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Design and Development of an Indigenous Cross-Floating Pressure Calibration System up to 140 MPa
MAPAN ( IF 1 ) Pub Date : 2021-04-28 , DOI: 10.1007/s12647-021-00450-4
Raman Kumar Sharma , Shanay Rab , Lalit Kumar , Afaqul Zafer , Sanjay Yadav

Precise and accurate pressure measurements play a prominent role in several scientific applications. The pressure balances (PBs) are used as a primary standard for pressure measurements which requires utmost accuracy. In the case of calibration and characterization of these PBs, the method of cross-floating is an internationally accepted practice used for the comparison of 2 PBs for determining their metrological parameters, i.e. effective areas, distortion coefficient and zero pressure area etc. The present paper describes the work which has been carried out to develop a cross-floating pressure balance calibration system for an organization engaged in R&D activities and providing calibration services to the process industries. The study also describes some of the newly designed, developed, upgraded and fabricated components and devices for a cross-floating system in hydrostatic pressure range up to 150 MPa. The whole system consists of an upgraded hydraulic screw pump, newly designed, developed and fabricated oil reservoir, cross-float valve, use of two commercially available needle valves in combination with a pressure balance supplied by the customer with associated pressure fittings and connector in the pressure transmitting circuit. The characterization of the pressure balance was also done using the newly developed components/parts and instruments at 12 calibration points in the high pressure range (7–140) MPa and 11 calibration points in the low pressure range (0.2–7) MPa. The development process was started in the year 2018 and completed in the month of November 2020. The combined relative measurement uncertainty (at coverage factor, k = 2) associated in high pressure range is found to be 59.3 × 10−6 and 42.3 × 10−6 with associated pressure and effective area, respectively. Similarly, in low pressure range the combined relative measurement uncertainty (k = 2) is found to be 62.2 × 10−6 and 47.3 × 10−6 with associated pressure and effective area, respectively. The results obtained are found in excellent agreement with the values of uncertainty and the effective area reported by the manufacturer. This newly developed system will help the customer in providing in-house traceability to their own instruments as well services to the industries.



中文翻译:

最高140 MPa的本地横向浮动压力校准系统的设计和开发

精确而准确的压力测量在一些科学应用中起着重要作用。压力天平(PBs)用作压力测量的主要标准,要求最高的精度。在对这些PB进行标定和表征的情况下,交叉浮动方法是国际上公认的惯例,用于比较2个PB以确定其计量参数,即有效面积,畸变系数和零压力面积等。描述了为从事研发活动并为过程工业提供校准服务的组织开发一种浮动式压力平衡校准系统而进行的工作。该研究还介绍了一些新设计,开发的,用于静水压力范围高达150 MPa的交叉浮式系统的升级和制造的组件和设备。整个系统包括升级的液压螺杆泵,新设计,开发和制造的储油器,浮球阀,使用两个市售针形阀以及客户提供的压力平衡以及相关的压力配件和连接器。压力传递电路。还使用新开发的组件/部件和仪器在高压范围(7–140)MPa的12个校准点和低压范围(0.2–7)MPa的11个校准点上对压力平衡进行了表征。开发过程于2018年开始,并于2020年11月完成。 发现在高压范围内相关联的k= 2)分别为59.3×10 -6和42.3×10 -6与相关联的压力和有效面积。类似地,在低压范围内,结合相关的压力和有效面积,组合的相对测量不确定度(k  = 2)分别为62.2×10 -6和47.3×10 -6。发现的结果与制造商报告的不确定度值和有效面积极佳地吻合。这个新开发的系统将帮助客户提供内部可追溯到他们自己的仪器以及对行业的服务。

更新日期:2021-04-29
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