Index: firmware/App/Services/FpgaDD.c
===================================================================
diff -u -rae7a7f0dc06fd31a53b0db564d515ce4c39acf67 -rffd0828ba7d0c1ed6ae4624cfb2c502a2e7a203d
--- firmware/App/Services/FpgaDD.c	(.../FpgaDD.c)	(revision ae7a7f0dc06fd31a53b0db564d515ce4c39acf67)
+++ firmware/App/Services/FpgaDD.c	(.../FpgaDD.c)	(revision ffd0828ba7d0c1ed6ae4624cfb2c502a2e7a203d)
@@ -162,7 +162,7 @@
     U16 fpgaD43CondTemp;                        ///< Reg 576. D43 Temperature
     U08 fpgaD43CondReadCnt;                     ///< Reg 578. D43 successful read count
     U08 fpgaD43CondErrorCnt;                    ///< Reg 579. D43 error read count
-    U16 fpgaD63LevelSensor;                     ///< Reg 580. Level Sensor 1
+    U16 fpgaD63LevelSensor;                     ///< Reg 580. Upper level Sensor
     U16 fpgaD46LevelSensor;                     ///< Reg 582. Level Sensor 2
     U08 fpgaHallSensInputs;                     ///< Reg 584. Hall sensor Inputs
     U08 fpgaD42TxFIFOCnt;                       ///< Reg 585. Blood leak sensor transmit FIFO count
@@ -184,7 +184,7 @@
     U32 fpgaD1Temp;                             ///< Reg 610. Inlet heat exchanger temperature
     U32 fpgaD4Temp;                             ///< Reg 614. Hydraulics primary heater temperature
     U32 fpgaD50Temp;                            ///< Reg 618. Trimmer heater temperature
-    U16 fpgaD98LevelSensor;                     ///< Reg 622. Level Sensor
+    U16 fpgaD98LevelSensor;                     ///< Reg 622. Lower level Sensor
     U08 fpgaRTDReadCnt;                         ///< Reg 623. Read count for all RTD sensors
     U16 fpgaD12MeasuredSpeed;                   ///< Reg 624. Fresh dialysate pump measured speed
     U16 fpgaD48MeasuredSpeed;                   ///< Reg 626. Spent dialysate pump measured speed
@@ -2428,11 +2428,11 @@
 
 /*********************************************************************//**
  * @brief
- * The getFPGAD87PresRawPressure function gets transmembrane pressure sensor raw
- * pressure value.
+ * The getFPGAD87PresRawPressure function gets fresh dialysate post ultrafilter
+ * pressure sensor raw pressure value.
  * @details \b Inputs: fpgaSensorReadings.fpgaD87PresPressure
  * @details \b Outputs: none
- * @return Latest transmembrane pressure sensor raw pressure data
+ * @return Fresh dialysate post ultrafilter pressure sensor raw pressure data
  *************************************************************************/
 U16 getFPGAD87PresRawPressure( void )
 {
@@ -2441,11 +2441,11 @@
 
 /*********************************************************************//**
  * @brief
- * The getFPGAD87PresRawTemperature function gets transmembrane pressure sensor raw
- * temperature value.
+ * The getFPGAD87PresRawTemperature function gets fresh dialysate post ultrafilter
+ * pressure sensor raw temperature value.
  * @details \b Inputs: fpgaSensorReadings.fpgaD87PresTemp
  * @details \b Outputs: none
- * @return Latest transmembrane pressure sensor raw temperature data
+ * @return Fresh dialysate post ultrafilter pressure sensor raw temperature data
  *************************************************************************/
 U16 getFPGAD87PresRawTemperature( void )
 {
@@ -2754,11 +2754,11 @@
 
 /*********************************************************************//**
  * @brief
- * The getFPGAD63LevelSensor function gets the latest FPGA D63 level sensor
- * reading.
+ * The getFPGAD63LevelSensor function gets the latest FPGA D63 upper level
+ * sensor reading.
  * @details \b Inputs: fpgaSensorReadings.fpgaD63LevelSensor
  * @details \b Outputs: none
- * @return last FPGA D63 level sensor reading
+ * @return last FPGA D63 upper level sensor reading
  *************************************************************************/
 U16 getFPGAD63LevelSensor( void )
 {
@@ -2767,6 +2767,19 @@
 
 /*********************************************************************//**
  * @brief
+ * The getFPGAD98LevelSensor function gets the latest FPGA D98 lower level
+ * sensor reading.
+ * @details \b Inputs: fpgaSensorReadings.fpgaD98LevelSensor
+ * @details \b Outputs: none
+ * @return last FPGA D98 lower level sensor reading
+ *************************************************************************/
+U16 getFPGAD98LevelSensor( void )
+{
+    return fpgaSensorReadings.fpgaD98LevelSensor;
+}
+
+/*********************************************************************//**
+ * @brief
  * The getFPGAD46LevelSensor function gets the latest FPGA level sensor 2
  * reading.
  * @details \b Inputs: fpgaSensorReadings.fpgaD46LevelSensor
@@ -2869,10 +2882,10 @@
 
 /*********************************************************************//**
  * @brief
- * The getFPGAD99Temp function gets the trimmer heater temperature.
+ * The getFPGAD99Temp function gets the fresh dialysate temperature.
  * @details \b Inputs: fpgaSensorReadings
  * @details \b Outputs: none
- * @return trimmer heater temperature
+ * @return Fresh dialysate temperature
  *************************************************************************/
 U32 getFPGAD99Temp( void )
 {
@@ -3015,19 +3028,6 @@
 
 /*********************************************************************//**
  * @brief
- * The getFPGAD98LevelSensor function gets the latest FPGA D98 level sensor
- * reading.
- * @details \b Inputs: fpgaSensorReadings.fpgaD98LevelSensor
- * @details \b Outputs: none
- * @return last FPGA D98 level sensor reading
- *************************************************************************/
-U16 getFPGAD98LevelSensor( void )
-{
-    return fpgaSensorReadings.fpgaD98LevelSensor;
-}
-
-/*********************************************************************//**
- * @brief
  * The setFPGABloodLeakUARTControl function sets the blood leak sensor UART
  * control value.
  * @details \b Inputs: none