diff --git a/TestBenchFramework/BenchControl/GenericDevices/IWaterMeter.cs b/TestBenchFramework/BenchControl/GenericDevices/IWaterMeter.cs
index 0e1b5fb43..da3084610 100644
--- a/TestBenchFramework/BenchControl/GenericDevices/IWaterMeter.cs
+++ b/TestBenchFramework/BenchControl/GenericDevices/IWaterMeter.cs
@@ -7,6 +7,8 @@ namespace TBF.BenchControl.GenericDevices
 {
 	public interface IWaterMeter : IComponent
 	{
+		void ClearData();
+
 		string Producer { get; }
 		float  Qn { get; }
 		string ApprovalInfo { get; }
diff --git a/TestBenchFramework/BenchControl/Sequences/MainSeq.cs b/TestBenchFramework/BenchControl/Sequences/MainSeq.cs
index d69a8965f..da172b1fa 100644
--- a/TestBenchFramework/BenchControl/Sequences/MainSeq.cs
+++ b/TestBenchFramework/BenchControl/Sequences/MainSeq.cs
@@ -226,8 +226,14 @@ namespace TBF.BenchControl.Sequences
 			StateMachine.LoadProcedure(false);
             if (StateMachine.Procedure == null) goto select_procedure;
 
-			StateMachine.LoadProcedureParams(StateMachine.Procedure);
+			///
+			/// Procedure selected at this point, a new batch was started
+			///
+			StateMachine.CycleStartTimeStamp = DateTime.Now;
+			foreach (var wm in WaterMeters) wm.ClearData();				/// Clean water meter data
 			ResetResults();
+
+			StateMachine.LoadProcedureParams(StateMachine.Procedure);
 			Bridge.OnProcedureSelected(this, new ProcedureSelectedEventArgs(StateMachine.Procedure));
 
 			/// Display 'Cycle Begin Form'
@@ -423,8 +429,6 @@ namespace TBF.BenchControl.Sequences
 
             if (selection == Selection.Cycle)
             {
-				StateMachine.CycleStartTimeStamp = DateTime.Now;
-
 				TimeEstimateTotal = 0;
 				for (int i = simultWithPurgingCount; i < StateMachine.Tests.Count - simultWithEvacuationCount; i++)
 				{
diff --git a/TestBenchFramework/BenchControl/WaterMeters/WaterMeter/WaterMeter.cs b/TestBenchFramework/BenchControl/WaterMeters/WaterMeter/WaterMeter.cs
index d59f27171..3e641fca0 100644
--- a/TestBenchFramework/BenchControl/WaterMeters/WaterMeter/WaterMeter.cs
+++ b/TestBenchFramework/BenchControl/WaterMeters/WaterMeter/WaterMeter.cs
@@ -73,13 +73,23 @@ namespace TBF.BenchControl.WaterMeters.WaterMeter
 
 		public WaterMeter()
 		{
+			ClearData();
 		}
 
 		public WaterMeter(WaterMeterCfg cfg)
 			: base(cfg)
 		{
+			ClearData();
 			waterMeterCfg = cfg;
 			log.Debug(this.ToString());
 		}
+
+		public void ClearData()
+		{
+			serialNr = string.Empty;
+			endState = string.Empty;
+			beginState = string.Empty;
+			disabled = false;
+		}
 	}
 }
diff --git a/TestBenchFramework/BenchControl/WaterMeters/iPerl/WaterMeter.cs b/TestBenchFramework/BenchControl/WaterMeters/iPerl/WaterMeter.cs
index 6fdfda9c5..d2b271f19 100644
--- a/TestBenchFramework/BenchControl/WaterMeters/iPerl/WaterMeter.cs
+++ b/TestBenchFramework/BenchControl/WaterMeters/iPerl/WaterMeter.cs
@@ -55,9 +55,8 @@ namespace TBF.BenchControl.WaterMeters.iPerl
                 if (ConfigStruct != null) return configStruct.PCBNumber2String();
                 else return string.Empty;
             }
-			set { serialNr = value; }
+			set { }
 		}
-		string serialNr;
 
 		public string EndState
 		{
@@ -106,7 +105,7 @@ namespace TBF.BenchControl.WaterMeters.iPerl
         CalibrationStruct calibrationStruct;
 
         public ushort OriginalCalibFactor;
-		public ushort CalibrationFactor { get { return CalibrationStruct.Calibration; } }
+		public ushort CalibrationFactor { get { return (CalibrationStruct != null) ? CalibrationStruct.Calibration : (ushort)0; } }
 
         public double Q2ErrorWOCorrection;
         public bool Q2CorrectionDone;
@@ -266,35 +265,47 @@ namespace TBF.BenchControl.WaterMeters.iPerl
 
 		public WaterMeter()
 		{
-            disabled = false;
-            commFailed = false;
+			ClearData();
 		}
 
 		public WaterMeter(WaterMeterCfg cfg)
 			: base(cfg)
 		{
-            disabled = false;
-            commFailed = false;
+			ClearData();
 
 			iPerlCfg = cfg;
 			log.Debug(this.ToString());
 		}
 
-        int NrFormName(string name)
-        {
-            int len = name.Length;
-            if (len < 2) return 0;
+		/// <summary>
+		/// Clear data related to a specific water meter
+		/// </summary>
+		public void ClearData()
+		{
+			disabled = false;
+			commFailed = false;
+			endState = string.Empty;
+			beginState = string.Empty;
 
-            int loNr = (int)name[len - 1] - (int)'0';
-            int hiNr = (int)name[len - 2] - (int)'0';
-            if (hiNr < 1 || hiNr > 4) hiNr = 0;
+			configStruct = null;
+			calibrationStruct = null;
 
-            return 10 * hiNr + loNr;
-        }
+			LastTestResult = null;
+			NominalTestFlow = 0;
+
+	        OriginalCalibFactor = 0;
+			Q2ErrorWOCorrection = 0;
+			Q2CorrectionDone = false;
+			CurrentQ2Correction = 0;
+			
+			optoDataCount = 0;
+		}
 
         public void Initialize()
         {
-            if (DebugLevel == Entities.DebugMode.Normal)
+			ClearData();
+
+			if (DebugLevel == Entities.DebugMode.Normal)
             {
 				optoSerialPortParsingEnabled = false;
 
@@ -787,5 +798,17 @@ namespace TBF.BenchControl.WaterMeters.iPerl
                 case MeterType.DN40: return 16.0;
             }
         }
-    }
+
+		int PositionNrFormWMName(string name)
+		{
+			int len = name.Length;
+			if (len < 2) return 0;
+
+			int loNr = (int)name[len - 1] - (int)'0';
+			int hiNr = (int)name[len - 2] - (int)'0';
+			if (hiNr < 1 || hiNr > 4) hiNr = 0;
+
+			return 10 * hiNr + loNr;
+		}
+	}
 }