第4.9章涵盖了确定计算位移校准仪或容积式储罐校准仪的基准校准仪体积（BPV）所需的现场数据所需的所有程序。它将使用户能够执行准备校准仪所需的所有活动，进行校准运行，并记录计算位移和储罐校准仪基本体积所需的所有数据。还讨论了结果评估和许多校准问题的故障排除。本部分（第4.9.1章）为引言，包含所有相关方面，这些方面在本质上是通用的，但至关重要，适用于所有不同的校准方法。 因此，描述校准仪校准具体方法的每个后续部分应与第1部分一起使用。这两部分共同包含完成所需校准方法所必需的所有信息。

Chapter 4.9 covers all the procedures required to determine the field data necessary to calculate a base prover volume (BPV) of either displacement provers or volumetric tank provers. It will enable the user to perform all the activities necessary to prepare the prover, conduct calibration runs, and record all the required data necessary to calculate the base volumes of displacement and tank provers. Evaluation of the results and troubleshooting of many calibration problems are alsodiscussed.This component, Chapter 4.9.1, is the introduction, and contains all those relevant aspects that are general in nature, yet essential and applicable to all the different methods of calibration. Therefore, each subsequent part, which describes a specific method of prover calibration, shall be used with Part 1. Together, the two parts contain all the information that is essential to complete the required method of calibration.