diff --git a/measurementGD.py b/measurementGD.py
index 0b4ed41..b6e614e 100644
--- a/measurementGD.py
+++ b/measurementGD.py
@@ -105,7 +105,7 @@
     # Wait for stop
     print("measurement start.")
     winsound.Beep(1000, 200)
-    recode_dulation = 3  # sec
+    recode_dulation = 30  # sec
     for i in range(recode_dulation):
         time.sleep(1)
         print(i + 1, "/", recode_dulation, "sec")