diff --git a/frappy_psi/ACM1219.py b/frappy_psi/ACM1219.py
index 8479292..c5c7223 100644
--- a/frappy_psi/ACM1219.py
+++ b/frappy_psi/ACM1219.py
@@ -16,10 +16,10 @@ class BothChannels(HasIO, Readable):
     ioClass = ACM1219IO
 
     # modifying a property of inherited parameters (unit is propagated to the FloatRange datatype)
-    value = Parameter('output voltage',
+    value = Parameter('Capacitance 1 and 2, and VT',
                       StructOf(C1=FloatRange(0, 21.096, unit='pF'), C2=FloatRange(0, 21.096, unit='pF'), VT=FloatRange(-1, 1000, unit='')),
                       readonly=True)
-    channels_enabled = Parameter('channel 1 on or off', BoolType(), readonly=False)
+    channels_enabled = Parameter('channels on or off', BoolType(), readonly=False)
     _ch_enabled = False
 
     def read_value(self):
@@ -73,16 +73,16 @@ class Displacement(Readable):
 
     # modifying a property of inherited parameters (unit is propagated to the FloatRange datatype)
     value = Parameter('displacement', FloatRange(None, None, unit='um'), readonly=True)
-    alpha290K = Parameter('capacitor constant at 290 K', FloatRange(None, None, unit='um pF'), readonly=True)
-    d0 = Parameter('offset displacement', FloatRange(None, None, unit='um'), readonly=True)
-    Cp = Parameter('parallel capacitance', FloatRange(None, None, unit='pF'), readonly=True)
+    alpha290K = Parameter('capacitor constant at 290 K', FloatRange(None, None, unit='um pF'), readonly=False)
+    d0 = Parameter('offset displacement', FloatRange(None, None, unit='um'), readonly=False)
+    Cp = Parameter('parallel capacitance', FloatRange(None, None, unit='pF'), readonly=False)
     d0_curve = Parameter('calibration curve for offset displacement',
                       StructOf(a=FloatRange(None, None, unit='um'),
                                b=FloatRange(None, None, unit='um/K'),
                                c=FloatRange(None, None, unit='um/K^2'),
                                d=FloatRange(None, None, unit='um/K^3'),
                                e=FloatRange(None, None, unit='um/K^4'),),
-                      readonly=True)
+                      readonly=False)
 
     def read_value(self):
         # get temperature and capacitance
@@ -108,16 +108,16 @@ class Force(Readable):
 
     # modifying a property of inherited parameters (unit is propagated to the FloatRange datatype)
     value = Parameter('force', FloatRange(None, None, unit='N'), readonly=True)
-    alpha290K = Parameter('capacitor constant at 290 K', FloatRange(None, None, unit='N pF'), readonly=True)
-    f0 = Parameter('offset force', FloatRange(None, None, unit='N'), readonly=True)
-    Cp = Parameter('parallel capacitance', FloatRange(None, None, unit='pF'), readonly=True)
+    alpha290K = Parameter('capacitor constant at 290 K', FloatRange(None, None, unit='N pF'), readonly=False)
+    f0 = Parameter('offset force', FloatRange(None, None, unit='N'), readonly=False)
+    Cp = Parameter('parallel capacitance', FloatRange(None, None, unit='pF'), readonly=False)
     f0_curve = Parameter('calibration curve for offset force',
                       StructOf(a=FloatRange(None, None, unit='N'),
                                b=FloatRange(None, None, unit='N/K'),
                                c=FloatRange(None, None, unit='N/K^2'),
                                d=FloatRange(None, None, unit='N/K^3'),
                                e=FloatRange(None, None, unit='N/K^4'),),
-                      readonly=True)
+                      readonly=False)
 
     def read_value(self):
         # get temperature and capacitance