ViewModels/D7896ViewModel.cs

@@ -784,7 +784,18 @@ public partial class D7896ViewModel : ObservableObject
         CurrentMeasurementIndex = 0;
         StatusMessage = "已重置";
         TestDateTime = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
-        TemperatureCurveModel = null;
+
+        // 清空曲线：新建一个空白的 PlotModel 替换原来的
+        TemperatureCurveModel = new PlotModel
+        {
+            Title = "温升与冷却曲线",
+            Background = OxyColors.White
+        };
+        TemperatureCurveModel.Axes.Add(new LinearAxis { Position = AxisPosition.Bottom, Title = "时间 (s)" });
+        TemperatureCurveModel.Axes.Add(new LinearAxis { Position = AxisPosition.Left, Title = "温升 (℃)" });
+        TemperatureCurveModel.InvalidatePlot(true);
+
+        CurveTitle = "温升曲线";
     }
 
     [RelayCommand]

Window1.xaml

@@ -38,7 +38,7 @@
                     <RadioButton x:Name="rb50Hz" Content="50 Hz" GroupName="Freq" IsChecked="True" Margin="5,0,15,0"/>
                     <RadioButton x:Name="rb60Hz" Content="60 Hz" GroupName="Freq"/>
                     <Label Content="设定电流 (A):" Margin="20,0,0,0"/>
-                    <TextBox x:Name="txtSetCurrent" Text="0.650" Width="80" TextAlignment="Center"/>
+                    <TextBox x:Name="txtSetCurrent" Text="0.680" Width="80" TextAlignment="Center"/>
                     <Label Content="A"/>
                     <Button x:Name="btnSet" Content="直接设定" Click="BtnSet_Click" Width="80" Margin="10,0,0,0"/>
                     <Button x:Name="btnStop" Content="禁止输出" Click="BtnStop_Click" Width="80" Margin="5,0,0,0"/>