting condition.
Mode
11
1 1 1 1
1 1
11
11
11
11
11
Wat. Blinking, press
to increase
or decrease value
Mode
Press
1 1
Wat. Blinking, press
to increase
or decrease value
Mode
Press
11
Mode
Press to en ter Step 2
Press more 3 sec., the display will reture to main page
Mode
11
1
11 11
Choose constant
Wat., the W's word
size will be bigger
than other words.
Volt. & Amp. will be
"maxi value" and
Time will be "0".
W Blinking, press
to increase
or decrease value
TIME Blinking, press
to increase
or decrease value
Volt Blinking, press
to increase
or decrease value
Mode
Press
Mode
Press
Mode
Press
Amp. Blinking, press
to increase
or decrease value
Mode
Press
11
11
11
11
11
Mode
Press to en ter Step 2
Display "Constant Watt"
1
1
11
Download fille and start the power supply

9
1
Mode
Constant
START
PAUSE
STOP
Power Supply
3AP
1. Switch on Main Power Switch
5. Press to choose Constant
Volt or amperage
Constant
Choose constant
Volt, the Volt's word
size will be bigger
than other words.
Amp. & WAT . will be
"maxi value" and
Time will be "00:00".
Choose constant
Amp, the Amp's word
size will be bigger
than other words.
Volt. & WAT. will be
"maxi value" and
Time will be "00:00".
6. Press to choose Volt; Time;
Amp or Wat. which would like to adjust.
Mode
VoltBlinking, press
to increase
or decrease value
TIME Blinking, press
to increase
or decrease value
AMP Blinking, press
to increase
or decrease value
AMP Blinking, press
to increase
or decrease value
TIME Blinking, press
to increase
or decrease value
Volt Blinking, press
to increase
or decrease value
Mode
Press
Mode
Press
Mode
Press
Mode
Press
Mode
Press to enter Step 2
Mode
Press
Mode
Press
4. Press to start power supply, the
parameters will stop blinking and LED
light on " "
START
PAUSE
Display "Constant Volt' Display "Constant AMP'
5. Press again to pause power supply,
the LED is flashing " "
START
PAUSE
Time can't on 0:00condition and the timer
should set 0:01 at least on each step.
On each step, the timer will count down till
time is up and then go to next step. Till all steps
have run complete, the power supply will stop.
This stepcan press to changecondition. Process is same as step 4.
Mode
4. Press to stop power supply, the LED
will be off.
STOP
The parameters will be blinking 5 sec. After
5 sec., if you don't press any key, the
parameters will stop blinking and enter this
value to the power supply automatically.
Constant Mode
Program Mode
Press to choose constant mode
or program mode then press .
Mode
Constant Mode
Program Mode
Constant Mode
Program Mode Instruction Procedure
is same as Mode 302,
but this mode can do
constant Watt.
2. Press to set or down load File.
Mode
File Blinking, press
to set file #.
FILE# : 01
STEPS : 02
3. Press again to set total steps request.
Mode
STEPS Blinking, press
to set total steps request..
FILE# : 01
STEPS : 02
4. Press again to enter setting condition.
Mode
11
1 1 1 1
1 1
11
11
11
11
11
Wat. Blinking, press
to increase
or decrease value
Mode
Press
1 1
Wat. Blinking, press
to increase
or decrease value
Mode
Press
11
Mode
Press to en ter Step 2
Press more 3 sec., the display will reture to main page
Mode
11
1
11 11
Choose constant
Wat., the W's word
size will be bigger
than other words.
Volt. & Amp. will be
"maxi value" and
Time will be "0".
W Blinking, press
to increase
or decrease value
TIME Blinking, press
to increase
or decrease value
Volt Blinking, press
to increase
or decrease value
Mode
Press
Mode
Press
Mode
Press
Amp. Blinking, press
to increase
or decrease value
Mode
Press
11
11
11
11
11
Mode
Press to en ter Step 2
Display "Constant Watt"
1
1
11
Download fille and start the power supply

10
Getting Started
Installing the 250V Power Supply
1. Check the label located near the AC inlet to ensure that the unit is compatible with locally
provided voltage.
2. Place the 250V Power Supply on a level laboratory bench. Keep the area around the power
supply clear to ensure proper ventilation of the unit.
3. For your safety: Position the unit properly such that the On-Off switch and the AC inlet
located on the rear of the unit are easily accessible.
4. Ensure the AC power switch is in the Off position.
5. Attach the power cord to the AC inlet. Use only properly grounded AC outlets and power
cords.
6. Connect the leads from the electrophoresis unit; insert the red lead (+) into the red output
jack, and the black lead (-) into the black output jack.
Important Guidelines
Introduction
The important guidelines for operating the 250V Power Supply are provided in this section. We
recommend that you carefully review these guidelines before operating the instrument.
Important
For best results, do NOT use the 250V Power Supply at its maximal electrical load limits.
Variations in buffer conditions can result in exceeding the power supply’s maximum voltage,
current, or power output capacity and produce undesirable variations in electrophoretic
separations.
General Operating Instructions
Follow the instructions below to operate the 250V Power Supply.
•Turn on the 250V Power Supply by toggling the power switch on the rear side of the
instrument. Upon start-up, the Display Screen appears on the screen.
•Use the START/PAUSE and STOP keys and output jacks for applications.
•Use the CONSTANT key to set up probable operation model for applications.
Recommendation
The duration of electrophoresis can be defined in time (hours/minutes). When using this or any
electrophoresis product, we recommend that you adhere to the protocols given in the

11
electrophoresis product manuals, and durations, specified in time.
Important
For best results, follow these important guidelines when running multiple gels and
electrophoresis units concurrently.
For example:
•Avoid running samples of widely differing salt concentrations or sample buffers at the same
time or on the same gel.
•Properly prepare and desalt your samples.
Note: Variations in conductivity due to differences in buffer salt concentrations can affect the run of all
the samples run at the same time.

12
Operational Modes
Introduction
The 250V Power Supply is designed to operate under two modes, Constant Voltage
Operation / Constant Current Operation or Programming Mode, depending upon your
electrophoresis needs.
Use the Constant Voltage / Current Operation for applications that require only one specific
voltage limit, current limit, and power limit continuously during the entire duration of
electrophoresis.
Display Screen
The Display Screen is the screen to appear after turning on the power to your instrument.
You can choose the operational Mode (Constant Operation or Constant Current Mode) on
the downward side of the display screen.
•On the Display Screen:
•The voltage value is displayed on the left-top side of the display screen.
•The Timer is the first line on the right-top, and current value is displayed in the second
line on the right-top side of the display screen.
Constant Operation Protocol
Introduction
Instructions for operating the 250V Power Supply in the Constant Operation are provided in
this section. The Constant Voltage / Current Mode allow you to specify a voltage limit, and
current limit to be used continuously during the entire duration of electrophoresis. Review the
guidelines provided in this manual before starting electrophoresis using the 250V Power
Supply.
A basic Constant Voltage / Current Mode operating procedure of the 250V Power Supply is
provided below. We recommend reading the guidelines provided in this manual for best results
before starting an operation.
1. Use the power switch on the rear side of the instrument to turn on the 250V Power Supply.
The Display Screen will appear on the screen.
2. Press the CONSTANT key to select either Constant Voltage Operation or Constant
Current Operation from the Display Screen.
3. Use the ▼▲ arrow keys to set either voltage (V) or current (mA) parameters to the
appropriate values.
4. Choose and use ▼▲ arrow key to set the time (hours/minutes) to specify the duration of the
electrophoresis.

13
4. Press START/PAUSE key to start electrophoresis.
5. Press the START/PAUSE key again to temporarily interrupt power to ongoing
electrophoresis without terminating the operation along with LED flashing.
6. Press the STOP key to stop electrophoresis.
7. To change Limits of Electrophoresis in Progress
•If you need to make changes to the current running limits, you must stop electrophoresis by
pressing the Mode key. Enter the changes and then press Start/Stop once again to restart
your operation.
Note: After stopping and restarting an operation, the timer resets to selected time and does not take into
account the time that electrophoresis was in progress before it was stopped.
Basic Programming Protocol
Introduction
Instructions for operating the 250V Power Supply in the Programming Operation are
provided in this section. The Programmable Mode allows you to vary levels in voltage (V),
current (mA), and power (W) during specified periods of time as discrete changes
(STEP) or as gradients (RAMP) for up to 10 Steps, depending upon your electrophoresis
needs.
A basic Programmable Mode operating procedure of the 250V Power Supply is provided
below. We recommend reading the guidelines provided in this manual for best results before
starting an operation.
Selecting a program
1. Select file mode by scrolling down using the ▼key
2. When highlighted press Mode key
3. Select file number using the a▼▲ arrowkeys
4. When file number is located press the Mode key
5. Select the number of steps by using the arrow ▼▲arrow keys
6. To enter the parameters of the run press the Mode key
7. Select voltage Amperage or Watts use the Mode key
8. You can increase or decrease the value by using the▼▲ arrow keys
9. To set the time in hours press the Mode key
10. You can increase or decrease the value by using the▼▲ arrow keys
11. Select the Mode key again to select minutes.
12. You can increase or decrease the value by using the▼▲ arrow keys
13. To set the Amperage press the Mode key again
14. You can increase or decrease the value by using the▼▲ arrow keys

14
15. To set the Wattage, press the Mode key to select wattage.
16. You can increase or decrease the value by using the▼▲ arrow keys
17. To advance to the next step press the Mode key until the step is selected
18. Follow the above for each consecutive step.
Viewing a Program
1. Select the file number using the ▼▲ arrow keys when highlighted press the Mode
key.
2. Press the Mode key 3 more time to advance to the programming.
3. If multiple steps use the Mode key to advance through the program to the next step.
Editing a program
1. When in a file is selected the parameters can be edited by the Mode button
2. When the parameter is selected it will flash use the ▼▲ arrow keys to either
increase or decrease values.
3. Press the Mode key to migrate to the next parameter.
4. When the parameter is selected use the ▼▲ arrow keys to increase or decrease
the values.
Programs with multiple steps
1. When the parameters are complete a step in a file the program will proceed to the
next step. Follow the above editing procedure to edit the step within the program.
2. With the ▼▲ arrow keys select the Program Mode .
3. Select program number 1 through 10 then press the Mode key.
4. Select the number of segments 1 through 10 then press the Mode key.
5. Follow the basic programming protocol to set parameters.
Choosing Limiting Parameter Settings
Introduction
The 250V Power Supply is capable of operating at limiting voltage, or limiting
current. We recommend operating the 250V Power Supply at limiting voltage for most
applications. See below for more details.
Voltage Limiting
For most electrophoresis methods resistance increases throughout the run. Limiting the
voltage provides the following advantages:

15
•Current and power decrease throughout the run, providing an improving margin of safety
over time.
•The same voltage setting can be used regardless of the number or thickness of gels being
electrophoresed.
Current Limiting
Discontinuous buffer systems and, to a lesser extent, continuous systems increase resistance
during the run. If you use the current limiting setting on the 250V Power Supply, the voltage will
increase as resistance increases to satisfy Ohm’s law (V=IR). If no voltage limit is set and a
local fault condition occurs, such as a poor connection, very high local resistance may cause
the voltage to increase to the maximum capacity of the power supply. This may lead to local
overheating and damage to the electrophoresis cell or create unsafe conditions. When
operating under constant current conditions, set a voltage limit on the power supply at or
slightly above the maximum expected voltage.

16
Troubleshooting
Review the information in the table below to troubleshoot operating problems.
Problem Cause Solution
AC power cord is not
connected
Check AC power cord connections at both
ends. Use the correct cords.
The LCD screen
remains blank and
the fan does not run
when the power is
turned on
The fuse has blown Replace the fuse
Electrophoresis leads are
not connected to the power
supply or to the
electrophoresis unit(s), or
there is a broken circuit in
the electrophoresis cell
Check the connections to the power supply
and on your electrophoresis cell to make
sure the connection is intact; check condition
of wires in electrophoresis unit. Close the
circuit by reconnecting the cables. Press
START/PAUSE to restart the run.
High resistance due to tape
left on a pre-cast gel,
incorrect buffer
concentration, or incorrect
buffer volumes in the
electrophoresis cell
Correct the condition by making sure the
tape is removed from the pre-cast gel,
buffers are prepared
correctly, and the recommended volume of
buffer is added to the electrophoresis unit.
Operation stops
with alarm:
The screen displays
“NO LOAD”
High voltage application is
set to run on a very low
current
DISABLE No Load alarm on the
Display Screen
Operation stops
with alarm:
Display shows
“OVER VOLTAGE”
Circuit is interrupted
•Verify that the running buffer is correct.
•Verify the all cables are attached correctly
•Turn the Power switch off and on again;
restart application.
•If you cannot restart the
instrument, turn off the power, disconnect
the power cord from the outlet, and contact
Technical Service.
Operation stops
with alarm:
Display shows
“LEAKAGE”
Ground leak detected
during run
Check the electrophoresis system for
improper grounding. Restart the power
supply by turning the Power
switch off and on.

17
Operation stops
with alarm:
Display shows
“OVER TEMP”
Power supply is
overheating
•Turn off power supply. Check for sufficient
airflow around the power supply fan. After
cooling down, restart the power supply by
turning the Power switch to the on position.
•If you cannot restart the
instrument, turn off the power, disconnect
the power cord from the outlet, and contact
Technical Service.
Operational Electrical Parameters
Power Considerations
Electrophoresis is the migration of a charged particle under the influence of an electrical field.
The power supply output parameters voltage, current, and power
are related by the following two equations:
Voltage (V) = Current (I) x Resistance (R); (V=IR)
Power (W) = Current (I) x Voltage (V); (W=IV)
Resistance
Resistance of the assembled electrophoresis cell is dependent on the conductivity of the gel
buffer, the thickness of the gel, and the number of gels being run. Although the resistance is
determined by the gel system, the resistance can vary over the course of an electrophoretic
separation. For instance, in the Tris-Glycine buffer system, the fast moving, highly conductive
chloride ions in the gel are gradually replaced by the slower moving, less conductive glycine
ions from the running buffer as the gel runs. As a result, the resistance of the gel increases as
the chloride/glycine front moves down the gel, and the current decreases.
Voltage
The velocity with which an ion moves in an electric field will vary in proportion to the field
strength (volts per unit distance). The higher the voltage the faster an ion will move.
Current
Current is a function of the number of ions passing a given cross-section of the circuit at a
given time. For a given gel/buffer system, at a given temperature, current will vary in proportion
to the field strength (voltage) and/or crosssectional area (number and/or thickness of the gels).

18
Ions in solution and at a given voltage will move faster as the temperature increases,
increasing current.
Power
The power in Watts, or the rate of heat generated by the system, is directly proportional to
voltage and current (W=IV).
Repair and Maintenance of 250V Power Supply
Introduction
The 250V Power Supply requires no periodic maintenance program with the exception of an
occasional dry wipe-down of the instrument.
Encountering Problems
1. Check the troubleshooting section.
2. Call Technical Service.
3. If the unit must be shipped back for repair, contact Labnet International or the distributor for
a Return Authorization Number and shipping instructions. The unit will be repaired as
quickly as possible and returned to you.
Replacing the Fuse
For additional fuses, contact VWR International Technical Service.
To replace the fuse:
1. Turn off the main power switch at the rear of the 250V Power Supply and detach the power
cord from the rear of the 250V Power Supply.
2. Open the fuse compartment located inside the Power Entry Module by inserting a small flat
blade screwdriver into the slot below the ON/OFF switch. Turn the screwdriver to gently
pry open the fuse compartment.
Note: The fuse compartment will not open with the power cord in place.
3. Pull the fuse holder out of the compartment and inspect the fuse. If the fuse is burned or
there is a break in the fuse element, replace the fuse with an identical type of fuse (4A/250V)
as provided in the fuse holder (see figure below).
4. Place the fuse holder back into the compartment.
5. Snap the cover closed.

19
Technical Service
Web Resources
Visit the VWR’s website at www.vwr.com for:
•Complete technical service contact information.
•Access to VWR’s Online Catalog, and information about accessories and related products.
•Additional product information and special offers.
Contact Us For information or technical assistance contact your local VWR representative or
visit. www.vwr.com.
Legal Address of Manufacturer
United States Europe
VWR International VWR International Europe BVBA
1310 Goshen Parkway Haasrode Researchpark Zone 3
West Chester, PA 19380 Geldenaaksebaan 464
800-932-5000 B-3001 Leuven
http://www.vwr.com + 32 16 385011
http://www.be.vwr.com
Warranty
VWR International, Inc. warrants that this product will be free from defects in material and
workmanship for a period of two (2) years from date of purchase. If a defect is present, VWR
will, at its option, repair, replace, or refund the purchase price of this product at no charge to
you, provided it is returned during the warranty period. This warranty does not apply if the
product has been damaged by accident, abuse, misuse, or misapplication, or from ordinary
wear and tear.
For your protection, items being returned must be insured against possible damage or loss.
This warranty shall be limited to the replacement of defective products. IT IS EXPRESSLY
AGREED THAT THIS WARRANTY WILL BE IN LIEU OF ALL WARRANTIES OF FITNESS
AND IN LIEU OF THE WARRANTY OF MERCHANTABILITY.
For research use only. Not intended for any animal or human therapeutic or diagnostic use.

20
Equipmentdisposal
This equipment is marked with the crossed out wheeled bin symbol to indicate that this
equipment must not be disposed of with unsorted waste.
Instead it's your responsibility to correctly dispose of your equipment at lifecycle -end by
handling it over to an authorized facility for separate collection and recycling. It's also your
responsibility to decontaminate the equipment in case of biological, chemical and/or
radiological contamination, so as to protect from health hazards the persons involved in the
disposal and recycling of the equipment.
For more information about where you can drop off your waste of equipment, please contact
your local dealer from whom you originally purchased this equipment.
By doing so, you will help to conserve natural and environmental resources and you will
ensure that your equipment is recycled in a manner that protects human health.
Thank you.