Knick Stratos Multi E401N - Calibration Mode: Zero Point

Stratos Multi E401N
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6.6.6 Calibration Mode: Zero Point
Zero Correction
For trace measurements below 500 ppb, the zero point should be calibrated. (TAN option FW-E015,
“Oxygen Measurement in Low Oxygen Concentrations”)
If a zero correction is performed, the sensor should remain for at least 10 to 60 minutes in the
calibration medium (media containing CO
2
: at least 120min) to obtain stable, non-drifting values.
During zero correction, a drift check is not performed.
Calibration Procedure
Calibration

[I] [II] … Oxy
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 “Zero Point” calibration mode.
02. Press the right softkey: Next.
✓ Zero point correction is carried out. The measured sensor current is displayed.
03. Enter the input current for the zero point.
04. Press the right softkey: Next.
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.