Index: firmware/App/Controllers/ConductivitySensors.h
===================================================================
diff -u -rdf0a0b9ce1414b00b381e516714f9089d8e4ae21 -re6f3a632890f96a5aa282922d11df148bdd06587
--- firmware/App/Controllers/ConductivitySensors.h	(.../ConductivitySensors.h)	(revision df0a0b9ce1414b00b381e516714f9089d8e4ae21)
+++ firmware/App/Controllers/ConductivitySensors.h	(.../ConductivitySensors.h)	(revision e6f3a632890f96a5aa282922d11df148bdd06587)
@@ -32,6 +32,17 @@
 
 // ********** public definitions **********
 
+#define MIN_ACID_CONCENTRATE_CONDUCTIVITY               11000                                       ///< Minimum conductivity for acid concentrate.
+#define MAX_ACID_CONCENTRATE_CONDUCTIVITY               11850                                       ///< Maximum conductivity for acid concentrate.
+
+#define MIN_BICARB_CONCENTRATE_CONDUCTIVITY             2000                                        ///< Minimum conductivity for bicarbonate concentrate.
+#define MAX_BICARB_CONCENTRATE_CONDUCTIVITY             3000                                        ///< Maximum conductivity for bicarbonate concentrate.
+
+///< Minimum conductivity value for dialysate solution.
+#define MIN_DIALYSATE_CONDUCTIVITY                      ( MIN_ACID_CONCENTRATE_CONDUCTIVITY + MIN_BICARB_CONCENTRATE_CONDUCTIVITY )
+///< Maximum conductivity value for dialysate solution.
+#define MAX_DIALYSATE_CONDUCTIVITY                      ( MAX_ACID_CONCENTRATE_CONDUCTIVITY + MAX_BICARB_CONCENTRATE_CONDUCTIVITY )
+
 /// Enumeration of conductivity sensors.
 typedef enum ConductivitySensors
 {
@@ -62,10 +73,6 @@
 void checkInletWaterConductivity( void );
 void checkRORejectionRatio( void );
 
-BOOL isAcidConductivityInRange( void );
-BOOL isBicarbConductivityInRange( void );
-BOOL isDialysateConductivityInRange( void );
-
 F32 getConductivityValue( U32 sensorId );
 
 BOOL testSetConductivityOverride( U32 sensorId, F32 value );