Introduction to whether zero adjustment is needed when turning on a gas detector
Is it necessary to "zero" the portable gas detector every time it is turned on and used. This is actually a good question, so what exactly is the process of zeroing? As a standard procedure, perform four basic steps in clean air every time the instrument is turned on.
1. Confirm battery level
2. Zero adjustment
3. Ventilation test
4. Clear peak value
Is it necessary to zero? There are several points to note:
1) The key to air zeroing is to know that you are in clean air. You should not zero the instrument unless you know you are in a clean air environment. Zeroing the instrument in the polluted atmosphere may lead to confusion of readings, and may even mask the readings of potentially dangerous gas concentrations.
2) If zero adjustment is necessary, but the surrounding environment is near a fire or a place with smoke, and there is no clean air, you should use zero air (compressed air that removes impurities) to establish a standard for your detector. Zero air will not damage the functionality of your detector or interfere with the sensor.
In an unclean air environment, if the instrument is turned on and the combustible and toxic gas sensors read 000, and the oxygen sensor reads
20.9, what is the purpose of zeroing the gas detector? Assuming your gas detector did not intentionally mask negative readings, zeroing at this point is not beneficial. So, if you turn on your instrument and the reading is normal or within your acceptable range, there is no need to waste time completing the zeroing process. You won't become better or safer because of this.
