Газ детектори можуть допомога наш персонал до перевірити чи не є легкозаймисті і токсичні гази в робоче навколишнє середовище перевищення стандарт значення, і банк також виявляти чи легкозаймисті та токсичні гази в обладнання або трубопроводи є витоки. the виявлена концентрація can reach the PPM level or even lower. Then What are the detection standards for gas detectors?
1. Перевірка вигляд та інше елементи
Перевірка зовнішній вигляд є перший річ ми do після закупівлі газ детектор. це є до уникнути незначних проблем in the перевезення or or збірка процес of the газ детектор. We need to check wheer the зовнішній вигляд of the gas detector is flawed, cracked or harmd. , Check the entire structure of the the gas detector is complete.
At the same time, check the machine model, label, manufacturer name, and delivery time on the gas detector body and check with the manual or the information given by the manufacturer to ensure accuracy. At the same time, check the explosion-proof mark, measurement license mark and The number and other contents must be complete and clear, and some certificates can be provided by the manufacturer;
2. Power-on inspection
The gas detector needs a power supply to work, and it is usually powered by a built-in battery. We need to turn on the switch to check whether the gas detector is powered on normally. Some gas detectors continue to work by replacing the battery, and some gas detectors The detector is equipped with a charger. For a gas detector equipped with a charger, we need to test whether the charger is charged normally. When the power is normal, we need to check whether the display screen of the gas detector is normal;
3. Check whether the sound and light alarm of the instrument is normal
For gas detectors with sound and light alarm signals, тому що вони є живлення by batteries, when the undervoltage is displayed, they should be able to send out sound or light indication signals that are clearly different from the alarm signal;
Індикація помилка
The gas detector we bought is used to detect the gas concentration. the gas detector cannot be very accurate in displaying the gas concentration. It has errors, but this error has a range. If it exceeds this range, it will be It shows that this gas detector does not meet the standard, and the indication error specified by it is different for different gases. for example, it is normal for the індикація помилка of oxygen to be within ±0.5 percent VOL;
Тривога помилка
We згаданий the error of the displayed value above, so there is a certain allowable error for the alarm value of the gas detector, тому що the instrument will be affected by various factors, it is impossible to alarm at an accurate concentration every time, Тому, the концентрація of the alarm is allowed to have errors, as long as the error is within the standard range, the alarm error is different for different gases, for example, the alarm error of oxygen is within ±0.1 percent VOL;
Відповідь час
Response time refers to the time required for the indication value of the gas detector to rise from zero to 90 percent of the stable indication value that the instrument should reach. This time is also required by the standard. This standard is the same as the indication error and the alarm error. The response time of different gases is different, for example, the response time for oxygen is less than or equal до 20S;
Діелектрик витримка напруга
For gas detectors, there are some ізоляція витримувати напруга стандарти that must be met. the standard requirements are Greater than or equal to 100MΩ at room temperature and Greater than or equal to 1MΩ after damp heat. The ізоляція міцність повинен бути able to витримувати 500V AC voltage for lmin, and discharge and breakdown should not happen. These Only after they are met can it be said that the газ детектор відповідає стандарт.
