diff --git a/python/src/excalibur_detector/control/definitions.py b/python/src/excalibur_detector/control/definitions.py
index c971c50..1ccfe0d 100644
--- a/python/src/excalibur_detector/control/definitions.py
+++ b/python/src/excalibur_detector/control/definitions.py
@@ -15,7 +15,7 @@ class ExcaliburDefinitions(object):
     FEM_DEFAULT_CHIP_IDS = [1, 2, 3, 4, 5, 6, 7, 8]
 
     FEM_DAC_TARGET_VOLTAGES = {'gnd': 0.65, 'fbk': 0.9, 'cas': 0.85}
-    FEM_DAC_VOLTAGE_THRESHOLD = 0.005
+    FEM_DAC_VOLTAGE_THRESHOLD = 0.01
 
     # From page 23 Medipix III manual v19
     FEM_DAC_SENSE_CODES = {'gnd': 20, 'fbk': 22, 'cas' : 23}