diff --git a/AsbCloudInfrastructure/Services/DetectOperations/Detectors/DetectorAbstract.cs b/AsbCloudInfrastructure/Services/DetectOperations/Detectors/DetectorAbstract.cs
index 1a9f1e17..34f52cea 100644
--- a/AsbCloudInfrastructure/Services/DetectOperations/Detectors/DetectorAbstract.cs
+++ b/AsbCloudInfrastructure/Services/DetectOperations/Detectors/DetectorAbstract.cs
@@ -93,11 +93,11 @@ namespace AsbCloudInfrastructure.Services.DetectOperations.Detectors
         /// <param name="begin"></param>
         /// <param name="end"></param>
         /// <returns></returns>
-        protected static double CalcDeltaTime(DetectableTelemetry[] telemetry, int begin, int end)
+        protected static double CalcDeltaMinutes(DetectableTelemetry[] telemetry, int begin, int end)
         {
             var pBegin = telemetry[begin];
             var pEnd = telemetry[end];
-            var result = (pEnd.DateTime - pBegin.DateTime).TotalHours;
+            var result = (pEnd.DateTime - pBegin.DateTime).TotalMinutes;
             return result;
         }
 
diff --git a/AsbCloudInfrastructure/Services/DetectOperations/Detectors/DetectorDevelopment.cs b/AsbCloudInfrastructure/Services/DetectOperations/Detectors/DetectorDevelopment.cs
index 542a79f5..51779e3e 100644
--- a/AsbCloudInfrastructure/Services/DetectOperations/Detectors/DetectorDevelopment.cs
+++ b/AsbCloudInfrastructure/Services/DetectOperations/Detectors/DetectorDevelopment.cs
@@ -9,7 +9,7 @@ namespace AsbCloudInfrastructure.Services.DetectOperations.Detectors
             : base(18) { }
 
         protected override double CalcValue(DetectableTelemetry[] telemetry, int begin, int end)
-            => CalcDeltaTime(telemetry, begin, end);
+            => CalcDeltaMinutes(telemetry, begin, end);
 
         protected override bool DetectBegin(DetectableTelemetry[] telemetry, int position, DetectedOperation? previousOperation)
         {
diff --git a/AsbCloudInfrastructure/Services/DetectOperations/Detectors/DetectorSlipsTime.cs b/AsbCloudInfrastructure/Services/DetectOperations/Detectors/DetectorSlipsTime.cs
index 90572270..ad684a66 100644
--- a/AsbCloudInfrastructure/Services/DetectOperations/Detectors/DetectorSlipsTime.cs
+++ b/AsbCloudInfrastructure/Services/DetectOperations/Detectors/DetectorSlipsTime.cs
@@ -9,7 +9,7 @@ namespace AsbCloudInfrastructure.Services.DetectOperations.Detectors
             : base(14) { }
 
         protected override double CalcValue(DetectableTelemetry[] telemetry, int begin, int end)
-            => CalcDeltaTime(telemetry, begin, end);
+            => CalcDeltaMinutes(telemetry, begin, end);
 
         protected override bool DetectBegin(DetectableTelemetry[] telemetry, int position, DetectedOperation? previousOperation)
         {
diff --git a/AsbCloudInfrastructure/Services/DetectOperations/Detectors/DetectorTemplating.cs b/AsbCloudInfrastructure/Services/DetectOperations/Detectors/DetectorTemplating.cs
index c1aae8c2..e1fd68bc 100644
--- a/AsbCloudInfrastructure/Services/DetectOperations/Detectors/DetectorTemplating.cs
+++ b/AsbCloudInfrastructure/Services/DetectOperations/Detectors/DetectorTemplating.cs
@@ -10,7 +10,7 @@ namespace AsbCloudInfrastructure.Services.DetectOperations.Detectors
             : base(19) { }
 
         protected override double CalcValue(DetectableTelemetry[] telemetry, int begin, int end)
-            => CalcDeltaTime(telemetry, begin, end);
+            => CalcDeltaMinutes(telemetry, begin, end);
 
         protected override bool DetectBegin(DetectableTelemetry[] telemetry, int position, DetectedOperation? previousOperation)
         {