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7’’ Square (Hotplate) Magnetic Stirrer
User Manual
MS7-H550-Pro
LCD Digital 7”Square Hotplate Magnetic Stirrer
MS7-H550-S
LED Digital 7”Square Hotplate Magnetic Stirrer
MS7-Pro
LCD Digital 7”Square Plate Magnetic Stirrer
MS7-S
Classic 7”Square Plate Magnetic Stirrer
Please read the User Manual carefully before use, and follow all operating
and safety instructions!
Technical specifications and outline are subject to change without prior
notice.
www.dlabsci.com
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Contents
Preface ................................................................................. 1
Service ................................................................................. 1
Warranty .............................................................................. 1
1. Safety Instructions ....................................................... 2
2. Proper use .................................................................... 3
3. Inspection .................................................................... 4
3.1 Receiving Inspection ............................................. 4
3.2 Listing of Items ..................................................... 4
4. Control ......................................................................... 5
4.1 Control elements .................................................... 5
4.2 Display................................................................... 7
5. Trial run ....................................................................... 8
6. Working with external temperature sensor (Hotplate
Model) ................................................................................. 9
6.1 LCD digital hotplate model ................................... 9
6.2 LED digital hotplate model ................................... 9
7. Residual heat warning（HOT） ............................... 10
8. Remote Control (LCD Digital model) ....................... 10
9. Faults ......................................................................... 11
10. Maintenance and Cleaning ........................................ 11
11. Associated standards and regulations ........................ 12
12. Specifications ............................................................ 13
13. Ordering information ................................................. 15
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7” Square Hotplate Magnetic Stirrer
Preface
Welcome to the “ 7” Square Hotplate Magnetic Stirrer”.
Users should read this Manual carefully, follow the
instructions and procedures, and be aware of all the
cautions when using this instrument.
Service
When help needed, you can always contact the Service
Department of manufacturer for technical support.
Dragon Laboratory Instruments Limited
No.31, Yu An Road, Zone B of TianZhu Airport Industrial
Park, Shunyi District, Beijing, 101318 P. R. China
Tel: 86-10-85653451/52/53
Fax：86-10-85653383
E-mail: info@dragon-lab.com
Service Hotline: 400-1100-556
Http://www.dragon-lab.com
Please provide the customer care representative with the
following information：
• Serial number（on the rear panel）
• Certification
• Description of problem (i.e., hardware or software)
• Methods and procedures adopted to resolve the problems
• Your contact information
Warranty
This instrument is warranted 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 claims under the warranty please contact your local
supplier. You may also send the instrument directly to
manufacturer, enclosing the invoice copy and by giving
reasons for the claim.
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7” Square Hotplate Magnetic Stirrer
1. Safety Instructions
Warning!
• Read the operating instructions carefully
before use.
• Ensure that only trained staff works with the
instrument.
Risk of burn!
• Caution when touch the housing parts and
the hotplate which can reach temperature of
550°C.
• Pay attention to the residual heat after
switching off.
Protective ground contact！
• Make sure that socket must be grounded
(protective ground contact) before use.
• When working wear personal safety guards to avoid the
risk from:
- Splashing and evaporation of liquids
- Release of toxic or combustible gases
• Set up the instrument in a spacious are on a stable, clean,
non-slip, dry and fireproof surface. Do not operate the
instrument in explosive atmospheres, with hazardous
substances or under water.
• Gradually increase the speed, reduce the speed if:
- Stirring bar breaks away due to high speed
- The instrument is not running smoothly, or container
moves on the base plate
• Temperature must always be set to at least 50℃ lower
than the fire point of the media used.
• Be aware of hazards due to:
- Flammable materials or media with a low boiling
temperature
- Overfilling of media
- Unsafe container
• Process pathogenic materials only in closed vessels.
• Check the instrument and accessories prior to each use.
Do not use damaged components. Safe operation is only
guaranteed with the accessories described in the
“Accessories” chapter. Accessories must be securely
attached to the device and can not come off by themselves.
Always disconnect the plug before fitting accessories.
• When the external temperature sensor needed, the tip of
the measuring sensor must be at least 5-10mm from vessel
bottom and wall.
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7” Square Hotplate Magnetic Stirrer
• The instrument can only be disconnected from the main
power supply by pulling out the main or the connector plug.
• The voltage stated on the label must correspond to the
main power supply.
• Ensure that the main power supply cable does not touch
the hotplate. Do not cover the device.
• Forbid to put pressure and over heat media on the surface
of glass ceramic that can be caused surface broken.
• The instrument may only be opened by experts.
• Keep away from high magnetic field.
2. Proper use
The instrument is designed for mixing and/or heating
liquids in schools, laboratories or factories.
• Observe the minimum distances between the devices,
between the device and the wall and above the assembly
(min. 100 mm)
>100mm
>100mm
Figure 1
This device is not suitable for using in residential areas or
other constraints mentioned in Chapter 1.
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7” Square Hotplate Magnetic Stirrer
3. Inspection
3.1 Receiving Inspection
Unpack the equipment carefully and check for any damages
which may have arisen during transport. Please contact
manufacturer/supplier for technical support.
Note:
If there is any apparent damage to the system,
please 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
User Manual
1
Table 1
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7” Square Hotplate Magnetic Stirrer
4. Control
4.1 Control elements
Temperature Control Knob
(Hotplate model)
Speed Control Knob
LCD Display
LED Heat
(Hotplate model)
LED Stir
Figure 2 LCD digital model
Temperature Control Knob
(Hotplate model)
Speed Control Knob
LED Display
(Hotplate model)
LED Heat
(Hotplate model)
LED Stir
Figure 3 LED digital model
Power Switch
Figure 4
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7” Square Hotplate Magnetic Stirrer
Items
Descriptions
LCD digital
model
Speed control knob Stir
Set the rated rotary speed. The stirring function is switched ON or OFF by
pushing the knob.
Temperature control knob
Heat (Hotplate)
Set the rated temperature. The heating function is switched ON or OFF by
pushing the knob.
LCD Display
LCD displays the real working state and all settings.
LED Heat (Hotplate)
When the heating function is switched ON, the LED Heat is lit.
LED Stir
When the stirring function is switched ON, the LED Stir is lit.
Power Switch
Switch ON or OFF the instrument.
LED digital
model
Speed control knob Stir
The stirring function is switched ON or OFF by rotating the knob.
Temperature control knob
Heat (Hotplate)
The heating function is switched ON or OFF by rotating the knob.
LED Display (Hotplate)
If rotate the heating knob, LED displays the temperature setting value and
shift to real value in the duration of 5 seconds.
LED Heat (Hotplate)
When the heating function is switched ON, the LED Heat is lit.
LED Stir
When the instrument is switched ON, the LED Stir is lit.
Power Switch
Switch ON or OFF the instrument.
Table 2
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7” Square Hotplate Magnetic Stirrer
4.2 Display
Temp Stir
℃
Remote Probe Hot
Err
Real value
Rated value
Temperature
( Hotplate model)
Stir
Error
Hotplate waning
(Hotplate model)
External probe
( Hotplate model )
Remote control
Figure 5 LCD digital model
Characters
Descriptions
Temp and °C
Display temperature when the heating
function is switched ON.
Stir
Display stirring state when the stirring
function is switched ON.
Hot
Display hot warning if the heating plate
temperature is above 50°C after
switching OFF the heating function.
Probe
Display when using external probe.
Remote
Display in case of remote control.
Err
Display in case of error happening.
Rated value/Real
value
Display value in case of heating or
stirring function switching ON.
Note：
If both heating and stirring functions have been
started at the same time, heating function always
has higher priority. If in this case speed is
changed via the stirring knob, it displays stirring
speed and reverses to temperature in the duration
of 5 seconds.
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7” Square Hotplate Magnetic Stirrer
Display area
Figure 6 LED digital hotplate model
Display
Descriptions
Display
area
When heating function was switched ON, LED
displays the temperature setting value and shifts
to real value in 5 seconds.
When the heating function is switched OFF and
the hotplate temperature is still above 50℃,
LED displays HOT, otherwise LED displays 0.
5. Trial run
• Make sure the required operating voltage and power
supply voltage match.
• Ensure the socket must be properly grounded.
• Plug in the power cable，ensure the power is on and begin
initializing.
• Add the medium into the vessel with an appropriate
stirring bar.
• Place vessel on the work plate.
• Set the target stirring speed and begin.
• Set the target temperature and start heating (hotplate
model).
• Stop the heating and stirring functions.
If these operations above are normal, the device is ready to
operate. If these operations are not normal, the device may
be damaged during transportation, please contact
manufacturer/supplier for technical support.
Warning !
Forbid to transfer the vessel when the instrument
working.
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7” Square Hotplate Magnetic Stirrer
6. Working with external
temperature sensor (Hotplate
Model)
Figure 7
6.1 LCD digital hotplate model
The external temperature sensor PT1000 is manufacture’s
standard accessory. If the sensor is plugged in, “Probe” will
be shown on the LCD digital display to indicate the sensor
is operating. The setting value of external temperature
sensor and actual temperature are displayed. Safe circuit
controls hotplate temperature. Comparing with the
temperature control of the hotplate, the external
temperature sensor can control the medium’s temperature
more precise. The heating function will be stopped
automatically under abnormal conditions. Please operate
follow the instructions below:
• Switch OFF the instrument.
• Ensure the external temperature sensor is inserted in
the media heated.
• Switch ON the instrument and run heating function.
If the heating function does not work, please contact
manufacturer/supplier for technical support.
6.2 LED digital hotplate model
The external temperature sensor PT1000 is the
manufacture’s standard accessory. If the sensor is plugged
in and rotate the heating knob, LED displays the
temperature setting value and shifts to real value in 5
seconds. Safe circuit controls hotplate temperature.
Comparing with the temperature control of the hotplate, the
external temperature sensor can control the medium’s
temperature more precise. The heating function will be
stopped automatically under abnormal conditions. Please
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7” Square Hotplate Magnetic Stirrer
operate follow the instructions below:
• Switch OFF the instrument.
• Ensure the external temperature sensor is inserted in
the media heated.
• Switch ON the instrument and run heating function.
If the heating function does not work, please contact
manufacturer/supplier for technical support.
7. Residual heat warning（HOT）
In order to prevent the risk of burns from the hotplate,
digital hotplate model 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 to
warn that there is a hazard of burns from the hotplate. When
the hotplate temperature drops to below 50°C, the unit will
automatically switch off. If users want to turn off the LCD
or LED screen immediately, just pull out the plug directly.
When the power OFF, the residual heat warning function
cannot be run.
8. Remote Control (LCD Digital
model)
Figure 8
The unit can be controlled from an external PC (using the
dedicated software) via the RS232C serial interface fitted to
the unit. Data communication from laboratory instrument to
computer is only possible on demand of the computer.
• The functions of the interface lines between laboratory
instrument and automation system are selected from
the specified signals of the EIA-standard RS232C,
corresponding with DIN66020 Part 1. The allotment of
the bushing can be taken from Figure 8.
• Transmission method: Asynchronous signal
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7” Square Hotplate Magnetic Stirrer
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
• Start remote control knob, LCD displays “ Remote ”.
Note:
Forbid to insert or remove the RS232C
communication line when switch ON!
9. Faults
• Instruments can’t be power ON
- Check whether the power line is unplugged
- Check whether the fuse is broken or loose
• Fault in power ON self test
- Switch OFF the unit, then switch ON and reset the
instruments to factory default setting.
• Stir speed cannot reach set point
- Excessive medium viscosity may cause abnormal
speed reduction of the motor
• Unit cannot be powered OFF when switched OFF.
- Check if the residual heat warning function is still ON
and hotplate temperature is above 50 ℃ (the
LCD/LED screen still work and “Hot” flash).
If these faults are not resolved, please contact
manufacturer/supplier.
10. Maintenance and Cleaning
• Proper maintenance can keep instruments working
properly and lengthen its lifetime.
• Do not spray cleanser into the instrument when
cleaning.
• Unplug the power line when cleaning.
• Only use recommended cleansers:
Dyes
Isopropyl alcohol
Construction materials
Water containing tenside /
Isopropyl alcohol
Cosmetics
Water containing tenside /
Isopropyl alcohol
Foodstuffs
Water containing tenside
Fuels
Water containing tenside
• Wear the proper protective gloves during cleaning of
the instrument.
• Before using other method for cleaning or
decontamination, the user must ascertain with the
manufacturer that this method will not harm the
instrument.
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7” Square Hotplate Magnetic Stirrer
• Send in the case of service the instrument back in the
packaging carton. Storage packing is not sufficient for
the back dispatch. Use additionally a suitable
transportation packing.
• The enamel makes the hotplate easier to care for and
more resistant to acids and bases. Because of it,
however, the hotplate is also more susceptible to
extreme fluctuations in temperature and the force of
impact. This can result in cracks forming or the
coating flaking off.
Warning！
Power OFF when maintenance and cleaning.
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: 89/336/EWG
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 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.
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7” Square Hotplate Magnetic Stirrer
12. Specifications
Items
Specifications
LCD digital model
LED digital model
Voltage [VAC]
100-120/200-240
Frequency [Hz]
50/60
Power [W]
*1050/50
*1030/30
Stirring point position quantity
1
1
Max. stirring quantity (H2O) [l]
20
10
Max. magnetic bar [L×Ø, mm]
80×10
Motor type
DC brushless motor
Shaded pole motor
Max. power input of motor [W]
18
15
Max. power output of motor [W]
10
1.5
Speed range [rpm]
100-1500
0-1500
Rotary speed display
LCD
Scale
Plate material
Glass ceramic
Dimensions of workplate (mm)
184×184
*Heating power [W]
1000
*Temperature range [°C]
RT-550, increment: 1
RT-550, increment: 5
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7” Square Hotplate Magnetic Stirrer
*Temperature display [°C]
LCD
LED
*Temperature display accuracy [°C]
±0.1
±1
*Control accuracy of heating temperature [°C]
±1(100℃ below)
±1%(100℃ above)
±10
*The safety temperature of the hotplate [℃]
580
*Temperature sensor in medium
PT1000
*Control accuracy of heating
temperature with temperature
sensor [℃]
±0.2
±0.5
*Residual heat warning
50℃
Dimensions (mm)
215×360×112
Weight [kg]
*5.3
4.6
*4.5
3.8
Permitted ambient temperature [°C]
5-40
Permitted relative humidity
80%
Protection class acc. to DIN 60529
IP21
RS232 interface
Yes
No
*Hotplate model
Table 3
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7” Square Hotplate Magnetic Stirrer
13. Ordering information
Cat No.
Descriptions
813223007777
MS7-H550-Pro LCD Digital 7’’ Square
Hotplate Magnetic Stirrer, glass ceramic
hotplate, USA plug, 110V/50Hz/60Hz
813223017777
MS7-H550-Pro LCD Digital 7’’ Square
Hotplate Magnetic Stirrer, glass ceramic
hotplate, Cn plug, 220V/50Hz/60Hz
813223027777
MS7-H550-Pro LCD Digital 7’’ Square
Hotplate Magnetic Stirrer, glass ceramic
hotplate, Euro plug, 220V/50Hz/60Hz
813223037777
MS7-H550-Pro LCD Digital 7’’ Square
Hotplate Magnetic Stirrer, glass ceramic
hotplate, UK plug, 220V/50Hz/60Hz
813213007777
MS7-Pro LCD Digital 7’’ Square Plate
Magnetic Stirrer, glass ceramic plate,
USA plug, 110V/50Hz/60Hz
813213017777
MS7-Pro LCD Digital 7’’ Square Plate
Magnetic Stirrer, glass ceramic plate, Cn
plug, 220V/50Hz/60Hz
813213027777
MS7-Pro LCD Digital 7’’ Square Plate
Magnetic Stirrer, glass ceramic plate,
Euro plug, 220V/50Hz/60Hz
813213037777
MS7-Pro LCD Digital 7’’ Square Plate
Magnetic Stirrer, glass ceramic plate, UK
plug, 220V/50Hz/60Hz
813221007777
MS7-H550-S LED Digital 7’’ Square
Hotplate Magnetic Stirrer, glass ceramic
hotplate, USA plug, 110V/50Hz/60Hz
813221017777
MS7-H550-S LED Digital 7’’ Square
Hotplate Magnetic Stirrer, glass ceramic
hotplate, Cn plug, 220V/50Hz/60Hz
813221027777
MS7-H550-S LED Digital 7’’ Square
Hotplate Magnetic Stirrer, glass ceramic
hotplate, Euro plug, 220V/50Hz/60Hz
813221037777
MS7-H550-S LED Digital 7’’ Square
Hotplate Magnetic Stirrer, glass ceramic
hotplate, UK plug, 220V/50Hz/60Hz
813211007777
MS7-S Classic 7’’ Square Plate Magnetic
Stirrer, glass ceramic plate, USA plug,
110V/50Hz/60Hz
813211017777
MS7-S Classic 7’’ Square Plate Magnetic
Stirrer, glass ceramic plate, Cn plug,
220V/50Hz/60Hz
813211027777
MS7-S Classic 7’’ Square Plate Magnetic
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7” Square Hotplate Magnetic Stirrer
Stirrer, glass ceramic plate, Euro plug,
220V/50Hz/60Hz
813211037777
MS7-S Classic 7’’ Square Plate Magnetic
Stirrer, glass ceramic plate, UK plug,
220V/50Hz/60Hz
Accessories
18900016
PT1000-A Temperature sensor for digital
hotplate model, length of 230mm
18900136
PT1000-B Glass coated temperature
sensor for digital hotplate model, length
of 230mm
18900017
Support clamp of PT1000
18900002
MS135.2 Red quarter pie, 11 holes, 4 ml
reaction vessel, Ø15.2mm, 20mm depth
18900003
MS135.3 Purple quarter pie, 4 holes, 20
ml reaction vessel, Ø28mm, 24mm depth
18900004
MS135.4 Blue quarter pie, 4 holes,30 ml
reaction vessel, Ø28mm, 30mm depth
18900005
MS135.5 Black quarter pie, 4 holes,40 ml
reaction vessel, Ø28mm, 43mm depth
18900048
MS135.6 Green quarter pie, 6 holes, 8ml
reaction vessel, Ø17.75mm, 26mm
depth
18900049
MS135.7 Golden quarter pie, 4 holes，
16ml reaction vessel, Ø21.6mm, 31.7mm
depth
Table 4
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2311 E. Locust Court, Ontario, CA 91761 United States.
Office: +1-747-230-5179
Fax: +1-909-230-5275
Sales contact: info@dlabsci.com
Service contact: service@dlabsci.com
www.dlabsci.com
DLAB Scientific Instrument Inc.
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