Index: firmware/App/Drivers/TemperatureSensors.c
===================================================================
diff -u -rffd0828ba7d0c1ed6ae4624cfb2c502a2e7a203d -r98865667298d58132b40bceda1305b6bbc2204e0
--- firmware/App/Drivers/TemperatureSensors.c	(.../TemperatureSensors.c)	(revision ffd0828ba7d0c1ed6ae4624cfb2c502a2e7a203d)
+++ firmware/App/Drivers/TemperatureSensors.c	(.../TemperatureSensors.c)	(revision 98865667298d58132b40bceda1305b6bbc2204e0)
@@ -34,8 +34,6 @@
 
 // ********** private definitions **********
 
-#define USE_PT_100                                              1                                               ///< flag to check PT100 use in calculations
-
 #define PRIMARY_HEATER_TEMP_SENSORS_GAIN                        8U                                              ///< Primary heater temperature sensors gain.
 #define PRIMARY_HEATER_TEMP_SENSORS_REF_RESISTANCE              20000                                           ///< Primary heater temperature sensors reference resistance.
 #define PRIMARY_HEATER_TEMP_SENSORS_0_DEGREE_RESISTANCE         1000U                                           ///< Primary heater temperature sensors zero degree resistance.
Index: firmware/App/Monitors/Level.c
===================================================================
diff -u -rffd0828ba7d0c1ed6ae4624cfb2c502a2e7a203d -r98865667298d58132b40bceda1305b6bbc2204e0
--- firmware/App/Monitors/Level.c	(.../Level.c)	(revision ffd0828ba7d0c1ed6ae4624cfb2c502a2e7a203d)
+++ firmware/App/Monitors/Level.c	(.../Level.c)	(revision 98865667298d58132b40bceda1305b6bbc2204e0)
@@ -63,7 +63,6 @@
 static void publishLevelsData( void );
 static BOOL processLevelCount( U16 count );
 static LEVEL_STATE_T readFloaterLevelstatus( LEVEL_T levelId );
-static LEVEL_STATE_T readBicarbChamberFLevelStatus( void );
 
 /*********************************************************************//**
  * @brief
@@ -124,11 +123,11 @@
                 break;
 
             case D63_LEVL:
-                currentLevelStatus = readBicarbChamberFLevelStatus();
+                currentLevelStatus = ( processLevelCount( getFPGAD63LevelSensor() ) == 0 ? LEVEL_STATE_LOW : LEVEL_STATE_HIGH );
                 break;
 
             case D98_LEVL:
-                currentLevelStatus = readBicarbChamberFLevelStatus();
+                currentLevelStatus = ( processLevelCount( getFPGAD98LevelSensor() ) == 0 ? LEVEL_STATE_LOW : LEVEL_STATE_HIGH );
                 break;
 
             case D46_LEVL:
@@ -330,32 +329,35 @@
  * @details \b Outputs: level
  * @return level status
  *************************************************************************/
-static LEVEL_STATE_T readBicarbChamberFLevelStatus( void )
+LEVEL_STATE_T getBicarbChamberLevelStatus( void )
 {
-    BOOL upperlevel = FALSE;
-    BOOL lowerlevel = FALSE;
+    LEVEL_STATE_T status     = LEVEL_STATE_ILLEGAL;
+    BOOL          upperlevel = FALSE;
+    BOOL          lowerlevel = FALSE;
 
     // These FPGA reads are raw counts
     upperlevel = processLevelCount( getFPGAD63LevelSensor() );
     lowerlevel = processLevelCount( getFPGAD98LevelSensor() );
 
     if ( ( FALSE == lowerlevel ) && ( FALSE == upperlevel ) )
     {
-        return LEVEL_STATE_LOW;
+        status = LEVEL_STATE_LOW;
     }
     else if ( ( TRUE == lowerlevel ) && ( FALSE == upperlevel ) )
     {
-        return LEVEL_STATE_MEDIUM;
+        status = LEVEL_STATE_MEDIUM;
     }
     else if ( ( TRUE == lowerlevel ) && ( TRUE == upperlevel ) )
     {
-        return LEVEL_STATE_HIGH;
+        status = LEVEL_STATE_HIGH;
     }
     else
     {
-        //upperlevel == TRUE while lowerlevel == FALSE -> illegal
-        return LEVEL_STATE_ILLEGAL;
+        // upperlevel == TRUE while lowerlevel == FALSE - illegal
+        status = LEVEL_STATE_ILLEGAL;
     }
+
+    return status;
 }
 
 /*********************************************************************//**
@@ -374,10 +376,11 @@
     {
         DD_LEVEL_DATA_T data;
 
-        data.d6Level    = (U32)getLevelStatus( D6_LEVL );
-        data.d63Level   = (U32)getLevelStatus( D63_LEVL );
-        data.d98Level   = (U32)getLevelStatus( D98_LEVL );
-        data.d46Level   = (U32)getLevelStatus( D46_LEVL );
+        data.d6Level     = (U32)getLevelStatus( D6_LEVL );
+        data.d63Level    = (U32)getLevelStatus( D63_LEVL );
+        data.d98Level    = (U32)getLevelStatus( D98_LEVL );
+        data.bicarbLevel = (U32)getBicarbChamberLevelStatus();
+        data.d46Level    = (U32)getLevelStatus( D46_LEVL );
 
         levelsDataPublicationCounter = 0;
 
Index: firmware/App/Monitors/Level.h
===================================================================
diff -u -rae7a7f0dc06fd31a53b0db564d515ce4c39acf67 -r98865667298d58132b40bceda1305b6bbc2204e0
--- firmware/App/Monitors/Level.h	(.../Level.h)	(revision ae7a7f0dc06fd31a53b0db564d515ce4c39acf67)
+++ firmware/App/Monitors/Level.h	(.../Level.h)	(revision 98865667298d58132b40bceda1305b6bbc2204e0)
@@ -67,6 +67,7 @@
     U32 d6Level;                        ///< Floater level
     U32 d63Level;                       ///< Bicarb upper level
     U32 d98Level;                       ///< Bicarb lower level
+    U32 bicarbLevel;                    ///< Bicarb chamber level combination ( D63 + D98 )
     U32 d46Level;                       ///< Spent dialysate level
 } DD_LEVEL_DATA_T;
 
@@ -81,6 +82,7 @@
 void initLevels( void );
 void execLevels( void );
 LEVEL_STATE_T getLevelStatus( LEVEL_T levelId );
+LEVEL_STATE_T getBicarbChamberLevelStatus( void );
 
 BOOL testLevelsDataPublishIntervalOverride( MESSAGE_T *message );
 BOOL testLevelStatusOverride( MESSAGE_T *message );
Index: firmware/App/Services/FpgaDD.c
===================================================================
diff -u -rffd0828ba7d0c1ed6ae4624cfb2c502a2e7a203d -r98865667298d58132b40bceda1305b6bbc2204e0
--- firmware/App/Services/FpgaDD.c	(.../FpgaDD.c)	(revision ffd0828ba7d0c1ed6ae4624cfb2c502a2e7a203d)
+++ firmware/App/Services/FpgaDD.c	(.../FpgaDD.c)	(revision 98865667298d58132b40bceda1305b6bbc2204e0)
@@ -185,10 +185,9 @@
     U32 fpgaD4Temp;                             ///< Reg 614. Hydraulics primary heater temperature
     U32 fpgaD50Temp;                            ///< Reg 618. Trimmer heater temperature
     U16 fpgaD98LevelSensor;                     ///< Reg 622. Lower level Sensor
-    U08 fpgaRTDReadCnt;                         ///< Reg 623. Read count for all RTD sensors
     U16 fpgaD12MeasuredSpeed;                   ///< Reg 624. Fresh dialysate pump measured speed
     U16 fpgaD48MeasuredSpeed;                   ///< Reg 626. Spent dialysate pump measured speed
-    U08 fpga_UnUsed_2;                          ///< Reg 628. Not used
+    U08 fpgaRTDReadCnt;                          ///< Reg 628. Read count for all RTD sensors
     U08 fpgaD12D48PumpStatus;                   ///< Reg 629. Dialysate pumps Error status
     U16 fpgaD12CurrentFeedback;                 ///< Reg 630. Fresh dialysate pump current feedback
     U16 fpgaD48CurrentFeedback;                 ///< Reg 632. Spent dialysate pump current feedback