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8.11.18 Calibrating a pH or redox sensor
Refer to section 8.9 to access the "Calibration" menu.
Calibration
Mx:pH/ORP
Auto. pH calib.
Calib. interval
Man. pH calib.
1st point
2nd point?
Rinsing
2nd point
pH calib. result
YES
NO
pH calib. data
Last
Isoth. potential
VALUE
Isoth. potential
Zero
ENTERING
Slope
ENTERING
Iso pH
ENTERING
ENTERING
ORP calibration
1st point
Calib. result ORP
ORP calib. data
Offset
ENTERING
Interval
Calib. log
READING
ENTERING
→
Use one of the following 3 methods to calibrate a pH sensor:
•
PH AUTO CALIBRATION
: Automatically calibrate the pH sensor; first choose the buffer solution used in the
menu "Parameters -> Mx:pH/ORP -> Buffer". The 8619 automatically recognises the pH of the solution used:
When a sensor is calibrated automatically, the most recent calibration date is updated (function "LAST" in the
submenu "CALIBRATION INTERVAL" below).
•
PH MANUAL CALIBRATION
: Calibrate the pH sensor using a 1- or 2-point procedure. See details on the
following pages. When a sensor is calibrated manually, the most recent calibration date is updated (function
"LAST" in the submenu "CALIBRATION INTERVAL" below).
•
PH CALIBRATION DATA
: Enter the zero values and the slope indicated on the certificate for the pH sensor,
if provided. Always enter a negative value for the slope, even if the value given on the certificate is a positive
value. This entry does not update the most recent calibration date (function "LAST" in the sub-menu "CALI-
BRATION INTERVAL" below).
→
Use one of the following 2 methods to calibrate a redox sensor:
•
ORP CALIBRATION
: Manually calibrating the redox sensor using the 1-point method See details on the fol-
lowing pages.
•
ORP CALIBRATION DATA
: Enter the offset value indicated on the certificate for the redox sensor, if provided.
CALIBRATION INTERVAL
: Read the date of the most recent manual or automatic calibration and enter the perio-
dicity of calibration, in days: each time a calibration is due, the 8619 generates a "maintenance" event, signalled on
the display by the icon , and a "warning" event, signalled on the display by the icon
. Configure "0000 days"
in order not to use the function.
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Adjustmentandcommissioning
Type 8619
English
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