YYT-T453 Protective Clothing Acid And Alkali Resistance Test System Operation Manual
This instrument is used to test the hydrostatic pressure resistance of fabric protective clothing for acid and alkali chemicals. The hydrostatic pressure value of the fabric is used to express the resistance of the reagent through the fabric.
1. Liquid adding barrel
2. Sample clamp device
3. Liquid drain needle valve
4. Waste liquid recovery beaker
Appendix E of "GB 24540-2009 Protective Clothing Acid-base Chemical Protective Clothing"
1. Test accuracy: 1Pa
2. Test range: 0～30KPa
3. Specimen specification: Φ32mm
4. Power supply: AC220V 50Hz 50W
1. Sampling: Take 3 samples from the finished protective clothing, the sample size is φ32mm.
2. Check whether the switch status and the valve status are normal: the power switch and the pressure switch are in the off state; the pressure regulating valve is turned to the right to the completely off state; the drain valve is in the closed state.
3. Open the lid of the filling bucket and the lid of the sample holder. Turn on the power switch.
4. Pour the pre-prepared reagent (80% sulfuric acid or 30% sodium hydroxide) slowly into the liquid adding barrel until the reagent appears at the sample holder. The reagent in the barrel must not exceed the liquid adding barrel. Two stomata. Tighten the lid of the refill tank.
5. Turn on the pressure switch. Slowly adjust the pressure regulating valve so that the liquid level at the sample holder rises slowly until the top surface of the sample holder is level. Then clamp the prepared sample on the sample holder. Take care to ensure that the surface of the sample is in contact with the reagent. When clamping, ensure that the reagent will not penetrate the sample due to pressure before the test starts.
6. Clear the instrument: In the display mode, there is no key operation, if the input is a zero signal, press «/Rst for more than 2 seconds to clear the zero point. At this time, the display is 0, that is, the initial reading of the instrument can be cleared.
7. Slowly adjust the pressure regulating valve, pressurize the sample slowly, continuously, and steadily, observe the sample at the same time, and record the hydrostatic pressure value when the third drop on the sample appears.
8. Each sample should be tested 3 times, and the arithmetic average value should be taken to obtain the hydrostatic pressure resistance value of the sample.
9. Turn off the pressure switch. Close the pressure regulating valve (turn to the right to fully close). Remove the tested sample.
10. Then do the test of the second sample.
11. If you do not continue to do the test, you need to open the lid of the dosing bucket, open the needle valve for draining, completely drain the reagent, and repeatedly flush the pipeline with the cleaning agent. It is forbidden to leave the reagent residue in the dosing bucket for a long time. Sample clamp device and pipeline.
1. Both acid and alkali are corrosive. Test personnel should wear acid/alkali-proof gloves to avoid personal injury.
2. If something unexpected happens during the test, please turn off the power of the instrument in time, and then turn it on again after clearing the fault.
3. When the instrument is not used for a long time or the reagent type is changed, the pipeline cleaning operation must be performed! It is best to repeat cleaning with a cleaning agent to thoroughly clean the dosing barrel, sample holder and pipeline.
4. It is strictly forbidden to open the pressure switch for a long time.
5. The power supply of the instrument should be reliably grounded!
| NO. | Packing content | Unit | Configuration | Remarks |
| 1 | Host | 1 set | □ | |
| 2 | Beaker | 1 Pieces | □ | 200ml |
| 3 | Sample holder device (including sealing ring) | 1 set | □ | Installed |
| 4 | Filling tank (including sealing ring) | 1 Pieces | □ | Installed |
| 5 | user's Guide | 1 | □ | |
| 6 | Packing List | 1 | □ | |
| 7 | Certificate of conformity | 1 | □ |
