Tss Calibration; 1-Point Calibration - ABB AWT420 Operating Instruction

76 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

TSS calibration

1-Point calibration

1 At the Calibrate level, press the
The Calibrate menu is displayed:
Calibrate
S1 : Turb TSS
S2 : Turb TSS
Hold Outputs
Back
2 Use the / keys to select the sensor to be calibrated,
and press the key to confirm selection.
The TSS Cal menu is displayed:
Calibrate
Sensor Verification
Turbidity Cal
TSS Cal
TSS Manual Cal
Sample Collection
Collection Complete
Back
3 Press the / keys to select TSS Cal and
press the key to confirm selection.
The Calibration Type is displayed:
TSS Cal
Calibration Type
1-Point
Next
key:
Select
Select
Edit
4 Use the key to edit the Calibration Type .
keys to select the required Calibration Type
Use the /
and press the key to confirm selection.
Press the and key to proceed to the next step.
The High Solution Value is displayed:
TSS Cal
High Solution Value
1.000 mg/l
Next
5 Use the
key to edit the High Solution Value.
Use the / keys to set the value and press the
to confirm changes.
Press the and key to proceed to the next step.
Calibrate Turbidity Cal
Start Cal? High Solution Value
20000 NTU
1.000 mg/l
Abort Next
6 Ensure the sensor is inserted in the solution and press the
key to start the verification routine.
The calibration process screen is displayed:
Calibrate
PV 1.0000 mg/l
mV 0.000 NTU
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 (
Edit
Continue Edit
).
key