diff --git a/script/KeithleyVoltageScan.py b/script/KeithleyVoltageScan.py
index df7241fa..8b6fab96 100644
--- a/script/KeithleyVoltageScan.py
+++ b/script/KeithleyVoltageScan.py
@@ -5,8 +5,8 @@ Keithley voltage scan
 
 POSITIONERS = (Keithley2Voltage)
 SENSORS = (Counts, SampleCurrent, RefCurrent, MachineCurrent, EnergyDistribution, AngleDistribution, Scienta.dataMatrix)
-POSITIONS = (-10,10)
-STEPS = 20
+POSITIONS = (-20,20)
+STEPS = 40
 LATENCY = 1.0
 
 RELATIVE = False