Do I have to zero the gas detector every time I turn on it?
1. Confirm the battery level
2. Zero adjustment
3. Air test
4. Clear peaks
Whether zero adjustment is required or not, there are the following points to note:
1) The key to air zeroing is knowing that you are in clean air. You should not zero an instrument unless you know you are in a clean air environment. Zeroing an instrument in a polluted atmosphere can confuse readings and may even obscure readings of concentrations of potentially hazardous gases.
2) If zeroing, but the surrounding environment is near a fire or smoky place, there is no clean air, you should use zero air (compressed air to remove impurities) to establish a standard for your detector. Zero air will not damage your detector or interfere with sensor functionality.
In an unclean air environment, if the instrument is turned on, the combustible gas and other gas sensor readings are 000, and the oxygen sensor reading is 20.9, then what is the purpose of zeroing the gas detector? Assuming your gas detector isn't intentionally masking negative readings (which Industrial Scientific instruments don't), zeroing at this point is no good. So, if you turn on your instrument and the readings are normal or within your acceptable range, don't waste time going through the zeroing process.
