diff --git a/lasp/lasp_common.py b/lasp/lasp_common.py
index 3c3ec95..2bb9e74 100644
--- a/lasp/lasp_common.py
+++ b/lasp/lasp_common.py
@@ -99,12 +99,13 @@ class SIQtys:
 @dataclass
 class CalSetting:
     name: str
-    cal_value: float
+    cal_value_dB: float
+    cal_value_linear: float
     qty: Qty
 
 class CalibrationSettings:
-    one = CalSetting('94  dB SPL', 1.0, SIQtys.AP)
-    two = CalSetting('114 dB SPL', 10.0, SIQtys.AP)
+    one = CalSetting('94  dB SPL', 94.0 , 1.0, SIQtys.AP)
+    two = CalSetting('114 dB SPL', 114.0 , 10.0, SIQtys.AP)
 
     types = (one, two)
     default = one
@@ -120,12 +121,15 @@ class CalibrationSettings:
         """
         cb.clear()
         for ty in CalibrationSettings.types:
-            cb.addItem(f'{ty.name}')
+            cb.addItem(f'{ty.cal_value_dB}')
         cb.setCurrentIndex(CalibrationSettings.default_index)
 
     @staticmethod
     def getCurrent(cb):
-        return CalibrationSettings.types[cb.currentIndex()]
+        if cb.currentIndex() < len(CalibrationSettings.types):
+            return CalibrationSettings.types[cb.currentIndex()]
+        else:
+            return None
 
 lasp_appdir = appdirs.user_data_dir('Lasp', 'ASCEE')
 
diff --git a/lasp/lasp_measurement.py b/lasp/lasp_measurement.py
index 643b8d4..9699bf4 100644
--- a/lasp/lasp_measurement.py
+++ b/lasp/lasp_measurement.py
@@ -370,6 +370,8 @@ class Measurement:
         sensitivity is applied, converted to floating point acoustic
         pressure values [Pa]."""
 
+        print('TODO:  THIS SHOULD BE CHANGED, VERY INCONSISTENT AND CONFUSING API')
+
         blocks = self.rawData(block)
 
         # Apply scaling (sensitivity, integer -> float)
@@ -394,26 +396,6 @@ class Measurement:
         """
         return self._sens
 
-    def checkOverflow(self):
-        """Coarse check for overflow in measurement.
-
-        Return:
-            True if overflow is possible, else False
-        """
-
-        with self.file() as f:
-            for block in self.iterBlocks(f):
-                dtype = block.dtype
-                if dtype.kind == 'i':
-                    # minvalue = np.iinfo(dtype).min
-                    maxvalue = np.iinfo(dtype).max
-                    if np.max(np.abs(block)) >= 0.9*maxvalue:
-                        return True
-                else:
-                    # Cannot check for floating point values.
-                    return False
-            return False
-
     @sensitivity.setter
     def sensitivity(self, sens):
         """Set the sensitivity of the measurement in the file.
@@ -437,6 +419,27 @@ class Measurement:
             f.attrs['sensitivity'] = sens
         self._sens = sens
 
+    def checkOverflow(self):
+        """Coarse check for overflow in measurement.
+
+        Return:
+            True if overflow is possible, else False
+        """
+
+        with self.file() as f:
+            for block in self.iterBlocks(f):
+                dtype = block.dtype
+                if dtype.kind == 'i':
+                    # minvalue = np.iinfo(dtype).min
+                    maxvalue = np.iinfo(dtype).max
+                    if np.max(np.abs(block)) >= 0.9*maxvalue:
+                        return True
+                else:
+                    # Cannot check for floating point values.
+                    return False
+            return False
+
+
     def exportAsWave(self, fn=None, force=False, newsampwidth=None, normalize=True):
         """Export measurement file as wave. In case the measurement data is
         stored as floats, the values are scaled to the proper integer (PCM)