MAX31865 help - loss of resolution

Other Hardware Sensors
11 
void DataLogging()
{
  // open the file. note that only one file can be open at a time,
  // so you have to close this one before opening another.

  char datalog[ ] = "probe.txt";
  
  File dataFile = SD.open(datalog, FILE_WRITE);

  if (timeElapsed > interval) 
  {				
    // if the file is available, write to it:
    if (dataFile) {
      //dataFile.print(hour());dataFile.print(":");dataFile.print(minute());dataFile.print(":");dataFile.print(second());dataFile.print(" ");
      //dataFile.print(day());dataFile.print("/");dataFile.print(month());dataFile.print("/");dataFile.print(year());dataFile.print(" ");
      dataFile.print(F("S1: "));dataFile.println(F(Temp_PT1));
      dataFile.close();
    }  
    // if the file isn't open, pop up an error:
    else {
      //dataFile.println("error opening datalog.txt"); Enviar para display
    } 
    timeElapsed = 0;              // reset the counter to 0 so the counting starts over...
  }
  dataFile.close();
}