![]() Too much or too little loading will change the space height above the liquid level, which will affect the mixed concentration of oil vapor and air, and make the measurement result inaccurate. Requirements for operation of closed flash point testerĪccording to the standard requirements, the sample in the cup should be loaded at the annular line. If the brightness is insufficient, the metal coil on the igniter should be polished first, or it is recommended to replace the all-platinum ignition coil.Ĥ. If the electric ignition method is used, the brightness of the igniter should be observed. Therefore, when measuring the flash point meter, if the gas ignition method is used, the size of the flame should be paid attention to at all times, because many times the instability of the gas source will directly affect the flicker of the flame. As a result, the flash point measurement results are on the high side. After a period of use, the brightness of the igniter decreases and the temperature cannot meet the use requirements. ![]() At present, most electric ignition closed-end flash point instruments generally exist. If electric ignition is used, it is necessary to pay attention to the brightness of the ignition wire. If the diameter of the spherical flame is too large, the distance from the liquid surface is too close, and the residence time is too long, the ignition will be advanced, and the measurement results will be low. If the pre-flash value is set too high, high concentration of oil and gas will accumulate in the middle of the oil cup at the beginning of ignition, leading to early flash, resulting in low measurement results.ĭuring ignition, the size of the spherical flame, the distance from the liquid surface of the sample and the residence time shall be in accordance with the provisions of the national standard. If the pre-flash value is set too low, the ignition temperature will be advanced, and some oil and gas will be released and consumed during each ignition, which will increase the temperature reaching the lower explosion limit, and the measurement result is on the high side. It is generally believed that when the water content of the sample is greater than 0,05%, it must be dehydrated before the flash point test.īefore measuring the flash point, it is necessary to set the pre-flash value. Higher ambient humidity may make the sample water. At this time, if they are not properly stored. However, since the specification of flash point reference materials is generally (100~250) mL, and the amount required for one measurement is about (50~70) mL, it is often encountered that the flash point reference materials are not used up after being unpacked for metering. Under normal circumstances, flash point reference materials are directly used after dehydration and sealed packaging. ![]() It affects the normal vaporization of oil products, delays the flash time, and makes the determination result on the high side. It is widely used in electric power, petroleum, chemical industry, commodity inspection, scientific research and other departments, meeting the requirements of ASTM D93 and GB/T 261-2008 standard methods.ĭuring the test, if the flash point reference material used contains water, the water dispersed in the oil will vaporize to form water vapor in the process of heating to determine the flash point, and sometimes form bubbles to cover the liquid surface. The closed flash point tester is mainly used for the determination of the closed flash point value of petroleum products. ![]() Huazheng Eléctrico Fabricación (Baoding) Co., LtdĬorreo electrónico: Valle Tecnología Centro, No.3088 Lekai Calle, Hola - tecnología Zona, Baoding, Hebei, Porcelana. Equipo de prueba de herramientas de seguridad eléctrica.Probador de resistencia interna de batería.Conjunto de prueba de inyección de corriente primaria.Probador de interruptores de alto voltaje.Sistema de ubicación de fallas de cable.Prueba de capacitancia y tan delta del transformador.Analizador de respuesta de frecuencia de barrido.Probador de resistencia de transformador DC.Probador de carga del transformador y sin pérdida de carga.Equipo de prueba de relé de inyección secundaria.Probador de pérdida dieléctrica de aceite de transformador.Probador de aceite de transformador BDV.Probador de humedad de trazas de aceite.Probador de punto de inflamación de aceite.Equipo de prueba de voltaje ultra alto UHV.Transformador de prueba de alta tensión.
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