Calibration and Adjustment
What happens if a calibration has failed?
Possible causes for this can be an incorrect test gas or too much or too little test gas during the calibration process. The calibration can be repeated with the correct test gas. It is also possible that the measured value is simply outside the limits. This still has nothing to do with a defect of the device or wrong test gas, but is a normal behaviour. Sensors can wear out over time and in this case the affected sensor must be adjusted.
Another cause may be a defective sensor. The device may need a longer sensor run-in period in clean air or must be returned to the factory for an inspection and, if necessary, repair.What does adjustment mean and what is calibration? What is the difference? What is a bump test? Why do sensors need to be checked regularly? Gas sensors lose sensitivity in the course of their life. Depending on the operating principle, this varies greatly for the respective sensors used. The sensors we use in our measuring devices and how they work are covered in detail in our blog post on sensor principles.
What is a calibration?
The comparison of the measuring device’s display with a known test gas concentration (“sensitivity check”). Calibration of a measuring instrument is about verifying the measurement behaviour in comparison to the normal behaviour. The goal is to determine the deviation of the sensors and to evaluate whether the deviation is still within the limits or whether an adjustment is necessary if the values are outside the limits.
Example with OLLI:
In the menu item “Calibration/Adjustment”, the measuring device can be calibrated for various applications and adjusted if necessary. The correct test gas can be applied to the sensors several times. Calibration can be carried out without entering the password, adjustment is password protected.
Applications and test intervals - Example OLLI
What happens if a calibration has failed?
Possible causes for this can be an incorrect test gas or too much or too little test gas during the calibration process. The calibration can be repeated with the correct test gas. It is also possible that the measured value is simply outside the limits. This still has nothing to do with a defect of the device or wrong test gas, but is a normal behaviour. Sensors can wear out over time and in this case the affected sensor must be adjusted.
