diff --git a/MainWindow.xaml b/MainWindow.xaml
index 310366d..c39ff58 100644
--- a/MainWindow.xaml
+++ b/MainWindow.xaml
@@ -61,7 +61,6 @@
                         <ColumnDefinition Width="*"/>
                         <ColumnDefinition Width="Auto"/>
                         <ColumnDefinition Width="Auto"/>
-                        <ColumnDefinition Width="Auto"/>
                     </Grid.ColumnDefinitions>
 
                     <!-- 主标题 -->
@@ -71,10 +70,13 @@
                         <!--<TextBlock Text="定量供应检验系统" 
                                    FontSize="14" Foreground="#CCFFFFFF" Margin="0,5,0,0"/>-->
                     </StackPanel>
-                    <StackPanel Grid.Column="3" Orientation="Horizontal" Margin="2" HorizontalAlignment="Center">
+                    <StackPanel Grid.Column="2" Orientation="Horizontal" Margin="2" HorizontalAlignment="Center" VerticalAlignment="Center">
                         <TextBlock Text="样品编号：" FontSize="26" FontWeight="Bold" Foreground="White" Style="{StaticResource LabelStyle}"/>
                         <TextBox x:Name="pressureDiff2" Text="" Width="180" Style="{StaticResource TextBoxStyle}" LostFocus="pressureDiff2_GotFocus"/>
-
+                        <Border Background="White" Padding="15,8" Margin="15,0,0,0" VerticalAlignment="Center">
+                            <TextBlock Text="{Binding CurrentTime, StringFormat='yyyy-MM-dd HH:mm:ss'}" 
+                                       FontSize="12" FontWeight="Bold" Foreground="#2C3E50"/>
+                        </Border>
                     </StackPanel>
 
                     <!-- 状态指示 -->
@@ -87,11 +89,6 @@
                         </Border>
                     </StackPanel>
 
-                    <!-- 系统时间 -->
-                    <Border Grid.Column="2" Background="White" Padding="15,8">
-                        <TextBlock Text="{Binding CurrentTime, StringFormat='yyyy-MM-dd HH:mm:ss'}" 
-                                   FontSize="12" FontWeight="Bold" Foreground="#2C3E50"/>
-                    </Border>
                 </Grid>
             </Border>
 
diff --git a/ParameterSettingsWindow.xaml b/ParameterSettingsWindow.xaml
index e398065..3b62316 100644
--- a/ParameterSettingsWindow.xaml
+++ b/ParameterSettingsWindow.xaml
@@ -1,7 +1,7 @@
 <Window x:Class="自救器呼吸器综合检验仪.ParameterSettingsWindow"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-        Title="参数设置" Height="600" Width="1024" WindowState="Maximized"
+        Title="参数设置" Height="600" Width="800"
         WindowStartupLocation="CenterScreen"
         ResizeMode="NoResize" Loaded="Window_Loaded" Closed="Window_Closed" Closing="Window_Closing">
 
diff --git a/ParameterSettingsWindow.xaml.cs b/ParameterSettingsWindow.xaml.cs
index 56be9ce..3411548 100644
--- a/ParameterSettingsWindow.xaml.cs
+++ b/ParameterSettingsWindow.xaml.cs
@@ -29,6 +29,17 @@ namespace 自救器呼吸器综合检验仪
             _readTimer = InitDispatcherTimer();
         }
 
+        private void EnsureWindowedLayout()
+        {
+            WindowState = WindowState.Normal;
+            Width = 1024;
+            Height = 600;
+
+            Rect workArea = SystemParameters.WorkArea;
+            Left = workArea.Left + (workArea.Width - Width) / 2;
+            Top = workArea.Top + (workArea.Height - Height) / 2;
+        }
+
         private DispatcherTimer InitDispatcherTimer()
         {
             var timer = new DispatcherTimer
@@ -446,6 +457,8 @@ _modbusMaster?.ReadHoldingRegisters(1, 290, 2)
 
         private void Window_Loaded(object sender, RoutedEventArgs e)
         {
+            EnsureWindowedLayout();
+
             string plcIp = "192.168.1.10";
             bool initSuccess = Data.ModbusResourceManager.Instance.Init(plcIp, 502);
             if (!initSuccess)
diff --git a/ReportWindow.xaml.cs b/ReportWindow.xaml.cs
index 9b864e5..4147252 100644
--- a/ReportWindow.xaml.cs
+++ b/ReportWindow.xaml.cs
@@ -228,6 +228,13 @@ namespace 自救器呼吸器综合检验仪
 
         private void BtnPrint_Click(object sender, RoutedEventArgs e)
         {
+            if (_records == null || _records.Count == 0)
+            {
+                MessageBox.Show("无数据，不可打印", "提示",
+                    MessageBoxButton.OK, MessageBoxImage.Information);
+                return;
+            }
+
             ma.BtnClickFunctionForNew(Function.ButtonType.切换型, 15);
         }
 
diff --git a/ReportWindow2.xaml.cs b/ReportWindow2.xaml.cs
index 23cfed2..3ed6278 100644
--- a/ReportWindow2.xaml.cs
+++ b/ReportWindow2.xaml.cs
@@ -248,6 +248,13 @@ namespace 自救器呼吸器综合检验仪
 
         private void BtnPrint_Click(object sender, RoutedEventArgs e)
         {
+            if (_records == null || _records.Count == 0)
+            {
+                MessageBox.Show("无数据，不可打印", "提示",
+                    MessageBoxButton.OK, MessageBoxImage.Information);
+                return;
+            }
+
             ma.BtnClickFunctionForNew(Function.ButtonType.切换型, 15);
         }
 
diff --git a/ReportWindow3.xaml.cs b/ReportWindow3.xaml.cs
index 6eeda3f..0027496 100644
--- a/ReportWindow3.xaml.cs
+++ b/ReportWindow3.xaml.cs
@@ -191,6 +191,13 @@ namespace 自救器呼吸器综合检验仪
 
         private void BtnPrint_Click(object sender, RoutedEventArgs e)
         {
+            if (_records == null || _records.Count == 0)
+            {
+                MessageBox.Show("无数据，不可打印", "提示",
+                    MessageBoxButton.OK, MessageBoxImage.Information);
+                return;
+            }
+
             ma.BtnClickFunctionForNew(Function.ButtonType.切换型, 15);
         }
 
diff --git a/ReportWindow4.xaml.cs b/ReportWindow4.xaml.cs
index 8507c48..5366b6c 100644
--- a/ReportWindow4.xaml.cs
+++ b/ReportWindow4.xaml.cs
@@ -233,6 +233,13 @@ namespace 自救器呼吸器综合检验仪
 
         private void BtnPrint_Click(object sender, RoutedEventArgs e)
         {
+            if (_records == null || _records.Count == 0)
+            {
+                MessageBox.Show("无数据，不可打印", "提示",
+                    MessageBoxButton.OK, MessageBoxImage.Information);
+                return;
+            }
+
             ma.BtnClickFunctionForNew(Function.ButtonType.切换型, 15);
         }