diff --git a/app.db b/app.db
index a000dab..57905b2 100644
Binary files a/app.db and b/app.db differ
diff --git a/src/main/java/com/iflytop/digester/DigestionTaskThread.java b/src/main/java/com/iflytop/digester/DigestionTaskThread.java
index fb31728..007773a 100644
--- a/src/main/java/com/iflytop/digester/DigestionTaskThread.java
+++ b/src/main/java/com/iflytop/digester/DigestionTaskThread.java
@@ -8,9 +8,7 @@ import com.iflytop.digester.underframework.dao.model.UfMdbOption;
 import com.iflytop.digester.underframework.dao.record.UfActiveRecord;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-
 import java.util.*;
-
 public class DigestionTaskThread extends Thread {
     // 任务完成回调
     public interface FinishCallback {
@@ -148,6 +146,7 @@ public class DigestionTaskThread extends Thread {
         this.taskModel.save();
 
         if ( "auto".equals(this.taskModel.mode) ) {
+            this.lockLiquidPlate();
             // 打开门
             device.door.open();
             // 等待放入试管架
@@ -175,6 +174,7 @@ public class DigestionTaskThread extends Thread {
 
         // 搬运到加热转盘
         device.transferArm.moveTubeRackToHeatingTurntable(this.heatingSlot.index);
+        this.unlockLiquidPlate();
 
         // 加热
         for ( var heating : digestionRound.heatings ) {
@@ -184,6 +184,7 @@ public class DigestionTaskThread extends Thread {
         }
 
         // 移至加液区， 以便执行下一轮
+        this.lockLiquidPlate();
         device.transferArm.moveTubeRackToLiquidPlate(this.heatingSlot.index);
         this.updateTaskStatus("RoundFinish", "配置轮次执行结束");
     }
@@ -204,6 +205,9 @@ public class DigestionTaskThread extends Thread {
         }
         this.updateTaskStatus("Liquid", "摇匀");
         liquidAddition.shake(digestionRound.shakingCount);
+        // 搬运到加热转盘
+        device.transferArm.moveTubeRackToHeatingTurntable(this.heatingSlot.index);
+        this.unlockLiquidPlate();
 
         // 预检查定时， 在结束前10分钟执行
         Integer totalDurationCount = 0;
@@ -245,6 +249,10 @@ public class DigestionTaskThread extends Thread {
             this.updateTaskStatus("PreCheckWait", "预检完成");
         }
 
+        // 移动到加液盘准备取出
+        this.lockLiquidPlate();
+        device.transferArm.moveTubeRackToLiquidPlate(this.heatingSlot.index); // 移动到加液盘
+
         // 加水定容
         if ( 0 < digestionRound.waterVolume ) {
             this.updateTaskStatus("Water", String.format("加水定容 : %d", digestionRound.waterVolume));
@@ -253,12 +261,12 @@ public class DigestionTaskThread extends Thread {
 
         // 正常消解结束；
         this.updateTaskStatus("LastRound", "取出试管架");
-        device.transferArm.moveTubeRackToLiquidPlate(this.heatingSlot.index); // 移动到加液盘
         device.door.open(); // 打开门
         this.waitForTubeRackTakeOut(); // 等待取出
         device.door.close(); // 关闭门
         this.heatingSlot.setTubeRackNo(null); // 释放加热位
         this.updateTaskStatus("LastRound", "执行最后一轮配置结束");
+        this.unlockLiquidPlate();
     }
 
     // 执行消解最后一轮预检查
@@ -268,6 +276,8 @@ public class DigestionTaskThread extends Thread {
 
             // 检查试管
             var device = Device.getInstance();
+            this.lockLiquidPlate();
+
             // 移动到加液盘
             device.transferArm.moveTubeRackToLiquidPlate(this.heatingSlot.index);
             // 拍照检查异常试管
@@ -302,6 +312,7 @@ public class DigestionTaskThread extends Thread {
 
             // 将正常试管放入加热转盘
             device.transferArm.moveTubeRackToHeatingTurntable(this.heatingSlot.index);
+            this.unlockLiquidPlate();
 
             // 启动异常处理线程
             DigestionTaskThread.this.errorProcessThread = new Thread(DigestionTaskThread.this::executeErrorProcess);
@@ -361,6 +372,7 @@ public class DigestionTaskThread extends Thread {
             this.updateTaskStatus("TubeCheck", String.format("取出剩余异常试管 : [%s]", errorTubeIndexes));
             // 如果还存在异常， 则直接取出
             var device = Device.getInstance();
+            this.lockLiquidPlate();
             // 等待放入空试管架
             device.door.open();
             this.waitForEmptyTubeRackPutIn();
@@ -377,6 +389,7 @@ public class DigestionTaskThread extends Thread {
             device.door.open();
             this.waitForTubeRackTakeOut();
             device.door.close();
+            this.unlockLiquidPlate();
         } catch (InterruptedException e) {
             UfMdbNotification.error("消解异常处理失败 : " + e.getMessage());
             this.updateTaskStatus("Error", String.format("消解异常处理失败 : %s", e.getMessage()));
@@ -399,6 +412,7 @@ public class DigestionTaskThread extends Thread {
         }
 
         this.updateTaskStatus("ErrorRound", "移动异常试管架至加液区");
+        this.lockLiquidPlate();
         device.transferArm.moveTubeRackToLiquidPlate(errorSlot.index);
 
         var liquidAddition = device.liquidAddition;
@@ -412,6 +426,7 @@ public class DigestionTaskThread extends Thread {
 
         this.updateTaskStatus("ErrorRound", "移动异常试管架至加热区");
         device.transferArm.moveTubeRackToHeatingTurntable(errorSlot.index);
+        this.unlockLiquidPlate();
 
         for ( var heating : errorRound.heatings ) {
             this.updateTaskStatus("ErrorRoundHeating", String.format("异常加热 %d℃ %d分钟", heating.temperature, heating.duration));
@@ -420,19 +435,21 @@ public class DigestionTaskThread extends Thread {
         }
 
         this.updateTaskStatus("ErrorRound", "移动异常试管架至加液区");
+        this.lockLiquidPlate();
         device.transferArm.moveTubeRackToLiquidPlate(errorSlot.index);
 
         // 拍照检查是否存在消解完成的试管
         this.executeErrorRoundTakeShotAndCheckFinishedTubes();
 
+        this.updateTaskStatus("ErrorRound", "移动异常试管架至加热区");
+        device.transferArm.moveTubeRackToHeatingTurntable(errorSlot.index);
+
         // 如果不存在消解完成的试管则本轮次结束
         if (this.finishedErrorTubeIndexes.isEmpty()) {
+            this.unlockLiquidPlate();
             return ;
         }
 
-        this.updateTaskStatus("ErrorRound", "移动异常试管架至加热区");
-        device.transferArm.moveTubeRackToHeatingTurntable(errorSlot.index);
-
         // 等待放入空试管架
         device.door.open();
         this.waitForEmptyTubeRackPutIn();
@@ -446,6 +463,7 @@ public class DigestionTaskThread extends Thread {
         device.door.open();
         this.waitForTubeRackTakeOut();
         device.door.close();
+        this.unlockLiquidPlate();
 
         // 更新异常试管索引列表
         this.errorTubeIndexes.removeAll(this.finishedErrorTubeIndexes);
@@ -539,6 +557,31 @@ public class DigestionTaskThread extends Thread {
         this.updateTaskStatus("TubeRackTakeOutWaitDone", "试管架已取出");
     }
 
+    // 使用加液盘
+    private void lockLiquidPlate() {
+        var lockName = this.taskModel.id;
+        if ( "manual".equals(this.taskModel.mode) ) {
+            lockName = this.taskModel.batchNo;
+        }
+
+        var device = Device.getInstance();
+        this.updateTaskStatus("WaitForLiquidPlate", "等待加液盘空闲");
+        device.liquidAddition.lockLiquidPlate(lockName);
+        this.updateTaskStatus("WaitForLiquidPlate", "锁定加液盘");
+    }
+
+    // 释放加液盘
+    private void unlockLiquidPlate() {
+        var lockName = this.taskModel.id;
+        if ( "manual".equals(this.taskModel.mode) ) {
+            lockName = this.taskModel.batchNo;
+        }
+
+        var device = Device.getInstance();
+        this.updateTaskStatus("WaitForLiquidPlate", "释放加液盘");
+        device.liquidAddition.unlockLiquidPlate(lockName);
+    }
+
     // 更新任务状态
     private void updateTaskStatus(String status, String message) {
         LOG.info("[Digestion Task : {}] ({}) {}", taskModel.id, status, message);
diff --git a/src/main/java/com/iflytop/digester/controller/HeatSlotController.java b/src/main/java/com/iflytop/digester/controller/HeatSlotController.java
index 18436e5..26960a4 100644
--- a/src/main/java/com/iflytop/digester/controller/HeatSlotController.java
+++ b/src/main/java/com/iflytop/digester/controller/HeatSlotController.java
@@ -8,6 +8,8 @@ import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.ResponseBody;
 import java.util.Map;
+import java.util.UUID;
+
 @Controller
 public class HeatSlotController extends UfApiControllerBase {
     @Resource
@@ -26,6 +28,7 @@ public class HeatSlotController extends UfApiControllerBase {
         String tubeRackNo = (String)params.get("tubeRackNo");
         try {
             var slot = this.device.heatingTurntable.allocSlot(tubeRackNo);
+            this.device.liquidAddition.lockLiquidPlate(tubeRackNo);
             return this.success(slot);
         } catch ( Exception e ) {
             return this.error(e.getMessage());
@@ -38,6 +41,7 @@ public class HeatSlotController extends UfApiControllerBase {
         Integer slotIndex = (Integer)params.get("slotIndex");
         try {
             var slot = this.device.heatingTurntable.getSlotByIndex(slotIndex);
+            this.device.liquidAddition.unlockLiquidPlate(slot.tubeRackNo);
             slot.setTubeRackNo(null);
             return this.success();
         } catch ( Exception e ) {
diff --git a/src/main/java/com/iflytop/digester/deviceinstance/HeatingTurntableSlot.java b/src/main/java/com/iflytop/digester/deviceinstance/HeatingTurntableSlot.java
index 5c261b0..0455846 100644
--- a/src/main/java/com/iflytop/digester/deviceinstance/HeatingTurntableSlot.java
+++ b/src/main/java/com/iflytop/digester/deviceinstance/HeatingTurntableSlot.java
@@ -1,11 +1,9 @@
 package com.iflytop.digester.deviceinstance;
 import com.iflytop.digester.underframework.UfActuatorCmdExecutor;
 import com.iflytop.digester.underframework.UfCmdSnippetExecutor;
-
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
-
 public class HeatingTurntableSlot {
     // 槽位索引
     public Integer index = -1;
diff --git a/src/main/java/com/iflytop/digester/deviceinstance/LiquidAdditionInstance.java b/src/main/java/com/iflytop/digester/deviceinstance/LiquidAdditionInstance.java
index 37d5e01..8e6167b 100644
--- a/src/main/java/com/iflytop/digester/deviceinstance/LiquidAdditionInstance.java
+++ b/src/main/java/com/iflytop/digester/deviceinstance/LiquidAdditionInstance.java
@@ -17,9 +17,12 @@ public class LiquidAdditionInstance {
     private List<LiquidAdditionLiquid> liquids;
     // lock for bucket empty
     private final Object bucketEmptyLock = new Object();
+    // locks for liquid plate
+    private final List<String> liquidPlateLocks = new ArrayList<>();
 
     // setup
     public void setup() {
+        this.liquidPlateLocks.clear();
         this.liquids = new ArrayList<>();
         for (int i = 0; i < 8; i++) {
             LiquidAdditionLiquid liquid = new LiquidAdditionLiquid();
@@ -31,6 +34,43 @@ public class LiquidAdditionInstance {
         }
     }
 
+    // lock liquid plate
+    public void lockLiquidPlate( String lockName ) {
+        MdbRuntimeLog.log("LiquidPlateLock", "加液盘锁定等待 : %s", lockName);
+        this.liquidPlateLocks.add(lockName);
+        if ( 1 == this.liquidPlateLocks.size() ) {
+            MdbRuntimeLog.log("LiquidPlateLock", "加液盘锁定成功 : %s", lockName);
+            return ;
+        }
+        synchronized ( lockName ) {
+            try {
+                lockName.wait();
+                MdbRuntimeLog.log("LiquidPlateLock", "加液盘锁定成功 : %s", lockName);
+            } catch (InterruptedException e) {
+                throw new RuntimeException(e);
+            }
+        }
+    }
+
+    // unlock liquid plate
+    public void unlockLiquidPlate( String lockName ) {
+        MdbRuntimeLog.log("LiquidPlateLock", "加液盘锁定解除 : %s", lockName);
+        String lock = null;
+        for ( String lockItem : this.liquidPlateLocks ) {
+            if ( lockItem.equals(lockName) ) {
+                lock = lockItem;
+            }
+        }
+        this.liquidPlateLocks.remove(lock);
+        if (this.liquidPlateLocks.isEmpty()) {
+            return ;
+        }
+        Object nextLock = this.liquidPlateLocks.remove(0);
+        synchronized ( nextLock ) {
+            nextLock.notify();
+        }
+    }
+
     // get liquids
     public List<LiquidAdditionLiquid> getLiquids() {
         return this.liquids;
@@ -95,6 +135,13 @@ public class LiquidAdditionInstance {
 
     // 检查液体量
     private void bucketVolumeCheck( Integer pumpIndex ) {
+        var env = UfApplication.getApp().getEnv();
+        Boolean bucketVolumeCheckEnable = env.getProperty("app.bucketVolumeCheckEnable", Boolean.class);
+        assert null != bucketVolumeCheckEnable;
+        if ( !bucketVolumeCheckEnable ) {
+            return ;
+        }
+
         var liquid = liquids.get((0==pumpIndex%2) ? pumpIndex/2 : (pumpIndex-1)/2);
         var stateStr = UfActuatorCmdExecutor.execute("LiquidBucketVolumeIO", "module_readio");
         var state = Integer.parseInt(stateStr);
@@ -108,7 +155,6 @@ public class LiquidAdditionInstance {
         liquid.setVolume(0);
 
         // 如果缺少的液体不是水， 则需要发送通知手动补充
-        var env = UfApplication.getApp().getEnv();
         Integer waterBucketIndex = env.getProperty("app.liquidWaterBucketIndex", Integer.class);
         assert waterBucketIndex != null;
         if (!waterBucketIndex.equals(liquid.bucketIndex)) {
diff --git a/src/main/java/com/iflytop/digester/underframework/dao/record/UfActiveRecord.java b/src/main/java/com/iflytop/digester/underframework/dao/record/UfActiveRecord.java
index ae51de4..9bd410e 100644
--- a/src/main/java/com/iflytop/digester/underframework/dao/record/UfActiveRecord.java
+++ b/src/main/java/com/iflytop/digester/underframework/dao/record/UfActiveRecord.java
@@ -28,7 +28,9 @@ public class UfActiveRecord {
         String tableName = UfActiveRecord.getTableNameFromModelClass(this.getClass());
         Map<String,Object> data = UfActiveRecord.exportModelData(this);
         if ( this.isNewRecord ) {
-            this.id = UUID.randomUUID().toString();
+            if ( null == this.id ) {
+                this.id = UUID.randomUUID().toString();
+            }
             data.put("id", this.id);
             mapper.insert(tableName, data);
             this.isNewRecord = false;