diff --git a/hp4155/memristor (Version 4.1)/help_pulse.py b/hp4155/memristor (Version 4.1)/help_pulse.py
index f6a4287e5ce18ef24362f502bf63825177bf504c..3ac31323d741b192195525064531bed2fbc53df7 100644
--- a/hp4155/memristor (Version 4.1)/help_pulse.py	
+++ b/hp4155/memristor (Version 4.1)/help_pulse.py	
@@ -169,13 +169,13 @@ def constant_meas(dictionary,device):
     smu_v.update(
         iname = 'I2',
         vname = 'V2',
-        mode = 'V',
+        mode = 'VPULSE',
         func = 'CONS'
     )
     smu_help.update(
         iname = 'I3',
         vname = 'V3',
-        mode = 'VPULSE',
+        mode = 'V',
         func = 'VAR1'
     )
     smu_ground.update(