How to install and debug the geosynthetic material anti-seepage instrument? -Huaqiang Electronic Network

Brand AVX TPSE226M035R0125 Low impedance tantalum capacitor AVX 22

Adjustable capacitor Murata genuine original

Test - lowercase jpg

Kaixin micro test

Test probe P100-M3

How to install and commission the geosynthetic impermeability meter?

Installation and usage instructions:

1. Pressure setting: After turning on the power, press the "Back" button to enter the settings. Use the "Shift" key ">>" to navigate, then use the "+" and "--" keys to adjust the pressure value. Once set, press "Back" to confirm. After adjusting the lower limit, press the "Set" key to exit. The lower limit for 8 hours is set to 0.1MPa.

Time reset: To restart the experiment, keep pressing the "--" key without releasing it. After 10 seconds, the time will reset to 0 hours. Be careful not to press "!" by mistake.

2. Time review: Press the "--" key to switch to hour display. The upper limit shows minutes, and the lower limit shows seconds. After 30 seconds, it automatically returns to the pressure display.

3. Zero adjustment: If there is no pressure after starting, and the reading doesn’t return to zero, press the "Set" key once to reset to zero. Avoid pressing the clear button when pressure is applied; instead, release the pressure first and then reset to zero.

4. Open the water injection cover and fill with distilled water. When the tank is full, start the pressure pump and open the pressure regulating valve so that water flows into the high-pressure chamber until it just overflows.

5. Place the sample on the mesh in the sump, ensuring no wrinkles or excess water. Remove any air bubbles from the clamp. Cover the porous plate and evenly clamp the sample.

Note: For composite specimens made of textile materials and membranes, one side of the membrane should face the water surface. For specimens with textiles on both sides and a membrane in the middle, the sample can be clamped on the water-facing side. Carefully peel off part of the textile material and apply an adhesive like glass glue to the gripping area to prevent water leakage.

6. Slowly adjust the inlet valve to increase the pressure in the clamp to 0.1 MPa. If you know the approximate hydrostatic resistance range, you can directly set the pressure to the lower end of the range and begin testing. Maintain this pressure for at least 1 hour and observe if water seeps through the porous plate. If no water permeates, gradually increase the pressure in 0.1 MPa increments, keeping each stage for at least 1 hour. If water appears, it indicates the presence of holes or cracks in the sample. The hydrostatic pressure resistance is accurate to 0.1 MPa.

7. If using the device specified in GB/T 19979.2, check the seepage flow rate. If the flow rate is very low under a certain hydraulic pressure, it can be considered that there is no seepage. However, if the flow increases rapidly, it suggests the sample has leaks or damage, and the test should stop.

Note: If there's a droplet in the hole of the porous plate, and no seepage occurs after wiping it, it may be due to edge overflow, and the test can continue. If water still seeps out after wiping, the sample is leaking, and the test should stop. If you only need to determine whether the sample meets a specific hydrostatic pressure requirement, you can directly pressurize to that level for at least 1 hour. If no seepage occurs, it meets the standard. The remaining samples are tested accordingly. If the three values differ significantly (more than 50% between the lowest two), additional tests may be required.

8. The lowest hydrostatic pressure value from the three samples is taken as the sample’s resistance value. If the measured value exceeds 3, take the average of the two lowest values. If one value is more than 50% lower than the other, discard it.

9. Calculate the results according to relevant standards.