Index: firmware/App/Controllers/PresOccl.c
===================================================================
diff -u -rab55a3f55e8ff168b1be66350616f27f9428633e -r8a78d0bee10166f1b5d2c47474f57f8a7b279cba
--- firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision ab55a3f55e8ff168b1be66350616f27f9428633e)
+++ firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision 8a78d0bee10166f1b5d2c47474f57f8a7b279cba)
@@ -175,7 +175,7 @@
 static OVERRIDE_F32_T shortFilteredArterialPressure = { 0.0, 0.0, 0.0, 0 };     ///< Measured arterial pressure after short (1 s) filter.
 static F32 longFilteredVenousPressure;                                          ///< Measured venous pressure after long (10 s) filter.
 static OVERRIDE_F32_T shortFilteredVenousPressure  = { 0.0, 0.0, 0.0, 0 };      ///< Measured venous pressure after short (1 s) filter.
-static STABILIZATION_PERIOD_T pressureStabilizeTime;                            ///< Pressure stabilization time based on system events such as airpump, treatment param changes etc.,
+static STABILIZATION_PERIODS_T pressureStabilizeTime;                            ///< Pressure stabilization time based on system events such as airpump, treatment param changes etc.,
 
 static U32 bloodPumpOcclusionAfterCartridgeInstall;                             ///< Measured blood pump occlusion reading taken after cartridge install.
 
@@ -451,7 +451,7 @@
  *                  USE_NORMAL_STABILIZATION_PERIOD, USE_SHORT_STABILIZATION_PERIOD
  * @return none
  *************************************************************************/
-void signalInitiatePressureStabilization( STABILIZATION_PERIOD_T stabilizationPeriod )
+void signalInitiatePressureStabilization( STABILIZATION_PERIODS_T stabilizationPeriod )
 {
     // User update of blood/dialysate flow rate or UF rate or  initiates/resets a stabilization period (if we were in stabilization or stable state)
     if ( PRESSURE_LIMITS_STATE_STABILIZATION == currPresLimitsState )
@@ -460,16 +460,17 @@
         U32 expiredTime = u32DiffWithWrap( stabilizationStartTimeMs, currentTime );
 
         // if pressure is already stabilized enough, assign the short stabilize time for the recent event ( air pump on).
-        // else,leave the current/on going stabilization to expire due to long pending stable time to settle down the pressure.
+        // else,allow the ongoing stabilization to complete.
         // allow Normal stabilization on a case when user updates flow rate or UF rate etc.,
-        if ( expiredTime >  PRES_LIMIT_MIN_STABILIZATION_TIME_IN_MS || stabilizationPeriod == USE_NORMAL_STABILIZATION_PERIOD )
+        if ( ( expiredTime > PRES_LIMIT_MIN_STABILIZATION_TIME_IN_MS ) ||
+             ( stabilizationPeriod == USE_NORMAL_STABILIZATION_PERIOD ) )
         {
             pressureStabilizeTime    = stabilizationPeriod;
             stabilizationStartTimeMs = getMSTimerCount();
         }
     }
     else if ( ( PRESSURE_LIMITS_STATE_STABLE == currPresLimitsState ) ||
-              ( PRESSURE_LIMITS_STATE_SHORT_RESTABILIZATION == currPresLimitsState ) )
+              ( PRESSURE_LIMITS_STATE_STABILIZATION_2 == currPresLimitsState ) )
     {
         pressureStabilizeTime = stabilizationPeriod;
         currPresLimitsState = PRESSURE_LIMITS_STATE_STABILIZATION;
@@ -489,7 +490,7 @@
 static void determineArtVenPressureLimits( void )
 {
     if ( ( PRESSURE_LIMITS_STATE_STABLE == currPresLimitsState ) ||
-         ( PRESSURE_LIMITS_STATE_SHORT_RESTABILIZATION == currPresLimitsState ) )
+         ( PRESSURE_LIMITS_STATE_STABILIZATION_2 == currPresLimitsState ) )
     {
         // apply pressure windows when stable
         S32 artOffset = getTreatmentParameterS32( TREATMENT_PARAM_ART_PRES_LIMIT_WINDOW ) / 2;                // Arterial is symmetric
@@ -656,14 +657,15 @@
             {
                 stabilizeTime = PRES_LIMIT_SHORT_STABILIZE_TIME_MS;
             }
-            else if ( USE_NORMAL_STABILIZATION_PERIOD == pressureStabilizeTime )
-            {
-                stabilizeTime = PRES_LIMIT_STABILIZATION_TIME_MS;
-            }
             else if ( STABILIZATION_PERIOD_OFF == pressureStabilizeTime )
             {
                 stabilizeTime = PRES_LIMIT_STABILIZATION_OFF;
             }
+            // Normal stabilization period
+            else
+            {
+                stabilizeTime = PRES_LIMIT_STABILIZATION_TIME_MS;
+            }
 
             if ( bpRunning != TRUE )
             {
@@ -677,19 +679,21 @@
             {
                 updatePressureLimitWindows();
                 stabilizationStartTimeMs = getMSTimerCount();
+                // second stage stabilization is not required when returning from stable state on every 15 minutes once.
                 if ( pressureStabilizeTime == STABILIZATION_PERIOD_OFF )
                 {
                     currPresLimitsState = PRESSURE_LIMITS_STATE_STABLE;
                 }
                 else
                 {
-                    currPresLimitsState = PRESSURE_LIMITS_STATE_SHORT_RESTABILIZATION;
+                    currPresLimitsState = PRESSURE_LIMITS_STATE_STABILIZATION_2;
                 }
                 pressureStabilizeTime = USE_NORMAL_STABILIZATION_PERIOD;
             }
             break;
 
-        case PRESSURE_LIMITS_STATE_SHORT_RESTABILIZATION:
+        case PRESSURE_LIMITS_STATE_STABILIZATION_2:
+            // second stage stabilization helps to re determine the pressure due to UF control change etc.,
             if ( bpRunning != TRUE )
             {
                 currPresLimitsState = PRESSURE_LIMITS_STATE_IDLE;
@@ -702,12 +706,12 @@
             {
                 updatePressureLimitWindows();
                 stabilizationStartTimeMs = getMSTimerCount();
-                pressureStabilizeTime = USE_NORMAL_STABILIZATION_PERIOD;
                 currPresLimitsState = PRESSURE_LIMITS_STATE_STABLE;
             }
             break;
 
         case PRESSURE_LIMITS_STATE_STABLE:
+            // Pressure is re determined after every 15 minutes once and be remain in limited pressure windows.
             if ( bpRunning != TRUE )
             {
                 currPresLimitsState = PRESSURE_LIMITS_STATE_IDLE;