4 Technical Description214.5.1 Multifunction push button T1NOTE:Function Button assignmentChange the displayedwarning/faultReset the displayedwarning/faultQuick start measuring gas pump,abort cold startInitiate offset calibration or test gascalibrationPress brieflyPress for more than 3s *Press for more than 3s **Press button for more than 3s ** inmeasurement mode* Some warnings and faults cannot be reset as long as the fault is stillpresent or the routine is still in progress.** If at least one warning or fault is present, the button must be pressedfor more than 6 seconds.4.5.2 Monitor outputThe monitor output [terminal 31 (-), 32 (+)] allows a multimeter to be connected, forexample. Via the monitor output, the following measurement values can be obtained insitu on the LT 2/KS1-DK:• O 2 measurement value• Probe voltage [U-O2] of O 2 sensor• AC internal resistance [Ri probe] of O 2 sensorProcessor board micro-switchesSW 1 SW 2 Function of monitor outputoff off O 2 measurement value 0...2.5 V ≡ 0…25 vol.% O 2on off Probe voltage (U-O2) of O 2 sensor 0...2.5 V ≡ 0…250 mVoff on Cell internal resistance (Ri probe) of O 2 sensor 0...2.5 V ≡ 0…250 ΩInput resistance of connected measuring device > 10 kΩ
