Index: firmware/App/Controllers/BalancingChamber.h
===================================================================
diff -u -ra414ca5b1458b0800e32672eeb7545a9dd575002 -r1d4d4b56b96a50cf32c9db93c322cc97a25cab7d
--- firmware/App/Controllers/BalancingChamber.h	(.../BalancingChamber.h)	(revision a414ca5b1458b0800e32672eeb7545a9dd575002)
+++ firmware/App/Controllers/BalancingChamber.h	(.../BalancingChamber.h)	(revision 1d4d4b56b96a50cf32c9db93c322cc97a25cab7d)
@@ -31,29 +31,31 @@
 
 // ********** public definitions **********
 
-#define FRESH_DIAL_PRESSURE_MIN_PSIG                21.0F                                       ///< Minimum fresh dialysate pressure (PDf) limit for balancing chamber fill operations.
-#define FRESH_DIAL_PRESSURE_MAX_PSIG                27.0F                                       ///< Maximum fresh dialysate pressure (PDf) limit for balancing chamber fill operations.
-#define SPENT_DIAL_PRESSURE_MIN_PSIG                27.0F                                       ///< Minimum spent dialysate pressure (PDs) limit for balancing chamber fill operations.
-#define SPENT_DIAL_PRESSURE_MAX_PSIG                31.0F                                       ///< Maximum spent dialysate pressure (PDs) limit for balancing chamber fill operations.
+#define FRESH_DIAL_PRESSURE_MIN_PSIG                21.0F              ///< Minimum fresh dialysate pressure (D18) limit for balancing chamber fill operations.
+#define FRESH_DIAL_PRESSURE_MAX_PSIG                27.0F              ///< Maximum fresh dialysate pressure (D18) limit for balancing chamber fill operations.
+#define SPENT_DIAL_PRESSURE_MIN_PSIG                27.0F              ///< Minimum spent dialysate pressure (D51) limit for balancing chamber fill operations.
+#define SPENT_DIAL_PRESSURE_MAX_PSIG                31.0F              ///< Maximum spent dialysate pressure (D51) limit for balancing chamber fill operations.
+#define BC_FILL_PRESSURE_MIN_PSIG                   13.0F              ///< Minimum pressure (drop) during balancing chamber switching, indicates fill has been started / in progress.
+#define BC_FILL_PRESSURE_MAX_PSIG                   9.0F               ///< Maximum pressure (drop) during balancing chamber switching, indicates fill has been started / in progress.
 
 /// balancing chamber data structure
 typedef struct
 {
-    U32 balChamberExecState;                            ///< Balancing chamber execution state
-    U32 balChamberSWState;                              ///< Balancing chamber switching state (state 1 or state 2)
-    F32 balChamberSWFreq;                               ///< Balancing chamber switching frequency
-    U32 balChamberSwPeriod;                             ///< Balancing chamber switching period
-    BOOL isBalChamberFillInProgress;                    ///< Whether balancing chamber fill in progress or not
-    U32 currentBalChamberSwitchingCounter;              ///< Current balancing chamber switching counter
-    BOOL isPressureStalbilizedDuringFill;               ///< Whether pressure stabilized during fill or not
-    BOOL balChamberSWOnlyState;                         ///< Balancing chamber switching only status ( On/Off)
+    U32 balChamberExecState;                                            ///< Balancing chamber execution state
+    U32 balChamberSWState;                                              ///< Balancing chamber switching state (state 1 or state 2)
+    F32 balChamberSWFreq;                                               ///< Balancing chamber switching frequency
+    U32 balChamberSwPeriod;                                             ///< Balancing chamber switching period
+    BOOL isBalChamberFillInProgress;                                    ///< Whether balancing chamber fill in progress or not
+    U32 currentBalChamberSwitchingCounter;                              ///< Current balancing chamber switching counter
+    BOOL isPressureStalbilizedDuringFill;                               ///< Whether pressure stabilized during fill or not
+    BOOL balChamberSWOnlyState;                                         ///< Balancing chamber switching only status ( On/Off)
 } BAL_CHAMBER_DATA_T;
 
 // ********** public function prototypes **********
 
-void initBalanceChamber( void );                        // Initialize balancing chamber unit
-void transitionToBalChamberFill( void );                // Prepares for transition to balancing chamber execution
-U32  execBalancingChamberControl( void );                      // Execute the balancing chamber state machine
+void initBalanceChamber( void );                                         // Initialize balancing chamber unit
+void transitionToBalChamberFill( void );                                 // Prepares for transition to balancing chamber execution
+U32  execBalancingChamberControl( void );                                // Execute the balancing chamber state machine
 
 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
@@ -69,6 +71,8 @@
 BOOL testDDBalChamberDataPublishIntervalOverride( MESSAGE_T *message );  // To override the balancing chamber data publish interval
 BOOL testBalChamberSwFreqOverride( MESSAGE_T *message );                 // To override the balancing chamber switching frequency
 BOOL testBCSwitchOnlyStartStopOverride( MESSAGE_T *message );            // To override the balancning chamber switching only start/stop control
+BOOL testAcidDoseVolumeOverride( MESSAGE_T *message );                   // To override acid dosing volume
+BOOL testBicarbDoseVolumeOverride( MESSAGE_T *message );                 // To override bicarb dosing volume
 
 /**@}*/