diff --git a/Results/Properties/AssemblyInfo.cs b/Results/Properties/AssemblyInfo.cs
index 0a1f33ff0..dfa62ffb0 100644
--- a/Results/Properties/AssemblyInfo.cs
+++ b/Results/Properties/AssemblyInfo.cs
@@ -32,5 +32,5 @@ using System.Runtime.InteropServices;
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("2.18.870.0")]
-[assembly: AssemblyFileVersion("2.18.870.0")]
+[assembly: AssemblyVersion("2.18.874.0")]
+[assembly: AssemblyFileVersion("2.18.874.0")]
diff --git a/TBF/BenchControl/TestMethods/iPerlCommunication/iPerlCommunicationForm.cs b/TBF/BenchControl/TestMethods/iPerlCommunication/iPerlCommunicationForm.cs
index a2bd78bbf..13c948b88 100644
--- a/TBF/BenchControl/TestMethods/iPerlCommunication/iPerlCommunicationForm.cs
+++ b/TBF/BenchControl/TestMethods/iPerlCommunication/iPerlCommunicationForm.cs
@@ -1197,7 +1197,7 @@ namespace TBF.BenchControl.TestMethods.iPerlCommunication
         {
             if (ihead.CommFailed) return CommErr.CommFailed;
 
-            if (ihead.CalibFactor <= 5000)
+            if (ihead.FactorLimitLo <= ihead.CalibFactor && ihead.CalibFactor <= ihead.FactorLimitHi)
             {
                 resultStr = "Calibratin factor is OK";
                 return CommErr.None;  /// No need to update the calibration factor
@@ -1208,14 +1208,14 @@ namespace TBF.BenchControl.TestMethods.iPerlCommunication
             CommErr error = CommErr.Write;
 
             /// Determine the new calibration factor
-            UInt16 newCalibFactor = 0;
+            UInt16 newCalibFactor;
             switch (ihead.CalibrationStruct.MeterType)
             {
-                case MeterType.DN15:    newCalibFactor = 2650; break;
+                case MeterType.DN15:    newCalibFactor = 2710; break;
                 case MeterType.DN20:    newCalibFactor = 3746; break;
                 case MeterType.DN25:    newCalibFactor = 3300; break;
                 case MeterType.DN32:    newCalibFactor = 2500; break;
-                case MeterType.DN40:    newCalibFactor = 3000; break;
+                case MeterType.DN40:    newCalibFactor = 3080; break;
 
                 case MeterType.DN26:
                 case MeterType.CoaxManifold:
diff --git a/TBF/Properties/AssemblyInfo.cs b/TBF/Properties/AssemblyInfo.cs
index 32de9f5ba..0d185e5bd 100644
--- a/TBF/Properties/AssemblyInfo.cs
+++ b/TBF/Properties/AssemblyInfo.cs
@@ -29,5 +29,5 @@ using System.Runtime.InteropServices;
 //      Build Number
 //      Revision
 //
-[assembly: AssemblyVersion("2.18.872.0")]
-[assembly: AssemblyFileVersion("2.18.872.0")]
+[assembly: AssemblyVersion("2.18.875.0")]
+[assembly: AssemblyFileVersion("2.18.875.0")]