Index: firmware/App/Controllers/BloodFlow.c
===================================================================
diff -u -r68ee5d128b86860fac265d5ea25600bed9327077 -r7350aa8f5e25799f294433fea4d98dd23c4df642
--- firmware/App/Controllers/BloodFlow.c	(.../BloodFlow.c)	(revision 68ee5d128b86860fac265d5ea25600bed9327077)
+++ firmware/App/Controllers/BloodFlow.c	(.../BloodFlow.c)	(revision 7350aa8f5e25799f294433fea4d98dd23c4df642)
@@ -76,7 +76,6 @@
 #define BP_MAX_MOTOR_SPEED_ERROR_RPM        300.0F          ///< Maximum difference in speed between measured and commanded RPM.
 #define BP_MAX_MOTOR_SPEED_VS_TRGT_DIFF_PCT 0.15F           ///< Maximum motor speed vs target difference in percent.
 
-
 /// Persist time (in ms) for motor off error condition.
 static const U32 BP_OFF_ERROR_PERSIST             = ( 5 * MS_PER_SECOND );
 /// Persist time (in ms) motor speed error condition.
@@ -1169,7 +1168,7 @@
         F32 measRotorSpeed = fabs( getMeasuredBloodPumpRotorSpeed() );
         F32 measMotorSpeedInRotorRPM = measMotorSpeed / BP_GEAR_RATIO;
         F32 deltaRotorSpeed = fabs( measRotorSpeed - measMotorSpeedInRotorRPM );
-        F32 measMotorSpeedDeltaPct = deltaRotorSpeed / measMotorSpeedInRotorRPM;
+        F32 measMotorSpeedDeltaPct = fabs( deltaRotorSpeed / measMotorSpeedInRotorRPM );
 
         // Check measured motor speed vs. commanded motor speed while controlling to target
         if ( ( TRUE == isPersistentAlarmTriggered( ALARM_ID_BLOOD_PUMP_MOTOR_SPEED_CHECK,