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Verification regulations for sand and dust test chambers
Verification regulations for sand and dust test chambers
Product details
There are strict requirements for the use of sand and dust test chambers, so when laboratory personnel conduct product testing, we need to establish a series of calibration procedures. This is not only for the safety of employees, but also provides a guarantee for the product quality of the enterprise. Next, we will bring you a detailed maintenance and calibration process.
The verification regulations for sand and dust test chambers require that the environmental conditions meet the temperature, humidity, and other requirements of the laboratory. If calibration and verification are carried out on site, the environmental conditions should be based on the conditions that can meet the on-site use of the instrument.
(2) Although personnel calibration is different from verification, the personnel conducting calibration should also undergo effective assessment and obtain corresponding qualification certificates. Only certified personnel can issue calibration certificates and reports, and only such certificates and reports are considered valid.
Verification regulation process:
1. Check and ensure that there are no debris inside the sand and dust test chamber, especially under the mesh. Remove the mesh and the small door at the bottom of the funnel for ash discharge. Use compressed air to blow down from the inside of the chamber to remove as much debris as possible, and then close the small door for ash discharge;
2. Install the hole mesh from the box, run it empty first, check the equipment control part: turn on the power switch, set the controller parameters (see next page for specific settings); After clicking 'Run', gradually open various functions and check the operation status of the equipment; Shut down after confirming that all functions are normal;
3. Add dust into the box at a rate of 2kg/m ³;
4. The sample is fixed on the sample rack according to regulations;
5. If the sample needs to be powered on, connect the power supply in advance;
6. Turn on the power switch and start the experiment. After the experiment is completed, take out the sample and remove the sieve. Take out the dust from the bottom outlet and dry it for storage. Close the door.
Let's learn more about the structure of the sand and dust test chamber machine, so that we can clearly indicate maintenance and inspection.
2. The inner liner material is made of high-quality stainless steel plate, designed to be a sealed space for placing samples for shell sealing tests during operation. The indoor sample rack and other accessories are made of stainless steel plate, designed reasonably and durable;
3. There is a large observation window on the box door, which allows for clear observation of the indoor testing conditions during the test, and the sample is clearly visible. The box door adopts silicone sealing strip, which is tightly sealed and easy to open and close;
4. The equipment has a vertical circulation airflow carrying dust, with talc powder as the dust. The dust is blown into the circulating air duct through the fan at the bottom of the funnel, and then evenly diffused by the air outlet guide plate on the upper part of the equipment. With the help of the circulating airflow, the dust can be uniformly suspended in the sand and dust test chamber. The amount of talc powder used is 2kg per cubic meter of the test chamber volume, and the number of uses does not exceed 20 times;
5. The equipment is equipped with a set of vacuum flow meters and vacuum gauges, and the customer provides a vacuum pump according to the sample to ensure a negative pressure of 2kpa (20mbar) inside the sample shell to meet the needs of the test;
6. There is a dust replaceable device at the bottom of the equipment, which can easily replace the used dust;
To ensure that dust does not stick to the walls of the box.
When formulating the calibration regulations for sand and dust test chambers, the main purpose is to ensure the safety of operators, and the correct operation method can also ensure that the test results do not have errors. Therefore, everyone must pay attention before use. Perhaps it will become a category of areas with lower risk. And it has low power consumption, long lifespan, and can be used in various harsh conditions. We can use a multimeter in the "× 10k" range to check the two leads of the probe, which should be infinite. If there is resistance, the performance of the probe will decrease; If it is below tens of kiloohms, the probe will be damaged. It is impossible for any device to fail during use. Once a problem occurs, users can enjoy timely maintenance services or provide corresponding measures based on the device's own problems.
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