Accurate mass determination is vital across scientific, industrial, and technological applications, serving as the cornerstone of measurement quality and reliability. Hydraulic pressure balances are renowned for their precision and play a pivotal role in pressure generation. However, the influence of OIML weights used as reference on mass determination accuracy remains a complex and often overlooked aspect. This article investigates, whether OIML weights when used as a reference in determining the weight of disk masses, have an effect on the pressure generated in hydraulic pressure balances, and tries to shed light on the subtle relationship between the weight determination of disk masses and measurement uncertainty. In this study, a hydraulic pressure balance with a measuring range of 20–1600 bar was employed, focusing on three distinct scenarios utilizing different OIML weights (E1, E2, and F1) as references for mass determination. The results revealed small differences in reference pressure (ranging from 2 to 10 ppm) due to variations in mass values resulting from different OIML weight classes used as reference. Importantly, these discrepancies remained within acceptable measurement uncertainty limits, especially in high-pressure scenarios. The primary contributor to measurement uncertainty was the pressure distortion coefficient, emphasizing its significance in calibration and measurement processes. This research provides valuable insights into the interplay of accuracy of OIML weights used as reference, mass determination, and measurement uncertainty in hydraulic pressure balances. It highlights the robustness of pressure balances in high-pressure settings and suggests that variations in weight accuracy classes used as reference have minimal impact on measurement accuracy. Future research may extend these findings to low-pressure systems, offering opportunities to refine measurement practices in the field of pressure metrology.

准确的质量测定对于科学、工业和技术应用至关重要，是测量质量和可靠性的基石。液压压力天平以其精度而闻名，在压力产生中发挥着关键作用。然而，用作参考的 OIML 权重对质量测定精度的影响仍然是一个复杂且经常被忽视的方面。本文研究了 OIML 重量作为确定盘质量的参考时是否会对液压天平中产生的压力产生影响，并试图阐明盘质量的重量确定与测量之间的微妙关系不确定。在本研究中，采用了测量范围为 20-1600 bar 的液压天平，重点关注利用不同 OIML 重量（E 1、E 2 和F 1）作为质量测定参考的三种不同场景。结果显示，由于用作参考的不同 OIML 重量等级导致质量值变化，因此参考压力存在微小差异（范围为 2 至 10 ppm）。重要的是，这些差异仍然在可接受的测量不确定度范围内，特别是在高压情况下。造成测量不确定度的主要因素是压力畸变系数，强调了它在校准和测量过程中的重要性。这项研究为液压天平中用作参考的 OIML 权重精度、质量测定和测量不确定度之间的相互作用提供了宝贵的见解。它强调了压力天平在高压环境下的稳健性，并表明用作参考的重量精度等级的变化对测量精度的影响最小。未来的研究可能会将这些发现扩展到低压系统，为改进压力计量领域的测量实践提供机会。