Testing Standards of Carbon Sulfur Analyzer and Tungsten Granule——Test Conditions and Test Methods

Except the technical requirements, testing standards of carbon sulfur analyzer and tungsten granule also include - test conditions, test methods, management of the results of treatment, re-testing period. The relative standard deviation of carbon is lower than 1.0%, sulfur should be lower than 4.0%, the analysis time should less than one minute, the weighing stability of less than 0.002 grams. Environment conditions for testing should meet the standards. The ambient temperature should be controlled between 15 ℃ to 30 ℃, relative humidity must be less than 80%. If it is measured against the amount of 0.0010% to 0.0100% of the carbon and sulfur, the relative humidity should be less than 60%. Power supply is (220 ± 4.4) V, (50 ± 1) Hz, and it should be ensured that the detection environment has no strong vibration, no strong electric, no active gases and without any impede of magnetic fields.

The main test equipments and materials for detection should be in accordance with national standards. Using the approved the steel components by the state metrological administrative department to analyze national primary, secondary reference material. Uncertainty of the determination of carbon and sulfur less than one-third of error of indication, weighing with 1g standard weights. According to visual indication and touch to detect the appearance of instrument. The instrument is required to be preheated on the basis of instructions before detecting. Select carbon content within the range from 0.100%  1.000%, and choose sulfur content within the range from the 0.010% to 0.100%, weighing 0.5 g of sample every time, repeated detecting for 7 times, calculating the standard deviation and relative standard deviation in according with the standard formula calculation method . Weighing with 1 g standard weight, continuously weighing for six times, the difference between the maximum and the minimum is called weighing stability. After the test is completed, certificate of qualification can be sent, if unqualified, pointing out that the failed project. Test cycle usually two years. While moving, repairing or doubting on the measurement results, users can test the instrument.

If the carbon sulfur analyzer used by the company are not included in the mandatory verification of measuring instruments catalog, on the other hand, these instrument are not applied in trade settlement, safety, health, environmental monitoring, there is no need to test it compulsively.

• < Prev
• Next >