Index: dialin/dg/heat_disinfect.py
===================================================================
diff -u -rc1ec3baacb779f5176e3a7a619fe49f2dc4c19cd -re92316054288c0d3c86bbadc23dec1c9e55094e9
--- dialin/dg/heat_disinfect.py	(.../heat_disinfect.py)	(revision c1ec3baacb779f5176e3a7a619fe49f2dc4c19cd)
+++ dialin/dg/heat_disinfect.py	(.../heat_disinfect.py)	(revision e92316054288c0d3c86bbadc23dec1c9e55094e9)
@@ -62,11 +62,10 @@
     NELSON_NONE = 0
     NELSON_INOCULATE = 1
     NELSON_HEAT_DISINFECT = 2
-    NELSON_POS_CONTROL_CHEM_DISINFECT = 3
-    NELSON_POS_CONTROL_HEAT_DISINFECT = 4
-    NELSON_CHEM_DISINFECT = 5
-    NELSON_DRAIN_SAMPLE = 6
-    NUM_OF_NELSON_SUPPORT = 7
+    NELSON_POS_CONTROL_HEAT_DISINFECT = 3
+    NELSON_CHEM_DISINFECT = 4
+    NELSON_DRAIN_SAMPLE = 5
+    NUM_OF_NELSON_SUPPORT = 6
 
 
 class HeatDisinfect(AbstractSubSystem):
Index: tests/test_nelson_labs_disinfect.py
===================================================================
diff -u -rc1ec3baacb779f5176e3a7a619fe49f2dc4c19cd -re92316054288c0d3c86bbadc23dec1c9e55094e9
--- tests/test_nelson_labs_disinfect.py	(.../test_nelson_labs_disinfect.py)	(revision c1ec3baacb779f5176e3a7a619fe49f2dc4c19cd)
+++ tests/test_nelson_labs_disinfect.py	(.../test_nelson_labs_disinfect.py)	(revision e92316054288c0d3c86bbadc23dec1c9e55094e9)
@@ -289,15 +289,6 @@
     get_sensors_actuators_info(mode, f)
 
 
-def run_nelson_chem_positive_control():
-    current_dir = os.getcwd()
-    mode = NelsonSupportModes.NELSON_POS_CONTROL_CHEM_DISINFECT.name
-    log_file = os.path.join(current_dir, mode.lower() + '.log')
-    f = open(log_file, "w")
-    dg.heat_disinfect.cmd_set_nelson_support_mode(NelsonSupportModes.NELSON_POS_CONTROL_CHEM_DISINFECT.value)
-    get_sensors_actuators_info(mode, f)
-
-
 def run_nelson_heat_disinfect():
     current_dir = os.getcwd()
     mode = NelsonSupportModes.NELSON_HEAT_DISINFECT.name
@@ -330,8 +321,6 @@
 
     #run_nelson_heat_positive_control()
 
-    #run_nelson_chem_positive_control()
-
     #run_nelson_heat_disinfect()
 
     #run_nelson_chem_disinfect()
\ No newline at end of file