diff --git a/script/EnergyScan.py b/script/EnergyScan.py
index 818df14..3e6a8f1 100644
--- a/script/EnergyScan.py
+++ b/script/EnergyScan.py
@@ -39,7 +39,8 @@ def _startPlot(type):
     p.addSeries(LinePlotSeries("Energy"))
     s= p.getSeries(1)
     cur = 0
-    while running:    
+    while running:
+        time.sleep(3.0) 
         try:
             if  otf_start.read() == 0:
                 break