diff --git a/TOF/App/app_tof_vl53l0x_range.c b/TOF/App/app_tof_vl53l0x_range.c
index cf060a9..83d4d2b 100644
--- a/TOF/App/app_tof_vl53l0x_range.c
+++ b/TOF/App/app_tof_vl53l0x_range.c
@@ -44,6 +44,7 @@
  * @defgroup ErrCode Errors code shown on display
  * @{
  */
+#define		STS_MAX_L0_RANGE		((uint32_t) 2000)
 #define ERR_DETECT             -1
 #define ERR_DEMO_RANGE_ONE     1
 #define ERR_DEMO_RANGE_MULTI   2
@@ -367,17 +368,15 @@ void STS_TOF_VL53L0X_Range_Process(void)
 	  nSensorPresent = sts_tof_vl53l0x_DetectSensors();					// confirm sensor online
 	  APP_LOG(TS_OFF, VLEVEL_H, "\r\n %u pcs sensor(s) online \r\n", nSensorPresent);
   }
-  sts_tof_distance_data[0] = 0;
-  sts_tof_distance_data[1] = 0;
-  sts_tof_distance_data[2] = 0;
+  sts_tof_distance_data[0] = STS_MAX_L0_RANGE;
+  sts_tof_distance_data[1] = STS_MAX_L0_RANGE;
+  sts_tof_distance_data[2] = STS_MAX_L0_RANGE;
 
   if (nSensorPresent > 0)
   {
 	  // RangingConfig == HIGH ACCURACY, LONG RANGE, HIGH SPEED
 	  sts_tof_vl53l0x_SetupSingleShot(RangingConfig);
-	  sts_tof_distance_data[0]=0;
-	  sts_tof_distance_data[1]=0;
-	  sts_tof_distance_data[2]=0;
+
 	  sensor_data_ready = 0 ;
 	  for (i=0; i< MAX_TOF_COUNT; i++)
 	  {
@@ -390,6 +389,7 @@ void STS_TOF_VL53L0X_Range_Process(void)
 				if( RangingMeasurementData.RangeStatus == 0 )
 				{
 				  sts_tof_distance_data[i] = (int)VL53L0XDevs[i].LeakyRange;
+				  if (sts_tof_distance_data[i] ==0) sts_tof_distance_data[i]+= STS_MAX_L0_RANGE;
 		  		  nDevMask |= (1 << i);
 		  		  sensor_data_ready |= 1;
 				 }  else