diff --git a/script/KeithleyVoltageScan.py b/script/KeithleyVoltageScan.py
index e453a4e8..3e721b4b 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 = (0.,15.)
-STEPS = 0.5
+POSITIONS = (15.,-15.)
+STEPS = 1.0
 LATENCY = 1.0
 RELATIVE = False