Index: firmware/App/Controllers/DGInterface.h
===================================================================
diff -u -rd558c3058a027d8f4407c7bb882505e30225a7f9 -rcbaa57803fa8359407a799fca0cde6ae2c486bd7
--- firmware/App/Controllers/DGInterface.h	(.../DGInterface.h)	(revision d558c3058a027d8f4407c7bb882505e30225a7f9)
+++ firmware/App/Controllers/DGInterface.h	(.../DGInterface.h)	(revision cbaa57803fa8359407a799fca0cde6ae2c486bd7)
@@ -8,7 +8,7 @@
 * @file    DGInterface.h
 *
 * @author  (last)      Dara Navaei
-* @date    (last)      07-Mar-2022
+* @date    (last)      13-Jul-2022
 *
 * @author  (original)  Sean
 * @date    (original)  08-Apr-2020
@@ -34,6 +34,8 @@
 
 #define DEFAULT_TARGET_FILL_FLOW_RATE_LPM   0.8F    ///< Default target fill flow rate in L/min.
 #define DRAIN_RESERVOIR_TO_VOLUME_ML        0       ///< Drain reservoir to this volume (in mL) during treatment.
+#define LOAD_CELL_PRIMARY_BACKUP_MAX_ALLOWED_DRIFT_GRAMS  10.0F  ///< Reservoir load cell drift difference allowed
+#define LOAD_CELL_ILLEGAL_WEIGHT_VALUE     -10000.0F ///< Initial value for Load Cells, known bad value
 
 /// DG Concentrate ratios data structure.
 typedef struct
@@ -151,6 +153,7 @@
 F32 getLoadCellWeight( LOAD_CELL_ID_T loadCellID );
 F32 getReservoirWeight( DG_RESERVOIR_ID_T resID );
 F32 getReservoirWeightLargeFilter( DG_RESERVOIR_ID_T resID );
+F32 getReservoirBackupWeightLargeFilter( DG_RESERVOIR_ID_T resID );
 F32 getDialysateTemperature( void );
 DG_DISINFECT_UI_STATES_T getDGDisinfectsStates( void );
 DG_MIXING_RATIOS_T getDGMixingRatios( void );