ABB AWT420 Operating Instruction

Also see for AWT420: Commissioning instructions Manual Manual

Contents

ABB AWT420 Operating Instruction Manual pdf 72 page image

72AW 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 proceduresTurbidity TSS calibration1-Point calibration1 At the Calibrate level, press the key:The Calibrate menu is displayed:2 Use the / keys to select the sensor to be calibrated,and press the key to confirm selection.The Turbidity Cal menu is displayed:3 Press the / keys to select Turbidity Cal andpress the key to confirm selection.The Calibration Type is displayed:4 Use the key to edit the Calibration Type .Use the / keys to select the required Calibration Typeand press the key to confirm selection.Press the and key to proceed to the next step.The Offset setting is displayed:5 For most cases a zero offset is suitable. However, insituations where an offset was previously determined duringa 2-point calibration, it is possible to retain the previouslymeasured offset during the 1-point calibration.Use the key to edit the Offset setting.Use the / keys to select either Remove Offset orRetain Offset and press the key to confirm changes.Press the and key to proceed to the next step.The High Solution Value is displayed:6 Use the key to edit the solution value .Use the / keys to set the value and press the keyto confirm changes.Press the and key to proceed to the next step.CalibrateBack SelectS1 : Turb TSSS2 : Turb TSSHold OutputsCalibrateBack SelectSensor VerificationTurbidity CalTSS CalTSS Manual CalSample CollectionCollection CompleteTurbidity CalCalibration Type1-PointNext EditTurbidity CalOffsetRemove OffsetNext EditTurbidity CalHigh Solution Value20000 NTUNext EditCalibrateStart Cal ?2000 NTUAbort Continue