ISO 19685:2017确定了皮拉尼压力计的参数及其校准程序，并描述了操作这些压力计时应考虑的测量不确定性。 ISO 19685:2017适用于在0.01 Pa至150 kPa压力范围内工作的皮拉尼真空计。 在校准皮拉尼压力计并将其用作参考标准时，ISO 19685:2017补充了ISO 3567和ISO 27893。 此外，ISO 19685:2017规定了皮拉尼压力计响应时间和滞后特性的描述程序。

ISO 19685:2017 identifies parameters of Pirani gauges, their calibration procedure, and describes measurement uncertainties to be considered when operating these gauges. ISO 19685:2017 applies to Pirani vacuum gauges operating over a pressure range of 0,01 Pa to 150 kPa. ISO 19685:2017 complements ISO 3567 and ISO 27893 when calibrating Pirani gauges and using them as reference standards. In addition, ISO 19685:2017 defines procedures to characterize Pirani gauges for response time and hysteresis.