温度高于300℃的标准水银温度计(以下简称温度计)在检定和使用中常出现如下水银蒸发现象: 1.当温度计从检定(或使用)温度介质内取出,置于室温下冷却后,在其中间泡上部普遍出现雾状的水银蒸发滴。 2.在示值稳定度检定中,经由上限温度缓慢冷却至室温处理后的温度计,在其浸没线 The standard mercury thermometer (hereinafter referred to as the thermometer) whose temperature is higher than 300 ℃ often appears the following mercury evaporation phenomena during the verification and use: 1. When the thermometer is taken out of the test (or use) temperature medium and is cooled at room temperature, The upper part of the bubble generally appear vaporized mercury droplets. 2. In the indication stability test, through the upper limit of the temperature slowly cooled to room temperature after treatment thermometer, in its immersion line