Testing standards for VOC gas detectors
1. Inspection of appearance and other items
Checking the appearance is one of the things we need to do after purchasing a gas detector, which is to avoid small problems during transportation or production assembly. We need to check the appearance of the gas detector to see if there are any small problems. If there are defects, cracks, or damage, check the integrity of the entire gas detector component structure.
At the same time, the machine model, label, manufacturer name, factory time, and instructions on the gas detector should be checked one by one to ensure accuracy. At the same time, the explosion-proof status sign, measurement license sign, and number of the gas detector should be checked to ensure completeness and clarity. Some documents may require the manufacturer to provide them.
2. Power on inspection
Generally, it is a built-in battery power supply. We need to turn on the switch to check if the gas detector is powered on properly. Some gas detectors are replaced with batteries to continue working, and some gas detectors are equipped with chargers;
For gas detectors with chargers, we need to test whether the charger is charging correctly. If the power supply is normal, we must check whether the display screen of the gas detector is displaying correctly.
3. Check if the instrument's sound and light alarms are normal
For the sound and light alarm signal gas detector, as it is powered by batteries, it should be able to emit a signal significantly different from the alarm signal sound or light indication signal when under voltage is displayed. The gas detector we purchased is used to detect gas concentration. The gas concentration display of the gas detector cannot be very accurate, it is an error, but this error is a range. If it exceeds this range, it means that the gas detector does not meet the standard, and the display error of different gases is different.
4. Response time
Response time refers to the time required for the gas detector to display a stable value of 0 to 90% of the instrument, which is also standard. This standard is the same as the gas response time for different indication errors and alarm errors.
5. Insulation and withstand voltage
Insulation and withstand voltage have certain insulation resistance standards that must be met for gas detectors. The standard requirements are: room temperature ≥ 100M Ω; After high temperature and humidity: ≥ 1M Ω.
The insulation strength should be able to withstand a 500V AC voltage for 1min, and there should be no discharge or fault phenomena, which comply with the description of this gas detector and the standards.
