Hach-Lange SI794 I User Manual - Manual (Page 100)

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Sensocheck
Continuously monitors the primary coil and its lines for short
circuits and the secondary coil and its lines for open circuits.
Sensocheck can be switched off. Critical values make the
Sensoface “sad” and the corresponding Sensocheck icon blinks:
Sensocheck messages are also output as error messages Err 33
or Err 34. The alarm contact is active, the red LED is lit, output
current 1 is set to 22 mA (when configured correspondingly).
Sensocheck can be switched off during configuration (then
Sensoface is also disabled).
Exception:
After a calibration a smiley is always displayed for confirmation.
Sensoface
The smiley in the display (Sensoface) alerts to sensor problems
(defective sensor, defective cable). The conditions for a friendly,
neutral, or sad Sensoface are summarized in the following chart.
Additional icons refer to the error cause.
Note
The worsening of a Sensoface criterion leads to the devaluation
of the Sensoface indicator (Smiley becomes “sad”).
An improvement of the Sensoface indicator can only take place
after calibration or removal of the sensor defect.