At times we are only concerned about the methane reading and don't read pressure. To have a 0 show up in the field is an issue. For us a zero is an indication that we read the pressure and that it was a zero. A null is an indication that the pressure was not read/recorded.
At times we are only concerned about the methane reading and don't read pressure. To have a 0 show up in the field is an issue. For us a zero is an indication that we read the pressure and that it was a zero. A null is an indication that the pressure was not read/recorded.