BioLAB BHMS-104 User manual

Operation Manual
HotPlate Magnetic Stirrer
BHMS-104
Thank you very much for Choosing Biolab products. Please read the“Operating Instructions” and “Warranty”
before operating this unit to assure proper operation.

www.biolabscientific.com
HotPlate Magnetic Stirrer BHMS-104
2
Index
1. Safety Instruction and Installation............................................................................................03
2. User Instruction................................................................................................................................06
3. Troubleshooting and Maintenance..........................................................................................13
4. Warranty.............................................................................................................................................14

HotPlate Magnetic Stirrer BHMS-104
www.biolabscientific.com 3
01Safety Instructions and Installation
1.1 Safety Instructions
Warning!
Read the operating instructions carefully before use.
• Ensure that only trained sta works with the instrument.
Risk of burn!
• Caution when touch the housing parts and the hotplate which can
reach temperature of 340°C.
• Pay attention to the residual heat after switching o.
Protective ground contact!
• Make sure that the electrical socket is grounded (protective ground
contact) before use.
a. When operating wear personal safety protection to avoid the risk from:
- Splashing and evaporation of liquids
- Release of toxic or combustible gases
b. Use the instrument in a spacious area on a stable, clean, non-slip, dry and reproof surface. Do not
operate the instrument in explosive atmospheres, with hazardous substances or around water.
c. Gradually increase the speed, reduce the speed if:
- Stirring bar breaks away due to high speed
- The instrument is not running smoothly, or the container is not centered on the plate.
d. Temperature must always be set to at least 50°C lower than the ash point of the media used.
e. Be aware of hazards due to:
- Flammable materials or media with a low boiling temperature
- Overlling of media
- Unsafe container
f. Process pathogenic materials only in closed vessels.

www.biolabscientific.com
HotPlate Magnetic Stirrer BHMS-104
4
g. If the case of the stirrer bar is PTFE, please note:
- Elemental uorine, three uoride and alkali metals will corrode the PTFE and Halogen alkalies make
it expand at room temperature
- Molten alkali, alkaline earth metals or their solution, as well as the powder in second and third
ethnic of the Periodic Table of Elements will have chemical reaction with PTFE when temperature
reaches 300 ~ 400°C.
h. Check the instrument and accessories prior to each use. Do not use damaged components. Safe
operation is only guaranteed with the accessories listed in the “Accessories” section. Accessories
must be securely attached to the device and must be removed when not in use. Always disconnect
the power before tting accessories.
i. When using the external temperature sensor, the tip of the measuring sensor must be at least
5-10mm from vessel’s bottom and wall.
j. The instrument can only be fully disconnected from the main power supply by turning o the main
or disconnecting the plug.
k. The voltage stated on the label must correspond to the main power supply.
l. Ensure that the main power supply cable does not touch the hotplate. Do not cover the device.
m. The instrument must only be operated by adults.
n. Keep away from high magnetic elds.
1.2 Proper Use
The instrument is designed for mixing and/or heating liquids in laboratories:
• Do not use more than 2000 meters above sea level
Temperature between 0°C and 40°C
• Installation Type: Product is designed to connect the indoor outlet, where voltage uctuation is
not more than ±10% compared with normal.
• Observe the minimum distances between multiple units, and distances to the rear wall and above
the assembly (min. 100 mm).

HotPlate Magnetic Stirrer BHMS-104
www.biolabscientific.com 5
Picture 1
This device is not suitable for using in residential areas or other constraints mentioned in 1.1.
1.3 Inspection
1.3.1 Receiving Inspection
Unpack the equipment carefully and check for any damage which may have arisen during transport.
Please contact manufacturer/supplier for technical support.
Note: If there is any apparent damage to the unit, do not attempt to operate.
1.3.2 Listing of Items
Item Quantity
Main unit 1
Power cable 1
Stirrer bar 1
User manual 1

www.biolabscientific.com
HotPlate Magnetic Stirrer BHMS-104
6
02User Instruction
2.1 Functions
2.1.1 Technical Parameters
Capacity 20 L
Stirring Positions 1
Speed Range 100-1500 rpm
Temperature RT-340°C
Permissible Ambient Temperature 5-40°C
Temperature Increment 1°C
Control Accuracy of Work Plate ±1(<100°C), ±1%(>100°C)
Temperature Accuracy ±0.1°C
Safety Temperature 360°C
Control Accuracy with Sensor PT1000 ±0.2°C
Permissible Relative Humidity 0.8
Heating Warning 50°C
Timing Range 1 min to 99h 59min
Motor rating Input [W] 18
Motor rating output [W] 10
Heating Output 500 W
Work Plate Size 135 mm
Stirrer Dimension 80 mm
Platform Material Stainless steel with ceramic coating
Speed Display LCD
Speed Display Resolution ±1 rpm
Temperature Display LCD
Remote Control (RS232 interface) Yes
Motor Type Brushless DC motor
Protection Class IP42
Overall Dimension 160Wx280Dx85H mm
Weight 2.8 kg
Power 550 W
Power Supply 100-120V/200-240V, 50/60Hz

HotPlate Magnetic Stirrer BHMS-104
www.biolabscientific.com 7
2.1.2 Control
Picture 2
Picture 3

www.biolabscientific.com
HotPlate Magnetic Stirrer BHMS-104
8
LCD digital
Hotplate
Timer
Magnetic
Stirrer
Items Descriptions
Function switch knob
Turning the knob, switches the parameters setting
interface, followed by Temperature setting, Speed
setting, Timer setting, switching cycle. Pressing the
knob turns the three setting options on/o.
Parameter setting knob
At the parameter setting interface, set the
parameter by turning the knob. Pressing the knob
turns on the initializer.
LCD display LCD displays the real-time working state and all
settings.
Heating knob Heat When the heating function is switched ON, the LED
Heat is lit.
Stirring knob Stir When the stirring function is switched ON, the LED
Stir is lit.
Timer knob timer When the timer function is switched ON, the LED
Timer is lit.
Power switch Switch ON or OFF.
2.1.3 Display
Picture 4

HotPlate Magnetic Stirrer BHMS-104
www.biolabscientific.com 9
Characters Descriptions
Temp & °C Displays temperature when the heating function is switched
ON.
Stir Displays stirring speed when the stirring function is switched
ON.
Hot Displays HOT warning if the plate temperature is above 50°C
after switching OFF the heating function.
Timer Timer parameter when the timer function is switched ON.
Probe Display when using external probe.
Remote Display when using remote control.
Rated value/Real value Display values in when heating or stirring or timer function is
switched ON.
Note: If both heating and stirring functions have been started at the same time, heat display always
has higher priority. If in this case speed is changed via the stirring knob, it displays stirring speed and
reverts to temperature after 5 seconds.
2.2 Trial Running
Make sure the required operated voltage and power supply voltage match.
Ensure the socket is 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.
Observe the stirring bar and LCD display.
Set the target temperature and start heating.
Observe the real temperature on LCD display.
Set the timer.
Timer ends, the heating function stops.
Stops stirrer function.
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.

www.biolabscientific.com
HotPlate Magnetic Stirrer BHMS-104
10
Warning !
Do not remove the vessel when the instrument is operating.
2.3 Function
2.3.1 Heating
The device is controlled by digital temperature control technology, which has two separate safety
circuits. The hotplate is kept at a constant temperature by a digital control circuit. The hotplate
temperature can also be controlled from a separate, adjustable safety circuit. The two temperature
sensors (PT1000) internal for temperature control are built into the hotplate. The single external
PT1000 can control the temperature of sample.
• Plug in the external PT1000.
• Set the temperature via rotating the temperature control knob slowly to the target value, press
parameter set knob and switch on the heating function.
• When the heating function is switched on, the LED “Heat” will light up and the LCD will display
the actual temperature.
• The set temperature will be displayed on the right-hand side of the LCD as well as Temp and °C
characters.
• The heating function is switched on or o by pushing heating knob.
Instrument is turned on for the setting zone temperature setting when the last shutdown temperature,
the common case, set the heating temperature display the actual temperature may have the following
dierences:
- Hotplate center and outer edge.
- The sample container and the container.
In order to ensure the accuracy of the liquid temperature inside the container, please use the PT1000
external temperature sensor.

HotPlate Magnetic Stirrer BHMS-104
www.biolabscientific.com 11
1) Working with the PT1000 external temperature sensor
Picture 5
The PT1000 external temperature sensor is the manufacturer’s optional accessory. If the sensor is
plugged in, “Probe” will be shown on the digital display to indicate the sensor is operating. The
setting value of external temperature sensors and actual temperature are displayed. The safety circuit
controls hotplate temperature.
Comparing with the temperature control of the hotplate, the external temperature sensor can control
the medium’s temperature more precisely. The external temperature sensor must be put in sample
container, if detect anomalies, heating will automatically shut down. Please do the following at this
time:
• Turn o the power
• Ensure the external temperature sensor is positioned sample container correctly
• Turn on the power, set the target temperature and switch on the heating function
• If the unit is still not functioning correctly, please contact manufacturer/supplier
2) Residual heat warning (HOT)
In order to help prevent the risk of burns from the hotplate, this instrument has a residual heat
warning function. When the heating function is switched o (and the power cord is still plugged
in) and the heating plate temperature is still above 50°C, “Hot” will ash to warn that it is unsafe to
touch.. When the hotplate temperature drops to below 50°C, the display will automatically switch
o. To completely turn o the unit, pull out the plug. When the plug is pulled out, the residual heat
warning function will not function.

www.biolabscientific.com
HotPlate Magnetic Stirrer BHMS-104
12
2.3.2 Stirring
The “stirring” function is switched on or o via rotating stirring knob. The speed is set on the knob
(100 to 1500 rpm in steps of 10 rpm). When both the heating function and stirring are switched on
and the above operations are completed, the LCD will shift to the speed value and revert back to the
temperature value in about 5 seconds.
The last speed value set is displayed.
2.3.3 Timer
Turn the Function switch knob to time set interface, turn the parameter set knob to target time, press
parameter set knob, to switch on timer function.
Attention: The heating and stirring function can be switched on at the same time only when
setting the timer function. Otherwise, only the stirring function can be switched on.
2.3.4 Remote Control
Picture 6
The unit can be controlled from an external PC (using the third-party software) via the RS232C serial
interface tted 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 specied signals of the EIA-standard RS232C, corresponding with DIN66020 Part 1.
The allotment of the bushing can be taken from Picture 6.
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.
Note: Forbid to insert or remove the RS232C communication line when switch on!

HotPlate Magnetic Stirrer BHMS-104
www.biolabscientific.com 13
03Troubleshooting and Maintenance
3.1 Faults
1) Instruments can’t be powered ON
Check whether the power line is unplugged
Check whether the fuse is broken or loose
2) Fault in power during self-test
Switch OFF the unit, then switch ON and reset the instruments to factory default setting.
3) Stir speed cannot reach set point
Excessive medium viscosity may cause abnormal speed reduction of the motor
4) Unit cannot be powered o when switched o.
Check if the residual heat warning function is still ON and hotplate temperature is above 50℃ (the
LCD still work and “Hot” ash).
If these faults are not resolved, please contact us.
3.2 Maintenance and Cleaning
Please keep the instrument dry and clean, quickly remove and overowing liquid, use non-abrasive
cleaner to clean up the outer surface, please do not connect with the power supply if wet. If wet solids
or liquid enter into the instrument, please disconnect the power supply and do not use, contact the
supplier for more advice.
Do not use a spray cleanser on the instrument when cleaning.
Unplug the power cord when cleaning.
Only use recommended cleansers:
Dyes Isopropyl alcohol
Construction materials Water containing surfactant / Isopropyl
alcohol
Cosmetics Water containing surfactant / Isopropyl
alcohol
Foodstus Water containing surfactant
Fuels Water containing surfactant

www.biolabscientific.com
HotPlate Magnetic Stirrer BHMS-104
14
Before using other method for cleaning or decontamination, the user must ascertain with the
manufacturer that this method will not harm the instrument. Wear the proper protective gloves
during cleaning of the instrument.
Note:
a. Electronic equipment cannot cleaned with a detergent cleaner
b. Repairing equipment must be cleaned and avoid the contamination of dangerous substances, put
the equipment into original package box and returned.
c. When the equipment hasn’t been used for long time, please leave it in power-o condition at dry,
clean, room temperature, stable environment.
04Warranty
1) Warranty is 12 months from EX-factory date (excluding consumable accessories).
2) We will take no responsibility for risks caused by improper operation and man-made damages.
3) After the expiration of warranty, our company is also responsible for repairs, but the corresponding
maintenance cost should be charged.
4) We can provide equipment drawings and necessary technical data for maintenance companies or
personnel trained by our company.

BIOLAB SCIENTIFIC LIMITED
3660 Midland Avenue, Suite 300, Toronto, Ontario M1V 0B8,
Canada
[phone] info@biolabscientic.com www.biolabscientic.com