Walchem W900 Series Instruction Manual

Also see for W900 Series: Troubleshooting guide Instruction manual Quick programming guide Instruction manual

Contents

Walchem W900 Series Instruction Manual Manual pdf 49 page image

445.2 Inputs MenuTouch the Inputs icon to view a list of all sensor and digital inputs. The Page Down icon pages down the list of inputs,the Page Up icon pages up the list of inputs, the Main Menu icon brings back the previous screen.Touch the input to access that input’s details, calibration (if applicable) and settings.Sensor Input DetailsThe details for any type of sensor input include the current value read, alarms, the raw (uncalibrated) signal, the sensortype, and the calibration gain and offset. If the sensor has automatic temperature compensation, then the sensor’stemperature value and alarms, the temperature resistance value read, and the type of temperature element requiredare also displayed under a separate sensor input menu.CalibrationTouch the Calibration icon to calibrate the sensor. Select the calibration to perform: One Point Process, One PointBuffer or Two Point Buffer Calibration. Not all calibration options are available for all types of sensor.One Point Process CalibrationNew ValueEnter the actual value of the process as determined by another meter or laboratory analysis and touch Confirm.Cal Successful or FailedIf successful, touch Confirm to put the new calibration in memory.If failed, you may retry the calibration or cancel. Refer to Section 8 to troubleshoot a calibration failure.One Point Buffer Calibration, Disinfection/Generic Sensor Zero Cal, Conductivity Air CalCal Disables ControlTouch Confirm to continue or Cancel to abortBuffer Temperature (only appears if no temperature sensor is detected for sensor types that use automatic tem-perature compensation)Enter the temperature of the buffer and touch Confirm.Buffer Value (only appears for One Point Calibration except when automatic buffer recognition is used))Enter the value of the buffer being usedRinse SensorRemove the sensor from the process, rinse it off, and place it in the buffer solution (or oxidizer-free water forZero Cal, or air for the conductivity open air cal). Touch Confirm when ready.StabilizationWhen the temperature (if applicable) and signal from the sensor is stable, the controller will automatically moveto the next step. If they don’t stabilize you may manually go to the next step by pressing Confirm.Cal Successful or FailedIf successful, touch Confirm to put the new calibration in memory.If failed, you may retry the calibration or cancel. Refer to Section 8 to troubleshoot a calibration failure.Resume ControlReplace the sensor in the process and touch Confirm when ready to resume control.Two Point Buffer CalibrationCal Disables ControlTouch Confirm to continue or Cancel to abortBuffer Temperature (only appears if no temperature sensor is detected for sensor types that use automatictemperature compensation)Enter the temperature of the buffer and touch Confirm.