Knick Stratos Pro A401B PH, User Manual

Page: 183 / 196

183
Glossary
Slope
Is indicated in % of the theoretical slope
(59.2 mV/pH at 25 °C).
The sensor slope is different for each sensor
and changes with age and wear.
TAN Transaction number for releasing an
additional function.
TTM, Time To
Maintenance
Adaptive maintenance timer. The TTM in-
terval is either read automatically from the
sensor settings or can be specified manually.
After expiration of the interval, the adaptive
maintenance timer issues a Sensoface mes-
sage to remind you to service the sensor
Stressing influences (temperature, measure-
ment in extreme ranges) shorten the timer
interval.
Two-point
calibration
Calibration with which the asymmetry
potential (zero point) and slope are deter-
mined. Two buffer solutions are required for
two-point calibration.
Zero adjustment
Basic adjustment of the ISFET sensor to
ensure reliable Sensoface information.
Zero point See asymmetry potential