1. Clarify the purpose of the test and choose the type of instrument. In short, there are two purposes for the detection of harmful gases. The first is explosion detection and the second is poison detection. The so-called explosion detection is to detect the content of flammable gas in dangerous places, and to exceed the alarm to avoid the occurrence of explosion accidents; poison detection is to detect the content of all poisonous gases in the dangerous field, and to exceed the alarm to avoid poisoning by the staff. The range of explosion detection is 0 ~ 100% LEL, and the range of poison detection is 0 ~ tens (or hundreds) of ppm, which is very different. There are three situations of hazardous gases in hazardous locations,
First, non-toxic (or low-toxic) combustible.
Second, it is non-flammable and toxic.
Third, flammable and toxic. The first two situations are easy to determine. The first explosion test, the second poison test, and the third case if there are personnel exposed to the poison test, if no personnel are exposed, the explosion can be measured. For explosion detection, select a combustible gas detection alarm, and for poison detection, select a toxic gas detection alarm.
2. Choose the type of instrument for clear detection purpose (portable or fixed). Use fixed detection alarms for long-term leak detection in production or storage positions; choose portable (or pocket-type) for other inspection and inspection, emergency detection, entry detection, and tour detection. )instrument. The instrument model contains three main contents: manufacturer, function index and detection principle.
3. Specify the test object, choose the best model, and consider the following principles when choosing the model:
â‘ The manufacturer stresses integrity, good reputation, and the quality of production is guaranteed. It has passed the ISO9002 quality system certification, has a CMC production license issued by the technical supervision department, and has a fire and explosion proof certificate.
â‘¡ The functional indexes of the selected model products should meet the requirements of national standards GB12358-90, GB15322-94, GB16808-1997 and other standards.
â‘¢The detection principle of the instrument should be adapted to the requirements of the detection object and detection environment.
1. Electric lifting coffee table: This coffee table needs manual operation to lift. Lifting is usually done by rotating or stretching a component. The tables are cheap and simple, but they require human operation.
2. Electric lifting coffee table: This coffee table comes with a double motor and two sections of lifting. The coffee table is usually raised and lowered by a button. This kind of end table is more convenient than manual lifting end table, but also more affordable.
3. Smart Lift Coffee Table: This coffee table integrates intelligent technology, which can heat the coffee machine, hot pot and so on through the induction cooker. It can do more, but it's more powerful.
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Suzhou Herstar Medical Technology Co., Ltd. , https://www.hosunherstar.com