diff --git a/TBF/BenchControl/Elde/StartMeasurementOp.cs b/TBF/BenchControl/Elde/StartMeasurementOp.cs
index 65e0e2142..cecca194f 100644
--- a/TBF/BenchControl/Elde/StartMeasurementOp.cs
+++ b/TBF/BenchControl/Elde/StartMeasurementOp.cs
@@ -15,6 +15,7 @@ namespace TBF.BenchControl.Elde
 		readonly ControlBoardDev controlBoard;
 		readonly Elde.RegulValve.RegulValve regulValve;
 		readonly int regulValveNr;
+        readonly int regulValveStableTime;
 		readonly int flowMeterNr;
 		readonly float nominalFlow;
 		readonly float reqFlowLo;
@@ -80,10 +81,17 @@ namespace TBF.BenchControl.Elde
 
 			if (outputPath.RegulValve is Elde.RegulValve.RegulValve)
 			{
-				regulValve = outputPath.RegulValve as Elde.RegulValve.RegulValve;
-				regulValveNr = this.regulValve.Idx1;
-			}
-			else if (!(outputPath.RegulValve is Dummy.RegulValve.RegulValve))
+                Elde.RegulValve.RegulValve rv = outputPath.RegulValve as Elde.RegulValve.RegulValve;
+                regulValveNr = rv.Idx1;
+                regulValveStableTime = rv.StableTime;
+            }
+            else if (outputPath.RegulValve is Elde.RegulValveCoax.RegulValve)
+            {
+                Elde.RegulValveCoax.RegulValve rv = outputPath.RegulValve as Elde.RegulValveCoax.RegulValve;
+                regulValveNr = rv.Idx1;
+                regulValveStableTime = rv.StableTime;
+            }
+            else if (!(outputPath.RegulValve is Dummy.RegulValve.RegulValve))
 			{
 				throw new ArgumentNullException("Regulation valve is not compatible with Elde Control Board");
 			}
@@ -183,7 +191,7 @@ namespace TBF.BenchControl.Elde
                 float freqHi = 2000.0f * reqFlowHi / nominalFlow;
                 controlBoard.ValveMove(regulValveNr, RegulValveMode.TargetFrequency,
                                        new float[2] { freqLo, freqHi },
-                                       regulValve.StableTime);
+                                       regulValveStableTime);
 
                 opState = OpState.OpCompleted;
                 return Event.None;