There is already a PT 100 for E3/Ultimaker available for direct usage. PT 100 needs special electronics to deliver the correct voltages.

Not sure what your table should present, but it does not look like a valid table. ADC values go from 0-4095 and temperatures are multiplied with 8 in our tables.

Manually defined 50 would be user table 1, so add in configuration.h your version of this:

/** Userdefined thermistor tableThere are many different thermistors, which can be combined with different resistors. This resultin unpredictable number of tables. As a resolution, the user can define one table here, that canbe used as type 5 for thermistor type in extruder/heated bed definition. Make sure, the number of entriesmatches the value in NUM_TEMPS_USERTHERMISTOR0. If you span definition over multiple lines, make sure to endeach line, except the last, with a backslash. The table format is {{adc1,temp1},{adc2,temp2}...} withincreasing adc values. For more informations, readhttp://hydraraptor.blogspot.com/2007/10/measuring-temperature-easy-way.html</span></td></tr><tr style="box-sizing: border-box;"><td id="L587" class="blob-num js-line-number" data-line-number="587" style="box-sizing: border-box; padding: 0px 10px; width: 50px; min-width: 50px; font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace; font-size: 12px; line-height: 20px; color: rgba(0, 0, 0, 0.298039); text-align: right; white-space: nowrap; vertical-align: top; cursor: pointer; -webkit-user-select: none; border-style: solid; border-color: rgb(238, 238, 238); border-image: initial; border-width: 0px 1px 0px 0px;">If you have a sprinter temperature table, you have to multiply the first value with 4 and the second with 8.This firmware works with increased precision, so the value reads go from 0 to 4095 and the temperature istemperature8.If you have a PTC thermistor instead of a NTC thermistor, keep the adc values increasing and use thermistor types 50-52 instead of 5-7!*//** Number of entries in the user thermistor table 0. Set to 0 to disable it. /#define NUM_TEMPS_USERTHERMISTOR0 28#define USER_THERMISTORTABLE0 {</td> {1*4,8648},{214,3008},{254,2908},{294,2808},{334,2708},{394,2608},{464,2508},{544,2408},{644,2308},{754,2208},</td> {90*4,2108},{1074,2008},{1284,1908},{1544,1808},{1844,1708},{2214,1608},{2654,1508},{3164,1408},{3754,1308},</td> {441*4,1208},{5134,1108},{5884,1008},{7344,808},{8564,608},{9384,408},{9864,208},{10084,08},{10184,-20*8} }