Hach-Lange SI794 D tr User Manual - Manual (Page 69)

Display Action Remark
Enter default for concentration
(Select position using
,
edit number using ,
press enter to confirm.)
Display of new slope and
zero point (related to 25 °C at
1013 mbars).
Press enter to end
concentration calibration.
The default value
is calculated from
rel. humidity,
cal pressure, and
cal temperature.
(the unit of
measurement,
ppm or mg/L, ... ,
is preset during
configuration.)
Place sensor in process
The new value is shown in the
main display alternately with
“Hold”; “enter” blinks.
Press enter to exit calibration.
After end of
calibration, the out-
puts remain in Hold
mode for approx.
20 sec.
New calibration:
Press cal key.
Information on concentration calibration (Conc)
Calibration in air. This calibration method is recommended when the sensor can be
removed for calibration. Air has a stable oxygen content. Therefore the adjustment
processes during calibration run more quickly.
For 2-point calibration, perform zero calibration first.
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