Constant Temperature and Humidity Weighing System en Pekín, China

The sampling head, which has been balanced according to 8.2.1 treatment, is selected to be weighed with a balance in a constant temperature and little equipment. Each sample should be weighed with 2 words, each weighing interval should be more than 1 hour, and the deviation of the two weighing results should be within 0.2mg. The weighing results are recorded, and the average value of the two weighing results is taken as the weighing result. When the mass of the same sampling head is greater than 0.2mg in the second weighing, the corresponding sampling head can be re-balanced for at least 24h before weighing. If the mass difference between the second weighing and the last weighing is still greater than 0.2mg, the corresponding sampling head can be re-balanced for at least 24h before weighing.
Characteristics:
1.
Balance of samples in the box with constant temperature and humidity with high precision.
2.