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6.3 Sensor Health Indicator
Based on the necessary correction (current value compared to the factory calib-
ration value) at a calibration point, a sensor health (100% to 0%) is calculated.
A calibration point can not be calibrated anymore, if sensor health is down to
0%.
If sensor health is below a certain threshold value, which is individual for each
calibration point, a warning message is displayed. This message includes the
hint, that sensor is close to end of lifetime and cannot be calibrated soon. In this
case, please contact your local Novasina agent to order a new sensor for replace-
ment.
Note:
For the mentioned warning message, the calibration point with the worst
sensor health is always considered. This calibration point is also listed in „Cham-
ber settings“ -> „Chamber info“ under entry „Worst Health“
Important!
The displayed sensor health in the submenu „Information Calibration“ at the re-
spective calibration point is only brought up to date once a calibration had been
performed at that point. In case of a verification, sensor health will be simulated
and displayed after the process but not stored on the sensor and thereby the
Information Calibration“ submenu is not updated.
6.3.1 Sensor Exhausted Warning
This warning is issued in case of an exhausted sensor
•
After completion of a calibration
•
After completion of a verification
In addition, a „Sensor nearly exhausted“ message is diplayed in red color in the
status bar.
Hints:
•
The „health“ of a sensor which was contaminated by volatiles can get better
if the contaminants outgass from it, thus provide less influence to sensor
drift.
• A bad sensor health does not mean that mesurement results become less
accurate. Moreover, it provides conclusion if a sensor has to be changed
soon or needs to be potected from volatiles by installing a chemical protec-
tion filter.
•
If sensor health is reduced dramatically within a few weeks, the use of che-
mical protection filter must be considered as the drop in health results from
chemical contamination of the sensor by volatiles.
