Rdo; Dissolved Oxygen Calibration; 1-Point Calibration - ABB AWT420 Operating Instruction

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

RDO

This section should be read in conjunction with Operating instruction OI/ADS430-EN.
Menu Comment
Sensor Calibration See Dissolved oxygen calibration .
There are two possible calibration modes:
• 1-point (water-saturated air)
• 2-point (100 % and 0 % saturation)

Dissolved oxygen calibration

1-Point calibration

1 At the Calibrate level, press the
The Calibrate menu is displayed:
Calibrate
S1 : RDO
S2 : RDO
Hold Outputs
Back
2 Use the / keys to select the sensor to be calibrated,
and press the key to confirm selection.
The RDO calibration menu is displayed:
Calibrate
Sensor Calibration
Back
3 Press the
key to confirm selection.
The Calibration Type is displayed:
Sensor Calibration
Calibration Type
1-Point
Next
key:
Select
Select
Edit
4 Use the key to edit the Calibration Type .
Use the / keys to select the required Calibration Type
and press the key to confirm selection.
Press the and key to proceed to the next step.
Calibrate
Start Span Cal?
Place in 100% Sat
Abort
5 Ensure the sensor is subjected to 100% saturation and
press the key to start the calibration process.
The calibration process screen is displayed:
Calibrate
PV 98.26 %
TMP 24.22 °C
Settling - Please Wait
Abort
On completion the result screen is displayed.
• If the calibration passes the new settings are displayed.
• If the calibration fails the reason for failure is displayed.
Note. The calibration can be canceled at any time during the
process by pressing the Abort key (
Continue
).
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