The inspection items are as follows: temperature deviation; Relative humidity deviation; Temperature fluctuation; Relative humidity fluctuation; Temperature uniformity; Uniformity of relative humidity; Average rate of temperature change every 5 minutes; Wind speed; Temperature rise and fall characteristics; Temperature indication error; Temperature overshoot; Relative humidity versus impulse; When the temperature overshoot recovers; Relative temperature overshoot recovery time; Noise Record a total of 30 times within 30 minutes, starting from 15 minutes before the cooling stage, measure the temperature and humidity values at the center point every 1 minute until the humidity in the workspace reaches 25 ℃± 3 ℃ The sensor should not be directly radiated by cold and heat sources, and the measurement points should be located on the upper, middle, and lower layers respectively. The temperature measurement points are represented by O, A, B, C, D, E, F, G, H, J, K, L, M, N, U
The small distance for drunkenness should not be less than 50mm. If the equipment is equipped with a sample rack or sample car, the lower measurement point can be placed 10mm above the sample rack or sample car The relative humidity measurement points are represented by Oh, Dh, Hh, and Lh. The number and placement of wind speed measurement points are identical to those of temperature measurement points. The measurement points E, O, Oh, and U are located at the geometric centers of the upper, middle, and lower layers, respectively After entering the high-temperature and high humidity constant stage, stabilize for 30 minutes and start recording the temperature and humidity values at each measurement point and the temperature and humidity values indicated by the equipment, every 1 minute Install temperature and relative humidity measurement sensors at the specified positions. Ensure that the temperature of the workspace reaches 25 ℃± 3 ℃ and the relative humidity is maintained between 45% RH and 75% RH According to the needs of testing and inspection, measurement of doubtful points can be added in the working space of the testing equipment. The measurement point of the average temperature change rate every 5 minutes is the geometric center point of the working space
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. 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
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China