Index: firmware/App/Controllers/PresOccl.c
===================================================================
diff -u -r5990682f801986ab67bf7383dab54fdcfaf35b0c -rf54c5969742cc36bdb68c439b2fe37fd413d326c
--- firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision 5990682f801986ab67bf7383dab54fdcfaf35b0c)
+++ firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision f54c5969742cc36bdb68c439b2fe37fd413d326c)
@@ -79,7 +79,7 @@
 #define VENOUS_PRESSURE_MAX_MMHG            ( 2000.0F )                                     ///< Maximum venous pressure reading (in mmHg) for range check.
 #define VENOUS_PRESSURE_MIN_MMHG            ( -1500.0F )                                    ///< Minimum venous pressure reading (in mmHg) for range check.
 #define VENOUS_PRESSURE_LIMIT_MAX_MMHG      ( 400.0F )                                      ///< Maximum venous pressure limit (in mmHg).
-#define VENOUS_PRESSURE_LIMIT_MIN_MMHG      ( 20.0F )                                       ///< Minimum venous pressure limit (in mmHg).
+#define VENOUS_PRESSURE_LIMIT_MIN_MMHG      (  0.0F )                                       ///< Minimum venous pressure limit (in mmHg).
 #define VENOUS_PRESSURE_OCCL_OFFSET_MMHG    ( 50.0F )                                       ///< Venous pressure occlusion threshold offset from max alarm limit (in mmHg).
 #define VENOUS_PRESSURE_EXEMPTION_PERIOD    ( ( 2 * MS_PER_SECOND ) /  \
                                                TASK_GENERAL_INTERVAL )                      ///< Venous pressure low exemption period (in task interval) after fill for all blood flow rate