1.1本指南涵盖了两种商用水三相点电池（A型和B型，见图1）的性质，并提供了制备电池以实现水三相点和校准温度计的方法。给出了确保合格电池和尚未合格电池完整性的测试。还描述了处理电池以避免破损的注意事项。 1.2讨论了静水压力对水三相点电池温度的影响。 1.3附录X1和附录X2中描述了针对自加热和静水压力的影响调整观察到的SPRT电阻读数的程序。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 图1:A型和B型两种常用的水电池三相点的配置，其中准备了冰盖，以在冰/水平衡温度下进行测量。电池浸入控制在0.01附近的冰浴或水浴中使用 ° C（见5.4） ====意义和用途====== 本指南描述了将水三相点电池投入使用以及将其用作温度计校准中的参考温度的程序。 达到的参考温度是纯水的基本状态，即共存的固相、液相和汽相之间的平衡。 电池需经过鉴定，但不需校准。通过与已知历史的类似合格电池组进行比较，电池可以被鉴定为能够代表基本状态（见4.2），并且它可以被鉴定为合格，并且其制造商可以记录鉴定。 合格水三相点电池的温度在ITS-90上精确为273.16 K，除非对同位素成分进行校正（参考附录X3）。 合格电池的持续准确性取决于持续的物理完整性。这可以通过第6节中描述的技术进行验证。 本标准中所述的商用水电池三相点能够达到以下范围的扩展不确定度（k=2） ± 0.1 mK和 ± 0.05 mK，取决于制备方法。应遵循规定的测量程序，以达到这些不确定度水平。

1.1 This guide covers the nature of two commercial water triple-point cells (types A and B, see Fig. 1) and provides a method for preparing the cell to realize the water triple-point and calibrate thermometers. Tests for assuring the integrity of a qualified cell and of cells yet to be qualified are given. Precautions for handling the cell to avoid breakage are also described. 1.2 The effect of hydrostatic pressure on the temperature of a water triple-point cell is discussed. 1.3 Procedures for adjusting the observed SPRT resistance readings for the effects of self-heating and hydrostatic pressure are described in Appendix X1 and Appendix X2. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. FIG. 1 Configurations of two commonly used triple point of water cells, Type A and Type B, with ice mantle prepared for measurement at the ice/water equilibrium temperature. The cells are used immersed in an ice bath or water bath controlled close to 0.01 ° C (see 5.4) ====== Significance And Use ====== This guide describes a procedure for placing a water triple-point cell in service and for using it as a reference temperature in thermometer calibration. The reference temperature attained is that of a fundamental state of pure water, the equilibrium between coexisting solid, liquid, and vapor phases. The cell is subject to qualification but not to calibration. The cell may be qualified as capable of representing the fundamental state (see 4.2) by comparison with a bank of similar qualified cells of known history, and it may be so qualified and the qualification documented by its manufacturer. The temperature to be attributed to a qualified water triple-point cell is exactly 273.16 K on the ITS-90, unless corrected for isotopic composition (refer to Appendix X3). Continued accuracy of a qualified cell depends upon sustained physical integrity. This may be verified by techniques described in Section 6. The commercially available triple point of water cells described in this standard are capable of achieving an expanded uncertainty (k=2) of between ± 0.1 mK and ± 0.05 mK, depending upon the method of preparation. Specified measurement procedures shall be followed to achieve these levels of uncertainty.