The biochemical incubator is suitable for scientific research, colleges and production departments such as environmental protection, sanitation and epidemic prevention, drug testing, agriculture, livestock and aquatic products. It is a special constant temperature equipment for water body analysis and BOD measurement, bacteria, mold, microbial culture, preservation, plant cultivation, and breeding experiments. It is an important test equipment for scientific research institutions, universities, production units or department laboratories in the fields of biology, genetic engineering, medicine, health and epidemic prevention, environmental protection, agriculture, forestry, animal husbandry, etc. Volume: 150 liters, 250 liters Temperature range: 5 ～ 50 deg.] C temperature uniformity: ≤ ± 1 ℃ temperature fluctuation: ≤ ± 1 ℃ stainless steel, spray steel shell, polyurethane foam insulation has a large viewing angle observation windows, lights microcomputer control, high precision digital display. Unique stainless steel circulation duct, forced air circulation, uniform temperature.
Scope of use
Biochemical incubators are widely used in environmental protection, sanitation and epidemic prevention, drug testing, agricultural and livestock, aquatic products research, colleges, production departments, water body analysis and BOD determination, bacteria, mold, microbial culture, preservation, plant cultivation, breeding experiments Special thermostats.
Features
1 It adopts high-quality mirror stainless steel inner tank. The box body is sprayed with high-quality steel plate, four corners and half arc, easy to clean, and the spacing of the partitions inside the box is adjustable.
2 Screen LCD display, multiple sets of data on one screen, easy to understand, easy to observe and operate. The operation is simple and the temperature control accuracy is higher than the original digital meter.
3 Equipped with the most advanced fuzzy PID intelligent temperature controller in the world, with small fluctuation and timing function (0-9999min)
3 With independent temperature limit alarm system, it will automatically interrupt when the temperature exceeds the limit, ensuring safe operation of the experiment without accidents.
4 With 4 ~ 20mA standard current signal, RS485 interface can be connected to the recorder and computer, can record the change of temperature parameters.
5 unique stainless steel circulation duct, forced air circulation, uniform temperature.
6. The outer casing is made of cold-rolled steel plate, the surface is electrostatically sprayed, the inner mirror is stainless steel, and the partition can be adjusted arbitrarily;
7. The temperature control system adopts microcomputer single-chip technology, and the temperature control precision is high;
8. With temperature, time adjustment control, touch mode keyboard setting adjustment;
9. Displayed as dual-screen high-brightness digital tube display, the indication value is accurate and intuitive, and the performance is superior;
10. With timing and timing functions;
11. The working room is equipped with lighting device, and the large viewing angle is insulated with vacuum tempered glass for easy observation;
12. Parameter memory and call recovery function with data loss due to power failure and crash.
Circuit working principle
The temperature sensor circuit uses a new temperature sensor integrated circuit IC1. The voltage comparator circuit is composed of resistors R1-R7, temperature setting potentiometers RP1, R-tooth and voltage comparator integrated circuits IC2 (N1, N2). The control execution circuit is composed of transistors V1, V2, relays K1, K2, and diodes VD1, VD2, and the like. The biochemical incubator can be restructured with an old single or double door refrigerator: use the function of the refrigerator itself to cool, install heating devices (such as electric heating wire or 150W iodine tungsten lamp) and exhaust fan under the inside of the refrigerator (can make the temperature inside the box) Evenly). Potentiometer RPl is used to set the upper limit of temperature, and RP2 is used to set the lower limit of temperature. The relay K1 controls the heating device by heating the intermediate relay (shown in the circuit), and the relay KZ controls the refrigeration system of the refrigerator through the refrigeration intermediate relay (drawn at the end of the circuit). Pins 5 and 2 of IC2 are connected to the center plugs of RP1 and RP2 respectively. Pins 6 and 3 of IC2 are connected to the output of ICI through resistor R3. When the voltage value of pin 2 of IC2 minus the voltage value of pin 5 is approximately equal to 0·OlV, the corresponding temperature is 1 °C. When the temperature in the biochemical incubator is within the set temperature range, the voltage at pin 2 of IC2 is higher than the voltage at pin 5, and the voltage at pin 3 and pin 6 is equal to the voltage at pin 2 (or lower than pin voltage at 2 feet). Voltage), 1 pin and 7 pin output low level, VI and V2 are cut off, relay Kl, K2 are not sucked, cooling and heating circuits are not working.
When the temperature inside the box exceeds the upper limit of the set temperature, the voltage of pin 3 and pin 6 of IC2 will be higher than the voltage of pin 2 and pin 5, and pin 1 of IC2 changes from low level to high level, so that V2 is turned on. The relay K2 is pulled in, its normally open contact is closed, and the refrigeration system works. When the temperature inside the box is lower than the lower limit of the set temperature, the voltage of pin 3 and pin 6 of IC2 is lower than the voltage of pin 2 and pin 5, and the pin 7 of IC2 changes from low level to high level, then Vl is turned on. The relay K1 is pulled in, its normally open contact is turned on, and the heating circuit works. The components and parts choose Rl-R5 to select 1/4W metal membrane resistor, the accuracy should be 1%; R6-R9 can choose 1/4W carbon membrane resistor. Both RPl and RP2 use a wire wound potentiometer with higher precision. C uses monolithic capacitors. Both VDl and VD2 use the 1N4148 silicon switching diode. Vl and V2 select S9013 or C8050 type silicon NPN transistor. ICl selects LM35DZ or LM36, TMP36 type temperature sensor integrated circuit; IC2 selects LM393 operational amplifier integrated circuit. Kl and K2 both use l2V DC relay
Precautions for use
1. Do not put flammable and volatile chemicals into the box.
2. If abnormality, odor, smoke, etc. occur during use, please turn off the power immediately. Users should not blindly repair it. They should inform the repair department of the company and check it out by professionals.
3. The wall of the tank wall and the surface of the equipment should be wiped frequently to keep it clean and increase the transparency of the glass. Do not use acid, alkali or other corrosive solutions to wipe the outer surface.
4. When the equipment is not in use, it should be treated with moisture. The specific method is as follows:
Pour the water from the bottom of the tank to the water tray, set the temperature to 42 ° C, run for 5 hours, and open the door every two hours to release the moisture. After the treatment is finished, unplug the power plug and store it.
5. If the device is not used for a long time, unplug the power cord to prevent the device from damaging the person. It should be operated regularly (usually in the first quarter) for 2-3 days according to the conditions of use to remove moisture from the electrical parts and avoid damage to the relevant components.
Usage overview
Applicable to environmental protection, health and epidemic prevention, drug testing, agriculture, livestock, aquatic products and other scientific research, colleges and production departments. It is a special thermostat for water body analysis and BOD measurement, cultivation, preservation, plant cultivation and breeding experiments of bacteria, molds and microorganisms.
Edit this paragraph product features
1. Micro-computer temperature controller with timing function keys, accurate and reliable temperature control;
2. The mirror stainless steel inner tank is adopted, the semi-circular arc angle is easy to clean, and the spacing of the shelf in the box is adjustable;
3. Using a glass observation window, the observation is convenient and clear;
5. With independent temperature limit alarm system, it will automatically interrupt when the temperature exceeds the limit, ensuring safe operation of the experiment without accidents; (optional)
Precautions for use
1. Do not put flammable and volatile chemicals into the box.
2. If abnormality, odor, smoke, etc. occur during use, please turn off the power immediately. Users should not blindly repair it. They should inform the repair department of the company and check it out by professionals.
3. The wall of the tank wall and the surface of the equipment should be wiped frequently to keep it clean and increase the transparency of the glass. Do not use acid, alkali or other corrosive solutions to wipe the outer surface.
4. When the equipment is not in use, it should be treated with moisture. The specific method is as follows:
Pour the water from the bottom of the tank to the water tray, set the temperature to 42 ° C, run for 5 hours, and open the door every two hours to release the moisture. After the treatment is finished, unplug the power plug and store it.
5. If the device is not used for a long time, unplug the power cord to prevent the device from damaging the person. It should be operated regularly (usually in the first quarter) for 2-3 days according to the conditions of use to remove moisture from the electrical parts and avoid damage to the relevant components.
Instructions
1. Open the box door, put the object to be processed into the shelf on the box, and close the box door.
2. Turn on the power, insert the three-pin plug into the power socket, and set the power switch on the panel to the “on†position. At this time, the meter displays a digital display indicating that the device is in working condition.
3. Set the temperature of the box you need by operating the temperature controller on the control panel.
When the set temperature is greater than the ambient temperature by 5 ° C or above, set the cooling transfer switch to "RT + 5 ° C". (For detailed operation instructions of the temperature controller, see the next page.)
4. The instrument starts to work, the temperature inside the box gradually reaches the set value, and after the required processing time, the processing is completed.
5. Turn off the power supply. After the temperature inside the box is close to the ambient temperature, open the door and take out the object.
Installation and commissioning
1. Be careful not to use force on the glass during transportation, and do not hit the cabinet. Inverting and tilting greater than 45° are prohibited.
2. After the equipment is grounded, it should be placed as stable as the ground is uneven.
3. Please do not use the instrument in direct sunlight or high temperature and humidity. The ambient temperature should be kept at 10-30 °C.
4. This equipment should be kept away from electromagnetic interference sources, and the grounding wire of the equipment should be effectively grounded.
5. When the equipment is in normal operation, the load placed in the box should not affect the air circulation to ensure the air circulation and temperature uniformity inside the box.
6, the power supply is AC 220V50HZ, must use 10A three-core socket, and has a reliable grounding wire, you must not use the two-core socket.
7, the power cord should not be close to the back, do not let the instrument or other items on the power line, so as not to damage the power cord
Folding editing notes in this paragraph
1. Install the biochemical incubator as much as possible in a place where the temperature and humidity change is small. Use a three-prong plug. The socket should be properly grounded.
2. Before starting the biochemical incubator, you should be familiar with and understand the instructions of each component and instrument, and master the correct use method.
3. It is strictly forbidden to contain volatile chemical solvents. Explosive gases and flammable gases are placed in the box. Do not use flammable sprays near the incubator to avoid spark ignition.
4, often check the gas path for air leakage.
5. The biochemical incubator has a power-off protection function, so it takes about one and a half minutes to start again after the compressor stops, so as to better protect the compressor.
6. The distance between the condenser and the wall of the biochemical incubator should be greater than 100mm, the side of the box should have a gap of 50mm, and the top of the box should have at least 300mm space to ensure good heat dissipation.
7. The biochemical incubator should avoid collision and shaking vibration during handling, maintenance and maintenance. The maximum inclination should be less than 45 degrees.
8. Turn off the main power supply and the power switch at the rear of the equipment when you stop using it for a long time. • At the same time, the biochemical incubator should avoid frequent door opening to keep the temperature stable while preventing dust and dirt from entering the work room.
9. The inside and outside of the box should be kept clean every day, and should be cleaned after each use. If you don't need it for a long time, you should always wipe the tank liner and equipment surface to keep it clean and increase the transparency of the glass. Do not use acid, alkali or other corrosive solutions to wipe the outer surface.
10. Turn off the power switch after the end of the culture. If the test sample is not taken out immediately, do not open the door.
11. The biochemical incubator should not be used under abnormal conditions such as high voltage, high current, strong magnetic field, etc., strictly in accordance with the electrical safety operation rules.
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