What are the standards that are used for the testing of a gas detector?
In our daily lives, areas such as septic tanks and sewage pipelines are actually filled with toxic and harmful gases. If workers need to work in these areas, they need to use gas detectors. Gas detectors can help our staff check whether the combustible and toxic gases in the work environment exceed the standard value, and also detect whether there is a leakage of combustible and toxic gases in equipment or pipelines. The detected concentration can reach PPM level or even lower. At this point, the detection standards of gas detectors become particularly important. So what are the detection standards for gas detectors?
Appearance and functional inspection
Check the appearance of the gas detector to avoid minor issues during transportation or production assembly. We need to inspect the appearance of the gas detector for defects, cracks, or damage, and check the integrity of the entire gas detector component structure. At the same time, check the machine model, label, manufacturer name, and manufacturing time on the body of the gas detector against the information provided in the manual or manufacturer to ensure accuracy. At the same time, check the explosion-proof mark, measurement license mark, and number of the gas detector, which must be complete and clear. Some documents can be requested from the manufacturer.
Power on inspection
The operation of a gas detector requires a power supply, usually powered by a built-in battery. We need to turn on the switch and check if the gas detector is powered on normally. Some gas detectors can continue to work by replacing the battery, while others are equipped with a charger. For gas detectors equipped with a charger, we need to test if the charger is charging properly. If it is powered on normally, we need to check if the display screen of the gas detector is displaying normally.
Indication error
We purchased a gas detector to detect gas concentration. The display of gas concentration by a gas detector cannot be very accurate, as there is an error. However, this error has a range. If it exceeds this range, it means that the gas detector does not meet the standard. The specified indication error varies for different gases. For example, it is normal for the indication error of oxygen to be within ± 0 and 5% VOL.
Alarm error
As we mentioned above, there is an error in displaying numerical values. Therefore, for the alarm values of gas detectors, there is also a certain allowable error, because the instrument is affected by various factors and it is impossible to alarm at an accurate concentration every time. Therefore, the alarm concentration is allowed to have an error as long as the error is within the standard range. The alarm error varies for different gases, for example, the alarm error for oxygen is within ± 0 and 1% VOL.
