diff --git a/cfg/dilsc.cfg b/cfg/dilsc.cfg
index c2bf7bf..b568b23 100644
--- a/cfg/dilsc.cfg
+++ b/cfg/dilsc.cfg
@@ -119,6 +119,12 @@ description = pressure on the back side of the pump
 slot = P4
 io = triton
 
+[p_ovc]
+class = secop_psi.mercury.PressureSensor
+description = outer vacuum pressure
+slot = P6
+io = triton
+
 #[itc]
 #class = secop_psi.mercury.IO
 #description = connection to MercuryiTC
@@ -243,8 +249,8 @@ description = vector field
 x = mfx
 y = mfy
 z = mfz
-sphere_radius = 0.06
-cylinders = ((0.023, 0.52), (0.045, 0.08))
+sphere_radius = 0.6
+cylinders = ((0.23, 5.2), (0.45, 0.8))
 
 [mfx]
 class = secop_psi.ips_mercury.SimpleField
diff --git a/secop/modules.py b/secop/modules.py
index db6d296..1f5e578 100644
--- a/secop/modules.py
+++ b/secop/modules.py
@@ -46,6 +46,14 @@ Done = UniqueObject('Done')
 indicating that the setter is triggered already"""
 
 
+class DummyLock:
+    def __enter__(self):
+        return self
+
+    def __exit__(self, *args, **kwds):
+        return True
+
+
 class HasAccessibles(HasProperties):
     """base class of Module
 
@@ -327,6 +335,7 @@ class Module(HasAccessibles):
         self.initModuleDone = False
         self.startModuleDone = False
         self.remoteLogHandler = None
+        # self.accessLock = self.updateLock = DummyLock()
         self.accessLock = threading.RLock()  # for read_* / write_* methods
         self.updateLock = threading.RLock()  # for announceUpdate
         self.polledModules = []  # modules polled by thread started in self.startModules
diff --git a/secop_psi/dilsc.py b/secop_psi/dilsc.py
index bc9d493..f39a91a 100644
--- a/secop_psi/dilsc.py
+++ b/secop_psi/dilsc.py
@@ -31,7 +31,7 @@ INCREASE = 2
 
 
 class VectorField(HasStates, Vector, Drivable):
-    sphere_radius = Parameter('max. spehere', datatype=FloatRange(0, 0.7, unit='T'), readonly=True, default=0.6)
+    sphere_radius = Parameter('max. sphere', datatype=FloatRange(0, 0.7, unit='T'), readonly=True, default=0.6)
     cylinders = Parameter('allowed cylinders (list of radius and height)',
                           datatype=ArrayOf(TupleOf(FloatRange(0, 0.6, unit='T'), FloatRange(0, 5.2, unit='T')), 1, 9),
                           readonly=True, default=((0.23, 5.2), (0.45, 0.8)))