4 Technical Description204.5 Internal display and control elements of the LT 2/KS1-DK lambda transmitterThe LT 2/KS1-DK is operated and the measurement values, process status and faultstatus signals are displayed via the display and operating unit (see section 4.6), or viaPC in conjunction with the remote display software. The LT 2/KS1-DK itself featuresonly limited operator controls, which nevertheless permit the initiation or display of allfunctions necessary for operation, maintenance and service directly on the LT 2/KS1-DK as well.Display- and op erating elements on processor c ardWarni ng /FaultdisplayOperatingmod edispl ayMaintenanceswitchMulti-function-key5.1.3 Display and operat ing elementsOperati onal display (green) LED 6 Op erati onal stat us di splay (green) LED 5 Maintenance switch S 1O perat ion (lights up) Measurement (lights up)Calibration (flashes)Offset comp ensation (flashes slowl y)With test g as / comparative measurement (flashes rapi dly)M ai ntenance modeoffM ai ntenance modeMaintenance (orange) LED 1 Warni ng/fault display (red) LED 12Mai ntenance mode act ive (lights up )Normal operation (off) No warning / faul tAt l east one warning present (light s up)At l east one fault p resent (fl ashes)- ------on-- ---T T2 2S 1 S 12 2LED 1 LED 1LED 2 LED 2LED 3 LED 3LED 4 LED 4LED 5 LED 5LED 6 LED 6LED 7 LED 7LED 8 LED 8LED 9 LED 9LED 10 LED 10LED 1 LED 11 1LED 12 LED 12T 2S 12LED 1LED 2LED 3LED 4LED 5LED 6LED 7LED 8LED 9LED 10LED 11LED 12T 2S 12LED 1LED 2LED 3LED 4LED 5LED 6LED 7LED 8LED 9LED 10LED 11LED 12T T2 2S 1 S 12 2LED 1 LED 1LED 2 LED 2LED 3 LED 3LED 4 LED 4LED 5 LED 5LED 6 LED 6LED 7 LED 7LED 8 LED 8LED 9 LED 9LED 10 LED 10LED 1 LED 11 1LED 12 LED 12