diff --git a/script/optics/ExitSlitYScan.py b/script/optics/ExitSlitYScan.py
index 8fa51df3..633fb2d2 100644
--- a/script/optics/ExitSlitYScan.py
+++ b/script/optics/ExitSlitYScan.py
@@ -2,10 +2,12 @@
 exit slit calibration scan
 
 manual settings: photon energy 800 eV (G1200), FE = 1 x 1, ADC/Keithley averaging
+
+set keithleys manuall to free run!
 """
 
 POSITIONERS = (ExitSlitY)
-SENSORS = (RefCurrent, MachineCurrent)
+SENSORS = (SampleCurrent,RefCurrent, MachineCurrent)
 STARTPOS = (-0.5)
 ENDPOS = (1.0)
 STEPS = 0.01