diff --git a/script/local.py b/script/local.py
index bf4325c..9491346 100644
--- a/script/local.py
+++ b/script/local.py
@@ -232,20 +232,20 @@ def set_range(keithley, value):
 
 #only test .5 to .25
 def set_fe(opening):
-    opening = float(opening*100)
+    opening = int(opening*1000)
     if opening==0:
         aperture.write("closed")
-    elif opening==0.1:
+    elif opening==100:
         aperture.write("0.1x0.1 mm")
-    elif opening==0.25:
+    elif opening==250:
         aperture.write("0.25x0.25 mm")
-    elif opening==0.5:
+    elif opening==500:
         aperture.write("0.5x0.5 mm")
-    elif opening==1.00:
+    elif opening==1000:
         aperture.write("1x1 mm")
-    elif opening==1.25:
+    elif opening==1250:
         aperture.write("1.25x1.25 mm")
-    elif opening==2.0:
+    elif opening==2000:
         aperture.write("2x2 mm")
     else:
         raise Exception("Invalid aperture opening: " + str(opening))