Thousand grain weight measurement instrument selection guide
Seed quality is the guarantee of crop yield. Only good seed can grow strong seedlings, and at the same time it can have a good harvest in the near future. Seed quality includes seed purity, seed germination rate, seed moisture content, etc. These are the contents, and the premise of these is that the seed requirement is full, and the fullness of the seed is measured in terms of 1000-grain weight.
The difference in seed particle size resulted in a very large difference in the 1000-grain weight of the seed, which was about 200 g for the large grain grain, about 20 g for the medium grain grain, and about 5 g for the small grains grain. It is precisely because the seed weights of different particle sizes are not the same that determines the choice of instrument at the time of measurement. The number of seed particles can be measured using an electronic automatic counting instrument. The measurement of weight is performed using a balance. The instrument to select, pay attention to the number of seeds to be determined by the seed sample tray, large-grained use of large-grain sample trays can use the SLY_B model of the seed counting instrument, medium and small grain of the use of small and medium grain plate SLY_A models of electronic automatic number The particle meter, if both must be taken care of, then use the SLY_C model electronic automatic particle counting machine to operate directly.
The choice of the measuring scale: The requirements of the large and medium particles on the balance are the amount of 0.1g, and the seeds below 10g have higher requirements on the balance, and the amount of inductance needs to be 0.01g. Sample mass ≤ 1g, weighed to 4 decimal places; 1-9.99g weighed to 3 decimal places; 10-999.9g weighed to 2 decimal places; 1000g or more weighed to an integer. If the difference between the previous two measurements does not exceed 5%, the weighing can be stopped and the weights of the two samples can be averaged to obtain the 1000-grain weight of the seeds. If the allowable error is exceeded, several grains must be taken again and weighed until two weighings are within the allowable error, and then the 1000-grain weight of the seed is calculated.
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