Hach-Lange SI794 P User Manual - Manual (Page 94)

94
Status Display Problem
Offset and
slope
Offset (zero point) and slope of the
electrode are still okay,
however, the electrode should be
replaced soon.
Offset and slope of the electrode
have reached values which no longer
ensure proper calibration.
Replace the electrode.
Calibration
timer
Over 80 % of the calibration interval
has already past.
The calibration interval has been
exceeded.
Electrode
defect
Check the electrode and its
connections
(see also error messages
Err 33 and Err 34).