Hach-Lange SI794 P User Manual - Manual (Page 93)

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Sensocheck
Continuously monitors the electrodes and wires for short circuits
or open circuits. Critical values make the Sensoface “sad” and the
corresponding icon blinks:
The Sensocheck message is also output as error message Err 33.
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
(Sensocheck must have been activated during configuration.)
The smiley in the display (Sensoface) alerts to electrode problems
(defective sensor, defective cable, maintenance required). The
permitted calibration ranges and the conditions for a friendly,
neutral, or sad Sensoface are summarized in the following table.
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 electrode defect.