Novasina LabTouch-aw Operating Instructions Manual
Also see for LabTouch-aw: Operating instructions
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Contents
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27Englishwww.novasina.com8.5. Deleting Calibration PointsNote that a deletion of one calibration point just deletes the stored value, notthe point itself. Thus, if the respective SAL-T standard is placed into the mea-surement chamber, the system recognizes the point again. This procedureis normally not required but makes sense if one of the following situations ispresent or happened:• If there is a requirement to calibrate a sensor completely. It is then usefulto delete the stored calibration points to see the ones which had beenalready calibrated during this run, otherwise, "cal" is still displayed behindevery calibrated value.• If a complete calibration is required but you do not have all of the suppliedSAL-T standards available. Keep in mind that a deleted point is muchbetter than one calibrated the wrong way. The LabTouch-aw calculatesthe missing point from the two nearest ones (mostly one above and onebelow of the deleted point).8.5.1 Perform a Deletion of a Cal Point• Go to "Chamber settings" -> "Sensor calibration..." -> "Clear calibrationpoint". A list with all calibrated points is displayed.• Select the point to be deleted and confirm the request with [Yes].Note:At the end of the list (move down by using the arrow down key), there is theoption to clear all points at once ("Clear all cal. points").• You will be asked to enter the sensor password if one is set.• Afterwards, "Clear cal. point successful" confirms the deletion .8.6 Display Cal PointsGo to "Chamber settings" -> "Sensor calibration..." -> "Info calibration points"and select the requested calibration point. The following information is dis-played. Important: Please provide this information as well if you ask Novasinato support a calibration problem.• "Last calibration "Date and time of the last save or deletion of a cal. point.• "Instrument "Instrument and serial number of the same which had been used forcalibration / deletion.• "Reference value "Reference value including temperature consideration.• "Correction value "Correction of a cal. point, compared to the unchangeable baseline of thesensor.• "Temperature "Temperature at which the calibration had been performed.Note:A sensor drift by time can easily be detected if the correction value is alwaysnoted while calibrating the sensor. The absolute amount of this value doesnot say anything about the quality of the sensor! |
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