Index: firmware/App/Drivers/PressureSensor.c
===================================================================
diff -u -r3a5cc585b69ffa194e3601a005915d23b48bd865 -r7e4bcfd25226dcac849ba52f417fd08865d04c2c
--- firmware/App/Drivers/PressureSensor.c	(.../PressureSensor.c)	(revision 3a5cc585b69ffa194e3601a005915d23b48bd865)
+++ firmware/App/Drivers/PressureSensor.c	(.../PressureSensor.c)	(revision 7e4bcfd25226dcac849ba52f417fd08865d04c2c)
@@ -33,6 +33,7 @@
 #define COUNTS_TO_MILLI_BAR                         100                                                 ///< Counts to milli-bar conversion.
 #define BAR_TO_MMHG                                 ( 750.062F )                                        ///< Conversion factor for converting bar to mmHg.
 #define PRES_SENSORS_READ_ERR_MAX_CNT               0xFF                                                ///< Pressure sensor read and error max count value
+#define PRES_MIN_PSI_ALPHA                          0.0F
 #define PRES_MIN_PSI                                -14.5038F                                           ///< Minimum value for PSI conversion
 #define HIGH_PRES_MAX_PSI                           145.038F                                            ///< Maximum range of pressure sensors (in PSI)
 
@@ -99,12 +100,12 @@
     // Update and convert raw pressures to mmHg
     currentPressureReadings[ M1_PRES ].data = convertPressureReading( getFPGAM1RawPressure(), PRES_MIN_PSI, HIGH_PRES_MAX_PSI );
     currentPressureReadings[ M3_PRES ].data = convertPressureReading( getFPGAM3RawPressure(), PRES_MIN_PSI, HIGH_PRES_MAX_PSI );
-    currentPressureReadings[ P8_PRES ].data = convertPressureReading( getFPGAP8RawPressure(), PRES_MIN_PSI, HIGH_PRES_MAX_PSI );
+    currentPressureReadings[ P8_PRES ].data = convertPressureReading( getFPGAP8RawPressure(), PRES_MIN_PSI_ALPHA, HIGH_PRES_MAX_PSI );
     currentPressureReadings[ P13_PRES ].data = convertPressureReading( getFPGAP13RawPressure(), PRES_MIN_PSI, HIGH_PRES_MAX_PSI );
     currentPressureReadings[ P17_PRES ].data = convertPressureReading( getFPGAP17RawPressure(), PRES_MIN_PSI, HIGH_PRES_MAX_PSI );
-    currentPressureReadings[ X1_PRES ].data = convertPressureReading( getFPGAX1RawPressure(), PRES_MIN_PSI, HIGH_PRES_MAX_PSI );
+    currentPressureReadings[ X1_PRES ].data = convertPressureReading( getFPGAX1RawPressure(), PRES_MIN_PSI_ALPHA, HIGH_PRES_MAX_PSI );
     currentPressureReadings[ X2_PRES ].data = convertPressureReading( getFPGAX2RawPressure(), PRES_MIN_PSI, HIGH_PRES_MAX_PSI );
-    currentPressureReadings[ X3_PRES ].data = convertPressureReading( getFPGAX3RawPressure(), PRES_MIN_PSI, HIGH_PRES_MAX_PSI );
+    currentPressureReadings[ X3_PRES ].data = convertPressureReading( getFPGAX3RawPressure(), PRES_MIN_PSI_ALPHA, HIGH_PRES_MAX_PSI );
     currentPressureReadings[ X4_PRES ].data = convertPressureReading( getFPGAX4RawPressure(), PRES_MIN_PSI, HIGH_PRES_MAX_PSI );
 
     // Update and convert raw pressure sensor temperatures to deg C