Index: firmware/App/Controllers/PresOccl.c
===================================================================
diff -u -re4f2159406af470f7116c4d8ac510806261cb2dc -r510c62da033207630341774dd097ac7efef862fb
--- firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision e4f2159406af470f7116c4d8ac510806261cb2dc)
+++ firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision 510c62da033207630341774dd097ac7efef862fb)
@@ -77,8 +77,11 @@
 #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_OCCL_OFFSET_MMHG    ( 50.0F )                                       ///< Venous pressure occlusion threshold offset from max alarm limit (in mmHg).
-#define VENOUS_PRES_AT_FILL_DELAY_FACTOR    ( 50000 )                                       ///< Venous pressure low exemption delay (in task intervals) conversion factor (from Qb) following an air trap fill.
+#define VENOUS_PRES_AT_FILL_DELAY_MAX_BLOOD_VOL_ML    ( 41.667F )                           ///< Venous pressure low exemption delay after air trap fill maximum blood volume (in mL).
 
+/// Venous pressure low exemption period (in task intervals) conversion factor (from Qb in mL/min) following an air trap fill.
+static const U32 VENOUS_PRES_AT_FILL_DELAY_FACTOR = (U32)( VENOUS_PRES_AT_FILL_DELAY_MAX_BLOOD_VOL_ML * (F32)SEC_PER_MIN * ( (F32)MS_PER_SECOND / (F32)TASK_GENERAL_INTERVAL ) );
+
 #define PSI_TO_MMHG                         ( 51.7149F )                                    ///< Conversion factor for converting PSI to mmHg.
 
 #define VENOUS_PRESSURE_NORMAL_OP           0                                               ///< Venous pressure status bits indicate normal operation.