diff --git a/script/jan/hyst_Dy_singleenergy.py b/script/jan/hyst_Dy_singleenergy.py
index c447a7b..85f230e 100644
--- a/script/jan/hyst_Dy_singleenergy.py
+++ b/script/jan/hyst_Dy_singleenergy.py
@@ -9,6 +9,10 @@ B2 = -B1
 nr_loops = 1        # number of loops to acquire
 
 
+while temperature_readback.read() > 1.9:
+    time.sleep(1)
+
+
 open_valve()
 
 loop_count = 0