Knick Stratos Multi E401N - Process Variable ORP Calibration;Adjustment; Calibration Mode: ORP Data Entry; Calibration Mode: ORP Adjustment

Stratos Multi E401N
107
6.3 Process Variable ORP Calibration/Adjustment
Note: During calibration, the function check (HOLD) operating state is active for each of the calibrated
measuring channels. The outputs respond as configured.
• Calibration: Detect deviations without readjustment of calibration data
• Adjustment: Detect deviations with readjustment of calibration data
NOTICE! When using analog sensors, adjustment is required following sensor replacement.
Calibration/Adjustment Methods
• ORP data entry
• ORP adjustment
• ORP check
• Temperature probe adjustment
6.3.1 Calibration Mode: ORP Data Entry
Calibration by entering the ORP offset of a premeasured sensor.
Calibration Procedure
Calibration

[I] [II] [ORP Sensor]
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 “ORP 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 ORP offset value.
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.
6.3.2 Calibration Mode: ORP Adjustment
The sensor is immersed in an ORP buffer solution for ORP adjustment. Stratos Multi displays the
measured temperature and the ORP. The temperature-corrected buffer values must then be manually
entered. For this purpose, take the buffer value that goes with the displayed temperature from the
buffer table (e.g. on the bottle). Intermediate values must be interpolated. All calibration data are
converted to a reference temperature of 25°C/77°F.
Calibration Procedure
Calibration

[I] [II] [ORP Sensor]
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 ORP Adjustment calibration mode and press enter to confirm.
02. Continue with the right softkey: Next.
03. 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.