Globe Scientific GCM-24 User manual

®
High Speed MicroCentrifuges
USER MANUAL
GCM-24 & GCM-R-24
www.globescientic.com
IMPORTANT: Before using this centrifuge, please carefully and completely
read this user manual for efcient operation and proper safety.

Contents
Safety Reminder ........................................................................... 1-2
1. Specications.........................................................................2
2. Declaration of Conformity ..............................................3
3. Required Operating Conditions....................................3
3.1 Basic Operating Conditions...........................................3
3.2 Transport and Storage Conditions..............................3
4. Installation..............................................................................4
4.1 Location .................................................................................4
4.2 Connection of the Power Cord and Grounding.......4
5. Unit Overview.......................................................................5
6. Control Panel.................................................................... 6-7
7. Rotor Preparation ...............................................................8
7.1 Inspect the Rotor ...............................................................8
7.2 Symmetrically Load Centrifuge Tubes in Rotor.....8
8. Operation................................................................................9
8.1 Normal Operation ......................................................9-12
8.2 RCF Operation .................................................................12
8.3 Pulse Operation...............................................................12
9. Maintenance ................................................................13-14
9.1 Cleaning..............................................................................13
9.2 Consumables ....................................................................14
9.3 Routine inspection..........................................................14
10. Troubleshooting Tips................................................15-16
10.1 Possible Problems and Solutions..............................15
10.2 How to Open the Lid......................................................15
10.3 Replacement of Fuses ...................................................16
11. Rotor Instructions ....................................................16-19
11.1 Rotor Structure................................................................16
12. Calculating RCF .................................................................17
13. Returning and Disposal..................................................18
14. Ordering Information ..............................................18-19
15. Warranty ............................................................Back Cover
16. Service .................................................................Back Cover
© 2020 Globe Scientific Inc. all rights reserved. Globe Scientific Inc. and the Globe Scientific logo are registerd trademarks of Globe Scientific Inc.
No part of this manual may be reproduced or otherwise transmitted without the prior written consent of Globe Scientific Inc.
Globe Scientic Inc. reserves the right to change information at any time. Note that specications of the centrifuge are subject to change.
Version 1.0 20031
GCM-24 & GCM-R-24 High Speed MicoCentrifuges
USER MANUAL
®

1
Important Safety Information
Common Safety Precautions
Carefully read the following safety precautions for a thorough understanding.
• Follow the instructions and procedures described in this manual to operate this centrifuge safely.
• Carefully read all safety messages in this manual and the safety instructions on the centrifuge.
• Safety messages are labeled as indicated below. They are in combination with signal words of “WARNING” and
“CAUTION” with the safety alert symbol to call your attention to items or operations that could be dangerous to
you or other persons using this centrifuge. The denitions of signal words are as follows:
WARNING: Personal Danger
Warning notes indicate any condition or practice, which if not strictly observed, could result in personal injury or
possible death.
CAUTION: Possible Damage to Instrument
Caution notes indicate any condition or practice, which if not strictly observed or remedied, could result in
damage or destruction of the instrument.
NOTE: Notes indicate an area or subject of special merit, emphasizing either the product’s capability or common
errors in operation or maintenance.
• Do not operate the centrifuge in any manner not described in this User Manual. When in doubt or if you have any
troubles with this centrifuge, please CONTACT GLOBE SCIENTIFIC AND ASK FOR HELP.
• The precautions described in this User Manual are carefully developed in an attempt to cover all the possible risks.
However, it is also important that you are alert for unexpected incidents. Be careful operating this centrifuge.
WARNING
• This centrifuge is not explosion-proof. Never use explosive or ammable samples.
• Do not install the centrifuge in or near places where inammable gases are generated or chemicals are stored.
• Do not place dangerous materials within 30cm (approximately 12 inches) of the centrifuge.
• Be sure to prepare all necessary safety measures before using samples that are toxic, radioactive or
contaminated with pathogenic micro-organisms at your own risk.
• If the centrifuge, rotor and/or accessories have been contaminated by solutions with toxic, radioactive or
pathogenic materials, clean them according to the decontamination procedure as specied at your institution.
• If you require service, please sterilize and decontaminate the centrifuge in advance and then notify the service
center the details of the materials and procedure.
• To avoid electrical shocks, ensure hands are dry before handling the power cord or turning on/off the
power switch.
• For safety purposes, do not come within 30cm (approximately 12 inches) around the centrifuge when in operation.
• While the rotor is rotating, never release the lid lock.
• Unauthorized repairs, disassembly, or modifying the centrifuge except by an authorized Globe Scientic service
center or service technician is strictly prohibited.

2
CAUTION
• This centrifuge must be located on a rm and level table.
• Make sure the centrifuge is horizontal before running.
• Make sure the angle between the door and cover is greater than 70 degrees when opening the door.
• Be careful not put your ngers or hands between the door and cover while the door is open.
• Do not move or relocate the centrifuge when it is running.
• If uid spills in the rotor chamber, please promptly clean and dry with a dry cloth to avoid sample
contamination.
• Ensure removal of any objects and/or fragments of the tubes dropped inside the rotor chamber before
running the centrifuge.
Rotor Cautions:
• Always check for corrosion and damage on the rotor surface before using it. Do not use the rotor if an
abnormality is found.
• Do not set the speed beyond the allowable maximum speed of the rotor kits (rotor and adapters).
• Do not exceed the allowable imbalance.
• Use the rotor and tubes within their actual capacities.
• If any abnormal condition occurs during operation, please stop immediately and contact our service center.
Notify the service center of the warning code (if displayed) along with the model and serial numbers and a
detailed description of the issue.
• Vibrations are likely to damage the centrifuge. Please contact our service center if any abnormality is observed.
1. Specications
Maximum Speed 15000rpm(200-15000rpm), increment: 10rpm
Maximum RCF 21380×g, increment: 10×gMaximum RCF 21380×g, increment: 10×g
Maximum Capacity 1.5mL/2mL x 24, 0.5mL x 36 (optional), 4 x 8 strip PCR tubes (32 locations
total, optional), 5mL x 12 (optional), 0.2mL/0.5mL x 24 (optional adapters)
Temperature Range -20º-40º(GCM-R-24)
Timer 30seconds -99minutes-HOLD, continuous operation
Driving Motor Brushless DC motor
Safety Devices Dual door interlock, Over-speed detector, Over-temperature detector,
Automatic internal diagnosis
Power Requirements GCM-24: Single-phase, 220V-240V, 50Hz/60Hz, 5A.
110V-120V, 50Hz/60Hz, 5A
GCM-R-24: Single-phase, 220V-240V, 50Hz/60Hz, 10A.
110V-120V, 50Hz/60Hz, 10A
Dimensions (mm) GCM-24: (L)280×(W)364×(H)266
GCM-R-24: (L)338×(W)580×(H)324
Weight GCM-24: 12kg
GCM-R-24: 30kg
Additional features Speed/RCF switch, Pulse operation, Processing display, Audible reminder
Important Safety Information (Cont.)

3
2. Declaration of Conformity
Construction in accordance with the following safety standards:
EN 61010-1
EN 61010-2-10
Construction in accordance with the following EMC standards:
EN 61326-1/ FCC Part 15 Subpart B/ IECS 001
Associated EU guidelines:
EMC guidelines: 2004/108/EC
Centrifuge guidelines:
This ISM device complies with Canadian ICES-001.
Cet appareil ISM est conforme à la norme NMB-001 du Canada.
Changes or modications not expressly approved by the party responsible for compliance could void the user’s
authority to operate the equipment.
NOTE: 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 his own expense.
3. Required Operating Conditions
3.1 Basic Operational Conditions
• GCM-24: Single-phase, 220V-240V, 50Hz/60Hz, 5A; 110V-120V, 50Hz/60Hz, 5A
GCM-R-24: Single-phase, 220V-240V, 50Hz/60Hz, 10A; 110V-120V, 50Hz/60Hz, 10A
• Ambient temperature: 2ºC~40ºC
• Relative humidity: ≤80%
• No vibration and airow around the centrifuge
• No static, explosive or corrosive gases around the centrifuge
3.2 Transport and Storage Conditions
• Storage temperature: -40ºC-55ºC
• Relative humidity: ≤93%, non-condensing

4
4. Installation
This section describes the instructions that you should abide by when installing the centrifuge to ensure your safety and
optimum performance. Before moving the centrifuge, the rotor must be removed.
WARNING
• Improper power supply may damage centrifuge
• Make sure the power source conforms to the required power supply before connecting
4.1 Location
1. Place the centrifuge on a rm, at and level table, ensure the four feet of this centrifuge stand on the table rmly.
Avoid installing on a slippery surface or a surface prone to vibration.
2. Ideal ambient temperature is 20ºC ± 5ºC, avoid placing the centrifuge in direct sunlight if the ambient temperature
exceeds 30ºC.
3. Keep obstructions clear of the centrifuge at least 10cm on both sides and at least 30cm behind it to ensure optimal
cooling efciency.
4. Keep away from heat or water to avoid sample temperature issues or centrifuge failures.
4.2 Connection of the Power Cord and Grounding
WARNING
• To avoid electrical shocks, ensure your hands are dry when touching the power cord.
• This centrifuge must be grounded properly.
A minimum 10A outlet providing a sufcient ground is required, and this must meet local safety requirements.

5
5. Unit Overview
FRONT VIEW
FRONT VIEW
REAR VIEW
REAR VIEW
Lid Seal
Ring
Lid Seal
Ring
Control
Panel
Control
Panel
Power Switch
Power Switch
Power
Switch Power
Switch
Lid Lock Hook
Lid Lock Hook
Cover
Air Vents
Outlet
View Port
View Port
Air Vents
Air Vents
Power
Cord
Socket
Power Cord Socket
Lid
Lid
GCM-24
GCM-R-24

6
6. Control Panel
CONTROL PANEL
OPERATION
1
2
4
3
5
Speed Display Time DisplayTemperature
Pulse............................... The speed can be accelerated and held at the set speed when pressing Pulse on.
Door................................ Press the button to open the lid. The button is not available when the centrifuge is running.
Start / Stop.................. Press the button to start the centrifuge. The centrifuge will brake to stop running if pressed during centrifugation.
Select.............................. Press to choose the parameter you wish to modify.
Adjustment Knob.... Rotate clockwise to increase parameter values. Rotate anti-clockwise to decrease parameter values. Press the
knob to switch between Speed and RCF.
1
2
3
4
5
The main display is shown above. The speed is set to 8880rpm, the temperature of the centrifugal chamber is 21ºC
and the running time is 88 minutes. When the speed symbol is rotating, this indicates the centrifuge is running.
The rotation of the speed symbol increases with the spin speed of the centrifuge. Temperature of chamber is
displayed but cannot be controlled. The time symbol displays the ratio of working to time setting. The total time
setting is divided into 10 sections.
GCM-24

7
6. Control Panel (Cont.)
CONTROL PANEL
OPERATION
1
2
4
3
5
Speed Display Time DisplayTemperature
Pulse............................... The speed can be accelerated and held at the set speed when pressing Pulse on.
Door................................ Press the button to open the lid. The button is not available when the centrifuge is running.
Start / Stop.................. Press the button to start the centrifuge. The centrifuge will brake to stop running if pressed during centrifugation.
Select.............................. Press to choose the parameter you wish to modify.
Adjustment Knob.... Rotate clockwise to increase parameter values. Rotate anti-clockwise to decrease parameter values. Press the
knob to switch between Speed and RCF.
1
2
3
4
5
The main display is shown above. The speed is set to 0rpm, the temperature of the centrifugal chamber is 35ºC and
the running time is 0 seconds. When the speed symbol is rotating, this indicates the centrifuge is running. The
rotation of the speed symbol increases with the spin speed of the centrifuge. The time symbol displays the ratio
of working to time setting. The total time setting is divided into 10 sections.
GCM-R-24

8
7. Rotor Preparation
CAUTION
• Do not overload samples into the centrifuge as this will cause leaking.
• Do not exceed the actual capacity allowed in this user manual.
7.1 Inspect the Rotor
Check the rotor for corrosion or scratches before using.
CAUTION
• If any abnormality such as corrosion or scratches are found, stop using the rotor and contact Globe Scientic.
• Only Globe Scientic rotors may be used with the centrifuge.
7.2 Symmetrically Load Tubes Into Rotor
IMPORTANT: The rotor should always be loaded in a balanced manner to avoid personal injury and to ensure
centrifuge longevity.
• When any tube is loaded, a tube of the same type, volume and weight must be added in the opposite rotor location.
• Never intentionally run the centrifuge in an unbalanced condition even if operation is not affected.
CAUTION
• Make sure the rotor and shaft are tightened. Otherwise, the rotor may come apart while operating and cause
damage to the centrifuge and rotor.
• Firmly tighen the rotor lid to the rotor.

9
8. Operation
CAUTION
• Do not push or lean against the centrifuge while it is running.
• Do not run the centrifuge when fragments or sample solutions are left in the centrifuge chamber. Always keep
the centrifugal chamber clean.
• If the centrifuge makes a strange noise during operation, stop it immediately and contact Globe Scientic.
Please include any warning code(s), if displayed.
8.1 Normal Operation
Turn on the power switch and the centrifuge will start self-diagnostic checks, see gure 8-1 below:
After self-diagnostics, the centrifuge will display the cumulative running time, see gure 8-2 below:
Figure 8-2 indicates the centrifuge has accumulated running time 312 hours 56 minutes and 45 seconds.
Then the centrifuge displays the last running parameters, see gure 8-3 below:
Speed: 15000rpm; running time: 12 minutes; centrifugal chamber temperature: 25ºC.
The lid lock is then released.
HELLO 88 88
ºC min
00312 56 45
15000 25 12
ºC minrpm
Figure 8-1 Self-check interface
Figure 8-2 Cumulative running time interface
Figure 8-3 Last running interface

10
LOADING AND REPLACING THE ROTOR
CAUTION
• Attach the rotor to the rotor shaft. Ensure the rotor is properly positioned and connected with the shaft,
tightening the locking nut to secure the rotor with shaft, to prevent the rotor damaging the centrifuge.
• Ensure the rotor lid is rmly secured to the rotor.
• Load the rotor onto the shaft and ensure the rotor is correctly positioned.
• You should feel a “click” when the rotor is properly connected to the shaft. If not, there may be something stuck between the
rotor and the shaft. Double check and clean if necessary.
• Rotate the rotor slightly with your ngers to check if the rotor moves, if it does you should reattach the rotor.
• Rotate the nut clockwise using the wrench to rmly tighten the rotor to the shaft.
• Close the rotor lid, rmly tighten the lid clockwise to the rotor and ensure it is positioned properly. Close the door and then
start running.
• The method of removing the rotor is the same as the above in reverse (turning the locking nut counterclockwise).
STANDBY COOLING (GCM-R-24)
When the centrifuge is powered on, the refrigeration system will cool down the chamber to the set temperature.
• The standby cooling will run automatically and control the chamber temperature once the lid is closed.
• The standby cooling will stop running once the lid is open.
NOTE
• When standby cooling is running, please don’t open the lid frequently to avoid gathering excessive condensation.
• To extend the life of the centrifuge, we recommended setting standby cooling setpoint above -4ºC.
8. Operation (Cont.)
START THE OPERATION
Press the Select button to select the desired parameters. The parameters can be modied when the value is ashing.
Rotate the Adjustment Knob clockwise to increase parameter value. Rotate the Adjustment Knob counter clockwise to
decrease parameter value. Rotate the Adjustment Knob faster and the parameter value will increase faster. The minimum
speed increment is 10 rpm, the minimum time increment is 1 second.
1. Set the speed
• Press the Select button until the speed rpm is displayed.
• When the Speed button is selected, the speed symbol will ash the speed value.
• The minimum speed value you can set is 500rpm; the minimum increment is 100 rpm.
• Rotate the Adjustment Knob clockwise to increase speed value. Rotate the Adjustment Knob anti-clockwise to
decrease speed value.
• There is a circulating function to increase/decrease the speed values. Rotate the Adjustment Knob clockwise to
change settings from small » large » maximum » minimum. Rotate the Adjustment Knob anti-clockwise to change
settings from large » small » minimum » maximum.
2. Set the time
• Press the Select button, the time value ashes in the time setting mode.
• Rotate the Adjustment Knob to set the running time from 30 seconds up to 99 minutes.
• When the time displays HD, the centrifuge is in continuous running mode.
3. Set the temperature (GCM-R-24)
• Press the Select button, the temperature value will ash into temperature set mode.
• Rotate the Adjustment Knob, and input a temperature value ranging from -20ºC to 40ºC.
• When the Temperature Symbol ashes, this indicates the refrigeration system is running, not ashing indicates the
refrigeration is not running.
4. Press the Start / Stop button to start running
• The lid must be locked before rotor starts rotating.
• The timer will begin counting down once the speed setting value is reached, the screen then displays the
remaining run time.
5. View and modify the operation programs
• Pressing the Select button returns the display to the programming interface and displays program setting. Press the
Select button to the desired program. When ashing, rotate the Adjustment Knob to modify values. Release the
button after 5 seconds, and the centrifuge will return to normal operation mode and run according to the new value.
• If the set time value has been modied, the operation time is not affected and will continue.
6. Warning display
• If an error occurs during operation the centrifuge will brake to stop automatically and then display the error code on the
time/display area. The error code can be checked in table 10-1, and corrective actions can be performed accordingly.
Load the rotor to the shaft Load the rotor lidSymmetrically load centrifuge tubes to rotor
Locking nut Rotor lid Knob

11
8. Operation (Cont.)
START THE OPERATION
Press the Select button to select the desired parameters. The parameters can be modied when the value is ashing.
Rotate the Adjustment Knob clockwise to increase parameter value. Rotate the Adjustment Knob counter clockwise to
decrease parameter value. Rotate the Adjustment Knob faster and the parameter value will increase faster. The minimum
speed increment is 10 rpm, the minimum time increment is 1 second.
1. Set the speed
• Press the Select button until the speed rpm is displayed.
• When the Speed button is selected, the speed symbol will ash the speed value.
• The minimum speed value you can set is 500rpm; the minimum increment is 100 rpm.
• Rotate the Adjustment Knob clockwise to increase speed value. Rotate the Adjustment Knob anti-clockwise to
decrease speed value.
• There is a circulating function to increase/decrease the speed values. Rotate the Adjustment Knob clockwise to
change settings from small » large » maximum » minimum. Rotate the Adjustment Knob anti-clockwise to change
settings from large » small » minimum » maximum.
2. Set the time
• Press the Select button, the time value ashes in the time setting mode.
• Rotate the Adjustment Knob to set the running time from 30 seconds up to 99 minutes.
• When the time displays HD, the centrifuge is in continuous running mode.
3. Set the temperature (GCM-R-24)
• Press the Select button, the temperature value will ash into temperature set mode.
• Rotate the Adjustment Knob, and input a temperature value ranging from -20ºC to 40ºC.
• When the Temperature Symbol ashes, this indicates the refrigeration system is running, not ashing indicates the
refrigeration is not running.
4. Press the Start / Stop button to start running
• The lid must be locked before rotor starts rotating.
• The timer will begin counting down once the speed setting value is reached, the screen then displays the
remaining run time.
5. View and modify the operation programs
• Pressing the Select button returns the display to the programming interface and displays program setting. Press the
Select button to the desired program. When ashing, rotate the Adjustment Knob to modify values. Release the
button after 5 seconds, and the centrifuge will return to normal operation mode and run according to the new value.
• If the set time value has been modied, the operation time is not affected and will continue.
6. Warning display
• If an error occurs during operation the centrifuge will brake to stop automatically and then display the error code on the
time/display area. The error code can be checked in table 10-1, and corrective actions can be performed accordingly.

12
END THE OPERATION
1. The centrifuge will brake when it reaches the set time or when the Start / Stop button is pressed.
• When the rotor stops rotating, the centrifuge will start beeping to alert the operation has nished.
2. Open the lid
• The lid will be released automatically when the operation has stopped (GCM-24).
• The centrifuge keeps the lid closed when operation has stopped (GCM-R-24).
• With the lid closed, you are able to press the Open / Lock Door button to open it.
• After ending centrifuge operation, the program will store the setting parameters of this operation and will recall these
parameters when restarting the program.
3. Remove the rotor and samples.
8.2 RCF Operation
1. Turn on the Power Switch
2. Set an RCF (Relative Centrifugal Force) value
CAUTION
• Do not exceed the allowable maximum RCF value of the rotor and adapters (section 11).
• Press the Select button and choose speed unit ×g, the speed symbol will then ash into RCF value input status.
• If no button is pressed after the speed value has ashed after 5 seconds, the input mode will be shut down.
• Rotate the Adjustment Knob to input an RCF value; the RCF increment is 10×g.
3. Set time and start operation as described in Section 8.1.
8.3 Pulse Operation
This function is used to remove residual sample material that may have adhered to the interior of tubes or for quick spins.
NOTE:The Pulse button works only when the rotor is stopped and the lid is locked.
1. Turn on the power switch and load the rotor onto the shaft, tighten the rotor lid and make sure it is in secured
position, and then close the lid.
2. The centrifuge goes into preparation mode and displays the values of the last run.
3. Press the Pulse button and hold; the centrifuge will then speed up to the set speed. When releasing the Pulse button
during acceleration, the centrifuge will start to decelerate and stop.
8. Operation (Cont.)

13
9. Maintenance
9.1 Cleaning
CAUTION
• Failure to follow the recommended instructions for cleaning and disinfecting may result in damage to the centrifuge.
1. Centrifuge
• If the centrifuge is exposed to ultraviolet rays for a long period of time, the lid may discolor or the label may be peel off.
It is recommended to cover the centrifuge with a piece of cloth to protect it from direct exposure or to move it from
direct exposure.
• If the centrifuge needs cleaning, clean it with a cloth or sponge moistened with a neutral detergent solution.
• Sterilize the centrifuge by wiping with a cloth moistened with a 70% ethanol solution.
2. Rotor Chamber
CAUTION
• Do not directly pour water, neutral detergent or disinfectant solution into the rotor chamber, otherwise uids
may leak into the drive units and cause corrosion or deterioration to the bearings.
• If the rotor chamber needs cleaning, clean with cloth or sponge moistened with a neutral detergent solution. Sterilize
the centrifuge by wiping with a cloth moistened with a 70% ethanol solution.
3. Drive Shaft
• We recommend regular maintenance for the drive shaft. You can wipe the drive shaft with a soft cloth and then
apply a thin coat of silicon grease.
4. Lid
• Clean and sterilize the lid using the same method as in step one above.
5. Rotor
• To prevent corrosion, remove the rotor from the rotor chamber. If not in use for a long period of time, then detach
the rotor lid and turn the rotor upside down to keep the tube cavities dry and clean.
• For sample leaks in the rotor, rinse the rotor with water. Apply a thin coat of silicon grease to the rotor when it is
completely dry.
• The rotor should be checked every 3 months to ensure the tube and rotor cavities are clean and to apply a thin coat
of silicon grease.
6. Drain (GCM-R-24)
• The centrifuge is equipped with drain pipe for condensation. Drain off condensation when water is in the drain pipe.

14
9.3 Routine Inspection
1. Check that the centrifuge is on a sturdy, at and level surface with all four feet seated rmly on the surface.
2. Check that the centrifuge is grounded properly. Use a multimeter to check if there is a short circuit between the
power cord grounding pin and the motor shaft. If an open circuit is found, contact Globe Scientic before use.
Replaceable Wearing Parts Replacement conditions
Lid Sealing Ring
CrackedTemperature Sensor Rubber Housing
Seal Ring of Centrifuge Chamber (GCM-R-24)
9. Maintenance (Cont.)
9.2 Consumables
Replaceable wearing parts are listed below. It is recommended to replace these according this table.

15
10. Troubleshooting Tips
10.1 Possible Problems and Solutions
This centrifuge has a self-diagnostic function. If a problem occurs, an error/warning code will be displayed on the time
display screen and the operator can determine the malfunction with the alarm code below.
Problem Cause
Nothing displays on the screen when the
Power Switch is turned on
Building circuit breaker or GFI
receptacle has tripped
Reset the circuit breaker or
GFI receptacle and turn on
Power Switch.
The fuse has blown. Replace the fuse.
Alarm code displayed
E-02
Lid fault
The lid opened during operation. Close the door immediately.
Press the Start/Stop button
while the door is opening.
Close the door and then start
normal operation.
E-04
Temperature
fault
Air vents are blocked. Clean air vents.
Radiator fan is damaged. Replace radiator fan.
E-06
Incorrect
parameter
The set parameter exceeds
the allowable range.
Modify the set
parameter value.
E-10~86 Refer to service manual Contact Globe Scientific
10.2 How to Open the Lid
WHEN POWERED ON
CAUTION
• The lid should only be opened when the rotor has come to a complete stop.
1. Turn on the Power Switch; the lid is then released automatically.
2. The lid lock will be released automatically once the operation is nished.
3. It is possible to release the lid by pressing the Door button when the rotor has stopped.

16
10. Troubleshooting Tips (Cont.)
IN THE CASE OF POWER OUTAGE
The lid will not open automatically if there is a power outage. It is possible to open manually as follows:
1. Ensure the rotor has stopped rotating.
• Listen carefully to ensure no rotation can be heard.
2. Insert a screw driver into each lid release hole to open the lid.
• Holes are located on the left and right sides of the unit.
• Carefully insert a screw driver into the lid release holes and push forward to release the lid.
10.3 Replacing Fuses
1. There are two fuses in the GCM-24: 250V, 5A time-delay type, size: ф 5×20. There are two fuses of GCM-R-24: 250V,
10A time-delay type, size: ф 5×20.
2. The fuse holder is located in the power inlet.
• Pull out the fuse holder tray from the power inlet and replace the fuses if necessary.
11. Rotor Instructions
CAUTION
• Read the instructions thoroughly to properly load and use the rotor.
• Do not exceed the allowable maximum speed of the rotor, tube and adapters etc. Ensure the allowable
maximum speed of the adapters is lower than the rotor’s maximum speed.
11.1 Rotor Structure
Knob
Sealing ring
Locking Nut Cover
Shaft Hole

17
11. Rotor Instructions (Cont.)
AVAILABLE ROTORS AND ADAPTERS
All rotors are considered bio-safe when the rotor lid is tightened to the rotor. In this condition, centrifuge tubes will be
enclosed in the rotor and ensures the sample and its aerosols do not leak during centrifugation.
If the rotor lid is not available, the rotor is not considered bio-safe. The rotors can be used as follows:
Rotor Type Tube Size / Type Adapters
Required
Maximum
speed (rpm)
Maximum
centrifugal
radius (cm)
Maximum
RCF (×g)
GCM-24-2ML
2.0/1.5ml tube 15000 8.5 21380
0.2ml PCR tube GCM-24-AD2 15000 6.9 17350
0.5ml PCR tube GCM-24-AD5 15000 7.6 19100
GCM-24-05ML
0.5ml PCR tube 15000 8.5 21380
0.2ml PCR tube GCM-24-AD52 15000 7.6 19100
GCM-24-PCR 0.2ml PCR tube 6.5/
7.2
16350/
18100
NOTE:The centrifuge rotor can separate samples with a density lower than 2.0g/ml. If the sample density is over
2.0g/ml, calculate allowable speed using the following formula:
12. Calculating RCF
The RCF can be determined with the following formula:
RCF = 1.118 × r × n2× 10-5
r = rotating radius, unit: cm; n = rotating speed, unit: rpm

18
13. Returning and Disposal
13.1 Returning the Unit
Before returning the unit, a transport securing device must be installed.
Before the unit or its accessories are returned to Globe Scientic, they must be decontaminated and cleaned to protect
people, the environment and property.
13.2 Disposal
Before disposal, the device must be decontaminated and cleaned to protect people, the environment and property. When
you are disposing of the device, the respective statutory rules must be observed.
Pursuant to guideline 2002/96/EC (WEEE), all devices supplied after August 13, 2005 may not be disposed of as part
of domestic waste. The device belongs to group 8 (medical devices) and is categorized in the business-to-business eld.
The icon of the crossed-out trash can shows that the device may not be disposed of as part of domestic waste. The waste
disposal guidelines of the individual EC countries may vary. If necessary, contact your supplier.
14. Ordering Information
Item # Descriptions
GCM-24 Centrifuge, Micro, 24-Place, High Speed, 120v, 60Hz, US Plug
(Includes: 24-Place Rotor with Lid for 1.5mL and 2.0mL Microcentrifuge Tubes #MC-24-2ML)
GCM-24-UK Centrifuge, Micro, 24-Place, High Speed, 230v, 50Hz, UK Plug
(Includes: 24-Place Rotor with Lid for 1.5mL and 2.0mL Microcentrifuge Tubes #MC-24-2ML)
GCM-24-EU Centrifuge, Micro, 24-Place, High Speed, 230v, 50Hz, EU Plug
(Includes: 24-Place Rotor with Lid for 1.5mL and 2.0mL Microcentrifuge Tubes #MC-24-2ML)
GMC-R-24 Centrifuge, Micro, Refrigerated, 24-Place, High Speed, 120v, 60Hz, US Plug (Includes: 24-Place
Rotor with Lid for 1.5mL and 2.0mL Microcentrifuge Tubes #MC-24-2ML)
GMC-R-24-UK Centrifuge, Micro, Refrigerated, 24-Place, High Speed, 230v, 50Hz, UK Plug (Includes: 24-Place
Rotor with Lid for 1.5mL and 2.0mL Microcentrifuge Tubes #MC-24-2ML)
GCM-R-24-EU Centrifuge, Micro, Refrigerated, 24-Place, High Speed, 230v, 50Hz, EU Plug (Includes: 24-Place
Rotor with Lid for 1.5mL and 2.0mL Microcentrifuge Tubes #MC-24-2ML)