KROHNE OPTISENS PAM 2080 EN - Manual (Page 37)

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The current measurement is saved by the converter as “Redox voltage” for the next 2 hours.
Offset calibration must be completed within this period, otherwise the entire process will be
cancelled. The converter will then continue to work with the former calibration data.
Now take a medium sample close to the probe. Determine the concentration of the sample
(laboratory).
The converter continues to work as normal in the meantime.
Enter the determined laboratory value of the sample in the measuring converter as “current
value” ("Calibration – current value").
Then press the Cal button on the converter again in order to continue / complete the calibration.
The symbols “Hold”, “Electrode active”, “Buffer”, “Run time” are displayed.
The “laboratory value” is adopted and a curve adaptation is recalculated by the converter using
the saved internal “Redox value”.
The symbols “Hold”, “Electrode” and “Run time” are displayed.
The symbols disappear after a few seconds and measurement is in the active measuring mode
with new offset of the concentration curve.