应用案例

温湿度测试

一、什么是温湿度测试

温湿度测试的目的是保证受测试区域内空气温湿度水平在客户指定的时间段内符合控制限度。合理的温湿度范围不仅可以降低空调系统的能耗,也可有效提高洁净室内身着洁净服的工作人员的舒适度。

二、法规对温度/湿度测试设备的要求

Temperature test 温度测试

The temperature test should be performed using a sensor that has accuracy as defined in ISO 7726, for example:

温度测试应使用具有ISO 7726中定义的精确度的传感器进行,例如:

• expansion thermometers;膨胀温度计

• liquid expansion thermometer;液体膨胀温度计

• solid expansion thermometer;固体膨胀温度计

• electrical thermometers;电温度计

variable resistance thermometer, including:可变电阻温度计,包括:

platinum resistor;铂电阻

thermistor;热敏电阻

thermometer based on the generation of an electromotive force (thermocouple);基于电动势产生的温度计(热电偶)

thermos manometers (variation in the pressure of a liquid as a function of temperature).热压力计(液体压力随温度的变化)

The minimum measurement resolution requirement for the apparatus is 20 % of the allowable temperature range for the difference between the set point temperature and the permissible range of variation allowed from that set point.

该设备的最小测量分辨率要求是设定点温度和该设定点允许的允许变化范围之差的允许温度范围的20%。

NOTE:The requirement of range, accuracy, etc, depends on the purpose of the cleanroom or clean zone. ISO 7726 is for a general purpose.

注意:范围、准确度等的要求,取决于洁净室或洁净区的用途。ISO 7726是通用的。



Humidity test C.7湿度测试

Humidity tests should be performed using a sensor that has accuracy appropriate to the measurement as stated in ISO 7726.

湿度测试应使用符合ISO 7726所述测量精度的传感器进行。

Typical sensors are: 典型的传感器有 :

• dewpoint hygrometers (e.g. psychrometer);露点湿度计(例如干湿表)

• electrical conductivity variation hygrometer;电导率变化湿度计

• lithium chloride hygrometer;氯化锂湿度计

• capacitance hygrometer. 电容湿度计

The minimum measurement resolution for the apparatus should be 20 % of the allowable relative humidity range for the difference between the set point humidity and the permissible range of variation allowed from that set point.

仪器的最小测量分辨率应为设定点湿度和该设定点允许变化范围之差的允许相对湿度范围的20%。

NOTE:The requirement of range, accuracy, etc, depends on the purpose of the cleanroom or clean zone. ISO 7726 is for a general purpose.

注意:范围、准确度等的要求,取决于洁净室或洁净区的用途。ISO 7726是通用的。

三、检测方法和周期

1.检测方法

(1)无恒温恒湿要求的温湿度检测

测试方法

a) 测定之前,空调净化系统应已连续运行至少8h

b) 应在温湿度读数稳定后记录。测完室内温湿度后,还应同时测出室外温湿度。

(2)有恒温恒湿要求房间的温湿度检测

测试方法:

a) 室内空气温度和相对湿度测定之前,空调系统应已连续运行至少12h

b) 根据温度和相对湿度波动范围,应选择相应的具有足够精度的仪表进行测定。根据由低到高的精度,测定宜连续进行(8~48h,每次测定间隔不应大于30min


三、相关标准

• ISO 14644-3:2019

• GB 50591-2010

• 2010年中国GMP指南