lbx H20D Series User manual

H20D LCD Digital magnetic stirrer with heating
S20 Magnetic stirrer without heating
H20 Magnetic stirrer with heating
Please read the User Manual carefully before use, and follow all operating and safety instructions!
user manual
english / español / français

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User Manual
H20D LCD Digital magnetic stirrer with heating
S20 Magnetic stirrer without heating
H20 Magnetic stirrer with heating
Preface
Users should read this Manual carefully, follow the instructions and procedures, and beware of all
the cautions when using this instrument.
Service
If help is needed, you can always contact your dealer or Labbox via www.labbox.com
Please, provide the customer service representative with the following information:
Serial number (on the back side)
Description of the problem
Your contact information
Warranty
This instrument is guaranteed to be free from defects in materials and workmanship under normal
use and service, for a period of 24 months from the date of invoice. The warranty is extended only
to the original purchaser. It shall not apply to any product or parts which have been damaged on
account of improper installation, improper connections, misuse, accident or abnormal conditions of
operation.
For claim under the warranty, please contact your supplier.

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1. Safety Instructions
Warning!
•Read the operating instructions
carefully before use.
•Make sure only trained staff works
with the equipment.
Risk of burns!
•Caution when touching the housing
parts and the hotplate, which can
reach temperature of 350°C.
•Pay attention to the residual heat
after switching off the equipment.
Protective ground contact!
•Make sure that the socket is
earthed (with protective ground
contact) before use.
When working, wear personal protective equipment to avoid risks from:
-Splashing and evaporation of liquids
-Release of toxic or combustible gases
Set up the instrument on a spacious, stable, clean, non-slip, dry, and fireproof surface. Do not
operate the equipment in explosive atmospheres, with hazardous substances, or under water.
Increase the speed gradually. Reduce the speed if:
-The stirring bar c due to high speed
-The equipment is not running smoothly or the container moves on the base plate.
Temperature must always be set at least 50 ºC below the flash point of the media used.
Beware of hazards due to:
-Flammable materials or media with a low boiling temperature
-Overfilling of the container
-Unsafe container
Process pathogenic materials only in closed vessels.
If the stirring bar contains PTFE, please note:
-Elemental fluorine, three fluoride and alkali metals will corrode the PTFE and Halogen
alkanes expand at room temperature.
-Molten alkali, alkaline earth metals or their solution, as well as the powder in second and
third columns of the Periodic Table of Elements will react with PTFE if the temperature
reaches 300 ~ 400 ºC .

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Check the instrument and the accessories for damage prior to every use. Do not use damaged
components. A safe operation is only guaranteed with the accessories described in the
“Accessories” chapter. Accessories must be securely attached to the device and cannot come off
by themselves. Always disconnect the plug before the assembly or disassembly of accessories.
When the external temperature sensor is needed, the tip of the measuring sensor must be at
least 5-10 mm away from the vessel bottom and wall.
The equipment can only be disconnected from the main power supply by pulling out the mains
plug.
The voltage stated on the label must correspond to the main power supply.
Make sure that the cable does not touch the hotplate. Do not cover the device.
The instrument may only be opened by experts.
Keep away from high magnetic fields.
Observe the minimum distances between devices, between the device and the wall, and above
the device (min. 100 mm.)
>100mm
Figure 1

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2. Proper Use
The instrument is designed for mixing and/or heating liquids in schools, laboratories, or factories.
This device is not suitable for use in residential areas or other restrictions mentioned in Chapter 1.
3. Inspection
3.1 Unpacking
Unpack the equipment carefully and check for any damages that may have arisen during
transportation. Please contact the manufacturer/supplier for technical support.
Note:
If there is any apparent damage to the
system, do not plug it into the power
line.
3.2 Listing of Items
The package includes the following items:
Items
Qty
Main unit
1
Power cable
1
Stirrer bar
1
User Manual
1
Table 1
4. Control
4.1 Control elements
Figure 2: H20D series
LED Heat
LCD Screen
LED Stir
Heating Knob
Stiring Knob

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Figure 3: H20 series
Figure 4: S20 series
Figure 5: H20D, H20 and S20 series
Stiring Knob
LED Stir
Heating Knob
LED
Heat
Stiring Knob
LED Stir

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Items
Descriptions
H20D
series
Stirring knob
“Stir”
Set the rated rotary speed. The function “Stirring”
is switched ON or OFF by pushing the knob. To
increase the value turn the knob clockwise.
Heating knob
“Heat”
Set the temperature parameters. The function
“heating” is switched ON or OFF by pressing the
knob. To increase the value turn the knob
clockwise.
LCD screen
The LCD screen displays the real working state
and all the settings.
LED Heat
When the heating function is ON, the LED Heat is
lit.
LED Stir
When the stirring function is ON, the LED Stir is lit.
Power Switch
Switch the system ON or OFF.
H20
series
Stirring knob
“Stir”
Set the rotary speed in a safe stirring range
(between 0 and 1500 rpm). The function “Stirring”
is switched ON or OFF by pressing the knob. To
increase the value turn the knob clockwise.
Heating knob
“Heat”
Set the temperature parameters in a safe
temperature range (between room temperature
and 340°C). The function “heating” is switched ON
or OFF by pushing the knob. To increase the value
turn the knob clockwise.
LED Heat
While the heating function is ON, the LED Heat is
lit.
LED Stir
While the device is ON, the LED Stir is lit.
Power switch
Switch ON or OFF.
S20
series
Stirring knob
“Stir”
Set the rotary speed in a safe stirring range
between 0 and 1500 rpm. The function “Stirring” is
switched ON or OFF by pushing the knob. To
increase the value turn the knob clockwise.
LED Stir
While the device is ON, the LED Stir is lit.
Power switch
Switch ON or OFF.
Table 2

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4.2 Display (H20D series)
Figure 6
Characters
Descriptions
“Temp” and
“ºC”
Displays the temperature when the
heating function is ON.
“Stir” or “Mot”
Displays the stirring speed when the
stirring function is ON.
“Hot”
Displays a “Hot” warning if the
heating plate’s temperature is above
50°C after switching OFF the heating
function.
“Probe”
Displayed when using the external
temperature sensor.
“Remote”
Displayed when using the remote
control.
“Err”
Displayed in case of an error.
Set value/
Real value
Displays the real and set
temperature or stirring speed value
when the function is ON.
Table 3
Note：
If both the heating and stirring
functions are started at the same
time, the heating function is always
the priority. In that case, if the speed
is changed by turning the stirring
knob, the display will show the
stirring speed for 5 seconds and
then goes back to the temperature.
Error
Set value
Remote
control
External
probe
Hotplate
warning
Real
value
Stir or Mot
Temperature

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5. Trial Run
• Make sure the required operating voltage and the power supply voltage match.
• Ensure that the socket is properly grounded.
• Plug in the power cable to the system, then to the outlet. Make sure the power is on and begin the
initiation.
• Add the medium into the vessel with a magnetic stirring bar; make sure the magnetic stirring bar
has an appropriate size.
• Place the vessel on the work plate.
• Set the target stirring speed and start stirring.
• Observe the stirring bar (all series).
• Set the target temperature and start heating.
• Observe the LCD display (H20D series).
• Stop the heating and stirring functions.
If the operations above cause no abnormalities, the device is ready to operate. Otherwise, the device
may have been damaged during transportation, please contact the manufacturer/supplier for
technical support.
Warning!
Transfer of the vessel when the
instrument is working is
forbidden.
6. Function: Heating (H20D series)
6.1 H20D series
The device is controlled by a digital temperature control technology, which has two separate safe
circuits. The hotplate is kept at a constant temperature by a digital control circuit. The hotplate
temperature can also be monitored from a separate, adjustable safe circuit. The two internal
temperature sensors (PT1000) for temperature control are built into the hotplate. The single
external PT1000 can monitor the temperature of the sample.
•If using an external sensor PT1000: Always connect to the device BEFORE turning the power on
and insert it into the sample BEFORE heating (see section 6.1.1).
•Turn the equipment on by pressing the ON/OFF switch.
•Set the temperature by rotating the temperature control knob slowly towards the target value.
•While the heating function is on, the LED “Heat” lights up and the LCD screen displays the real
temperature.
•The temperature is displayed on the right side of the LCD screen as well as the “Temp” and “°C”
characters.
•The heating function is switched on or off by pushing the heating knob.

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The heating function will stop automatically under abnormal conditions.
In that case, please follow the instructions below:
•Switch OFF the instrument.
•If using external temperature sensors, ensure they are connected and inserted into the media to
be heated.
•Switch ON the instrument and run the heating function.
If the heating function did not work, please contact the manufacturer/supplier for technical support.
When the equipment is switched ON, it displays the speed and temperature parameters used on the
last use.
Generally, the LCD screen cannot show the real temperature of the medium in the vessel or on the
plate. Temperature differences exist in the following cases:
•Hotplate center and outer edge.
•The sample container and the container.
In order to ensure that the temperature inside the container is measured accurately, please use the
external temperature sensor PT1000.
Figure 7
The external temperature sensor PT1000 is the manufacture’s standard accessory that, compared to
the temperature control of the hotplate, can measure the sample’s temperature in a more precise
way.
•If the external temperature sensor is needed, it must be plugged in before the device is
switched ON.
•Ensure the external temperature sensors are firmly connected and submerged into the media
before heating (fig. 8).
•If the sensor is plugged in, “Probe” will be displayed on the digital display to indicate that the
sensor is operating. The set value of external temperature sensors and the actual temperature
are also displayed.
Warning!
Plugging in / Pulling out external
temperature sensors while the system
is functioning is forbidden.

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6.1.2 Residual heat warning (HOT)
In order to prevent the risk of burns from a hotplate, the digital hotplate has a residual heat
warning function. When the heating function is switched off and the heating plate temperature is
still above 50°C, “Hot” will flash on the screen to warn that there is a risk of burns from the hotplate.
When the hotplate temperature drops to below 50°C, the system will be automatically switched off.
If users want to turn off the LCD screen immediately, just pull out the plug directly. Once the plug is
pulled out, the residual heat warning function will stop running.
6.2 H20 series
The function “heating” is switched ON or OFF by rotating the knob.
While the heating function is ON, the LED Heat is lit.
7. Stirring
H20D series: The stirring function is switched ON/OFF by rotating the stirring knob. The speed is
adjusted with the knob, too. When both the heating and the stirring functions are on, the LCD will
display the set speed value for 5 seconds and then shift to the real temperature value.
H20 and S20 series: The stirring function is switched ON/OFF by rotating stirring knob. The stirring
speed is adjusted with the “Stir” knob.
8. Remote Control (H20D series)
Figure 8
The unit can be controlled from an external PC (using the necessary software) via the RS232C serial
interface integrated in the system. Data communication between the laboratory equipment and the
computer is only possible on demand of the computer.

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•The interface line’s functions between the laboratory equipment and the PC are selected from
the specified signals according to the EIA- RS232C, corresponding with DIN66020 Part 1. The
location of the connector can be seen in Figure 8
•Transmission method: Asynchronous signal transmission in start-stop-operation.
•Mode of transmission: Fully Duplex. 1 start bit; 7 character bits; 1 parity bit [straight (even)); 1
stop bit.
•Transmission speed: 9600 bit/s
•When this function is being used, the LCD screen displays “Remote”.
Note:
Forbidden to insert or remove the
RS232C communication line when the
equipment is on!
9. Faults
•Instruments cannot be switched ON
Check whether the power line is unplugged
Check whether the fuse is broken or loose
•Fault during self test
Switch OFF the unit, then switch back ON.
•Stir speed cannot reach set point
Excessive medium viscosity may cause an abnormal motor’s speed reduction.
•Unit does not turn off when pushing the ON/OFF switch.
Check if the residual heat warning function is still ON and the hotplate’s temperature is
above 50ºC (the LCD still work and “Hot” flash).
If these faults are not resolved, please contact the manufacturer/supplier.
10. Maintenance and Cleaning
•Proper maintenance can keep instruments working properly and lengthen their lifetime.
•Do not spray cleanser onto the instrument when cleaning.
•Unplug the power line when cleaning.
•Only use recommended cleansers:
Dyes
Isopropyl alcohol
Construction materials
Water containing surfactants
/ Isopropyl alcohol
Cosmetics
Water containing surfactants
/ Isopropyl alcohol
Foodstuffs
Water containing surfactants
Fuels
Water containing surfactants
Table 4

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•Before using any other cleaning or decontamination methods, the user must verify with the
manufacturer that the method will not harm the equipment. Wear the proper protective gloves
during cleaning of the instrument.
Note:
•The electronic device cannot be
cleaned with cleanser.
•If maintenance service is needed, the
equipment must be cleaned to avoid
contamination from hazardous
substances and shipped in its original
packing carton.
•If the instrument will not be used in a
long time, please power OFF and place
in a dry, clean, and stable location at
room temperature.
11. Associated Standards and Regulations
Construction in accordance with the following
safety standards:
EN 61010-1
UL 3101-1
CAN/CSA C22.2(1010-1)
EN 61010-2-10
Construction in accordance with the following
EMC standards:
EN 61326-1
Associated EU guidelines:
EMC-guidelines: 2004/108/CE
Instrument guidelines: 73/023/EWG
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 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.

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12. Specifications
Items
Specifications
H20D series
H20 series
S20 series
Voltage [VAC]
200-240
200-240
100-240
Frequency [Hz]
50/60
50/60
Power [W]
550
530
30
Stirring point position quantity
1
1
Max. stirring quantity (H2O) [l]
20
20
Max. magnetic bar [L×Ø, mm]
80×10
80×10
Motor type
DC brushless motor
Max. power input of motor [W]
18
18
Max. power output of motor [W]
10
10
Speed range [rpm]
100-1500,
increment: 10
0-1500
Rotary speed display
LCD
Scale
Plate material
Ceramic coated
Dimensions of workplate (mm)
Ø 135
Ø 135
Heating power [W]
500
500
Temperature range [°C]
RT-340, increment: 1
RT-340
Temperature display [°C]
LCD
Scale
Temperature display accuracy [°C]
±0.1
-
The safe temperature of hotplate [℃]
360
350
Temperature sensor in medium
PT1000
-
Control accuracy of heating
temp with temp
sensor [℃]
±0.2
-
Residual heat warning
50℃
-
Dimensions (mm)
280×160×85
Weight [kg]
2.8
2.8
Permitted ambient temperature [°C]
5-40
Permitted relative humidity
80%
Protection class acc. to DIN 60529
IP42
RS232 interface
Yes
No / No
Table 5

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13. Accessories
Please contact our company to order the following accessories available for these devices: magnetic
stirring bars, PT1000 temperature sensor with glass coated and support clamp for temperature
sensor.

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Manual de usuario
H20D Agitador magnético digital con calefacción
H20 Agitador magnético con calefacción
S20 Agitador magnético sin calefacción
Introducción
Los usuarios deben leer este manual cuidadosamente, seguir las instrucciones y los procedimientos,
y estar informados de todas las precauciones antes de usar este equipo.
Servicio
Cuando necesite ayuda, puede contactar con su distribuidor o con Labbox a través de:
www.labbox.com
Por favor proporcione al personal de Atención al Cliente la siguiente información:
Número de serie del equipo (en el panel trasero o en la parte inferior del equipo)
Descripción del problema
Sus datos de contacto
Garantía
Este equipo está garantizado contra cualquier defecto en los materiales y de fabricación bajo un uso
normal, por un período de 24 meses a partir de la fecha de la factura. La garantía se extiende
solamente al comprador original. La garantía no se aplicará a ningún producto o piezas que se
hayan dañado a causa de una instalación incorrecta, de conexiones incorrectas, de un uso erróneo,
de accidente o de condiciones anormales de operación.
Para las reclamaciones bajo garantía, por favor póngase en contacto con su proveedor.

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1. Instrucciones de seguridad
¡Advertencia!
•Lea el manual de instrucciones
detenidamente antes de usar el
equipo.
•Asegúrese de que solamente
personal debidamente formado
utiliza el equipo.
¡Riesgo de quemaduras!
•Tenga cuidado cuando toque
partes del chasis del equipo y el
plato calefactor puesto que puede
alcanzar temperaturas de hasta
350°C.
•Preste atención al calor residual
después de apagar el equipo.
¡Contacto a tierra de protección!
•Asegúrese de que la toma esté
conectada a tierra (contacto a tierra
de protección) antes de usar.
Durante el uso del equipo utilizar protección de seguridad personal para evitar riesgos debidos
a:
-Salpicaduras y evaporación de líquidos
-Emisión de gases tóxicos o combustibles
Coloque el equipo en una superficie espaciosa, estable, limpia, antideslizante, seca y a prueba
de fuego. No utilice el equipo en atmósferas explosivas, con sustancias peligrosas o debajo del
agua.
Aumente gradualmente la velocidad. Reduzca la velocidad si se producen las siguientes
situaciones:
-La varilla magnética se rompe debido a una elevada velocidad de agitación
-El funcionamiento del equipo es irregular, o el chasis se mueve sobre la base de la placa
La temperatura debe ajustarse siempre al menos 50 ºC por debajo del punto de combustión de
los medios utilizados.
Compruebe el equipo y los accesorios antes de cada uso. No utilice componentes en mal
estado. El funcionamiento seguro del equipo está garantizado solamente con los accesorios
descritos en el capítulo de “accesorios”. Los accesorios deben estar firmemente sujetos al
equipo y no pueden soltarse por sí mismos. Desconecte siempre la alimentación antes de
montar los accesorios.

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Materiales de proceso patógeno sólo en recipientes cerrados.
En caso de que la varilla magnética sea de PTFE, por favor tenga en cuenta:
-El flúor elemental, el ión trifluoruro, y los metales alcalinos provocan la corrosión del
PTFE y los hidrocarburos halogenados lo hacen expandir a temperatura ambiente.
-Los metales alcalinos fundidos, los alcalinotérreos o sus soluciones, así como los
elementos de la segunda y tercera columna de la Tabla Periódica de los Elementos en
polvo tendrán reacción química con el PTFE cuando la temperatura alcanza los 300 ~
400 ºC.
Sea consciente de los riesgos debido a:
-Materiales o medios inflamables con una temperatura de ebullición baja
-El llenado excesivo del recipiente
-Recipiente inseguro
Cuando necesite trabajar con el sensor de temperatura externo, el extremo del sensor debe
estar al menos a 5-10 mm de distancia del fondo del recipiente y de la pared.
El equipo sólo puede desconectarse de la línea eléctrica retirando el cable de alimentación de la
toma de red.
Comprobar que la toma eléctrica es del voltaje y potencia suficiente para este equipo.
Asegúrese que el cable de alimentación principal no esté en contacto con la placa. No cubra el
equipo.
Este equipo solo podrá ser abierto por técnicos electrónicos autorizados expertos.
Mantener el equipo alejado de campos electromagnéticos elevados.
Tenga en cuenta las distancias mínimas entre los equipos, entre el equipo y la pared y sobre el
montaje (mín. 100 mm)
>100mm
Figura 1

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2. Normas de uso
Este equipo está diseñado especialmente para mezclar y calentar líquidos para propósitos
educacionales, laboratorios o fábricas.
Este aparato no es adecuado para trabajar fuera del laboratorio u otras restricciones mencionadas
en el capítulo 1.
3. Inspección
3.1 Desembalaje
Desembale cuidadosamente el instrumento y verifique que el equipo y /o los accesorios hayan
llegado sin daños aparentes. En caso necesario póngase en contacto con el fabricante o el
proveedor del equipo para solicitar ayuda técnica.
Nota:
Si detecta cualquier daño aparente, por
favor no enchufe el equipo.
3.2 Lista de embalaje
El paquete incluye los siguientes elementos:
Contenido
Cantidad
Unidad principal
1
Cable de alimentación
1
Varilla magnética
1
Manual de usuario
1
Tabla 1
4. Control
4.1 Elementos de control
Figura 2: Modelo H20D
Pantalla
LCD
LED “Stir”
Botón de calefacción
Botón de agitación
LED “Heat”

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Figura 3: Modelo H20
Figure 4: Modelo S20
Figura 5: Modelos H20D, H20 y S20
Botón de agitación
LED “Stir”
Botón de
calefacción
LED “Heat”
Interruptor de
encendido
Botón de agitación
LED “Stir”