Index: firmware/App/Modes/Prime.c
===================================================================
diff -u -ra6308f42594f03f4ef666cc858fd5432ad7ea63d -rdb1cea8cb5ab1a052babf36d242ed90622a014f9
--- firmware/App/Modes/Prime.c	(.../Prime.c)	(revision a6308f42594f03f4ef666cc858fd5432ad7ea63d)
+++ firmware/App/Modes/Prime.c	(.../Prime.c)	(revision db1cea8cb5ab1a052babf36d242ed90622a014f9)
@@ -62,7 +62,8 @@
 #define PRIME_DIALYSATE_BYPASS_TIME_LIMIT                   ( 8 * MS_PER_SECOND )                              ///< Time limit for priming dialysate bypass circuit.
 #define STEADY_VOLUME_COUNT_SEC                             ( 10000 / LOAD_CELL_STEADY_VOLUME_SAMPLING_TIME )  ///< Counter must be greater than 10 seconds before steady volume is true.
 #define STEADY_VOLUME_DIALYSATE_PRIME_TIME_LIMIT_MS         ( 55 * MS_PER_SECOND )                             ///< Time in msec for the reservoir volume to stabilize during dialysate prime state.
-#define STEADY_VOLUME_BYPASS_PRIME_TIME_LIMIT_MS            ( 25 * MS_PER_SECOND )                             ///< Time in msec for the reservoir volume to stabilize during bypass dialysate prime state.
+#define STEADY_VOLUME_BYPASS_PRIME_TIME_LIMIT_MS            ( 62 * MS_PER_SECOND )                             ///< Time in msec for the reservoir volume to stabilize during bypass dialysate prime state.
+#define STEADY_VOLUME_BYPASS_PRIME_HISTERESIS_ML            ( 0.3F )                                           ///< mL of histeresis for the steady state check that determines when bypass line is primed.
 
 #define VENOUS_PRESSURE_BUBBLE_CLEAR_MAX_MMHG               ( 200.0F )                                         ///< Maximum venous pressure reading (in mmHg) for bubble clear.
 #define BUBBLE_CLEAR_WAIT_TIME_INITIAL_MS                   ( 10 * MS_PER_SECOND )                             ///< Time in msec to wait for initial bubble clear pressure.
@@ -933,7 +934,7 @@
         {
             F32 const currentReservoirVolume = getLoadCellWeight( LOAD_CELL_RESERVOIR_2_PRIMARY );
 
-            if ( currentReservoirVolume >= minimumReservoirVolume )
+            if ( currentReservoirVolume >= ( minimumReservoirVolume - STEADY_VOLUME_BYPASS_PRIME_HISTERESIS_ML ) )
             {
                 if ( ++steadyVolumeCount >= STEADY_VOLUME_COUNT_SEC )
                 {
@@ -943,9 +944,12 @@
             }
             else
             {
-                minimumReservoirVolume = currentReservoirVolume;
                 steadyVolumeCount = 0;
             }
+            if ( currentReservoirVolume < minimumReservoirVolume )
+            {
+                minimumReservoirVolume = currentReservoirVolume;
+            }
 
             steadyVolumeSamplingStartTime = getMSTimerCount();   // re-armed the timer for the next 1 second iteration
         }