diff --git a/csst_common/data_manager.py b/csst_common/data_manager.py
index bfad8795682f35cc817561833a78f3ae94e992f0..139d83754a91d19be79e4dcec23852cba774f6e3 100644
--- a/csst_common/data_manager.py
+++ b/csst_common/data_manager.py
@@ -574,7 +574,7 @@ class CsstMsDataManager:
     def dfs_l0_query(self, obs_id: str = "100000100"):
         """ Query L0 data from DFS. """
         result = self.dfs_L0DataApi.find(obs_id=str(obs_id))
-        print(f"{result['totalCount']} entries returned from DFS.")
+        print(f"{result['totalCount']} records returned from DFS.")
         if not result["code"] == 0:
             raise ValueError(f"DFS returns non-zero code! ({result['code']})")
         tbl = Table([_.__dict__ for _ in result["data"]])
@@ -586,6 +586,18 @@ class CsstMsDataManager:
                     self.logger_ppl.warning(f"Record not found for detector {detector:02d} and obs_type {obs_type}")
         return tbl
 
+    def dfs_l0_check_all(self):
+        """ Check all C5.2 L0 data is available in DFS. """
+        is_good = True
+        for obs_id in range(100000020, 100000155):
+            tbl = self.dfs_l0_query(obs_id=f"{obs_id}")
+            if len(tbl) == 60:
+                self.logger_ppl.info(f"DFS returns {len(tbl)} records for obs_id={obs_id}")
+            else:
+                is_good = False
+                self.logger_ppl.warning(f"DFS returns {len(tbl)} records for obs_id={obs_id}")
+        return is_good
+
     def dfs_l1_query(self, obs_id, detector):
         """ Query L1 data from DFS. """
         pass