Quick Reference for End-Users Lambda Transmitter LT2 ... - lamtec

6 Commissioning / Shutdown6.2 Preliminary Works6.2.1 The LT2 Lambda Transmitter's Display and Operating ElementsThe LT2's operation and the display of measured valued, operational and error messages takeplace via the (optional) display and operating unit, see separate publication no. DLT2002, orvia a PC in conjunction with the (optional) service and diagnostic software, or via an externaloperating unit using an RS 422 interface (in preparation). The LT2 itself has only limited operatingcapabilities, which however allow it to initiate or to display on the LT2 all the functionsnecessary for operation, maintenance and servicing, including directly.NOTICE!The display and operating elements are not freely accessible on the LT2 - panel installation.For this reason the LT2 - panel installation is generally supplied only with a 657 R 08 31 displayand operating unit.1 Display of operating mode2 Warning /Fault display3 Maintenance switch4 Multifunction key6.2.2 Monitor OutputThe monitor output [terminals 31 (-), 32 (+)] make it possible to connect (e.g.) a multimeter.You can interrogate the following values on site via the LT2's monitor output:– O 2 -measured value– Probe voltage [U S ]– The measuring cell's AC internal resistance [R I ]DIP switch processor cardSW 1 SW 2 Monitor output functionoff off O 2 -measured value 0...2.5 V = 0...25 Vol.% O 2on off Probe voltage 0...2.5 V = 0...250 mVoff on Cell internal resistance 0...2.5 = 0...250 Input resistance of the connected meter greater than 10 k.32