Programming Instructions

Programming screen « INSTALLATION » Page 49/74
- Offset (Example pH):
 Displays sensor offset calibration status
 The more the bar graph tend toward red, the more we reach the limit of calibration. This
information can be a sign of ageing of the sensor.
 Offset is expressed in the unit of the physical input of the sensor. The min. and max. values
are different depending on the sensors.
- Slope (Example pH):
 Displays sensor slope calibration status
 The more the bar graph tend toward red, the more we reach the limit of calibration. This
information can be a sign of ageing of the sensor.
 Slope is expressed as a percentage and can vary from0% to 200%. 100% represents a
slope without calibration.
d) Calibration input
- Keyboard that allows you to enter the “real” value you want to use for calibration.
- In the particular case of pH calibration with one/some buffer(s) solution(s), the value of the solution
must be entered. Same applies for ORP.
- This part is also used for pH temperature compensation value in the particular case of pH if necessary.
- Keyboard use is the same as the “standard” numeric keypad.
- If an incorrect value is entered or out of scale, the value entered is displayed in red and the “Save”
button becomes inactive.
Correct value Incorrect value
e) Calibration validation messages
Confirmation message:
 When erasing a confirmation message is displayed before performing the
procedure.
Valid calibration messages:
 Calibration cleared successfully.
Or
 Calibration performed successfully.
Incorrect calibration messages:
 Incorrect offset value.
(Offset overflow allowed for sensor)
Or
 Incorrect slope value.
(Exceeding the allowed slope for the sensor)
Or
 Two points too close.
(2 points of pH calibration are not far enough)
Offset
-60mV
Slope
58%
Confirm the erasure of the
calibration.
NO
YES
Calibration
permformed
with
success
CLOSE (5)
Calibration error !
Incorrect offset value
CLOSE (5)