How to use and operate the salt spray test machine

Dongguan Zhongzhi Times Testing Equipment Co., Ltd.

The instructions and operating procedures for the salt spray tester are as follows:

1. Pre-test Preparation:

• Equipment Inspection and Connection:
• Check that the power supply (220V) is properly plugged in to ensure proper power supply. Also, connect the external 8-inch air hose to the air inlet on the rear of the machine and ensure the air supply is properly connected and open.
• Check that the drain valve is closed and the exhaust pipe is properly connected to the outside or sewer pipe. The rear of the machine should be 10 cm away from the wall, with maintenance space on both sides. It is recommended to use a 1/2-inch PVC rigid pipe for the drain, and the water pipe should be lower than the drain outlet. The exhaust pipe should be a 2 1/2-inch PVC rigid pipe, extending to the outside. Ensure that it is installed parallel to the machine and downward.
• Water Adding Operation:
• Adding Water to the Test Chamber: If the water supply is properly connected, open the water supply valve and press the “Power” button. The device will automatically add water to the test chamber until the “Low Water Level” light on the control panel turns off (this light corresponds to the test chamber water level). If the water supply is not connected, press the “Power” button and manually add tap water to the test chamber until the “Low Water Level” light turns off.
• Adding Water to the Pressure Tank: If the water supply is properly connected and the water supply valve is open, press the “Power” button and the device will automatically add water to the pressure tank (the water added to the pressure tank will undergo a filter) until the “Low Water Level” light on the control panel turns off (this light corresponds to the test chamber water level). When using the pressure tank for the first time or refilling it after emptying it, add purified water to the pressure tank through the “Manual Water Add” function after the low water level light turns off. If the water supply is not connected, press the “Power” button, open the red valve at the “Manual Water Filling Area for Pressure Tanks,” and manually pour purified water into the pressure tank. After the “Low Water Level” light on the control panel goes out, add another 1500ml of water, then close the valve.
• Adding Solution:
• Prepare a 5% sodium chloride solution with a salt-to-water ratio of 5:100 (for example, use 4750ml of purified water to 250g of sodium chloride). Pour the prepared solution into the salt solution refill tank (located above the right side of the salt spray tester’s control panel, marked “Test Solution Inlet”) until the “Low Salt Water” light goes out.
• Specimen Placement:
• Place the specimen correctly in the test chamber, with the test surface facing up. Position it at an angle according to the required standard. For example, a standard specimen (130×70mm) can be tilted at a 15-30 degree angle. Ensure that the specimens do not come into contact with each other, metallic conductors, capillary materials, or other supporting structures. Specimen identification marks or labels should be placed underneath.

1. Test Operation:

• Water Seal Operation: Fill the sealing water tank to the level of the pad to create a water seal that isolates the test chamber.
• Temperature Setting: Set the temperature according to the test requirements. Generally, the test chamber temperature for neutral salt spray tests is 35°C, and the saturated air chamber temperature is 47°C. The temperature settings for acid salt spray tests and copper-accelerated acetic acid salt spray tests vary.
• Time Setting: Set the test time on the timer in hours (h), minutes (m), and seconds (s).
• Start Test: Press the “Spray” and “Timer” buttons to begin the test.

1. Precautions During the Test:

• If the test time is set to a long time, frequently check whether the solution in the pressure tank and brine tank is low and add appropriate solution immediately.
• If you need to inspect the finished product during the test, press the defogger switch to quickly expel the mist outside. However, the defogger function should not be used during normal operation.

1. Post-Test Procedure:

• Turn off the “Timer,” “Spray,” “Operation,” and “Power” buttons in sequence.
• If the salt spray machine is not used for an extended period, clean the salt solution in the machine and the water in the test chamber.