JOANALAB DM1424 - JDM1424

Hematocrit Centrifuge

JOANLAB Laboratory Instruments

Before using centrifuge, please carefully read this user manual for efficient operation and safety.

Contents
Copyright: ...................................................................................................................................................... 1
Safety Reminder ............................................................................................................................................. 2
1. Specifications ............................................................................................................................................. 4
2. Declaration of Conformity ......................................................................................................................... 4
3. Required Operational Conditions ............................................................................................................... 5
3.1 Basic operational conditions ............................................................................................................ 5
3.2 Transport and storage conditions ...................................................................................................... 5
4. Installation .................................................................................................................................................. 5
4.1 Location............................................................................................................................................ 5
4.2 Connection of the power cord and grounding .................................................................................. 6
5. Structure ..................................................................................................................................................... 6
6. Operation panel .......................................................................................................................................... 7
7. Rotor Preparation ....................................................................................................................................... 8
7.1 Prepare the samples .......................................................................................................................... 8
7.2 Inject the samples into tubes ............................................................................................................ 8
7.3 Keep the tubes balanced ................................................................................................................... 8
7.4 Inspect the rotor ................................................................................................................................ 8
7.5 Symmetrically load centrifuge tubes into rotor ................................................................................ 9
8. Operation .................................................................................................................................................... 9
8.1 Normal operation.............................................................................................................................. 9
8.2 RCF operation ................................................................................................................................ 12
8.3 Pulse operation ............................................................................................................................... 13
9. Maintenance ............................................................................................................................................. 13
9.1 Cleaning ......................................................................................................................................... 13
9.2 Consumables .................................................................................................................................. 14
9.3 Routine inspection .......................................................................................................................... 14
10. Troubleshooting...................................................................................................................................... 15
10.1 Possible problems and solutions................................................................................................... 15
10.2 How to open the door ................................................................................................................... 16
10.3 Replacement of fuses.................................................................................................................... 16
11. Instructions for the rotor and tubes ......................................................................................................... 16
11.1 Rotor instructions ......................................................................................................................... 17
11.2 Tubes ............................................................................................................................................ 19
12. Calculate RCF ........................................................................................................................................ 20
13. Ordering information.............................................................................................................................. 20
14．Warranty ............................................................................................................................................... 21
14.1 Warranty of centrifuge .................................................................................................................. 21
14.2 Warranty of the rotor .................................................................................................................... 21
After-sales service ........................................................................................................................................ 21
 Copyright:
No part of this manual may be reproduced or transmitted without prior written permission of DLAB .
We can not be responsible to inform at real-time if the outline and specifications of centrifuge are subject
to change for improvement.
VERSION201204

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 Safety Reminder
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 definitions 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 centrifuge

Caution notes indicate any condition or practice, which if not strictly observed or remedied, could result in
damage or destruction of the centrifuge.

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
have any troubles with this centrifuge, 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 flammable samples.
 Do not install the centrifuge in or near places where inflammable gases are generated or chemicals are
stored.
 Do not place dangerous materials within 30cm of the centrifuge.
 Prepare all necessary safety measures before using samples that are toxic, radioactive or contaminated

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 with pathogenic micro-organisms. Use of these is at your own responsibility.
 If the centrifuge, rotor and accessories that have been contaminated by solutions with toxic,
radioactive or pathogenic materials, clean it according to the decontamination procedure as specified.
 If you require service at site, 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, insure hands are dry before handling the power cord or turning on/off the
power switch.
 For safety purposes, do not enter within 30cm around this centrifuge when it is in operation.
 While the rotor is rotating, never release the door lock.
 Unauthorized repairs, disassembly, or modifying the centrifuge except by our service center are
strictly prohibited.

CAUTION
 This centrifuge must be located on a firm 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 fingers or hands between the door and cover while the door is open.
 Do not move or relocate the centrifuge when it is running.
 If fluid spills in the rotor chamber, please promptly clean and dry with a dry cloth to avoid sample
contamination.
 Ensure to remove any objects and fragments of the tubes dropped inside the rotor chamber before
running the centrifuge.
 Cautions with rotor

(1) Always check for corrosion and damage on the rotor surface before using it. Do not use the rotor
if an abnormality is found.
(2) Do not set the speed beyond the allowable minimum speed of the rotor kits (rotor and adapters).
Make sure to run it below the allowable maximum speed.
(3) Do not exceed the allowable imbalance.
(4) Use the rotor and tubes within their actual capacities.
(5) If the rotor is attached with a lid, ensure it is tightened before operation.
 If any abnormal condition occurs during operation, please stop it immediately and contact our service
center. Notify the service center is a warning code if displayed.

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 Vibrations are likely to damage the centrifuge, contact our service center if abnormality observed.

1. Specifications
14000rpm(200-14000rpm) increment: 10rpm（A24-2P）
Maximum speed
12000rpm(200-12000rpm) increment: 10rpm（AC24P）
18620×g, increment: 10×g（A24-2P）
Maximum RCF
13680×g, increment: 10×g（AC24P）
Maximum capacity A24-2P(2ml/1.5mL/0.5mL/0.2mL×24); AC24P(Capillary tubes×24)
Timer 30seconds -99minutes-HOLD, continuous operation
Driving Motor Brushless DC motor
Dual door interlock, Over-speed detector, Over-temperature detector, Automatic
Safety devices
internal diagnosis
Power Single-phase, 220V-240V, 50Hz/60Hz, 5A.
requirements 110V-120V, 50Hz/60Hz, 5A

Dimensions（mm） （L）280×（W）364×（H）266

Weight 12kg
Additional features Speed/RCF switch, Pulse operation, Processing display, Voice reminder

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: 2006/95/EC
This ISM device complies with Canadian ICES-001.

Changes or modifications 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

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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 Operational Conditions

3.1 Basic operational conditions
（1）Power:
Single-phase, 220V-240V, 50Hz/60Hz, 5A; 110V-120V, 50Hz/60Hz, 5A
（2）Ambient temperature: 2℃~40℃.
（3）Relative humidity: ≤80%.
（4）No vibration and airflow around.
（5）No electric dust, explosive and corrosive gases around.

3.2 Transport and storage conditions

（1）Storage temperature: -40℃~55℃.
（2）Relative humidity: ≤93%.

4. Installation
This section describes the instructions that you should abide when install the centrifuge to ensure your
safety and the 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 this centrifuge on a firm、flat and level surface, ensure the four feet of this centrifuge stand on
the counter firmly. Avoid installing on a slippery surface or surface prone to vibration.
（2）Ideal ambient temperature is 20℃±5℃, avoid placing the centrifuge in direct sunlight if temperature
exceeds 30℃.
（3）Keep clear of the centrifuge at least 10cm on both sides and at least 30cm behind it to guarantee the
cooling efficiency.
（4）Keep away from heat or water to avoid sample temperature issues or centrifuge failures.

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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.
An minimum 10A outlet providing a sufficient ground is required, and this must meet local safety
requirements.

5. Structure
Door lock hook

Seal ring of door

Cover
ring seal ring

Operation panel

POWER switch

Figure 5.1 Front view of the centrifuge

Door View port

Air vents

Outlet

Figure 5.2 Rear view of the centrifuge

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6. Operation panel
Speed display area Temperature display area Time display area

12000rpm 25 ℃ 12 min

（1）
（5）
（2） （4） Figure 6-1 Operation panel （3）

Item Symbol Name Function

1 When the door closed, press and hold the button to accelerate speed,
Pulse button
release the button to stop it.
2 Open/ lock Press the button to open the door. The button is not available when the
button centrifuge is running.

Select button Press the button to choose the program which you want to modify.
3

Start/ Stop Press the button to start running. The centrifuge will brake and stop
4
button running if pressed during centrifugation.
Clockwise rotate to increase program values. Rotate anti-clockwise to
Program
5 decrease program values.
button
Press the button, shift between speed and RCF display.

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 12000 rpm 25 ℃ 12 min

Figure 6-2 The main interface

Main interface is as figure 6-2. The speed is set to be 14000rpm, temperature of centrifugal chamber is
25℃, and the running time is 12 minutes. When speed symbol is rotating, this indicates the centrifuge is
running. If the rotation is faster, the speed is higher. Temperature of chamber is displayed and cannot be
controlled. Time symbol displays the ratio of working to time setting. The total time setting is divided
into 10 sections.

7. Rotor Preparation
7.1 Prepare the samples

7.2 Inject the samples into tubes

CAUTION
 Do not overload samples into the centrifuge which will cause leaking.

 Do not exceed the actual capacity allowed in the user manual.

7.3 Keep the tubes balanced

 Although the centrifuge can accept sample balancing by eye, we recommend that you keep this
centrifuge in a well-balanced condition to extend its life expectancy.
 Never intentionally run the centrifuge under an unbalanced condition even though the allowable
imbalance is not exceeded.

7.4 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 our
service center.
 Only manufacturer‟s rotors must be used with the unit.

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7.5 Symmetrically load centrifuge tubes into rotor
CAUTION
 Make sure the rotor lid is securely fixed on the rotor, as well as the rotor and shaft are tightened.
Otherwise, the rotor may be moved off while rotating and cause damage to the centrifuge and rotor.
 Firmly tighten the rotor lid to the rotor.

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 strange noise during operation, stop it immediately and contact our service
center. Notify them of the warning code if displayed.

8.1 Normal operation

Turn on the power switch, centrifuge will start self-diagnostic checks, see figure 8-1 below:

HELLO 88 ℃ 88 min

Figure 8-1 Self-checking interface

After self-diagnostics, the centrifuge will display the accumulative running time, see figure 8-2 below:

00312 56 45
Figure 8-2 Accumulative running time interface

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Figure 8-2 indicates the centrifuge has accumulated running time 312 hours 56 minutes and 45 seconds,
and then the centrifuge displays the last running parameters, see figure 8-3 below:

12000 rpm 25 ℃ 12 min

Figure 8-3 Last running interface

 Speed: 14000rpm; running time: 12minutes; centrifugal chamber temperature: 25℃

 Release the door.
8.1.1 Load and replace the rotor

Load the rotor to the shaft Locking nut Load the rotor lid
Figure 8-4 Load the rotor

CAUTION
 Attach the rotor to the rotor shaft. Ensure the rotor is in position 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 firmly tightened to the rotor.

 Load the rotor to the shaft to ensure rotor is in position until it connected with the shaft.
 You should feel a „click‟ when the rotor is properly loaded on the shaft. If not, there may be something
stuck between the rotor and the shaft. Double check and clean it if necessary.
 Rotate the rotor slightly with your fingers to check if the rotor vibrates, if so attach the rotor again.
 Rotate the nut clockwise using the wrench to tighten the rotor to the shaft firmly.
 Close the rotor lid, firmly tighten clockwise the lid to the rotor and ensure is in position. Close the
door and then start running.
 The method of removing the rotor is as same as the above mentioned by turning the locking nut
counterclockwise.

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8.1.2 Set the operation programs

Press the button to select required program. The parameter can be modified when the program is

flashing. Rotate the program button clockwise to increase parameter value. Rotate the program
button clockwise to decrease parameter value. Rotate the program button 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 flash the speed value.
 The minimum speed value you can set 200rpm, the minimum increment is 10rpm.
 Rotate program button clockwise to increase speed value. Rotate the program button
anti-clockwise to decrease speed value.
 You can speed-up set the speed value by rotating program button quickly.
 There is a circulating function to increase/decrease the speed values. Rotate the program button
clockwise to change settings from small → large → maximum → minimum. Rotate the program
button anti-clockwise to change settings from large → small → minimum → maximum.
（2）Set the time

 Press select button , time value flashes in the time setting mode.

 Rotate the program button to set running time from 30 seconds to 99 minutes.
 When the time displays HD, this is a continuous running mode.

8.1.3 Start the operation

（1）Press button to start running

 The door must be locked before rotor starts spinning.

 The timer will start once the rotor starts spinning, the screen displays the remaining run time.
（2）View and modify the operation programs
 Operation programs can be modified after the centrifuge reaches the set speed.

 Pressing the select button , returns the display to the program interface and displays setting

programs. Press the select button to the desired program. When flashing, rotate parameter

button 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 modified, the operation time is not affected and will continue.
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（3）Warning display
 If an error occurs during the operation, the centrifuge will brake to stop automatically, and display the
error code on the time/display area. The error code can be checked in the table 10-1, and corrective
actions can be applied accordingly.
8.1.4 End the operation

（1）The centrifuge will brake when it reaches the set time or button is pressed.

 When the rotor stops rotating, the centrifuge will start beeping to alert the operation has finished.
（2）Open the door
 The door can be released automatically when the operation has stopped.

 With the door closed, you are able to press the button to open it.

 After ending the operation, the program will store the setting parameters of this operation, and will
recall these parameters when restarting the program.
（3）Open the door and take out the rotor and samples.

8.2 RCF operation

（1） Turn on the power switch
（2） Set a RCF (Relative Centrifugal Force) value

CAUTION
 Do not exceed the allowable maximum RCF value of the rotor and adapters.

 Press the select button and choose speed unit ×g, the speed symbol will flash into RCF value

input status.
 If no button is pressed after the speed value has flashed after 5 seconds, the input mode will be shut
down.
 Rotate program button to input a RCF value, RCF increment is10×g.
（3）Set operating conditions
The other operation, please refer to the section 8.1.

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8.3 Pulse operation
This function is used to remove the residual samples adhered to the interior of the tubes or for quick spins.

Note：The button works only while the rotor stopped and the door is locked.

（1）Turn on the power switch and load the rotor to the shaft, tighten the rotor lid and make sure it is in
secured position, and then close the door.
（2）The centrifuge goes into preparation mode and displays last running values.

（3）Press knob and hold, the centrifuge will speed up to the setting speed. While releasing the

knob during acceleration, the centrifuge will start to decelerate and stop.

9. Maintenance
9.1 Cleaning
CAUTION
 If do not follow the recommended instructions for cleaning or disinfecting this may damage the
centrifuge.

（1）Centrifuge
 If the centrifuge is exposed to ultraviolet rays for a long time, the color of the door may be changed or
the label may be peel off. After using, cover the centrifuge with a piece of cloth to protect 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 70% ethanol solution.
（2）Rotor chamber

CAUTION
 Do not directly pour water, neutral detergent or disinfectant solution into the rotor chamber, otherwise
fluids may leak into the drive units and cause corrosion or deterioration to the bearings.

 If the rotor needs cleaning, clean with cloth or sponge moistened with a neutral detergent solution.
Sterilize the centrifuge by wiping with a cloth moistened with 70% ethanol solution.

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（3）Drive shaft
 We recommend regular maintenance for drive shaft. You can wipe the drive shaft with soft cloth, and
then apply a thin coat of silicon grease.
（4）Door
 Clean and sterilize the door using the same method as the section（1）above.
（5）Rotor
 To prevent corrosion, remove the rotor from rotor chamber. If not in use for a long term, then detach
the rotor lid and turn upside down to dry the tube holes and keep 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 holes keep are clean and
apply a thin coat of silicon grease.

9.2 Consumables
Replaceable wearing parts listed below. It is recommended to replace these according this table.
Item Replacement parts Replacement conditions
1 Seal ring of door
Cracked
2 Rubber housing of temperature sensor

9.3 Routine inspection

(1) Check that the centrifuge is on a firm, flat and level surface, ensure the four feet are seated on the
surface firmly.
(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, check for reasons
and troubleshoot before use.

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10. Troubleshooting
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.

Symptom Causes Solutions

Nothing appears on the screen when the ·Facility power circuit ·Correct and turn on the
power is turned on. breaker tripped. power.
·The fuse has blown.
·Replace the fuse.
Error code appeared on the E-02 ·The door opened while ·Close the door
time display screen Door fault running. immediately.
·Close the door，and then
·Press the button
start to operate.
with the door opened.
E03 The centrifuge cannot ·Use the correct rotor.
Rotor identify identify the rotor. ·Replace rotor identify
fault connection.
E-04 ·The air vents are blocked. ·Clean air vents.
Temperature ·Radiator fan is damaged. ·Replace radiator fan.
fault
E-06 ·The setting value exceeds ·Modify the set value.
Set wrong the allowable range.
value
E-10～86 ·Read the service manual. ·Contact the service center.

Table 10-1 Possible problems and solutions

 Alarm codes E-1～E-9 are related to incorrect operation/programming. You can continue running the
centrifuge after implementing corrective procedures.

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10.2 How to open the door
10.2.1 In the case of power on

CAUTION
 The door just can be opened while the power is on and rotor stops rotating.

（1） Turn on the power switch, release the door automatically.

（2） The door will be released automatically once the operation is finished.

（3） It is available to release the door by press button once the rotor stops.

10.2.2 In the case of power outage

The door cannot be opened automatically if there is a power outage. It is available to be opened manually

as follows.

（1）Ensure if the rotor has stopped rotating.

 Listen carefully to ensure no rotating sound can be heard.
（2）Insert a screw driver into a hole to open door.
 Holes are located on the left and right sides of the unit.
 Insert a screw driver into the two holes and push forward to release the door.

10.3 Replacement of fuses

（1）There are two fuses, 250V, 5A time-delay type, size: Ф5×20. There are two fuses of Hematocrit
Centrifuge, 250V, 10A time-delay type, size: Ф5×20.
（2）The fuse holder is located in the power inlet. Pull out the fuse holder from power inlet and replace the
fuses if necessary.

11. Instructions for the rotor and tubes

CAUTION
 Read the instructions thoroughly, to properly load and use rotor.
 Do not exceed the allowable maximum speed of rotor, tube and adapters etc. Ensure the allowable
maximum speed of adapters is lower than the rotor‟s maximum speed.

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11.1 Rotor instructions
11.1.1 Rotor structure

Lid Fastener Locking nut

Shaft hole

Figure 11-1 The rotor structure

11.1.2 Hematocrit rotor AC24

(1) introduce

Lid

Reading lid

Screw nut

Capillaries

rotor body

(2) installation

Tight the screw nut the lid installation

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11.1.3 Available rotors and adapters
All the rotors are made of plastic, they cannot be high-pressure sterilization and UV irradiation, only
ordinary sterilization can be used.

Maximum
Maximum
Rotor ID centrifugal Maximum RCF
Tubes Adapters speed
type code radius Rcf (×g)
(rpm)
rmax (cm)
24-2/1.5ml tube 14000 8.5 18620
24-0.2ml PCR
1 A24-2P A02P2 14000 6.9 15110
tube
24-0.5ml micro
A05P2 14000 7.6 16638
tube
2 AC24 24-ø1.75×75 12000 8.5 13680

Table 11.1 Rotors and adapters

11.1.3 Notice
(1) The centrifuge rotor can separate samples with a density lower than 2.0g/ml. If the samples density is
over 2.0g/ml, please calculate allowable speed depending on the following formula.
Allow Speed (rpm)= Maximum speed×(2.0(g/ml)/Sample density (g/ml))1/2
(2) To prevent corrosion, remove the rotor from rotor chamber if not in use for a long term, then detach the
rotor lid and place upside down to dry the tube holes.
(3) If samples have leaked in the rotor holes, wash the hole with water, apply a thin coat of silicon grease
on the rotor surface after drying.
(4) It is necessary for a regular rotor maintenance and should be cleaned every 3 months to keep the tube
holes and shaft clean. Apply a thin coat of silicon grease.

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11.2 Tubes
11.2.1 Cleaning and sterilizing tubes

O：Applicable X：Inapplicable
Conditions Materials PA PC PP
Acidic（pH5 or lower） X X X
Acidic（higher than pH5 ） O O O
Alkaline（higher than pH9 ） O X O
Cleaning

Cleaning fluids Alkaline（pH9 or lower） O O O

Neutral（pH7） O O O
Warm water(up to 70℃) O O O
Ultrasonic cleaning Neutral detergent（pH7） O O O
2
115℃（0.7kg/cm ）30minutes O O O
Autoclaving 121℃（1.0kg/cm2）20 minutes X O O
Sterilization

2
126℃（1.4kg/cm ）15 minutes X X X
Boiling 15 to 30 minutes O O O
Ultraviolet sterilization 200-300nm X X X
Gas sterilization Ethylene oxide O X O
Formaldehyde O O O
PA: Polyallomer PC: Polycarbonate PP: Polypropylene
Table 11.2 Cleaning and sterilizing conditions for tubes
11.2.2 Cleaning PC tubes
PC material is low in chemical resistance against alkaline solutions. Avoid using neutral detergents with
pH higher than 9. Note that pH of some neutral detergents are still higher than 9 even if diluted according
to the manufacturer‟s instructions. Use detergent with its pH between 7 and 9.

11.2.3 Autoclaving PA、PC and PP tubes

PA begins softening at about 120℃, PC and PP at about 130℃. Autoclave PA tubes at 115℃（0.7kg/cm2）
for 30 minutes, PC and PP tubes at 121℃（0.1kg/cm2）for 20 minutes. If a certain temperature is exceeded,
the tubes may be deformed.
When use a sterilizing chamber, please operate as follows:

(1) Place tubes in vertical position, mouths upward. If tubes are placed sideways, they may deform into an
oval shape due to gravity.
(2) Remove locking nut and lid to prevent from deformation or rupture.
(3) Wait until the sterilizing chamber cools down to the room temperature before removing tubes.

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11.2.4 Conditions and life expectancy of tubes
The life expectancy of plastic tubes depends on the characteristics of samples, speed of the rotor used,
temperature applied and so on. When the plastic tubes are used for ordinary aqueous samples (pH between
5.0 and 9.0), their life expectancies are defined as follows.
Be operated at the maximum speed:
High quality tubes (PA、PC、PP): 30-50 operations
Ordinary tubes(PA、PC、PP): around 10 operations（Using in low speed can extend the tube life）.
Life expectancy of tubes also depends on the pretreatment conditions such as cleaning and sterilization,
lifetime can be cut down.
Notice: Do not use damaged or cracked tubes.

12. Calculate RCF

An RCF can be determined with the following calculation formula.
RCF=1.118×r×n2×10-5
r—rotating radius, unit: cm; n—rotating speed, unit: rpm

13. Ordering information

Cat. No. Model Descriptions
Hematocrit Centrifuge ， with AC24P rotor kits, US plug,
912025537777 DM1424
110-120V, 50Hz/60Hz
Hematocrit Centrifuge ， with AC24P rotor kits, Cn plug,
912125527777 DM1424
220-240V, 50Hz/60Hz
Hematocrit Centrifuge，with AC24P rotor kits, Euro plug ,
912225527777 DM1424
220-240V, 50Hz/60Hz
Hematocrit Centrifuge ， with AC24P rotor kits, UK plug,
912325527777 DM1424
220-240V, 50Hz/60Hz

Accessories

Hematocrit rotor kits with a lid and a reading disk, 12000rpm,

19400015 AC24P
24 x capillary tubes, used with DM1424
Plastic rotor kits with lid, fixing clips and O'ring, 14000rpm,
19400013 A24-2P
2ml/1.5ml*24, used with DM1424
2ml to 0.2ml rotor adapter, used with A12-2, A12-2P, AS24-2
19500001 A02P2
and A24-2P rotors，24pcs/pk
2ml to 0.5ml rotor adapter, used with A12-2, A12-2P,
19500002 A05P2
AS24-2 and A24-2P rotors，24pcs/pk

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14．Warranty

14.1 Warranty of centrifuge

This centrifuge is guaranteed for two years from the date of delivery provided that it has been operated and
maintained properly.

14.2 Warranty of the rotor

The rotor is guaranteed for 5 years from the date of delivery upon manufacturer. Please pay attention, do
not use the rotor once it has been corrosion or fatigue damage. The warranties of the centrifuge and the
rotor become invalid in the case of the following conditions even if within the guarantee period expires:
(1) Failures caused by incorrect installation.
(2) Failures caused by rough or improper handling.
(3) Failures caused by conveyance or relocation after installation.
(4) Failures caused by unauthorized disassembly or modification.
(5) Failures caused by using non-standard spare parts or accessories and unauthorized
modification of the rotor or centrifuge.
(6) Failures caused by natural disasters including fire, earthquakes and so on.
(7) Consumables and parts have a limited guarantee period.

After-sales service

In order to ensure to operate centrifuge safely and efficiently, it is necessary for regular maintenance. If
centrifuge has problems, do not attempt to repair it by yourself. Contact our sales or service center.

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