diff --git a/script/OPD_accurracy_check_scan.py b/script/OPD_accurracy_check_scan.py
index 7dfc44c..8a1b416 100644
--- a/script/OPD_accurracy_check_scan.py
+++ b/script/OPD_accurracy_check_scan.py
@@ -34,8 +34,8 @@ set_context(path = "{data}/{year}_{month}/{date}/{date}_{time}_"  + str(SECTION)
 
 #################################################################################
 # define all PVs
-#import  ch.psi.pshell.epics.ProcessVariable as PV
-import  ch.psi.pshell.epics.ChannelDouble as PV
+import  ch.psi.pshell.epics.ProcessVariable as PV
+#import  ch.psi.pshell.epics.ChannelDouble as PV
 
 # controlled variabales
 cv_kly_pow      = PV("set_power", SECTION + "-RSYS:SET-KLY-POWER")