diff --git a/labsw/__init__.py b/labsw/__init__.py
index 91523c0..d2a6d5c 100644
--- a/labsw/__init__.py
+++ b/labsw/__init__.py
@@ -1 +1 @@
-__version__ = '0.1.6.0'
+__version__ = '0.1.6.1'
diff --git a/labsw/io.py b/labsw/io.py
index 784c176..a58155f 100644
--- a/labsw/io.py
+++ b/labsw/io.py
@@ -20,8 +20,6 @@ def load_data_RH_logger(filepath, every=1):
     df = df.drop(columns='X')
     df = df.drop(np.arange(1))
 
-    df['dm_m'] = (df['weight'] - df['weight'].iloc[0]) / df['weight'].iloc[0]
-
     # Crop data
     df = df.reset_index()
     del df['index']
@@ -32,10 +30,19 @@ def load_data_RH_logger(filepath, every=1):
 
 def process_data_RH_logger(filepath, every):
     df = load_data_RH_logger(filepath, every=1)
+
+    # Variation
+    df['dm'] = df['weight'] - df['weight'].iloc[0]
+    df['dm_m'] = (df['weight'] - df['weight'].iloc[0]) / df['weight'].iloc[0]
+
+    # weight normalized between 0 and 1 begin to end
+    mf = df['dm_m'].tail(300).mean()
+    df['m_mf'] = df['dm_m'] / mf
+
     # Derivative
     delta = np.mean(df['time'].diff())
-    df['dmdt_SG'] = savgol_filter(df['weight'], window_length=10000, polyorder=1, deriv=1, delta=delta)
-    df['dmdt_diff'] = df['weight'].diff(periods=1000) / df['time'].diff(periods=1000)
+    df['dMdt_SG'] = savgol_filter(df['dm_m'], window_length=10000, polyorder=1, deriv=1, delta=delta)
+    df['dMdt_diff'] = df['dm_m'].diff(periods=1000) / df['time'].diff(periods=1000)
 
     h5path = os.path.splitext(filepath)[0]
     h5path += '-processed.h5'