diff --git a/control.json b/control.json
index 826aaf6..319a7c3 100644
--- a/control.json
+++ b/control.json
@@ -16,6 +16,10 @@
             "duration": 10,
             "holding": 5
         },
+	"enter":{
+	    "action": "Off",
+	    "duration": 10
+	},
         "vent": {
             "action": "Off",
             "duration": 30,
diff --git a/framework.yaml b/framework.yaml
index 6777616..6496a94 100644
--- a/framework.yaml
+++ b/framework.yaml
@@ -7,5 +7,5 @@ spec:
     virtualEnv: base # 사용할 가상환경 이름입니다.
     package: requirements.txt # 설치할 Python 패키지 정보 파일입니다.(기본 값은 requirement.txt 입니다.)
 stackbase:
-  tagName: v0.0.15 # Stackbase(gitea)에 릴리즈 태그명 입니다.
+  tagName: v0.0.16 # Stackbase(gitea)에 릴리즈 태그명 입니다.
   repoName: sampyo-dio # Stackbase(gitea)에 저장될 저장소 이릅니다.	
diff --git a/main.py b/main.py
index 4568d49..6ca2bba 100644
--- a/main.py
+++ b/main.py
@@ -43,12 +43,20 @@ def Valve_PureWater(chip, status, action):
     
     chip.set_values(status)
 
-def Measure_Weight(client):
-    # print('In')
+def Valve_EnterWater(chip, status, action):
+    if action == 'On':
+        status[4] = 1
+    else: # action == 'Off'
+        status[4] = 0
+
+    chip.set_values(status)
+
+def measure_weight(client):
+    # print('in')
     val = 0
     try:
         result = client.read_holding_registers(1, 1)
-        if result.isError():
+        if result.iserror():
             print(f'Error: {result}')
         else:
             val = result.registers[0]
@@ -92,8 +100,12 @@ def Command_Read():
         
         # input mixed water
         Valve_MixedWater(chip=output_lines, status=status, action='On')
+        time.sleep(0.5)
+        Valve_EnterWater(chip=output_lines, status=status, action='On')
         time.sleep(mixed_duration)
         Valve_MixedWater(chip=output_lines, status=status, action='Off')
+        time.sleep(0.5)
+        Valve_EnterWater(chip=output_lines, status=status, action='Off')
         time.sleep(measure_duration)
 
         # measure weight
@@ -139,10 +151,14 @@ def Command_Read():
         
         # 3) Input Pure Water
         Valve_PureWater(chip=output_lines, status=status, action='On')
+        time.sleep(0.5)
+        Valve_EnterWater(chip=output_lines, status=status, action='On')
         time.sleep(pure_duration + pure_holding)
         Valve_PureWater(chip=output_lines, status=status, action='Off')
         time.sleep(0.5)
-        
+        Valve_PureWater(chip=output_lines, status=status, action='Off')
+        time.sleep(0.5)
+
         # 4) Wait until empty
         time.sleep(vent_duration)
 
@@ -159,6 +175,8 @@ def Command_Read():
         Valve_Vent(chip=output_lines, status=status, action=cmd['device']['vent']['action'])
         Valve_MixedWater(chip=output_lines, status=status, action=cmd['device']['mixed']['action'])
         Valve_PureWater(chip=output_lines, status=status, action=cmd['device']['pure']['action'])
+        Valve_EnterWater(chip=output_lines, status=status, action=cmd['device']['enter']['action'])
+        
         if cmd['device']['measure']['action'] == 'On':
             result = Measure_Weight(client=client)
             Calculate_Concentration(result)