diff --git a/script/jan/hyst_Dy.py b/script/jan/hyst_Dy.py
index afdeb69..7004126 100644
--- a/script/jan/hyst_Dy.py
+++ b/script/jan/hyst_Dy.py
@@ -1,30 +1,39 @@
 off_cplus = -6.5
 off_cminus = -2.5
-rrate = 2.0
-e1 = 1290.2
-e2 = 1283.0
+rrate = 2.0        # ramping speed of mag field
+e1 = 1290.2        # energy 1 (usually on edge)
+e2 = 1283.0        # energy 2 (pre edge)
 
+B1 = 4.0            # field span
+B2 = -B1
+nr_loops = 3        # number of loops to acquire
 
+print "TEST Loop # ",nr_loops," finished."
 
 
 open_valve()
 
-set_pol_cplus(offset = off_cplus)
-set_file('Dy_hyst_plus')
-hyst_cont(field_x, 6.8, -6.8, rrate, [e1, e2])
+loop_count = 0
+while loop_count < nr_loops:
 
-set_pol_cminus(offset = off_cminus)
-set_file('Dy_hyst_minus')
-hyst_cont(field_x, -6.8, 6.8, rrate, [e1, e2])
-
-set_pol_cminus(offset = off_cminus)
-set_file('Dy_hyst_minus')
-hyst_cont(field_x, 6.8, -6.8, rrate, [e1, e2])
-
-set_pol_cplus(offset = off_cplus)
-set_file('Dy_hyst_plus')
-hyst_cont(field_x, -6.8, 6.8, rrate, [e1, e2])
+    set_pol_cplus(offset = off_cplus)
+    set_file('Dy_hyst_plus')
+    hyst_cont(field_x, B1, B2, rrate, [e1, e2])
+    
+    set_pol_cminus(offset = off_cminus)
+    set_file('Dy_hyst_minus')
+    hyst_cont(field_x, B2, B1, rrate, [e1, e2])
+    
+    set_pol_cminus(offset = off_cminus)
+    set_file('Dy_hyst_minus')
+    hyst_cont(field_x, B1, B2, rrate, [e1, e2])
+    
+    set_pol_cplus(offset = off_cplus)
+    set_file('Dy_hyst_plus')
+    hyst_cont(field_x, B2, B1, rrate, [e1, e2])
 
+    loop_count = loop_count + 1
+    print "Loop # ",loop_count," finished."
 
 close_valve()