Thermo Scientific Fisherbrand GT4 User manual

Instruction manual
Fisherbrand GT4 Centrifuge
Fisherbrand GT4R Centrifuge
50156444-b • 11 / 2020
15858722
15848722
15838722
15828722

IMPORTANT Read this instruction manual. Failure to follow the instructions in this manual can result in
damage to the unit, injury to operating personnel, and poor equipment performance.
CAUTION All internal adjustments and maintenance must be performed by qualified service personnel.
Material in this manual is for informational purposes only. The contents and the product it describes are
subject to change without notice. Thermo Fisher Scientific makes no representations or warranties with
respect to this manual. In no event shall be held liable for any damages, direct or incidental, arising from or
related to the use of this manual.
BIOShield™, Fiberlite™, HIGHConic™, Microliter™, MicroClick™ and Auto-Lock™.
All trademarks are the property of Thermo Fisher Scientific Inc. and its subsidiaries unless otherwise specified.
© 2020 Thermo Fisher Scientific Inc. All rights reserved.

Contents
Preface ........................................................................ 1
Scope of Supply....................................................... 1
Intended Use............................................................ 1
Accident Prevention ................................................. 1
Precautions.............................................................. 1
Introduction and Description ........................................ 3
Characteristics ......................................................... 3
Technical Data ......................................................... 3
Directives, Standards and Guidelines ....................... 4
Functions and Features............................................ 4
Mains Supply ........................................................... 5
Refrigerant ............................................................... 5
Rotor Selection ........................................................ 5
Before Use................................................................... 6
Before Setting Up..................................................... 6
Transporting the Centrifuge...................................... 6
Location................................................................... 6
Aligning the Centrifuge ............................................. 6
Mains Connection .................................................... 7
Storage .................................................................... 7
Control Panel............................................................... 8
Control Panel ........................................................... 8
Keys......................................................................... 8
Operation..................................................................... 9
Switch on Centrifuge................................................ 9
Lid Opening ............................................................. 9

Close Lid.................................................................. 9
Rotor Installation ...................................................... 9
Entering Parameters................................................. 10
Saving Programs...................................................... 11
Centrifugation........................................................... 11
Temperature Adaptation During Standstill ................ 12
Short-term Centrifugation......................................... 12
Removing the Rotor ................................................. 12
Aerosol-Tight Rotors ................................................ 13
Aligning the Centrifuge ............................................. 13
System Menu............................................................... 14
Description............................................................... 15
Maintenance and Care................................................. 16
Cleaning Intervals ..................................................... 16
Cleaning................................................................... 16
Disinfection .............................................................. 17
Decontamination ...................................................... 17
Autoclaving .............................................................. 18
Maintenance and Repair Services ............................ 18
Troubleshooting........................................................... 19
Mechanical Emergency Door Release ...................... 19
Troubleshooting by User .......................................... 20
When to Contact a Service Technician ..................... 23
Chemical Compatibility Chart ...................................... 24

Centrifuge GT 4 / 4R Preface | 1
Preface
Before starting to use the centrifuge, read through this
instruction manual carefully and follow the instructions.
The information contained in this instruction manual is the
property of Thermo Fisher Scientific; it is forbidden to copy or
pass on this information without explicit approval.
Failure to follow the instructions and safety information in this
instruction manual may void the seller’s warranty.
Scope of Supply
If any parts are missing, contact your nearest Fisher Scientific
sales representative.
Intended Use
This centrifuge is designed to separate sample mixtures of
different densities like chemicals, environmental samples and
other non-human body samples.
Accident Prevention
Prerequisite for the safe operation of the Fisherbrand
GT 4 / 4R Centrifuge is a work environment in compliance
with standards, directives and trade association safety
regulations and proper instruction of the user.
The safety regulations contain the following basic
recommendations:
• Maintain a radius of at least 30 cm around the centrifuge.
• Implementation of special measures which ensure that no
one can approach the centrifuge for longer than
absolutely necessary while it is running.
• The mains plug must be freely accessible at all times.
Pull out the power supply plug or disconnect the power
supply in an emergency.
Precautions
In order to ensure safe operation of the Fisherbrand GT 4 / 4R
Centrifuge, the following general safety regulations must be
followed:
• Do not manipulate the safety devices.
• The centrifuge should be operated by trained specialists
only.
• The centrifuge is to be used for its intended use only.
• Plug the centrifuge only into sockets which have been
properly grounded.
• Do not move the centrifuge while it is running.
• Do not lean on the centrifuge.
• Use only rotors and accessories approved for this
centrifuge. Exceptions to this rule are commercially
available glass or plastic centrifuge tubes, provided they
have been approved for the speed or the RCF value of
the rotor.
• Do not use rotors that show any signs of corrosion and/
or cracks.
• Do not touch the mechanical components of the rotor
and do not make any changes to the mechanical
components.
• Use only with rotors which have been properly installed.
Follow the instructions on the Auto-Lock™ in section
Rotor Installation.
• Use only with rotors which have been loaded properly.
Follow the instructions given in the rotor manual.
• Never overload the rotor. Follow the instructions given in
the rotor manual.
• Never start the centrifuge when the lid is open.
• Never open the lid until the rotor has come to a complete
stop and this has been confirmed in the display.
• The lid emergency release may be used in emergencies
only to recover the samples from the centrifuge, e.g.
during a power failure (refer to the section Mechanical
Emergency Door Release).
Item Description Quantity Check
Centrifuge GT 4 / 4R 1
Power supply cable 1
Instruction manual 1
CD 1
Anti-corrosion oil 1

2 | Preface Centrifuge GT 4 / 4R
• Never use the centrifuge if parts of its cover panels are
damaged or missing.
• Do not touch the electronic components of the centrifuge
or alter any electronic or mechanical components.
• Observe the safety instructions.
Pay attention to the following:
•Location: Well-ventilated environment, set-up on a level
and rigid surface with adequate load-bearing capacity.
•Rotor installation: Make sure the rotor is locked
properly into place before operating the centrifuge.
• When working with corrosive samples (salt solutions,
acids, bases), the accessory parts and vessel have to be
cleaned carefully.
• Always balance the samples.
Centrifuging hazardous substances:
• Do not centrifuge explosive or flammable materials or
substances which could react violently with one another.
• The centrifuge is neither inert nor protected against
explosion. Never use the centrifuge in an explosion-prone
environment.
• Do not centrifuge toxic or radioactive materials or any
pathogenic micro-organisms without suitable safety
precautions.
When centrifuging microbiological samples from the Risk
Group II (according to the Bio-safety Manual of the World
Health Organization WHO), aerosol-tight biological seals
have to be used.
For materials in a higher risk group, extra safety measures
have to be taken.
• If toxins or pathogenic substances enter into the
centrifuge or its parts, appropriate disinfection measures
have to be taken (refer to the section Disinfection).
• Highly corrosive substances which can cause material
damage and impair the mechanical stability of the rotor
should only be centrifuged in corresponding protective
tubes.
IF A HAZARDOUS SITUATION OCCURS, TURN OFF
THE POWER SUPPLY TO THE CENTRIFUGE AND
LEAVE THE AREA IMMEDIATELY.
This symbol refers to general hazards.
CAUTION: Means that material damage could
occur.
WARNING: Means that injuries or material
damage or contamination could occur.
This symbol refers to biological hazards.
Observe the information contained in the
instruction manual to keep yourself and your
environment safe.

Centrifuge GT 4 / 4R Introduction and Description | 3
Introduction and Description
Characteristics
Several rotors with a wide range of tubes can be used.
The set speed is reached within seconds. The
maintenance-free induction motor ensures quiet and low-
vibration operation even at high speeds, and guarantees a
very long lifetime.
The user-friendly control panel makes it easy to preset the
speed, RCF value, running time, temperature, and running
profile (acceleration and braking curves). You can choose
between the display of speed and RCF or the entry mode.
These settings can be changed even while the centrifuge is
running.
With the help of the PULSE key , you can also centrifuge a
sample for just a few seconds, if required.
The Fisherbrand GT 4 / 4R Centrifuge is equipped with
various safety features:
• The housing and rotor chamber consists of steel plate,
the interior is made of armour steel, while the front panel
is made of high-impact resistant plastic.
• The lid is equipped with a view port and a lock.
• The lid of the centrifuge can only be opened while the
centrifuge is switched ON and the rotor has come to a
complete stop. The centrifuge cannot be started until the
lid is closed properly.
• The integrated rotor detection systems ensure that no
inadmissible speed settings can be preselected.
• Electronic imbalance recognition
• Lid emergency release: For emergencies only, e.g. during
power failures (refer to the section Mechanical
Emergency Door Release)
Technical Data
The technical data of the Fisherbrand GT 4 / 4R Centrifuge is listed in the following table.
PULSE
Feature GT 4 GT 4R
Environmental conditions
Use in interior spaces
Altitudes of up to 2
000 m above sea level
max. relative humidity 80 % up to 31 °C; decreasing linearly up to
50 % relative humidity at 40 °C.
Permissible ambient temperature +2 °C to +35 °C +2 °C to +35 °C
Overvoltage category II II
Pollution degree 2 2
Heat dissipation
Ventilated Refrigerated
230 V 230 V
5 800 BTU/h 6 653 BTU/h
IP 20 20
Running time Unlimited Unlimited
Max Speed nmax 15
200 rpm (depending on the
rotor)
15 200 rpm (depending on the
rotor)
Min Speed nmin 300 rpm 300 rpm
Maximum RCF value at nmax 25
314 x g 25 314 x g
Maximum kinetic energy < 62.5 kJ < 62.5 kJ

4 | Introduction and Description Centrifuge GT 4 / 4R
Directives, Standards and Guidelines
Functions and Features
The following table gives an overview of the important functional and performance characteristics of the Fisherbrand GT 4 / 4R
Centrifuge.
Noise level at maximum speed < 64 dB (A) < 64 dB (A)
Temperature setting range -10 °C to +40 °C
Dimensions Ventilated Refrigerated
Height
Width
Depth
Table top height
360 mm
550 mm
670 mm
310 mm
360 mm
745 mm
670 mm
310 mm
Weight without rotor 86 kg 116 kg
Feature GT 4 GT 4R
Tension /
Frequency
Directives Produced and inspected
according to the following
standards and guidelines
220-230 V
50 / 60 Hz
2006/42/EC Machinery
2014/35/EU Low Voltage
(Protective Goals)
2014/30/EC Electromagnetic Compatibility (EMC)
2011/65/EC RoHS
Directive on the Restriction of the use of certain Hazardous
Substances in electrical and electronic equipment
EN 61010-1, 2nd Edition
IEC 61010-2-020, 2nd Edition
EN 61326-1
EN ISO 14971
EN ISO 9001
Component / Function Description / Features
Structure / Housing Galvanized steel chassis with armoured plating
Chamber Stainless steel / varnished steel
Drive Induction drive without carbon brushes
Keys and display Easy-to-clean keypad and display surface
Controls Microprocessor-controlled
Internal memory The most recent data is saved
Functions RCF-selection, temperature control, pretemp with cooling equipped devices
Acceleration / braking profiles 9 acceleration and 10 braking curves
Rotor recognition Automatic
Imbalance recognition Electronic, contingent on rotor and speed
Lid lock Automatic lid closing and locking starting from an initial hold position

Centrifuge GT 4 / 4R Introduction and Description | 5
Mains Supply
The following table contains an overview of the electrical connection data for the Fisherbrand GT 4 / 4R Centrifuge. Consider
the following date when selecting the mains connection socket.
Refrigerant
Refrigerant contains fluorinated greenhouse gases in a hermetically sealed system.
Rotor Selection
Various rotors are available to choose from the following:
The technical data of the rotors and the corresponding
adapters and reduction sleeves for various commercially
available containers can be found in the corresponding rotor
operating manuals.
For more information visit our website at:
fishersci.com
Typ e Mains
Voltage Frequency Rated current
Power
consumption
Equipment
fuse
Building
fuse
Refrigerated 230 V 50 / 60 Hz 10.5 A 1 950 W 15 AT 16 AT
Ventilated 230 V 50 / 60 Hz 11 A 1 700 W 15 AT 16 AT
Order no. Centrifuge Refrigerant Quantity Pressure GWP CO2e
75004558 Fisherbrand GT4R R-134a 0.43 kg 21 bar 1 430 0.61 t
75004555 Fisherbrand GT4R R-134a 0.43 kg 21 bar 1 430 0.61 t
TX-1000 75003017
TX-750 75003180
BIOShield™1000 A 75003182
M-20 75003624
Fiberlite™F15-6 x 100y 75003698
HIGHConic™II 75003620
Fiberlite™F21-48 x 2 75003664
Microliter™48 x 2 75003602
MicroClick™30 x 2 75005719
Microliter™30 x 2 75003652

6 | Before Use Centrifuge GT 4 / 4R
Before Use
Before Setting Up
1. Check the centrifuge and the packaging for any shipping
damage.
Inform Fisher Scientific customer service immediately if
any damage is discovered.
2. Remove the packaging.
3. Check the order for completeness (refer to the section
Scope of Supply). If the order is incomplete, contact
Fisher Scientific.
Transporting the
Centrifuge
• Due to the weight (refer to the section Technical Data),
the centrifuge should be carried by several people.
• Always lift the centrifuge at both sides.
Figure 1. Lifting the centrifuge at both sides.
• The centrifuge can be damaged by impacts.
• Transport the centrifuge upright and if at all possible in its
packaging.
Location
The centrifuge should only be operated indoors.
The set-up location must fulfill the following requirements:
• A safety zone of at least 30 cm must be maintained
around the centrifuge. People and hazardous substances
must be kept out of the safety zone while centrifuging.
• The supporting structure must be stable and free of
resonance, for example, a level laboratory bench.
• The supporting structure must be suitable for horizontal
setup of the centrifuge.
• The centrifuge should not be exposed to heat and strong
sunlight.
• The set-up location must be well-ventilated at all times.
Aligning the Centrifuge
The horizontal alignment of the centrifuge must be checked
every time after moving it to a different location.
The supporting structure must be suitable for horizontal setup
of the centrifuge.
WARNING: Always lift the centrifuge on both
sides. Never lift the centrifuge by its front or the
back panel.
Always remove the rotor before moving the
centrifuge.
WARNING: UV rays reduce the stability of
plastics.
Do not subject the centrifuge, rotors and plastic
accessories to direct sunlight.
CAUTION: If the centrifuge is not leveled with
ground, imbalances can occur and the centrifuge
can be damaged.
Do not place anything under the feet to level the
centrifuge.

Centrifuge GT 4 / 4R Before Use | 7
Mains Connection
Figure 2. Mains Connection
1. Turn off the power supply switch on the back (press "0").
2. Plug the centrifuge into grounded electrical sockets only.
3. Check whether the cable complies with the safety
standards of your country.
4. Make sure that the voltage and frequency correspond to
the figures on the rating plate.
5. Establish the connection to the power supply with the
connecting cable.
Storage
• Before storing the centrifuge and the accessories, it must
be cleaned and if necessary disinfected and
decontaminated.
• Store the centrifuge in a clean, dust-free location.
• Ensure to place the centrifuge on its feet.
• Avoid direct sunlight.
Main power
switch
Mains plug

8 | ControlPanel Centrifuge GT 4 / 4R
Control Panel
Control Panel
The control panel contains the keys and displays of the centrifuge (only the power switch is located on the back of the device).
All parameters can be selected and changed during operation.
Keys
The keys allow user intervention for controlling the operating mode as follows:
PULSE
START STOP
OPEN
SPEED
3
12
4
56
TIME TEMP ACC DEC BUCKET
X G
RPM
Program selection keys
Changing the display mode Prewarming or precooling
STOP key
START key
Bucket key
Running time
Speed / RCF value PULSE key
Temperature
Acceleration curve
Braking curve Bucket selection OPEN key
Speed / RCF value
Key Display contents
Start Normal start of the centrifuge
Stop End run manually
Open Lid Automatic release (possible only when device is switched ON). Emergency release
(refer to the section Mechanical Emergency Door Release)
Pulse
By pressing the PULSE key the centrifuge starts immediately and accelerates up to the
end speed. Releasing the key initiates a stopping process at the highest braking
curves
Change value Use the arrow keys in order to modify the displayed value
Snow symbol Press the snow symbol key for prewarming or precooling the centrifuge
Changing the
display mode Use the Change key to change the display mode (Speed / RCF value)
START
STOP
OPEN
PULSE

Centrifuge GT 4 / 4R Operation | 9
Operation
Switch on Centrifuge
1. Turn on the power switch on the back of the device.
The device performs a self-check of its software.
a. When the centrifuge lid is closed the following display
shows:
The speed and time displays read 0. The temperature
indicator displays the current temperature inside the
rotor chamber. The preset acceleration and braking
curves and the selected bucket are also displayed.
b. When the centrifuge lid is open the following display
shows:
The speed and time displays show the preset values.
The temperature indicator displays the current
temperature inside the rotor chamber. The preset
acceleration, braking curves and the selected bucket
are also displayed.
Lid Opening
1. Press the OPEN key.
Close Lid
Close the lid by pressing down on it lightly in the middle or on
both sides of it. Two locks close the lid completely.
Note: The lid should audibly click into place.
Rotor Installation
The approved rotors for the Fisherbrand GT 4 / 4R Centrifuge
are listed in section Rotor Selection. Use only the rotors and
accessories from this list in the centrifuge.
The centrifuge is equipped with an Auto-Lock locking system.
This system is used to automatically lock the rotor to the
centrifuge spindle. The rotor does not have to be bolted on to
the centrifuge spindle.
Proceed as follows:
1. Open the lid of the centrifuge and if necessary remove
any dust, foreign objects or residue from the chamber.
Auto-Lock and O-ring must be clean and undamaged.
Figure 3. Auto-Lock
2. Place the rotor over the centrifuge spindle and let it slide
slowly down the centrifuge spindle. The rotor clicks
automatically into place.
WARNING: Do not reach into the crack between
the lid and the housing. The lid is drawn shut
automatically.
Use the emergency release only for malfunctions
and power failures (refer to the section
Mechanical Emergency Door Release).
WARNING: Do not reach into the crack between
the lid and the housing. The lid is drawn shut
automatically.
OPEN
CAUTION: Unapproved or incorrectly combined
accessories can cause serious damage to the
centrifuge.
O-Ring
Auto-Lock

10 | Operation Centrifuge GT 4 / 4R
3. Check if the rotor is properly installed by lifting it slightly
on the handle. If the rotor can be pulled up, then it must
be reclamped to the centrifuge spindle.
4. If available close the rotor with the rotor lid.
5. The display is shown.
Entering Parameters
The Fisherbrand GT 4 / 4R Centrifuge offers you a total of 9
acceleration and 10 braking curves with which samples and
gradients can be centrifuged.
After the centrifuge is turned on, the last running profile
selected is shown.
Acceleration Curve
1. Press the key below the ACC display in order to
open the acceleration profile selection menu.
The display shows the message “Set acceleration”
2. Select the profile by pressing the key , until the
desired acceleration curve is shown.
Braking Curve
1. Press the key below the DEC display in order to
open the braking curve selection menu.
The display shows the message “Set deceleration”.
2. Select the profile by pressing the key, until the
desired braking curve is shown.
Preselecting Speed / RCF
1. Press the key below the SPEED display in order to
open the speed / RCF value menu.
The display shows the RPM or the RCF value depending
on the display setting. Press the CHANGE key to
toggle between the two modes.
2. Enter the desired value by pressing the key
repeatedly, until the desired value shows.
Note: If an extremely low RCF value has been selected, it will
be corrected automatically if the resulting speed is less than
300 rpm.
Explanation of RCF Value
The relative centrifugal force is given as a multiple of the force
of gravity g. It is a unitless numerical value which is used to
compare the separation or sedimentation capacity of various
devices, since it is independent of the type of device. Only the
centrifuging radius and the speed come into play in it:
r = centrifuging radius in cm
n = Rotational speed in rpm
The maximum RCF value is related to the maximum radius of
the tube opening.
Remember that this value is reduced depending on the tubes
and adapters used.
This can be accounted for in the calculation above if required.
CAUTION: Do not force the rotor onto the
centrifuge spindle.
If the rotor is very light, then it may be necessary
to press it onto the centrifuge spindle with
pressure.
WARNING: If the rotor cannot be properly
locked in place after several attempts, then the
Auto-Lock is defective and you are not permitted
to operate the rotor.
Check for any damage to the rotor: Damaged
rotors must not be used.
Keep the centrifuge spindle area of the rotor clear
of objects.
CAUTION: Check that the rotor is properly
locked on the centrifuge spindle before each use
by pulling it at its handle.
Be sure to check all sealing before starting any
aeorsol-tight applications.
See information in the rotor instruction manual.
RCF 11.18 n
1000
-------------


2r=

Centrifuge GT 4 / 4R Operation | 11
Running Time Preselection
1. Press the key below the TIME display in order to
open the runtime selection menu.
The display shows the message “Set time”.
Enter the desired runtime in H.mm.
2. Enter the desired value by pressing the key
repeatedly, until the desired value shows.
Continuous Operation
1. Press the START key .
During continuous operation, the centrifuge will continue
running until you stop manually.
Preselecting the Temperature
You can preselect temperatures between -10 °C and +40 °C.
To set the temperature, proceed as follows:
1. Press the key below the TEMPERATURE display in
order to open the temperature selection menu.
The display shows “Set temp”:
2. Enter the desired value by pressing the key
repeatedly, until the desired value shows.
Prewarming or Precooling the
Centrifuge
For setting the pretemp value for the centrifuge proceed as
follows:
1. Press the key in order to open the temperature
selection menu.
The display shows the message “Set PreTemp”.
2. Enter the desired value by pressing the key
repeatedly, until the desired value shows.
3. The display shows:
The display shows the current temperature inside the
rotor chamber.
4. Press the START key .
The rotor chamber is cooled down or heated up to the
preset temperature.
5. Press the STOP key .
The display shows the current temperature inside the
rotor chamber.
Saving Programs
1. Enter the program parameters.
2. Press any of the program store keys for 4 seconds.
Centrifugation
Once the rotor has been properly installed, the main switch is
turned on and the lid is closed, you can start centrifuging.
Starting Centrifuge Program
Press the START key on the control panel. The centrifuge
accelerates to the pre-set speed with the time display active.
If the speed setting is higher than the maximum permissible
speed or RCF-value for the particular rotor, the display will
show the message max. XXXX rpm once the centrifuge has
been started.
Within 15 seconds, you can apply this value by pressing the
START key again, and the centrifuging program will
continue. Otherwise the centrifuge will stop and you must
enter a valid number.
You cannot open the lid as long as the centrifuge is running.
START
START
STOP
START
START

12 | Operation Centrifuge GT 4 / 4R
Imbalance Indicator
If a load is imbalanced, this will be indicated at speed higher
than approximately 300 rpm by the message “Imbalanced
load”.
The run will terminate.
Check the loading and start the centrifuge once again.
See information on proper loading in the rotor instruction
manual. For information on troubleshooting, refer to the
section Troubleshooting by User.
Stopping the Centrifugation
Program
With Preset Running Time
Usually the running time is preset and you only have to wait
until the centrifuge stops automatically when the preset time
limit expires.
As soon as the speed drops to zero, the message END will
appear in the display. By pressing the OPEN key , you can
open the lid and remove the centrifuge material.
You can also stop the centrifuging program manually at any
time by pressing the STOP key .
Continuous Operation
If you select continuous operation (refer to the section
Continuous Operation), you must stop the centrifuge
manually. Press the STOP key on the control panel. The
centrifuge will be decelerated at the designated rate. The
message END will illuminate, and after pressing the
OPEN key , the lid will open and you can remove the
centrifuged material.
Temperature Adaptation
During Standstill
The temperature cannot be adapted until the rotor is
positively identified; the speed display will then show END.
When the rotor is not recognized (lid closed and START key
not yet pressed, speed display "0"), the centrifuge
responds by ensuring that the sample cannot freeze
regardless of the rotor being used.
Short-term Centrifugation
For short-term centrifuging, the Fisherbrand GT 4 / 4R
Centrifuge has a PULSE- function.
By holding down the PULSE key , spinning will start and
continue until the key is let go.
The centrifuge accelerates and brakes at maximum power.
Any rpm or RCF entered beforehand is overridden.
Note: The centrifuge accelerates to maximum speed,
regardless of which rotor is installed.
Check carefully whether you must maintain a certain speed
for your application.
During the acceleration process, time is counted forward in
seconds. The reading is displayed until the centrifuge lid is
opened.
Removing the Rotor
To remove the rotor, proceed as follows:
1. Open the centrifuge lid.
2. Grab the rotor handle with both hands and press against
the green Auto-Lock key. At the same time, pull the rotor
directly upwards with both hands and remove it from the
centrifuge spindle. Make sure not to tilt the rotor while
doing this.
Figure 4. Removing the rotor
OPEN
STOP
STOP
OPEN
START
PULSE

Centrifuge GT 4 / 4R Operation | 13
Aerosol-Tight Rotors
When using an aerosol tight lid the rotor can only be removed
with the lid closed. This is to protect you and the samples.
Figure 5. Auto-Lock lid for aerosol-tight rotors
Aligning the Centrifuge
To turn off the centrifuge put the mains switch to "0".
CAUTION: Rotors supplied with a lid for
aerosol-tight applications come with a mandrel,
which belongs to the Auto-Lock. Be sure not to
place the lid onto this mandrel to prevent it from
being damaged.
WARNING: Mind the Auto-Lock mandrel inside
the lid. Do not touch the mandrel.

14 | System Menu Centrifuge GT 4 / 4R
System Menu

Stop

Start










 



Stop

Start










 


Language
Enter system menu?
End of run beep? no
Keypad beep? no
LCD powersave? no
Auto lid open? no
Software ID: 0547V01
Cycle count: 2368
Press the STOP key
to exit the system menu.
.
English English
Deutsch
Francaise
Español
Italiano
Nederlands
Росский
*Software and NVRAM identification
example values.
0547V01
4641V05*
yes
no

Centrifuge GT 4 / 4R System Menu | 15
Description
Enter System Menu
To enter the system menu hold down any of the keys when
switching the centrifuge ON.
Change the selection by pressing the keys .
Use the keys below the speed display in order to
navigate through the system menu.
Use the keys below the bucket selection in order to
navigate within the system menu points.
Press the STOP key to quit the system menu.
Language
Use the keys below the bucket selection in order to
change the language in the display until the desired language
appears in the display.
Use the keys below the speed display in order to
navigate through the system menu.
Press the STOP key to quit the system menu.
End of Run Beep
Use the keys below the bucket selection until it says
YES in the display if the centrifuge should make beep after the
run. Otherwise use the keys below the bucket selection
until it says NO.
Use the keys below the speed display in order to
navigate through the system menu.
Press the STOP key to quit the system menu.
Keypad Beep
Use the keys below the bucket selection until it says
YES in the display if the centrifuge should make beep when
pressing any key. Otherwise use the keys below the
bucket selection until it says NO.
Use the keys below the speed display in order to
navigate through the system menu.
Press the STOP key to quit the system menu.
LCD Powersave
Use the keys below the bucket selection until it says
YES in the display if the centrifuge should enter a powersave
mode after the run. Otherwise use the keys below the
bucket selection until it says NO.
Use the keys below the speed display in order to
navigate through the system menu.
Press the STOP key to quit the system menu.
Auto Lid Open
Use the keys below the bucket selection until it says
YES in the display if the centrifuge should open after the run.
Otherwise use the keys below the bucket selection until
it says NO.
Use the keys below the speed display in order to
navigate through the system menu.
Press the STOP key to quit the system menu.
Software ID
Here you find the current software version.
Use the keys below the speed display in order to
navigate through the system menu.
Press the STOP key to quit the system menu.
Cycle Count
Here you find the current numbers of cycles.
Use the keys below the speed display in order to
navigate through the system menu.
Press the STOP key to quit the system menu.
STOP
STOP
STOP
STOP
STOP
STOP
STOP
STOP

16 | Maintenance and Care Centrifuge GT 4 / 4R
Maintenance and Care
After cleaning the centrifuge and accessories, treat the entire
surface of aluminum parts with corrosion protection oil
(70009824). Also treat the cavities with oil.
Cleaning Intervals
For the sake of personal, environmental, and material
protection, it is your duty to clean and if necessary disinfect
the centrifuge on a regular basis.
Cleaning
When cleaning centrifuge:
• Use warm water with a neutral solvent.
• Never use caustic cleaning agents such as soap suds,
phosphoric acid, bleaching solutions or scrubbing
powder.
• Rinse the cavities thoroughly.
• Use a soft brush without metal bristles to remove
stubborn residue.
• Afterwards rinse with distilled water.
• Place the rotors on a plastic grate with their cavities
pointing down.
• If drying boxes are used, the temperature must never
exceed 50 °C, since higher temperatures could damage
the material and shorten the lifetime of the parts.
• Use only disinfectants with a pH of 6 to 8.
• Dry aluminum parts off with a soft cloth.
• Store the aluminum parts at room temperature or in a
cold-storage room with the cavities pointing down.
Clean centrifuge as follows:
1. Open the centrifuge.
2. Turn OFF the centrifuge.
3. Pull out the power supply plug.
4. Grasp the rotor with both hands and lift it vertically off the
centrifuge spindle.
5. Remove the centrifuge tubes and adapters.
6. Use a neutral cleaning agent with a pH value between
6 and 8 for cleaning.
7. Dry all of the rotors and accessories after cleaning with a
cloth or in a warm air cabinet at a maximum temperature
of 50 °C.
• Tread the bold of the swing out rotor with bold grease
(75003786).
After some applications there might be ice in the rotor
chamber. Let the ice melt and drain it off. Clean the rotor
chamber as described above.
Maintenance Recommended interval
Clean rotor chamber Daily or when polluted
Clean rotor Daily or when polluted
Accessories Daily or when polluted
Cabinet Once per month
Ventilation holes Every six months by a service
technician
CAUTION: Refrain from using any other cleaning
or decontamination procedure than those
recommended here, if you are not entirely sure
that the intended procedure is safe for the
equipment.
Use only approved cleansers.
If in doubt, contact Fisher Scientific.
CAUTION: Before using any cleaning or
decontamination methods except those
recommended by the manufacturer, users should
check with the manufacturer that the proposed
method will not damage the equipment.
CAUTION: When cleaning, do not allow liquids,
especially organic solvents to get on the drive
shaft or the bearings of the centrifuge.
Organic solvents break down the grease in the
motor bearing. The drive shaft could freeze up.