set_pol_cplus(offset = None)
set_file('Se_plus')
open_valve()
otf(start=1410, end=1490, time=3, delay=5)

#set pol c-
#otf 1410 1490 3 delay 5
#file Se_minus
#at_end close
#start
set_pol_cminus(offset = None)
set_file('Se_minus')
otf(start=1410, end=1490, time=3, delay=5)
close_valve()