Metrohm 900 Touch Control Manual - Manual (Page 91)

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10 Sensors
900 Touch Control
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10.5 Limit values for the calibration data
Sensor: Edit ▶ Limit values
You can define the following limit values in the dialog Edit sensor /
Limit values:
￭ Slope (pH and ion-selective electrodes)
￭ Electrode zero point (pH and ion-selective electrodes)
￭ Cell constant (conductivity measuring cells)
These values are monitored during the calibration. If these limits are
infringed, then a message will be displayed and you can decide whether
to accept the calibration data or not.
Monitoring slope
on | off (Default value: off)
If this parameter is activated, then the slope will be monitored.
Lower limit
pH electrodes:
Input range
–999.9 - 999.9 %
Default value 96.0 %
ISE electrodes:
Input range
–999.9 - 999.9 mV
The default value depends on the charge of the ion:
–25.0 mV (–2), –55.0 mV (–1), 55.0 mV (+1), 25.0
mV (+2).