3. SPAN ERROR: This means that your span gas value is lower then zero gas value or that the detector signal during calibration is lower than actual zero gas.
ZERO ERROR: This means that your zero gas value is higher then span gas value or that the detector signal during calibration is higher than actual span gas. ZERO ERROR(零位错误):这意谓着你的零位值较高,量程气值或者校验期间检测器信号比实际量程值高。
SPAN ERROR: This means that your span gas value is lower then zero gas value or that the detector signal during calibration is lower than actual zero gas.