ABB AWT420 - Page 63

AWT420 | UNIVERSAL 4-WIRE, DUAL-INPUT TRANSMITTER | OI/AWT420-EN REV. B
63
6 Use the key to edit the low buffer value.
Use the / keys to set the value and press
the key to confirm changes.
Press the key to proceed to the next step.
The second buffer value is displayed:
7 Use the key to edit the high buffer value.
Use the / keys to set the value and press
the key to confirm changes.
Press the key to proceed to the low buffer
calibration:
8 Place the sensor into buffer 1 and press the
key to perform the low buffer calibration. The
calibration process screen is displayed:
• If the calibration fails the result screen is displayed
with the reason for failure.
• If the calibration passes the procedure moves
automatically to the high buffer calibration.
9 Place the sensor into buffer 2 and press the
key to perform the high buffer calibration. The
calibration process screen is displayed:
On completion the result screen is displayed.
• If the calibration passes the slope and offset values
are displayed.
• If the calibration fails, the failure reason is displayed.
Note. The calibration can be canceled at any time during
the process by pressing the Abort key.
1
2
3
Sensor Cal
Next
Edit
High Buffer Value
9.0 pH
Calibrate
Abort
Continue
Immerse in Buffer 1
4.0 pH
Calibrate
Abort
pH 4.00 pH
Tmp 25.0 °C
Settling-Please Wait
Calibrate
Abort
Continue
Immerse in Buffer 2
9.0 pH
Calibrate
Abort
pH 9.00 pH
Tmp 25.0 °C
Settling-Please Wait