diff --git a/Results/Entities/Batch.cs b/Results/Entities/Batch.cs
index ab0599931..1f5651e5e 100644
--- a/Results/Entities/Batch.cs
+++ b/Results/Entities/Batch.cs
@@ -207,7 +207,7 @@ namespace Results.Entities
 
             foreach (var tr in TestRslts)
             {
-                if (tr.TestDone)
+                if (tr.TestDone && tr.AmbTempMean != 0)
                 {
                     double duration = (tr.EndTime - tr.StartTime).TotalSeconds;
                     timeSum += duration;
@@ -225,7 +225,7 @@ namespace Results.Entities
 
             foreach (var tr in TestRslts)
             {
-                if (tr.TestDone)
+                if (tr.TestDone && tr.AmbPressMean != 0)
                 {
                     double duration = (tr.EndTime - tr.StartTime).TotalSeconds;
                     timeSum += duration;
@@ -243,7 +243,7 @@ namespace Results.Entities
             
             foreach (var tr in TestRslts)
             {
-                if (tr.TestDone)
+                if (tr.TestDone && tr.AmbHumiMean != 0)
                 {
                     double duration = (tr.EndTime - tr.StartTime).TotalSeconds;
                     timeSum += duration;
@@ -258,7 +258,7 @@ namespace Results.Entities
         {
             for (int i = 0; i < TestRslts.Count; i++)
             {
-                if (TestRslts[i].Publish() == Publish.Always)
+                if (TestRslts[i].Publish() == Common.Publish.Always && TestRslts[i].AmbTempStart != 0)
                     return TestRslts[i].AmbTempStart;
             }
             return 0;
@@ -267,7 +267,7 @@ namespace Results.Entities
         {
             for (int i = 0; i < TestRslts.Count; i++)
             {
-                if (TestRslts[i].Publish() == Publish.Always)
+                if (TestRslts[i].Publish() == Common.Publish.Always && TestRslts[i].AmbPressStart != 0)
                     return TestRslts[i].AmbPressStart;
             }
             return 0;
@@ -276,7 +276,7 @@ namespace Results.Entities
         {
             for (int i = 0; i < TestRslts.Count; i++)
             {
-                if (TestRslts[i].Publish() == Publish.Always)
+                if (TestRslts[i].Publish() == Common.Publish.Always && TestRslts[i].AmbHumiStart != 0)
                     return TestRslts[i].AmbHumiStart;
             }
             return 0;
@@ -284,27 +284,27 @@ namespace Results.Entities
 
         public virtual double AmbTempEnd()
         {
-            for (int i = TestRslts.Count - 1; i >= 0; i++)
+            for (int i = TestRslts.Count - 1; i >= 0; i--)
             {
-                if (TestRslts[i].Publish() == Publish.Always)
+                if (TestRslts[i].Publish() == Common.Publish.Always && TestRslts[i].AmbTempEnd != 0)
                     return TestRslts[i].AmbTempEnd;
             }
             return 0;
         }
         public virtual double AmbPressEnd()
         {
-            for (int i = TestRslts.Count - 1; i >= 0; i++)
+            for (int i = TestRslts.Count - 1; i >= 0; i--)
             {
-                if (TestRslts[i].Publish() == Publish.Always)
+                if (TestRslts[i].Publish() == Common.Publish.Always && TestRslts[i].AmbPressEnd != 0)
                     return TestRslts[i].AmbPressEnd;
             }
             return 0;
         }
         public virtual double AmbHumiEnd()
         {
-            for (int i = TestRslts.Count - 1; i >= 0; i++)
+            for (int i = TestRslts.Count - 1; i >= 0; i--)
             {
-                if (TestRslts[i].Publish() == Publish.Always)
+                if (TestRslts[i].Publish() == Common.Publish.Always && TestRslts[i].AmbHumiEnd != 0)
                     return TestRslts[i].AmbHumiEnd;
             }
             return 0;