diff --git a/TestBenchFramework/BenchControl/Keithley/Multimeter_2010_RS232/Multimeter.cs b/TestBenchFramework/BenchControl/Keithley/Multimeter_2010_RS232/Multimeter.cs
index 974ea9e59..7cf80a64d 100644
--- a/TestBenchFramework/BenchControl/Keithley/Multimeter_2010_RS232/Multimeter.cs
+++ b/TestBenchFramework/BenchControl/Keithley/Multimeter_2010_RS232/Multimeter.cs
@@ -200,6 +200,8 @@ namespace TBF.BenchControl.Keithley.Multimeter_2010_RS232
         /// <summary>Run this device</summary>
         public void RunDeviceBefore()
         {
+			if (multimeterCfg.DebugLevel == DebugMode.Simulate) return;
+
 			receivedData.Append(serialPort.ReadExisting());
 
 			if (scanState == ScanState.Read_Receive)
@@ -242,6 +244,8 @@ namespace TBF.BenchControl.Keithley.Multimeter_2010_RS232
         /// <summary>Run this device</summary>
         public void RunDeviceAfter()
         {
+			if (multimeterCfg.DebugLevel == DebugMode.Simulate) return;
+
 			switch (scanState)
 			{
 				case ScanState.Start_Reset:
@@ -291,6 +295,8 @@ namespace TBF.BenchControl.Keithley.Multimeter_2010_RS232
         /// <summary>Stop this device</summary>
         public void StopDevice()
         {
+			if (multimeterCfg.DebugLevel == DebugMode.Simulate) return;
+
 			serialPort.Close();
 		}
 	}