How to use the new colony counter and precautions
Now with the advancement of science and technology, colony counting technology is increasingly perfect. Mainly reflected in the higher and higher configuration, more and more full-featured. The speed of counting is getting faster and faster and the accuracy is getting higher and higher. Therefore, prices have steadily increased.
In general, for a user who does not require high accuracy, a manual or semi-automatic colony counter may be considered. Manual prices are relatively cheap, the market price is about 800-1200 yuan, a little better, is a semi-automatic voice reading function, the magnification is above 3, the market price is about 2500 yuan, this has been Can meet most users' counting requirements. The fully configured automatic counters are mostly used in microbiology laboratories, with 3 million pixels, 9 million and 10 million pixels. The software adds a lot of analysis capabilities, the price is also 3-8 million. The imported colony counters mainly come from three countries, Germany, the United Kingdom and France. For semi-automatic instruments with the same function, the difference between domestic and imported prices is about 2-3 times. Fully automatic prices also differ by a factor of two. Demands should fully consider their own needs and budget
Instructions
1. Insert the power plug into the 220 volt power outlet.
2. Insert the counting pen plug into the jack on the instrument.
3. Turn the power switch to “ONâ€, the lamp in the counting tank is on, and the digital display should be “000â€, indicating that counting is allowed. If the number is not "000", press the zero key
4. Place the Petri dish to be tested (bottom side of dish) into the counting chamber.
5. Count all the colonies on the bottom of the dish with a counting pen. Each one should hear the “beep†before it is valid, otherwise it should be focused. At this point, the colonies that are spotted are marked with color and the numbers are automatically added.
6. Check carefully with a magnifying glass and confirm that the number of points has not been missed and the count is complete.
7. The number shown is the number of colonies in the petri dish.
8. Take out the petri dish after recording the numbers. Press the “0†key, the display will restore “000†to prepare for the counting of another petri dish.
Precautions
1. The instrument should be placed on a flat, solid bench.
2. When the number of colonies is counted, the counting pen should not be tilted too much. When you gently tap down until you feel bouncing, you can hear a “beep†sound. If you click too heavy, it is easy to damage the counting pen.
3, the instrument should be moisture, anti-vibration, anti-direct sunlight exposure, anti-acid-alkali erosion, dust cover should be added after use.
4, pay attention to prevent bacterial contamination count pool.
5, if the instrument does not count the problem, press the test button. Such as counting, indicating that the pen is bad. If it still does not count, it means that the instrument itself has a problem. If it is found to be faulty, please do not disassemble it. Please have experienced technicians repair or repair by the factory.
effect
The most used sequential logic circuits in digital electronics. The counter can be used not only for counting clock pulses, but also for dividing, timing, generating beat pulses and pulse sequences, and performing numerical operations. However, the calculation result cannot be displayed. Generally, it is displayed through an external LCD or LED screen.
species
1. If the triggers in the counter are reversed at the same time, the counters can be divided into two types: synchronous counters and asynchronous counters.
2, if according to the number in the counting process increases or decreases the classification, but also the counter can be divided into addition counters, subtraction counters and reversible counters, with the clock signal is increasing for the addition counter, constantly reducing the subtraction counter, can increase or decrease called Reversible counter.
There are also many categories that are not listed one by one, but the most common one is the first one, because the classification can make people know at a glance how the counter is actually triggered so that the designer can design the circuit.
application
Software Description
The counter application includes recordings such as calls, text messages, data, etc., and supports the user to select the clear date and add the reminder value according to the category. For example, the user can select any day of the month, or the first day and the last day as the recording cycle. On the zero-clear day, reminder nodes for the duration of calls, the number of short messages, and the amount of data traffic are added at the same time.
Counters are used for industrial features are: 1, there are 6 LED digital display; 2, at the same time there are points A and B two count input; 3, count frequency up to 20KHz; 4, also with LED warning light indication; 5 Supports RS485 and RS232 serial interfaces at the same time. Output, power, and communication use optical isolation from each other without interference
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