Walchem WDP420 Instruction Manual

Walchem WDP420 Instruction Manual Manual pdf 21 page image

184.0 FUNCTION OVERVIEW4.1 Front PanelFigure 5 Front Panel4.2 DisplayA summary screen is displayed while the WPH/WDP controller is on. If you have a single sensor(WPH), this display will show a bar graph of the pH/ORP relative to the set point, the numeric sensorreading, and current operating conditions. If you have two sensors (WDP), the bar graph will bereplaced by the other sensor's reading.Towards the center of the bar graph are the (S)'s, which represent the set points. The bar graph growsfrom the left hand side, and the point furthest to the right indicates where the process value is relative tothe set points.The bottom line of the summary screen displays the following potential status messages: Probe Error,Temp Sensor Err, Calibration Time, Output Timeout, High/Low Alarm, Range Alarm, In Range Output,Output On, Probe Wash, Probe Wash Hold, Normal and InterlockOn/Off Power SwitchBacklit LCD DisplayOutput LEDsSetting Adjustment KeysMenu/Function KeysUSB ConnectorUSB LED