Stratos Multi E401N
105
6.2.7 Calibration Mode: Data Entry
Calibration by entering the calibration values for the zero point and the slope of a premeasured
sensor.
Calibration Procedure
Calibration
[I] [II] … pH
When you access calibration, the calibration values selected in the calibration presettings are used.
These settings can still be changed in the Calibration menu. If you do not want to perform calibration,
use the left
softkey
to go back one level and abort the calibration.
01.
Select “Data Entry” calibration mode and press
enter
to confirm.
02.
Remove the sensor and install the premeasured sensor.
03.
Continue with the
right softkey: Next
.
04.
Enter the zero point and slope measured values.
Result
✔
By pressing the
right softkey: Adjust
, the calibration values obtained during calibration for
calculation of the process variables are applied to the device. When using a Memosens sensors,
the calibration values are saved in the sensor.
6.2.8 ISFET Zero Point Calibration Mode
Setting the ISFET Operating Point
When using Memosens ISFET sensors for pH measurement, the individual operating point of
the sensor first needs to be determined, and should be in the pH 6.5...pH 7.5 range. The sensor is
immersed in a buffer solution with a pH value of 7.00 for this purpose.
Calibration Procedure
Calibration
[I] [II] … pH-ISFET
When you access calibration, the calibration values selected in the calibration presettings are used.
These settings can still be changed in the Calibration menu. If you do not want to perform calibration,
use the left
softkey
to go back one level and abort the calibration.
01.
Select the “ISFET Zero Point” calibration mode for setting the operating point for the first sensor
calibration.
02.
Press the
right softkey: Next
.
03.
Adjust the buffer value if necessary: Default pH 7.00
04.
Take the sensor out of the medium and rinse it well in deionized water.
CAUTION! Risk of electrostatic discharge.
Do not wipe the sensor or dab it dry.
05.
Immerse the sensor in buffer solution.
06.
Start calibration with the
right softkey: Next
.
✓
The ISFET operating point is calculated.
07.
Finally, confirm the ISFET operating point with the
right softkey: Adjust
.
A pH calibration, e.g. Calimatic 2-point calibration, can be performed afterward.
Note:
The operating point only needs to be determined once for each ISFET sensor.