The pesticide residue tester (agricultural residue speed tester) has a large difference in measurement results in different channels. What is going on?
A: Domestic various pesticide residue speed measuring instruments (agricultural residual speed measuring instrument), due to technical problems of the manufacturer, some pesticide residual speed measuring instrument (agricultural residual speed measuring instrument) uses a single light source, cyclically detects different channels, and the light source moves. The time difference caused by the process can cause measurement errors. Another type of pesticide residue tester (a pesticide residue tester), although each fixed light source detects a fixed channel, but because the frequency of use of each channel is different, causing the aging of the light source and the degree of voltage attenuation are different, which may cause errors.
Solution: Adjust the source voltage to 5.1 volts, and operate the potentiometer switch. Try to choose a pesticide residue tester (a pesticide residue tester) with self-test function. The light source can be automatically adjusted to maintain the consistent detection results of each channel. The PR-203-8T pesticide residue speed measuring instrument (a pesticide residue measuring instrument) produced by Henan Yunfei Technology Development Co., Ltd. has this function.
What should I do if the pesticide residue tester (Pesticide Residue Tester) frequently has a negative value during the test?
Answer: Solution: Re-calibrate the instrument, make blank control, blank control and sample temperature, the reaction time is absolutely consistent. According to the above method, the pesticide residue tester (agricultural residual speed tester) still has this problem, because Some samples have a darker color and a higher initial value of absorbance.
Pesticide Residue Tester (Pesticide Residue), why can't the culture process be omitted when testing samples?
Answer: The culture process is the process of reaction between enzymes and pesticides. Omission will result in low detection results and true values.
What kind of pesticide residue tester (agricultural residue speed tester) in China, how to do frequent crashes?
A: Due to its design flaws, the chip is too small, the function design is too cumbersome, slow down the detection process, and not let it work at full load.
How to test spicy samples?
Answer: The whole plant can be immersed, such as leeks, and the weight of one plant is about 1.7g, which can be extracted at a ratio of 1ml plus 5ml of extract.
How to choose a pesticide residue tester (a pesticide residue tester)?
Answer: There are various types of pesticide residue speed measuring instruments (variety of pesticide residues) in China. The principle of detection is basically the same. It is best to choose a pesticide residue speed measuring instrument (a pesticide residue speed measuring instrument) with automatic adjustment function. It can omit the trouble of adjusting 0 to 100, and it is not necessary to adjust the potentiometer voltage in the future to let the manufacturer maintain. In the future, consumables can be used universally, so that users can have more initiative in the future use.
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Micro mini camera is a product of modern high-tech, also known as micro monitor. It has the characteristics of small size, powerful function and good concealment.
Micro cameras are widely used in aviation, commerce, media, enterprises, institutions, families and other industries. The appearance of micro cameras has brought convenience to people's lives. At the same time, some phenomena related to corporate secrets and personal privacy have also emerged.
In 1991, the world's first camera (called CoffeeCam) first appeared in the Trojan room coffee pot at the University of Cambridge, UK.
The oldest camera, FogCam of San Francisco State University, has been used since 1994
In 1996, AXIS Communications published the first IP Camera using Internet architecture as the basis for signal transmission.
In 1999, AXIS Communications published IP Camera based on Linux system.
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