BioLAB BCLT-204 User manual

Operation Manual
Low Temperature Circulator
BCLT-204
BCLT-204
Thank you for Choosing Biolab products. Please read the “Operating Instructions” and
“Warranty” before operating this unit to assure proper operation.

Index
. APPLICATIONS ......................................................................................................................................03
2. SPECIFICATIONS....................................................................................................................................03
3.WORKING PRINCIPLE...........................................................................................................................04
4. GUIDELINES FOR USE AND OPERATION.....................................................................................05
5. MAINTENANCE...................................................................................................................................... 2
6. APPENDIX................................................................................................................................................. 3
Warning: The instrument can not provide the designed protection for operators who do
not follow the right procedures and requirements given by the manufacturer.
Warning: All solutions must be handled with care according to the lab’s safety regulation.
Please make a reference to the related material safety data sheet. Wear the lab-gown,
goggle and rubber gloves all the time. Be care of hot reagents.
Warning: Be aware of the risk of electric shock. Only the trained professionals are
permitted to open the face panel or back cover.
www.biolabscientific.com
2
Low Temperature Circulator BCLT-204

0 Applications
Refrigerated and Heating Circulator, thanks to its features such as highly precise and stable
temperature control and fast heating and cooling, has been widely used in precise and
thermostatic control equipment in sectors such as petroleum, physics, chemical industry,
pharmacy, and environmental protection. You may set its working temperature depending on
your needs. In addition, the circulator features various safety protection designs, reliable
performance and durability.
02 Specifications
Capacity : 6 L
Temperature Range : -20°C ~ 200°C
Temperature Stability : ±0.03°C
Ambient Temperature : -20 ~70°C
Pump Flow Rate : 0L/min
Pump Capacity Pressure : 0.35 bar
Top Opening 60Lx 60W mm
Inner Dimension (WxDxH) : 320Lx 80Wx 50H mm
Outer Dimension (WxDxH) : 400Lx250Wx65HH mm
Weight : 25 kg
Control : PID
Display : 0. °C
Temperature Sensor : PT 00
Refrigerant : R 34a
Refrigerating Power : 250 W
Heating Power: 2000 W
Power Supply : 220VAC± 0% 50Hz
www.biolabscientific.com
3
Low Temperature Circulator BCLT-204

03 Working Principle
. Principle block diagram
2. Principle
The circulator displays with a high-brightness LCD screen and measures temperature with a
high-precision sensor. It feedbacks the measured temperature to CPU in a real-time manner,
and then the fuzzy PID calculates a set of appropriate duty ratio to control heating equipment,
while the mixing device is constantly circulating water in the bath so that water temperature in
the bath becomes more even. All of these, along with the powerful refrigeration system,
accelerate realization of the required thermostatic status. With the imported compressor and
environment-friendly refrigerant R 34a, the refrigeration system reduces temperature to -
20 . This closed loop system maintains the bath temperature by ±0.03 promptly and ℃ ℃
effectively.
www.biolabscientific.com
4
Low Temperature Circulator BCLT-204

04 Guidelines for Use and Operation
. Component parts
Front View
. Heating circulation control 2. Bath cover 3. Refrigeration switch 4. Handle 5. Drain valve 6.
Radiator grid
www.biolabscientific.com
5
Low Temperature Circulator BCLT-204

Rear View
. Data output 2. Overcurrent breaker 3. Heating circulation control power supply 4. Water
outlet 5. Water inlet 6.Handle 7. Fuse 8. Power outlet 9. Radiation window 0. Power
Outlet
Display Panel
www.biolabscientific.com
6
Low Temperature Circulator BCLT-204

. Display area 2. Function button 3. Decrease button 4. Increase button 5. Return button
6. Power switch
2. Instructions for use
( ) Wire the power cord as in the rear view.
(2) When the external circulation is used for achieving constant
temperature, use a water tube to connect the instrument and the equipment requiring
constant temperature. Closing of internal circulation device of annular turbine is shown in Fig.
x.
(3) Prior to power-on, detect that fluid level is not lower than the turbine, otherwise an alarm
will give off. After the power cord is wired, turn on the power switch and the instrument
displays in the full screen. Automatically detect if the LCD is normal, and after 3 seconds,
automatically change over to the normal display mode. PV: current detection temperature: SV:
set temperature. Time: time for startup and operation of the instrument.
(4) Refrigeration: refrigeration is controlled manually in order to achieve more stable
thermostatic effects, and refrigeration must be turn on if the set temperature is 0 lower ℃
than the ambient temperature.
(5) Meaning of icons within the display screen: : heating; : pump operating; :
refrigerating; : over temperature alarm; : low water level; : operation.
3. Brief introductions to control operation
( ) Press the function button to display parameter SP, and press
the button again to store the current value and display the next
parameter. To return to the normal display interface, just press the return button .
(2) Press the increase button and the decrease button to change parameter values, and
press and hold for more than 3s to quickly increase or decrease.
(3) After the parameters are set, start the instrument, and press and hold the function button
for more than 3s so that the instrument is in the startup output. Now, the instrument
automatically adjusts output based on the settings so that the instrument is thermostatic
balanced. To stop output, press and hold the function button for more than 3s to stop the
instrument.
www.biolabscientific.com
Low Temperature Circulator BCLT-204

All parameters:
Parameter Function Setting range Default
value
Setting temperature -20.0～00.0℃20.0℃
Changing parameters
and password.
Changing subsequent
parameter is
allowed only when the
value is 8,
otherwise it returns to
the normal display
interface.
0～00.0 0
Superlow temperature
alarm. When the
actual temperature is
lower than AL,
buzzer alarms and the
instrument stops.
-20.0～02.0℃- 0.0℃
Superhigh
temperature alarm.
When the
actual temperature is
higher than AL,
buzzer alarms and the
instrument stops.
The instrument
becomes normal once
the
actual temperature is
lower than AL.
-20.0～02.0℃80.0℃
No applications
presently.
Correcting
temperature. When
- 0.0～0.0℃0.0℃
www.biolabscientific.com
8
Low Temperature Circulator BCLT-204

the
detected temperature
deviates from the
standard temperature,
it allows you to
increase or decrease
the error value on
this basis.
Water level alarm and
delay. When the
water level is lower
than a certain value,
the buzzer alarms and
timing starts. The
instrument stops
heating output once
the timing reaches
ATD value.
0～59min 0min
No applications
presently.
4. Preparations prior to use
( ) Care shall be taken so that no fluid overflows when it is injected into the bath. 20mm lower
than the water tank edge is recommended as the maximum fluid level. After the bath is filled
with fluid, replace the bath cover before starting and operating the instrument. During
operation, check fluid level from time to time to ensure the heating tube and pump
are always immersed in the fluid. (In case of high temperature
Experiment, insulated gloves must be worn for fear of scald). After the experiment is
completed, turn off the upper and lower power switches.
www.biolabscientific.com
9
Low Temperature Circulator BCLT-204

(2) If to change the fluid, hold the bottom of grid with your hands to remove the grid; and
fluid can be drained by unscrewing the drain plug with a straight screwdriver. After the fluid is
drained, tighten the plug.
(3) The circulator is used for both external circulation and internal circulation. If it is used for
internal circulation, plugs of water inlet and outlet must be tightened. If it is used for external
circulation, remove the plugs, connect the water inlet and outlet with a tube, and fix a
fastening throat hoop to ensure the tube ends are connected securely. Ensure fluid flows in
the tube smoothly during working, and the tube must be free from any bending. To improve
effects of experiment, an insulation bushing may be installed on surface of the tube. Regularly
check and promptly change the tube as it will age during its service.
(4)
(5) Pump flow may be adjusted as required by the user. Firstly, loosen
the screw with a Phillips screwdriver, secondly clamp the adjusting block
www.biolabscientific.com
10
Low Temperature Circulator BCLT-204

a flat-nose pliers and rotate the block to the desired position, and finally,
tighten the screw.
The diagram below shows functions of the block when it is in different
positions:
A— 00% internal circulation
B— 00% internal circulation
C—60% internal circulation and 40% external circulation
D—20% internal circulation and 80% external circulation
5.Precautions
( ) The power outlet must be provided with earthing conductor so that the instrument
housing is earthed for fear of accident.
(2) Ingress of any solution into the circulation control is prohibited to
prevent any damage to the instrument.
(3) It is prohibited from heating the bath without water to prevent the
heating tube from being burned.
(4) If the external circulation is not used, remove the water tube, and tighten the external
circulation water outlet screw for fear of ejection of fluid.
6. Troubles ooting
Commonly-occurring
trouble
Possible cause Solutions
No temperature rise No power in the external
power outlet
Connect with an external
power supply.
Overcurrent protection short
circuit
Check the circuit, and
replace the
overcurrent protector
www.biolabscientific.com
11
Low Temperature Circulator BCLT-204

Power switch short circuit Change the power
switch.
Electric heating tube short
circuit
Change the electric
heating tube.
Sensor fault Check and replace
the sensor.
Sensor fault
Continuous temperature
rise beyond control
Silicon controlled rectifier
short circuit in the
temperature regulator.
Check and replace the silicon
controlled rectifier.
No temperature lowering Refrigeration switch and fuse
open circuit, and sensor
fault.
Check and replace
the sensor,
refrigeration switch
and fuse.
Error appearing in the
display and buzzer alarm.
Sensor circuit break
05 Maintenance
This instrument is a precision measurement instrument. In order to ensure its accuracy and
prevent possible damage during use, we recommend you maintenance of the instrument as
follows:
( ) Water tank should be placed on a fixed platform, and the power supply connected with the
instrument should be 220V. The power outlet must be a three-hole receptacle, and earthing
conductor is required.
(2) Water must be injected only before the instrument is not powered on, and when the
instrument is being used, the water level must be higher than the stainless steel heater. Never
heat when no water exists or water level is lower than the heater. Otherwise heating tube will
be damaged.
(3) If the thermostatic control does not work properly, the control can work simply by cleaning
silver contacts on the control with a fine emery cloth.
(4) To inject water, water shall not flow into the control cabinet for fear of electric shock, and
after the instrument is used, drain water in the tank, and clean the tank to keep a clean tank,
thus improving service life.
www.biolabscientific.com
12
Low Temperature Circulator BCLT-204

(5) Purified water is preferable for fear of scale.
06 Appendix
One-year warranty starts from the purchase day (the
invoice-issuing date), and does not cover the following situations:
. The warranty has expired.
2. Any damage caused by the inappropriate operation.
3. Any damage caused by the disassembly that is not performed by authorized personnel.
4. Any damage caused by the inappropriate transportation or storage.
www.biolabscientific.com
13
Low Temperature Circulator BCLT-204

BIOLAB SCIENTIFIC LTD.
3660 Midland Avenue, Suite 300, Toronto, Ontario M V 0B8 Canada
Email: [email protected] Tel: + 707 533 445
Website: www.biolabscientific.com