diff --git a/src/calng/corrections/PnccdCorrection.py b/src/calng/corrections/PnccdCorrection.py
index d3563c5c47a75990c541c838f40ef7405466eff4..cfadb76bfb9f22391c1cecd49b77ee1d7fb9d709 100644
--- a/src/calng/corrections/PnccdCorrection.py
+++ b/src/calng/corrections/PnccdCorrection.py
@@ -82,10 +82,10 @@ class PnccdCalcatFriend(base_calcat.BaseCalcatFriend):
 
         (
             BOOL_ELEMENT(schema)
-            .key("constantParameters.useBiasVoltage")
-            .displayedName("Use bias voltage parameter")
+            .key("constantParameters.ignoreBiasVoltage")
+            .displayedName("Ignore bias voltage parameter")
             .assignmentOptional()
-            .defaultValue(False)
+            .defaultValue(True)
             .reconfigurable()
             .commit(),
 
@@ -121,7 +121,7 @@ class PnccdCalcatFriend(base_calcat.BaseCalcatFriend):
             .commit(),
         )
 
-        managed_keys.add("constantParameters.useBiasVoltage")
+        managed_keys.add("constantParameters.ignoreBiasVoltage")
         managed_keys.add("constantParameters.integrationTime")
         managed_keys.add("constantParameters.gainSetting")
         managed_keys.add("constantParameters.sourceEnergy")
@@ -132,7 +132,7 @@ class PnccdCalcatFriend(base_calcat.BaseCalcatFriend):
     def dark_condition(self):
         res = base_calcat.OperatingConditions()
         res["Memory cells"] = self._get_param("memoryCells")
-        if self._get_param("useBiasVoltage"):
+        if not self._get_param("ignoreBiasVoltage"):
             res["Sensor Bias Voltage"] = self._get_param("biasVoltage")
         res["Pixels X"] = self._get_param("pixelsX")
         res["Pixels Y"] = self._get_param("pixelsY")