As one of the important instruments for detecting nutrients and components contained in soil, soil nutrient detector has always been an essential instrument for many laboratories. Testing soil nutrients not only has a great impact on agricultural production, but also is inseparable from economic development. The ability to choose a good soil nutrient tester is often the key to testing the success of fertilization. Therefore, you should pay attention to the following points:
1. To select a product with a prototype test certificate and a manufacturing license for measuring instruments:
The state has strict management of the production of measuring instruments. The soil nutrient measuring instrument is a measuring instrument. It must be inspected and determined by the metrological product supervision and inspection department for the performance and reliability of the prototype.
The soil nutrient tester should verify the stability, repeatability, sensitivity and linearity of the instrument, as well as the vibration resistance, temperature resistance and insulation safety of the instrument.
The soil nutrient detector must comply with the national verification regulations and the requirements of the power supply test, environmental test and safety test of the electronic measuring instrument, in order to be issued by the metrology management department.
On the basis of the qualified test of the prototype, the technical supervision department shall also evaluate the production conditions of the production facilities, personnel technical level, technical documents, verification conditions, management system, etc., and pass the assessment before issuing the manufacturing license certificate for measuring instruments.
Second, we must focus on checking the stability error of the soil nutrient analyzer
It should be pointed out that the prototype test certificate only indicates that the performance of the instrument has met the requirements of the national verification regulations. For the soil nutrient test, the measurement accuracy requirements of nitrogen and potassium can generally be met, but the measurement accuracy of organic matter and phosphorus cannot be guaranteed.
The method of inspection is: 1. Turn on the power to warm up the instrument for 5-10 minutes; 2. Cover the instrument with the light-shielding cover, adjust the instrument to make the display read zero; 3. Observe the reading of the instrument, the maximum and minimum of the instrument within three minutes The difference in readings divided by the full-scale reading is the stability error of the instrument. As the saying goes, the instrument is afraid of being unstable, and the instrument with unsatisfactory stability cannot be used.
As an important “decision maker†to test the yield of crops, it is more important that the soil nutrient speed meter is good or not. With the above aspects, I believe that you will not be confused when choosing a soil nutrient speed meter.
1. To select a product with a prototype test certificate and a manufacturing license for measuring instruments:
The state has strict management of the production of measuring instruments. The soil nutrient measuring instrument is a measuring instrument. It must be inspected and determined by the metrological product supervision and inspection department for the performance and reliability of the prototype.
The soil nutrient tester should verify the stability, repeatability, sensitivity and linearity of the instrument, as well as the vibration resistance, temperature resistance and insulation safety of the instrument.
The soil nutrient detector must comply with the national verification regulations and the requirements of the power supply test, environmental test and safety test of the electronic measuring instrument, in order to be issued by the metrology management department.
On the basis of the qualified test of the prototype, the technical supervision department shall also evaluate the production conditions of the production facilities, personnel technical level, technical documents, verification conditions, management system, etc., and pass the assessment before issuing the manufacturing license certificate for measuring instruments.
Second, we must focus on checking the stability error of the soil nutrient analyzer
It should be pointed out that the prototype test certificate only indicates that the performance of the instrument has met the requirements of the national verification regulations. For the soil nutrient test, the measurement accuracy requirements of nitrogen and potassium can generally be met, but the measurement accuracy of organic matter and phosphorus cannot be guaranteed.
The method of inspection is: 1. Turn on the power to warm up the instrument for 5-10 minutes; 2. Cover the instrument with the light-shielding cover, adjust the instrument to make the display read zero; 3. Observe the reading of the instrument, the maximum and minimum of the instrument within three minutes The difference in readings divided by the full-scale reading is the stability error of the instrument. As the saying goes, the instrument is afraid of being unstable, and the instrument with unsatisfactory stability cannot be used.
As an important “decision maker†to test the yield of crops, it is more important that the soil nutrient speed meter is good or not. With the above aspects, I believe that you will not be confused when choosing a soil nutrient speed meter.
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