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AW T 2 1 0 | 2 - W I R E C O N D U C T I V I T Y, P H/O R P, P I O N T R A N S M I T T E R | O I/A W T 2 1 0 - E N R E V. C
...12 Calibration
2-electrode conductivity sensor calibration
2-electrode conductivity does not normally require wet
calibration provided that the sensor constant has been entered
correctly and the sensor cable resistance is not significant.
The procedure is for a manual calibration at a single reference
point. Conductivity Calibration and Concentration Calibration
procedures are identical.
For cell constants from 0.003 to 0.054
• If the calibration is performed at a conductivity value
<0.2 µS/cm the PV Offset is recalculated.
• If the calibration is performed at a conductivity value
≥0.2 µS/cm the PV Slope is recalculated.
For cell constants from 0.055 to 0.299
• If the calibration is performed at a conductivity value
<1 µS/cm the PV Offset is recalculated.
• If the calibration is performed at a conductivity value
≥1 µS/cm the PV Slope is recalculated.
For cell constants from 0.3 to 1.999
• If the calibration is performed at a conductivity value
<5 µS/cm the PV Offset is recalculated.
• If the calibration is performed at a conductivity value
≥5 µS/cm the PV Slope is recalculated.
1
Wait for stable reading
Monitor the process value and
continue (
) to the next step once
the value has stabilized.
2
Enter the new value
Enter the desired PV value by
pressing the
key to move the
cursor and the
keys to
change the value. When the new
value has been entered press the
key to continue.
3
Completion
Following a successful calibration
the calculated coefficients are
displayed.
Following an unsuccessful
calibration the reason for failure
is displayed.
–
– – –
Conductivity Cal
PV
752 uS/cm
Continue When Stable
Abort
Continue
–
– – –
Conductivity Cal
PV
752 uS/cm
0
752
New
Continue
Next
–
– – –
Conductivity Cal
PV
752 uS/cm
PV Slope
99.69%
PV Offset
0.00 uS...
Exit
–
– – –
Conductivity Cal
PV
752 uS/cm
Calibration Failed
Offset Too High
Exit
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