2-Electrode Conductivity, Resistivity Or; Concentration Calibration - ABB AWT420 Operating Instruction

56 AW T4 2 0 | U N I V E R S A L 4 - W I R E , D U A L- I N P U T T R A N S M I T T E R | O I/A W T4 2 0 - E N R E V. B
...15 Calibration procedures
2-electrode conductivity, resistivity or concentration calibration
Once the sensor has been installed and has reached the
temperature of the process solution, verify the process variable
value using a grab sample and an external validation device
having the same type of temperature compensation.
1 At the Calibrate level, press the
The Calibrate menu is displayed:
Calibrate
S1 : TC
Hold Outputs
Exit
2 Use the
/ keys to select S1 : TC and
press the key.
The S1 : TC menu is displayed:
S1 : TC
Conductivity Cal
Temperature Cal
Edit Cal
Restore Cal Defaults
Exit
3 Use the / keys to select Conductivity Cal
and press the .
The Conductivity Cal menu is displayed:
Conductivity Cal
PV 24929 µS/cm
Continue When Stable
Abort
key:
Select
Select
Continue
4 Confirm the displayed reading is stable and the
5 Press the key to enter a new value (the transmitter
takes several seconds to validate the calibration):
Conductivity Cal
PV 24929 µS/cm
New 02495
Exit
Conductivity Cal
PV 24923 µS/cm
Abort
Invalid new calibration values generate an error
message and the calibration value is not accepted.
Conductivity Cal
PV 24935 µS/cm
Calibration Failed
Offset Too High
Exit
If the new value is valid, Slope and Offset values
are displayed.
key.
Continue