Index: firmware/App/Controllers/PresOccl.c
===================================================================
diff -u -r8121bf62592934e01f365a973ac813c3d4748cda -r887e9a3dfbce1255c6469d33e49afe191af21d25
--- firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision 8121bf62592934e01f365a973ac813c3d4748cda)
+++ firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision 887e9a3dfbce1255c6469d33e49afe191af21d25)
@@ -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