//********************************

      file: range.c

This code was modified to average 10 readings for both test and final results.  Identical runs using a total of 40 readings show no improvement in accuracy.

**************************************/
   

float range_avg()
  {int temp_range;
   int wedge_check;
   int q;
   int total_range;
   float sensor;
   float result;
   int test_range; /*use to throw out bad values*/
   int offset;

  
   { test_range=0;
      wedge_check=0;
      total_range=0;

      for (q=1;q<11;q++)
      {sleep(.03);
      temp_range=analog(4);
      if(temp_range > 101 || temp_range < 18)
        {q--;
         wedge_check++;
         if (wedge_check>=10)
         {/*printf("range violation...\n");*/
         return 0.;
         break;}}
      else 
        test_range += temp_range;}

      test_range=test_range/10; /*use this number to check and discard ranges */
     
      wedge_check=0;
      offset=1;

      if (test_range>53)
        offset=3;
      if (test_range>73)
        offset=4;
    
      for (q=1;q<11;q++)
      {sleep(.03);
      temp_range=analog(4);
      if(temp_range > test_range + offset|| temp_range < test_range - offset)
        {q--;
        wedge_check++;
         if (wedge_check>=10)
          {total_range=0;
           return 0.;
           break;}}
         else 
          total_range += temp_range;}
  
          sensor = (float)(total_range)/10.;
          sensor = sensor/10.; /*get to fit in polynomial*/

         if (sensor>1.9)


{result=251.074-305.18338*sensor+175.0571222*(sensor^2.)-55.761907597*(sensor^3.0)+10.41118763938*(sensor^4.0)-1.1318716320922*(sensor^5.0)+.066254012440301*(sensor^6.0)-.00161179616687254*(sensor^7.0);
     
      return result;}
}
}


/***********************END**************************/