183 Technical Description3.7 Cold-start DelayColdstart delay is used for suppressing incorrect measured values while the probe is heatingup. A cold start delay is activated always after ’Power off’ or the replacement of a probe.The cold start delay can be aborted at any time:• by using the multi-function pushbutton• by the display and operating unit (optional), see separate publication• by using the remote display software, see separate publicationDuring the cold start delay or in fault condition the following values are output:• a default value (factory setting of O 2 0 Vol. %, parameter 361)• the ’current measurement value’ (factory setting parameter 362)The internal resistance of the zirconium dioxide measuring cell is monitored during the coldstart delay. It is only allowed to measure at the end of a specified time if the value is below athreshold value of 200 Ω.3.8 Analogue Outputs 0/4 … 20 mA, 0/2 … 10 Vby plug-in cards on processor card of LT2-K (max. 4) – can be plugged in at any time• Type 657R0050 non-floating (1 channel)The jumpers switch only the hardware between current output and voltage outputThe selection of 0 ... 20 mA or 4 ... 20 mA and 0 ... 10 V or 2 ... 10 V is set in parameter 531.Type 657R0051 is floating with a maximum potential difference of 20 V (only possible withoutput 1 and output 2).Fig. 3-12 Analogue output card Fig. 3-13 X-Jumpers for voltage output 0/2 ... 10 VY- Jumpers for current output 0/4 ... 20 mAFig. 3-14 plug in card for floatingoutput type 657R0051
