64AW 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… pH/Redox/ORP calibration1-Point automatic calibrationNote. Before starting the calibration ensure the pH buffersare set to the correct values.1 At the Calibrate level, press the key:The Calibrate menu is displayed:2 Use the / keys to select the sensor to becalibrated, and press the key to confirm selection.The pH calibration menu is displayed:3 Use the / keys to select sensor calibration 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 calibrationtype and press the key to confirm selection.Press the key to proceed to the next step.5 Place the sensor into buffer 1 and press thekey to perform the calibration. The calibrationprocess screen is displayed.On completion the result screen is displayed.• If the calibration passes, the slope and offset values aredisplayed.• If the calibration fails, the failure reason is displayed.Note. The calibration can be canceled at any time duringthe process by pressing the Abort key.CalibrateBack SelectS1 : pH/Redox (ORP)S2 : pH/Redox (ORP)pH BuffersHold OutputsCalibrateBack SelectSensor CalTemperature CalEdit CalSample CollectionCollection CompleteRestore Cal DefaultsSensor CalNext EditCalibration Type1-Pt AutoCalibrateAbort ContinueImmerse in Buffer 1ABB4.0 pHCalibrateAbortpH 4.00 pHTmp 25.0 °CSettling-Please Wait
