Index: firmware/App/Drivers/InternalADC.c
===================================================================
diff -u -r8467f8ff09e382e0991f14d02683080dc811e24e -r5a36a768d11cc597a36b894c1fb3a5e5590130f1
--- firmware/App/Drivers/InternalADC.c	(.../InternalADC.c)	(revision 8467f8ff09e382e0991f14d02683080dc811e24e)
+++ firmware/App/Drivers/InternalADC.c	(.../InternalADC.c)	(revision 5a36a768d11cc597a36b894c1fb3a5e5590130f1)
@@ -37,12 +37,12 @@
     INT_ADC_RO_PUMP_OUTLET_PRESSURE,    // 1
     INT_ADC_DRAIN_PUMP_OUTLET_PRESSURE, // 2
     INT_ADC_DRAIN_PUMP_INLET_PRESSURE,  // 3
-    INT_ADC_NOT_USED,                   // 4
+    INT_ADC_MAIN_24_VOLTS,              // 4
     INT_ADC_FPGA_1_8_VOLTS,             // 5
     INT_ADC_FPGA_1_VOLT,                // 6
     INT_ADC_SENSORS_3_3_VOLTS,          // 7
     INT_ADC_PROCESSOR_1_8_VOLTS,        // 8
-    INT_ADC_SENSORS_6_VOLTS,            // 9
+    INT_ADC_POWER_SUPPLY_GATE_DRIVER,   // 9
     INT_ADC_SENSORS_5_VOLTS,            // 10
     INT_ADC_LOGIC_5_VOLTS,              // 11
     INT_ADC_3_3_VOLTS,                  // 12
@@ -59,6 +59,35 @@
     INT_ADC_POWER_SUPPLY_2_THERMISTOR,  // 23
 };
 
+const F32 ADC_CHANNEL_READ_TO_UNITS[ NUM_OF_INT_ADC_CHANNELS ] =
+{
+    0.0,        //     - INT_ADC_NOT_USED
+    0.06438104, // PSIA- INT_ADC_RO_PUMP_INLET_PRESSURE
+    0.06438104, // PSIA- INT_ADC_RO_PUMP_OUTLET_PRESSURE
+    0.06438104, // PSIA- INT_ADC_DRAIN_PUMP_OUTLET_PRESSURE
+    0.06438104, // PSIA- INT_ADC_DRAIN_PUMP_INLET_PRESSURE
+    1.0,        // ?   - INT_ADC_CONCENTRATE_PUMP_1   // TODO - get units and conversion for these 2 channels
+    1.0,        // ?   - INT_ADC_CONCENTRATE_PUMP_2
+    0.00700441, // V   - INT_ADC_PRIMARY_HEATER_24_VOLTS (varies inversely with PWM for secondary element)
+    0.00763285, // V   - INT_ADC_TRIMMER_HEATER_24_VOLTS (varies inversely with PWM)
+    0.001221,   // V   - INT_ADC_BOARD_THERMISTOR
+    0.0007326,  // V   - INT_ADC_FPGA_1_8_VOLTS
+    0.0007326,  // V   - INT_ADC_FPGA_1_VOLT
+    0.0007326,  // V   - INT_ADC_PROCESSOR_1_8_VOLTS
+    0.0007326,  // V   - INT_ADC_PROCESSOR_1_2_VOLTS
+    0.00117296, // V   - INT_ADC_SENSORS_3_3_VOLTS
+    0.0014652,  // V   - INT_ADC_SENSORS_5_VOLTS
+    0.00700441, // V   - INT_ADC_MAIN_24_VOLTS
+    0.0014652,  // V   - INT_ADC_LOGIC_5_VOLTS
+    0.00117296, // V   - INT_ADC_3_3_VOLTS
+    0.00117296, // V   - INT_ADC_REFERENCE_VOLTAGE (3V)
+    0.0014652,  // V   - INT_ADC_REF_IN1 (3V)
+    0.0014652,  // V   - INT_ADC_REF_IN2 (3V)
+    0.001221,   // V   - INT_ADC_POWER_SUPPLY_1_THERMISTOR
+    0.001221,   // V   - INT_ADC_POWER_SUPPLY_2_THERMISTOR
+    0.00304608  // V   - INT_ADC_POWER_SUPPLY_GATE_DRIVER (5V)
+};
+
 // ********** private data **********
 
 static adcData_t adcRawReadings[ NUM_OF_INT_ADC_CHANNELS ];               ///< Buffer holds latest adc channel readings.
@@ -185,4 +214,29 @@
     return result;
 }
 
+/*********************************************************************//**
+ * @brief
+ * The getIntADCVoltageConverted function gets the latest average voltage
+ * (converted per transfer function) for a given channel.
+ * @details Inputs: adcReadingsAvgs[], ADC_CHANNEL_READ_TO_UNITS[]
+ * @details Outputs: none
+ * @param channel adc channel to retrieve a converted voltage for
+ * @return average converted voltage for the given channel
+ *************************************************************************/
+F32 getIntADCVoltageConverted( INT_ADC_CHANNEL_T channel )
+{
+    F32 result = 0.0;
+
+    if ( channel < NUM_OF_INT_ADC_CHANNELS )
+    {
+        result = (F32)adcReadingsAvgs[ channel ] * ADC_CHANNEL_READ_TO_UNITS[ channel ];
+    }
+    else
+    {
+        SET_ALARM_WITH_2_U32_DATA( ALARM_ID_DG_SOFTWARE_FAULT, SW_FAULT_ID_INT_ADC_INVALID_CHANNEL_REQUESTED, channel )
+    }
+
+    return result;
+}
+
 /**@}*/