Walchem WTCW100 Series Instruction Manual

Contents

Walchem WTCW100 Series Instruction Manual Manual pdf 19 page image

32 335.2.1 Contacting ConductivitySettingsPress the Settings key view or change the settings related to the sensor.Alarms Low-Low, Low, High and High-High Alarms limits may be set.Deadband This is the Alarm Deadband. For example, if the High Alarm is 3000, and the deadband is10, the alarm will activate at 3001 and deactivate at 2990.Reset CalibrationValuesEnter this menu to reset the sensor calibration back to factory defaults.Cal Required Alarm To get an alarm message as a reminder to calibrate the sensor on a regular schedule, enterthe number of days between calibrations. Set it to 0 if no reminders are necessary.Alarm Suppression If any of the relays or digital inputs are selected, any alarms related to this input will besuppressed if the selected relay or digital input is active. Typically this is used to preventalarms if there is no sample flow past the flow switch digital input.Smoothing Factor Increase the smoothing factor percentage to dampen the response to changes. For exam-ple, with a 10% smoothing factor, the next reading shown will consist of an average of10% of the previous value and 90% of the current value.Default Temp If the temperature signal is lost at any time, then the controller will use the Default Tempsetting for temperature compensation.Cable Length The controller automatically compensates for errors in the reading caused by varying thelength of the cable.Gauge The cable length compensation depends upon the gauge of wire used to extend the cableCell Constant Change the cell constant to match the sensor connected.Temp Comp Select between the standard NaCl temperature compensation method or a linear %/ de-gree C method.Comp Factor This menu only appears if Linear Temp Comp is selected. Change the %/degree C tomatch the chemistry being measured. Standard water is 2%.Units Select the units of measure for the conductivity.Name The name used to identify the sensor may be changed.Type Select the type of sensor to be connected.5.2.2 Electrodeless ConductivitySettingsPress the Settings key view or change the settings related to the sensor.Alarms Low-Low, Low, High and High-High Alarms limits may be set.Deadband This is the Alarm Deadband. For example, if the High Alarm is 3000, and the deadband is10, the alarm will activate at 3000 and deactivate at 2990.Reset CalibrationValuesEnter this menu to reset the sensor calibration back to factory defaults.Cal Required Alarm To get an alarm message as a reminder to calibrate the sensor on a regular schedule, enterthe number of days between calibrations. Set it to 0 if no reminders are necessary.Alarm Suppression If any of the relays or digital inputs are selected, any alarms related to this input will besuppressed if the selected relay or digital input is active. Typically this is used to preventalarms if there is no sample flow past the flow switch digital input.Smoothing Factor Increase the smoothing factor percentage to dampen the response to changes. For exam-ple, with a 10% smoothing factor, the next reading shown will consist of an average of10% of the previous value and 90% of the current value.Cable Length The controller automatically compensates for errors in the reading caused by varying thelength of the cable.Gauge The cable length compensation depends upon the gauge of wire used to extend the cableCell Constant Do not change unless instructed by the factory. The default value is 6.286Range Select the range of conductivity that best matches the conditions the sensor will see.Installation Factor Do not change unless instructed by the factory. The default value is 1.000.Default Temp If the temperature signal is lost at any time, then the controller will use the Default Tempsetting for temperature compensation.Temp Comp Select between the standard NaCl temperature compensation method or a linear %/ de-gree C method.Comp Factor This menu only appears if Linear Temp Comp is selected. Change the %/degree C tomatch the chemistry being measured. Standard water is 2%.Units Select the units of measure for the conductivity.Name The name used to identify the sensor may be changed.Type Select the type of sensor to be connected.5.2.3 TemperatureSettingsPress the Settings key view or change the settings related to the sensor.Alarms Low-Low, Low, High and High-High Alarms limits may be set.Deadband This is the Alarm Deadband. For example, if the High Alarm is 100, and the deadband is1, the alarm will activate at 100 and deactivate at 99.Reset CalibrationValuesEnter this menu to reset the sensor calibration back to factory defaults.Cal Required Alarm To get an alarm message as a reminder to calibrate the sensor on a regular schedule, enterthe number of days between calibrations. Set it to 0 if no reminders are necessary.Alarm Suppression If any of the relays or digital inputs are selected, any alarms related to this input will besuppressed if the selected relay or digital input is active. Typically this is used to preventalarms if there is no sample flow past the flow switch digital input.Smoothing Factor Increase the smoothing factor percentage to dampen the response to changes. For exam-ple, with a 10% smoothing factor, the next reading shown will consist of an average of10% of the previous value and 90% of the current value.Name The name used to identify the sensor may be changed.Element Select the specific type of temperature sensor to be connected.5.2.4 DI StateInput DetailsThe details for this type of input include the current state with a custom message for open versus closed, alarms, andthe status of the interlock.SettingsPress the Settings key view or change the settings related to the sensor.Open Message The words used to describe the switch state may be customized.Closed Message The words used to describe the switch state may be customized.Interlock Choose whether the input should be in the interlocked state when the switch is eitheropen or closed.Total Time Choose to totalize the amount of time that the switch has been open or closed. This willbe displayed on the input details screen.Reset Total Time Enter this menu to reset the accumulated time to zero. Press Confirm to accept, Cancel toleave the total at the previous value and go back.