diff --git a/script/EnergyScan.py b/script/EnergyScan.py
index acc5d30..acdcc69 100644
--- a/script/EnergyScan.py
+++ b/script/EnergyScan.py
@@ -70,7 +70,7 @@ def _startPlot(type):
                 break
             e = energy.read()
             if (abs(e-cur)) > 0.1:            
-                v = - (keithley_2a.read() / ((keithley_1a if (type==1) else keithley_3a).read() ))
+                v = abs((keithley_2a.read() / ((keithley_1a if (type==1) else keithley_3a).read() )))
                 p.getSeries(1).appendData(e,v)    
                 cur = e
             time.sleep(0.2)