- Phone
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Address
No. 75 Sancun Road, Gaofeng Village, Gaoqiao Town, Yinzhou District, Ningbo City
Ningbo Textile Instrument Factory
No. 75 Sancun Road, Gaofeng Village, Gaoqiao Town, Yinzhou District, Ningbo City
:1. Power supply voltage: AC220V ± 10V, 50Hz
2. Instrument host width x depth x height: 645 x 500 x 660mm
3. Temperature and humidity sensor accuracy: ± 0.2 ℃/± 2% RH
4. Vacuum pump can draw negative pressure: -0.05 MPa max
5. Negative pressure detection range: -0.1 to 0 MPa
6. Temperature controlled heating table diameter: Φ 68mm
7. Touch screen: 7 inches
8. Heating plate heating plate: 40 ℃/5 minutes;
9.200 microliters of water will evaporate evenly in the box within 20 minutes;
10. High sealing performance of the box: leakage rate of 1kPa/20 minutes
11. Standard coefficient F value test accuracy ≤ 1.6
12. Low noise during work, ≤ 45dB
13. High precision thermometer, ± 0.1 ℃
14. Relative precision of hygrometerHigh degree±2%
1.2 Testing principle
Place the opened sample into a sealed box of a specific volume, monitor the temperature and humidity of the sample when it is placed in the box and after 20 minutes in the sealed box, calculate the absolute mass of water in the sealed box before and after 20 minutes, and use the difference method to obtain the absolute mass of water added in the sealed box.