Index: firmware/App/Controllers/BalancingChamber.h
===================================================================
diff -u -r6d0bd19fb192dcd272fa773e8833862cc8a8f750 -r8348015aa77e1ee2c4c20e9f8e2c45b59bcf3f17
--- firmware/App/Controllers/BalancingChamber.h	(.../BalancingChamber.h)	(revision 6d0bd19fb192dcd272fa773e8833862cc8a8f750)
+++ firmware/App/Controllers/BalancingChamber.h	(.../BalancingChamber.h)	(revision 8348015aa77e1ee2c4c20e9f8e2c45b59bcf3f17)
@@ -38,6 +38,7 @@
 #define BC_FRESH_FILL_PRESSURE_PSIG                 15.0F              ///< Fresh side pressure (drop) during balancing chamber switching, indicates fill has been started / in progress.
 #define BC_SPENT_FILL_PRESSURE_PSIG                 29.0F              ///< Spent side pressure (drop) during balancing chamber switching, indicates fill has been started / in progress.
 #define BAL_CHAMBER_FILL_VOLUME_ML                  30.0F              ///< Balancing chamber fill/drain volume per batch operation.
+#define BAL_CHAMBER_TIME_BASED_D48_SPEED_RPM        250                ///< Minimum D48 speed and fixed speed for time-based balancing chamber switching.
 
 /// balancing chamber data structure
 typedef struct
@@ -63,6 +64,7 @@
 void updateBalChamberSwitchingPeriod( void );                            // Update the balancing chamber switching period
 BAL_CHAMBER_EXEC_STATE_T getCurrentBalancingChamberExecState( void );    // Get the current state of the balancing chamber execution
 F32 getBalChamberSwitchingFreq( void );                                  // Get the balancing chamber switching frequency
+F32 getBalChamberActiveDialysateFlowrate( void );                        // Get the active Qd used by balancing chamber timing
 U32 getDialDeliveryProgressStatus( void );                               // Get the dialysate delivery in progress status
 BOOL getBalancingChamberFillinProgressStatus( void );                    // Get the balancing chamber fill in progress status
 void valveControlForBCClosedState( void );                               // Closes all balancing chamber valves