diff --git a/python_src/lasp/lasp_common.py b/python_src/lasp/lasp_common.py
index c0c69ba..7a018fd 100644
--- a/python_src/lasp/lasp_common.py
+++ b/python_src/lasp/lasp_common.py
@@ -121,7 +121,7 @@ class SIQtys(Enum):
              unit_name='Pascal',
              unit_symb='Pa',
              level_unit=('dB SPL','dBPa'),
-             level_ref_name=('2 micropascal', '1 pascal',),
+             level_ref_name=('20 micropascal', '1 pascal',),
              level_ref_value=(P_REF, 1),
             cpp_enum = DaqChannel.Qty.AcousticPressure
             )
diff --git a/python_src/lasp/lasp_measurement.py b/python_src/lasp/lasp_measurement.py
index 9fb3614..c4cb4be 100644
--- a/python_src/lasp/lasp_measurement.py
+++ b/python_src/lasp/lasp_measurement.py
@@ -1148,7 +1148,7 @@ class Measurement:
                 raise RuntimeError("Illegal length of channelNames list given")
 
         if qtys is None:
-            qtys = [SIQtys.AP] * nchannels
+            qtys = [SIQtys.fromInt(1)] * nchannels # Acoustic pressure is default
         else:
             if len(qtys) != nchannels:
                 raise RuntimeError("Illegal length of qtys list given")