Stratos Multi E401N
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6.5.2 Calibration/Adjustment Methods
• Automatic: Automatic with standard calibration solution
• Manual: Manual entry of a calibration solution
• Product: Product calibration (calibration with sampling)
• Zero point: Zero point correction
• Installation factor: Entry of an installation factor (with Memosens sensors)
• Data entry: Data entry of premeasured sensors
• Temperature: Temperature probe adjustment
6.5.3 Calibration Mode: Automatic
Automatic Calibration with Standard Calibration Solution
During automatic calibration:, the conductivity sensor is immersed in a standard calibration solution
(NaCl or KCl, set during parameter setting). On the basis of the measured conductance and
temperature, Stratos Multi
automatically calculates the cell factor. The temperature dependence of the
calibration solution is accounted for.
Notes on Calibration
• Use only fresh calibration solutions. The used calibration solution must be configured.
• The accuracy of the calibration is crucially dependent on a precise acquisition of the calibration so-
lution temperature. On the basis of the measured or entered temperature, Stratos Multi
calculates
the setpoint of the calibration solution from a stored table.
• Note the response time of the temperature probe.
• To determine the exact cell factor, wait for temperature equalization of the temperature probe and
calibration solution before calibration.
Note: Note during calibration: If the measured conductance or temperature fluctuate greatly, the cali-
bration procedure is aborted after approx. 2min. Repeat calibration if an error message appears.
Calibration Procedure
Calibration
[I] [II] … Condl
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 “Automatic” calibration mode and press enter to confirm.
✓ Display of calibration solution as configured in Cal Presettings .
02. Change the calibration solution, if required.
03. Take the sensor out of the medium, rinse it well in deionized water, and dry it.
04. Immerse the sensor in the calibration solution.
05. Start calibration with the right softkey: Next.
✓ Calibration is performed.
The following parameters are displayed: Calibration temperature, solution table value
(conductivity depending on calibration temperature), and response time.
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.
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