diff --git a/Common/.vs/config/applicationhost.config b/Common/.vs/config/applicationhost.config
index 40cde372..1b9332b4 100644
--- a/Common/.vs/config/applicationhost.config
+++ b/Common/.vs/config/applicationhost.config
@@ -155,7 +155,7 @@
 			</site>
             <site name="MeterProcessState" id="2">
                 <application path="/" applicationPool="Clr4IntegratedAppPool">
-                    <virtualDirectory path="/" physicalPath="C:\Users\drabesch_ro\Repo\lab\la_operations\laa_production\Common\Service\MeterProcessState" />
+                    <virtualDirectory path="/" physicalPath="D:\Projekte\SENSUS_GitLab\laa_production\Common\Service\MeterProcessState" />
                 </application>
                 <bindings>
                     <binding protocol="http" bindingInformation="*:56011:localhost" />
diff --git a/Common/Hardware/WaterMeter/MagFlux/DataPackages/DataPackages.csproj b/Common/Hardware/WaterMeter/MagFlux/DataPackages/DataPackages.csproj
index af022c81..74a42b3b 100644
--- a/Common/Hardware/WaterMeter/MagFlux/DataPackages/DataPackages.csproj
+++ b/Common/Hardware/WaterMeter/MagFlux/DataPackages/DataPackages.csproj
@@ -215,6 +215,7 @@
     <Compile Include="..\..\..\..\.shared\SharedAssemblyInfo.cs">
       <Link>Properties\SharedAssemblyInfo.cs</Link>
     </Compile>
+    <Compile Include="DataTypes\Calibration.cs" />
     <Compile Include="EventArguments\MagFluxFlowDataEventArgs.cs" />
     <Compile Include="EventArguments\RequestResponseDataEventArgs.cs" />
     <Compile Include="MeasurementRecords\MagFluxRecord.cs" />
@@ -250,6 +251,7 @@
   <ItemGroup>
     <None Include="packages.config" />
   </ItemGroup>
+  <ItemGroup />
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
diff --git a/Common/Hardware/WaterMeter/MagFlux/DataPackages/DataTypes/Calibration.cs b/Common/Hardware/WaterMeter/MagFlux/DataPackages/DataTypes/Calibration.cs
new file mode 100644
index 00000000..7a982ea8
--- /dev/null
+++ b/Common/Hardware/WaterMeter/MagFlux/DataPackages/DataTypes/Calibration.cs
@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace Xylem.Common.Hardware.WaterMeter.MagFlux.DataPackages.DataTypes
+{
+    /// <summary>
+    /// Used as structured calibration converter from liters per second to
+    /// cubic meters per hour and vice versa
+    /// </summary>
+    public struct Calibration
+    {
+        /// <summary>
+        /// Reference meter flow rate - unit free for use
+        /// </summary>
+        public Single refFlowRate;
+        /// <summary>
+        /// DUT meter flow rate - unit free for use
+        /// </summary>
+        public Single dutFlowRate;
+    }
+}
diff --git a/Common/Hardware/WaterMeter/MagFlux/MagFluxCore/MagFluxMeter.cs b/Common/Hardware/WaterMeter/MagFlux/MagFluxCore/MagFluxMeter.cs
index 10b23d22..0618e143 100644
--- a/Common/Hardware/WaterMeter/MagFlux/MagFluxCore/MagFluxMeter.cs
+++ b/Common/Hardware/WaterMeter/MagFlux/MagFluxCore/MagFluxMeter.cs
@@ -12,6 +12,7 @@ using Xylem.Common.Hardware.Interfaces.Ports.SerialPorts;
 using Xylem.Common.Hardware.Interfaces.Protocols.ProtocolCore;
 using Xylem.Common.Hardware.Interfaces.Protocols.ProtocolCore.EventArguments;
 using Xylem.Common.Hardware.Interfaces.Protocols.TransmitProtocol;
+using Xylem.Common.Hardware.WaterMeter.MagFlux.DataPackages.DataTypes;
 using Xylem.Common.Hardware.WaterMeter.MagFlux.Protocols.StreamingProtocol;
 using Xylem.Common.Hardware.WaterMeter.MagFlux.DataPackages.EventArguments;
 using Xylem.Common.Hardware.WaterMeter.MagFlux.DataPackages.MeasurementRecords;
@@ -36,11 +37,6 @@ namespace Xylem.Common.Hardware.WaterMeter.MagFlux.MagFluxCore
     {
         #region Variables and Properties
 
-        /// <summary>
-        /// Calibration points reference to DUT
-        /// </summary>
-        private List<CalibrationPoint> _calibPoints;
-
         /// <summary>
         ///     Mark the streaming catcher as active
         /// </summary>
@@ -960,21 +956,19 @@ namespace Xylem.Common.Hardware.WaterMeter.MagFlux.MagFluxCore
         /// <summary>
         /// Write calibration values to MagFlux
         /// </summary>
-        public void WriteCalibration(List<CalibrationPoint> calibPoints)
+        public void WriteCalibration(List<Calibration> calibrationsCmPerH)
         {
             _logger.Info($"Slot:{Slot} - Write calibration values to MagFlux");
-            _calibPoints = calibPoints;
-
-            RequestProtocol?.SetCalibrationPoints(_calibPoints);
+            RequestProtocol?.SetCalibrationPoints(calibrationsCmPerH);
         }
         /// <summary>
         /// Read calibration values to MagFlux
         /// </summary>
-        public void ReadCalibration(out List<CalibrationPoint> calibPoints)
+        public void ReadCalibration(out List<Calibration> calibrationsCmPerH)
         {
+            calibrationsCmPerH = null;
             _logger.Info($"Slot:{Slot} - Read calibration values from MagFlux");
-            RequestProtocol?.GetCalibrationPoints(out _calibPoints);
-            calibPoints = _calibPoints;
+            RequestProtocol?.GetCalibrationPoints(out calibrationsCmPerH);
         }
 
         /// <inheritdoc />
@@ -983,8 +977,6 @@ namespace Xylem.Common.Hardware.WaterMeter.MagFlux.MagFluxCore
             _logger.Info($"Slot:{Slot} - Init calibration and set calibration values of all channels to default");
             if (RequestProtocol == null)
                 return;
-            // first read out the current calibration points, those are used as container for overwriting
-            RequestProtocol.GetCalibrationPoints(out _calibPoints);
             if (RequestProtocol.PrepareDeviceForCalibration())
                 PreMeasurement();
         }
diff --git a/Common/Hardware/WaterMeter/MagFlux/Protocols/RequestProtocol/RequestProtocol.cs b/Common/Hardware/WaterMeter/MagFlux/Protocols/RequestProtocol/RequestProtocol.cs
index 760851c5..f457f8d9 100644
--- a/Common/Hardware/WaterMeter/MagFlux/Protocols/RequestProtocol/RequestProtocol.cs
+++ b/Common/Hardware/WaterMeter/MagFlux/Protocols/RequestProtocol/RequestProtocol.cs
@@ -6,6 +6,7 @@ using NLog;
 using Xylem.Common.Hardware.Interfaces.Ports.PortCore.EventArguments;
 using Xylem.Common.Hardware.Interfaces.Protocols.ProtocolCore;
 using Xylem.Common.Hardware.Interfaces.Protocols.ProtocolCore.EventArguments;
+using Xylem.Common.Hardware.WaterMeter.MagFlux.DataPackages.DataTypes;
 using Xylem.Common.Utils.Logging;
 using XYLEM.Device;
 
@@ -20,19 +21,22 @@ namespace Xylem.Common.Hardware.WaterMeter.MagFlux.Protocols.RequestProtocol
         private readonly ILogger _logger;
         private IMagFluxRequestProtocol _magFluxRequestProtocol;
 
-        public Int32 CalibrationPointsMax { get; } = 11;
+        private List<Calibration> _calibPointsCmPerH;
 
         /// <inheritdoc />
         public RequestProtocol(String ident) : base(ident)
         {
             _ident = ident;
             _magFluxRequestProtocol = new MagFlux6200();
+            _calibPointsCmPerH = new List<Calibration>();
             _logger = NLogHelper.CreateOrGetMultiLogger(_ident, "", "RequestProtocol", "MeterBase", "MeterBase");
         }
 
         /// <inheritdoc/>>
         public override void Dispose()
         {
+            _calibPointsCmPerH.Clear();
+            _calibPointsCmPerH = null;
             _magFluxRequestProtocol?.CloseConnection();
             _magFluxRequestProtocol = null;
             base.Dispose();
@@ -245,36 +249,82 @@ namespace Xylem.Common.Hardware.WaterMeter.MagFlux.Protocols.RequestProtocol
         }
 
         /// <summary>
-        /// Wrapper to get the calibration points from MagFlux
+        /// Wrapper to get the calibration points from MagFlux:
+        /// - Here the conversion from  to <see cref="CalibrationPoints"/> to <see cref="Calibration"/>
+        ///   will take place.
         /// </summary>
-        /// <param name="calibPoints"></param>
+        /// <param name="calibPointsCmPerH"></param>
         /// <returns></returns>
         /// <remarks date="2023-Mai-17" author="T.Wiedebusch">
         /// - Initial
         /// </remarks>
-        public Boolean GetCalibrationPoints(out List<CalibrationPoint> calibPoints)
+        public Boolean GetCalibrationPoints(out List<Calibration> calibPointsCmPerH)
         {
-            calibPoints = new List<CalibrationPoint>();
+            calibPointsCmPerH = new List<Calibration>();
             if (_magFluxRequestProtocol == null) return false;
+
             var retVal = _magFluxRequestProtocol.GetCalibrationPoints(out var calibrations);
-            calibPoints = calibrations?.calibrations?.ToList();
             _logger.Debug(retVal ? $"{_ident} MagFlux calibration successfully read" : 
                 $"{_ident} MagFlux calibration read failed!");
-            return retVal;
+
+            if (!retVal)
+                return false;
+            
+            // extract the single calibration points from container as ref and DUT in liters per second
+            var calibPoints = calibrations?.calibrations?.ToList();
+            if (calibPoints == null)
+                return false;
+
+            var calibConverter = new Calibration();
+            _calibPointsCmPerH?.Clear();
+
+            foreach (var cp in calibPoints)
+            {
+                // convert flow rate from liters per second to cubic meters per hour
+                calibConverter.refFlowRate = cp.ReferenceFlowRate_lps * 3.6f;
+                calibConverter.dutFlowRate = cp.ReportedFlowRate_lps * 3.6f;
+                _calibPointsCmPerH?.Add(calibConverter);
+            }
+
+            calibPointsCmPerH = _calibPointsCmPerH;
+            return true;
         }
 
         /// <summary>
         /// Wrapper to set the calibration points from MagFlux:
         /// - Calibration points have to be sorted ascending by request from MJK
+        /// - Here the conversion from <see cref="Calibration"/> to <see cref="CalibrationPoints"/>
+        ///   will take place.
         /// </summary>
-        /// <param name="calibPoints"></param>
+        /// <param name="calibPointsCmPerH"></param>
         /// <returns></returns>
         /// <remarks date="2023-Mai-30" author="T.Wiedebusch">
         /// - Initial
         /// </remarks>
-        public Boolean SetCalibrationPoints(List<CalibrationPoint> calibPoints)
+        public Boolean SetCalibrationPoints(List<Calibration> calibPointsCmPerH)
         {
-            if (_magFluxRequestProtocol == null) return false;
+            if (_magFluxRequestProtocol == null || calibPointsCmPerH == null) return false;
+
+            // copy to array for sorting ascending
+            var array = calibPointsCmPerH.ToArray();
+            var ordered = array.OrderBy(x => x.refFlowRate);
+            _calibPointsCmPerH.Clear();
+            foreach (var a in ordered)
+            {
+                _calibPointsCmPerH.Add(a);
+            }
+
+            var calibPoints = new List<CalibrationPoint>();
+            foreach (var cp in _calibPointsCmPerH)
+            {
+                // convert flow rate to liters per second from cubic meters per hour
+                var calibConverter = new CalibrationPoint
+                {
+                    ReferenceFlowRate_lps = cp.refFlowRate / 3.6f,
+                    ReportedFlowRate_lps = cp.dutFlowRate / 3.6f
+                };
+                calibPoints.Add(calibConverter);
+            }
             var cbs = new CalibrationPoints(calibPoints, calibPoints.Count);
             var retVal = _magFluxRequestProtocol.SetCalibrationPoints(cbs);
             _logger.Debug(retVal ? $"{_ident} MagFlux calibration successfully set" : 
diff --git a/Common/Hardware/WaterMeter/WaterMeterCore/WaterMeterRegisters/obj/Debug/WaterMeterRegisters.csproj.CoreCompileInputs.cache b/Common/Hardware/WaterMeter/WaterMeterCore/WaterMeterRegisters/obj/Debug/WaterMeterRegisters.csproj.CoreCompileInputs.cache
index f22623aa..d8b5c8f6 100644
--- a/Common/Hardware/WaterMeter/WaterMeterCore/WaterMeterRegisters/obj/Debug/WaterMeterRegisters.csproj.CoreCompileInputs.cache
+++ b/Common/Hardware/WaterMeter/WaterMeterCore/WaterMeterRegisters/obj/Debug/WaterMeterRegisters.csproj.CoreCompileInputs.cache
@@ -1 +1 @@
-5ed75d99ee45ff67821090f1b3dbb001dd9e4fe3
+1a3d4919c9c702245832d925951f2b7cb72fc333
diff --git a/Common/Tools/Tools.JsonToXlsHelper/obj/Debug/Tools.JsonToXlsHelper.csproj.CoreCompileInputs.cache b/Common/Tools/Tools.JsonToXlsHelper/obj/Debug/Tools.JsonToXlsHelper.csproj.CoreCompileInputs.cache
index 133b97f0..0028f628 100644
--- a/Common/Tools/Tools.JsonToXlsHelper/obj/Debug/Tools.JsonToXlsHelper.csproj.CoreCompileInputs.cache
+++ b/Common/Tools/Tools.JsonToXlsHelper/obj/Debug/Tools.JsonToXlsHelper.csproj.CoreCompileInputs.cache
@@ -1 +1 @@
-0d85a5b3a7561b41163c20e5dc7713bcd0d65555
+f64d563def603c89cafafa61a3219ba97e1e344c
diff --git a/Common/Ui/MagFluxToolBox/FrmTest.cs b/Common/Ui/MagFluxToolBox/FrmTest.cs
index 26401072..dfc03f21 100644
--- a/Common/Ui/MagFluxToolBox/FrmTest.cs
+++ b/Common/Ui/MagFluxToolBox/FrmTest.cs
@@ -8,11 +8,11 @@ using System.Reflection;
 using System.Threading;
 using System.Threading.Tasks;
 using System.Windows.Forms;
+using Xylem.Common.Hardware.WaterMeter.MagFlux.DataPackages.DataTypes;
 using Xylem.Common.Hardware.WaterMeter.MagFlux.DataPackages.EventArguments;
 using Xylem.Common.Hardware.WaterMeter.MagFlux.MagFluxCore;
 using Xylem.Common.Hardware.WaterMeter.WaterMeterCore;
 using Xylem.Common.Utils.ProcessExec.EventArguments;
-using XYLEM.Device;
 
 
 namespace Xylem.Common.Ui.MagFluxToolBox
@@ -24,18 +24,11 @@ namespace Xylem.Common.Ui.MagFluxToolBox
     {
         #region Variables
 
-        struct Calibration
-        {
-            public Single refFlowRate;
-            public Single dutFlowRate;
-        }
-
         const String headerRef = @"Ref FlowRate [m³/h]";
         const String headerDut = @"DUT FlowRate [m³/h]";
 
-
         /// <summary>
-        /// List of calibration points in cubic meters per hour.
+        /// Reference to list of calibration points in cubic meters per hour.
         /// </summary>
         private List<Calibration> _calibPointsCmPerH;
 
@@ -96,7 +89,6 @@ namespace Xylem.Common.Ui.MagFluxToolBox
         {
             ProcessViewControl(false);
             _magFluxMeter?.StopStreamingCatcher();
-            _calibPointsCmPerH = new List<Calibration>();
             lblSensorNo.Text = StrNotConnected;
             lblSensorNo.ForeColor = Color.Red;
             lblWaitingForMeterResponse.Visible = false;
@@ -128,8 +120,6 @@ namespace Xylem.Common.Ui.MagFluxToolBox
 
         private void FrmTest_FormClosing(Object sender, FormClosingEventArgs e)
         {
-            _calibPointsCmPerH.Clear();
-            _calibPointsCmPerH = null;
             if (_magFluxMeter != null)
             {
                 _magFluxMeter.OnStreamingRecordDecoded -= StreamingCatcher_OnStreamingRecordDecoded;
@@ -161,12 +151,11 @@ namespace Xylem.Common.Ui.MagFluxToolBox
             try
             {
                 if (e.ColumnIndex < 0 || e.RowIndex < 0 || _dataTableCalibPoints == null
-                    || _calibPointsCmPerH.Count < e.RowIndex)
+                    || _calibPointsCmPerH == null || _calibPointsCmPerH.Count < e.RowIndex)
                 {
                     return;
                 }
 
-
                 var array = _calibPointsCmPerH.ToArray();
                 var index = e.RowIndex;
                 _calibPointsCmPerH.Clear();
@@ -650,18 +639,8 @@ namespace Xylem.Common.Ui.MagFluxToolBox
         private void btnReadCalibration_Click(Object sender, EventArgs e)
         {
             SetControlsDownloadIsOngoing();
-            var calibPoints = new List<CalibrationPoint>();
-            _magFluxMeter?.ReadCalibration(out calibPoints);
-            if (calibPoints == null) return;
-            var calibConverter = new Calibration();
-            _calibPointsCmPerH?.Clear();
-            foreach (var cp in calibPoints)
-            {
-                // convert flow rate from liters per second to cubic meters per hour
-                calibConverter.refFlowRate = cp.ReferenceFlowRate_lps * 3.6f;
-                calibConverter.dutFlowRate = cp.ReportedFlowRate_lps * 3.6f;
-                _calibPointsCmPerH?.Add(calibConverter);
-            }
+            _magFluxMeter?.ReadCalibration(out _calibPointsCmPerH);
+            if (_calibPointsCmPerH == null) return;
 
             _dataTableCalibPoints?.Clear();
             FillDataGridWithCalibInfos();
@@ -673,19 +652,8 @@ namespace Xylem.Common.Ui.MagFluxToolBox
             SetControlsDownloadIsOngoing();
             if (_calibPointsCmPerH == null)
                 return;
-            var calibPoints = new List<CalibrationPoint>();
-            foreach (var cp in _calibPointsCmPerH)
-            {
-                // convert flow rate to liters per second from cubic meters per hour
-                var calibConverter = new CalibrationPoint
-                {
-                    ReferenceFlowRate_lps = cp.refFlowRate / 3.6f,
-                    ReportedFlowRate_lps = cp.dutFlowRate / 3.6f
-                };
-                calibPoints.Add(calibConverter);
-            }
-
-            _magFluxMeter?.WriteCalibration(calibPoints);
+ 
+            _magFluxMeter?.WriteCalibration(_calibPointsCmPerH);
             SetControlsDownloadIsFinished();
         }