diff --git a/frappy_psi/dpm.py b/frappy_psi/dpm.py
index bf2dc509..488f2467 100644
--- a/frappy_psi/dpm.py
+++ b/frappy_psi/dpm.py
@@ -54,7 +54,7 @@ class DPM3(HasIO, Readable):
     ioClass = DPM3IO
 
     value = Parameter(datatype=FloatRange(unit='N'))
-    digits = Parameter('number of digits for value', IntRange(0, 5), initwrite=True, readonly=False)
+    digits = Parameter('number of digits for value', IntRange(0, 5), value=2, readonly=False)
     # Note: we have to treat the units properly.
     # We got an output of 150 for 10N. The maximal force we want to deal with is 100N,
     #   thus a maximal output of 1500. 10=150/f