Index: firmware/App/Controllers/DialInFlow.c
===================================================================
diff -u -r562333878837ad2ff1efa6e61e6cdbf332227fec -rc653aeb570c11e65ab6859f966c6081c8e3de318
--- firmware/App/Controllers/DialInFlow.c	(.../DialInFlow.c)	(revision 562333878837ad2ff1efa6e61e6cdbf332227fec)
+++ firmware/App/Controllers/DialInFlow.c	(.../DialInFlow.c)	(revision c653aeb570c11e65ab6859f966c6081c8e3de318)
@@ -182,9 +182,9 @@
 static U32 errorDialInRotorSpeedPersistTimerCtr = 0;                                ///< Persistence timer counter for rotor speed error condition.
 static U32 errorDialInPumpDirectionPersistTimerCtr = 0;                             ///< Persistence timer counter for pump direction error condition.
 
-static F32 flowReadings[ SIZE_OF_ROLLING_AVG ];                                     ///< Holds flow samples for a rolling average.
+static F64 flowReadings[ SIZE_OF_ROLLING_AVG ];                                     ///< Holds flow samples for a rolling average.
 static U32 flowReadingsIdx = 0;                                                     ///< Index for next sample in rolling average array.
-static F32 flowReadingsTotal = 0.0;                                                 ///< Rolling total - used to calc average.
+static F64 flowReadingsTotal = 0.0;                                                 ///< Rolling total - used to calc average.
 static U32 flowReadingsCount = 0;                                                   ///< Number of samples in flow rolling average buffer.
 
 static U32 dipCurrErrorDurationCtr = 0;                                             ///< Used for tracking persistence of dip current errors.
@@ -201,7 +201,7 @@
 static void setDialInPumpDirection( MOTOR_DIR_T dir );
 static void publishDialInFlowData( void );
 static void resetDialInFlowMovingAverage( void );
-static void filterDialInFlowReadings( F32 flow );
+static void filterDialInFlowReadings( F64 flow );
 static void updateDialInPumpSpeedAndDirectionFromHallSensors( void );
 static void checkDialInPumpRotor( void );
 static void checkDialInPumpDirection( void );
@@ -406,12 +406,12 @@
     U08 spReadCtr = getFPGADialysateFlowSlowPacketReadCounter();
     U08 flowErrorCtr = getFPGADialysateFlowErrorCounter();
     U08 flowStatus = getFPGADialysateFlowMeterStatus();
-    F32 dipFlow;
+    F64 dipFlow;
 
     // Process new dialysate flow readings
     if ( TRUE == getDialysateFlowDataFreshFlag() )
     {
-        dipFlow = getDGDialysateFlowRateLMin() * (F32)ML_PER_LITER; // convert rate to mL/min
+        dipFlow = getDGDialysateFlowRateLMin() * (F64)ML_PER_LITER; // convert rate to mL/min
         filterDialInFlowReadings( dipFlow );                        // process the fresh dialysate flow data
         dialysateFlowDataFreshStatusCounter = 0;                    // reset counter
     }
@@ -880,7 +880,7 @@
  * @details Outputs: flowReadings[], flowReadingsIdx, flowReadingsCount, flowReadingsTotal
  * @return none
  *************************************************************************/
-void filterDialInFlowReadings( F32 flow )
+void filterDialInFlowReadings( F64 flow )
 {
     if ( flowReadingsCount >= SIZE_OF_ROLLING_AVG )
     {
@@ -890,7 +890,7 @@
     flowReadingsTotal += flow;
     flowReadingsIdx = INC_WRAP( flowReadingsIdx, 0, SIZE_OF_ROLLING_AVG - 1 );
     flowReadingsCount = INC_CAP( flowReadingsCount, SIZE_OF_ROLLING_AVG );
-    measuredDialInFlowRate.data = flowReadingsTotal / (F32)flowReadingsCount;
+    measuredDialInFlowRate.data = (F32)( flowReadingsTotal / (F64)flowReadingsCount );
 }
 
 /*********************************************************************//**