This part of GB/T18204 specifies the measurement methods for physical factors in public places. This section is applicable to the determination of physical factors in public places、 and can be referenced for other indoor environments such as residential areas. Note: In this section、 except for the fresh air volume inspection method、 if there are two or more inspection force methods for the same indicator. You can choose to use it according to technical conditions、 but the * * method is the clock warfare method. 2 Normative References The following documents are essential for the application of this document. For dated references、 only the version marked with the H period applies to this document. For undated references、 the new version (including all modification orders) applies to this document. GB/T 18049 Determination of PMV and PPD Index in Moderate Thermal Environment and Regulations on Thermal Comfort Conditions GB/T 18883-2002 Indoor Air Quality Standard HJ/T 10.2 Guidelines for Radiation Environmental Protection Management Electromagnetic Radiation Monitoring Instruments and Methods 3 Air Temperature 3.1 Glass Liquid Thermometer Method 3.1.1 Principle Glass Liquid Thermometer is composed of a thin-walled thermometer containing the thermometer liquid and a glass tube sealed and connected to the thermometer. The change in air temperature causes a change in the temperature of the bulb、 and the volume of liquid inside the bulb also changes accordingly. When the temperature of the bulb increases、 the liquid expands. The liquid column inside the thin tube rises: and vice versa. The glass tube is marked with a scale to indicate the height of the liquid column inside the tube、 and the liquid column quotient reading accurately indicates the temperature of the temperature bulb. 3.1.2 Instrument 3.1.2.1 Glass liquid thermometer; The scale * decimal point value shall not exceed 0.2 C、 and the measurement accuracy shall be ± 0.5 C. 3.1.2.2 Thermometer suspension bracket. 3.1.3 Measurement steps 3.1.3.1 The arrangement of measurement points is shown in Appendix A、 A.2. 3.1.3.2 After 5 to 10 minutes、 take a reading. When reading、 read decimals first and then integers. When reading、 the line of sight should be perpendicular to the thermometer scale. Mercury thermometers should read at the high point of the convex lunar surface、 while alcohol thermometers should read at the low point of the concave lunar surface. 3.1.3.3 The reading should be fast and accurate to avoid the impact of human breath on the accuracy of the reading. 3.1.3.4 Due to the thermal aftereffect of F glass、 the zero position of liquid glass thermometers should be frequently corrected with a standard thermometer. If there is a displacement at the zero point、 the displacement value should be added to the reading. 3.1.3.5 In order to prevent the influence of thermal radiation such as sunlight、 the temperature bulb needs to be covered with heat when necessary

Baijian is committed to providing convenient and efficient testing services for enterprises and individuals、 simplifying testing processes、 improving the efficiency of testing services、 using Internet plus testing e-commerce to provide customers with diversified choices、 fundamentally reducing testing costs、 improving time efficiency、 breaking industry limitations and bottlenecks、 and creating an innovative testing platform in the industry. If you need it、 please contact 18501763637

Function of testing report:

1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report

inspection and testing process:

1. Telephone communication and confirmation of requirements

Testing and testing characteristics:

1. The testing industry is fully covered、 meeting different testing needs

3. Engineers provide one-on-one services to make testing more accurate

4. Free initial testing、 with no testing fees charged

5. Self service order delivery for free on-site sampling