Calibrating a surface measuring instrument
“The measurements you take are always out, you just need to know by how much.” There is a lot of truth in these words from Dave Packard, the co-founder of Hewlett-Packard. And, in order to know how accurate (or how inaccurate) your measurements are, a surface temperature meter also needs to be calibrated regularly. This is the only way to ensure that the measurement carried out with it has really been accurately performed.
Calibration: The recording and documentation of the deviation of a measuring instrument from another instrument under prescribed conditions. This instrument is described as the standard. Calibration includes the documentation of the deviation, calculation of the measurement uncertainty and creation of the certificate. Calibration allows conclusions to be drawn on the instrument's past. To clearly indicate the status of a measuring instrument, it must be given a calibration mark.
Adjustment:Setting a measuring instrument to the smallest possible deviation from the correct value. When it comes to adjustment, an intervention on the measuring instrument is necessary.
Traceability means relating measurement results to national or international standards through an unbroken chain of calibrations.
A standard is a metrological comparison object, a comparison material or a precise measuring instrument for the calibration of other measuring instruments. Standards have often been around for a very long time, such as the measures of capacity from Pompeii.