1. Please connect the power supply of the salt spray test chamber and the air compressor power supply first, and connect the air pressure air pipe. Glass Venlo Greenhouse is Spire-type glass design, design and installation of windows when more convenient and easy. Its roof slope andle can be appropriately according to the local real climate change the environment. Glass Venlo Greenhouse,Flowers Glass Greenhouse,Nursery Glass Greenhouse,Vegetables Glass Greenhouse JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.engreenhouse.com
2. Add pure water or distilled water to the water inlet in the cabinet and behind the cabinet until the low water level on the panel is off, otherwise it will not work properly.
3. Add water to the sink to prevent the salt spray from leaking.
4. The connection between the drain pipe and the exhaust pipe is completed. As shown on the previous page, the indicator is open to the left.
5. Preparation of test solution modulation method:
A. Cover layer, neutral salt spray test (NSS test)
a. The salt solution is prepared by using sodium chloride (chemically pure, analytically pure) and distilled or deionized water at a concentration of (5% ± 0.1)% by mass. The collected liquid after atomization shall not be reused except for the blocking part of the baffle;
b. The pH of the salt solution before atomization is between 6.5 and 7.2 (35 ± 2 ° C). When preparing a salt solution, a chemically pure solution of dilute hydrochloric acid or sodium hydroxide may be used to adjust the pH, but the concentration still meets the requirements of point a.
B. Metal coating, copper accelerated acetate spray test (CASS test)
a. Dissolve sodium chloride in distilled or deionized water at a concentration of 50 ± 5 g / L.
b. Add copper chloride (CuCl2·2H2O) to a solution at a concentration of 0.26±0.02 g/L (ie 0.205±0.015 g/L anhydrous copper chloride).
c. Add an appropriate amount of glacial acetic acid to the solution a to ensure that the pH of the salt spray collection in the test chamber is 3.1 to 3.3. If the pH of the solution before spraying is 3.0 to 3.1, the pH of the collected solution is generally in the range of 3.1 to 3.3. The pH of the solution can be measured with a pH meter, and a precision pH test paper that can be read by a pH meter can be used as a daily test. The pH of the solution can be adjusted with glacial acetic acid or sodium hydroxide.
d. To avoid nozzle clogging, the solution must be filtered before use.
Note: The metal cover, acetate spray test (ASS test) eliminates the "b" step in the "B" process.
6. Pour the brine into the salt replenishing bottle, that is, automatically fill the salt water into the spray tower in the laboratory to make the syrup flow to the salt spray tower.
7. Place the test piece or sample on the rack: the angle of the display shall be arbitrarily set according to the required standard. For example, the standard test piece 130×70 (mm) may be inclined at 15 degrees and 30 degrees.
8. Add water to the wet bulb, the wet bulb thermometer is covered with gauze, and the end of the gauze is placed in the wet bulb.
9. Set the test temperature: set according to the required standard (button "â–²" is added, button "â–¼" is reduced)
a. NSS, AASS test: laboratory temperature 35 ° C; saturated air barrel temperature 37 ° C (35 ° C ~ 40 ° C).
b. CASS test: test chamber temperature 50 ° C; saturated air drum temperature 55 ° C (50 ° C ~ 55 ° C).
10. Set the test time: 0~999Hr (H: when; press "" to increase; press "-" to decrease)
11. Press the power button and operate the button to pre-warm and reach the set temperature. Note: The test cover should be covered and handled with care to avoid damage.
12. Press the spray button:
a, open the air outlet valve in front of the air compressor, the pressure is adjusted to a pressure of 0.2 ~ 0.4MPa;
b. Adjust the pressure regulating valve to a pressure of 0.07~0.17MPa, and the pressure can be known by the pressure gauge (clockwise increase, counterclockwise decrease).
13. Press the time button to set the time according to the time set.
14. After the test is completed, turn off the switches in sequence.
15. If there is any abnormality in the test, please refer to the function abnormality judgment table for processing.
In Venlo greenhouse, foundation is made of reinforced concrete and the side wall is made of brick or reinforced concrete plate. the steel frame always use hot dip galvanized light steel. Roof beam adopts horizontal girder structure and using herringbone connection. The horizontal girder bears 2 or more roofs, which is made of aluminum alloy. This material is used as roof structure material and also glass inlay material. Other beams using gutter style to minimize the section. Delighting material of the roof and side wall using 4 mm thick float glass.
How to operate the salt spray test chamber