diff --git a/configuration/python/AllenConf/hlt1_calibration_lines.py b/configuration/python/AllenConf/hlt1_calibration_lines.py
index fa38c7f1a833a88412425295f5fe8256902a94a3..63ad92b0bed492ac55bdfce3822f597729fc2d71 100644
--- a/configuration/python/AllenConf/hlt1_calibration_lines.py
+++ b/configuration/python/AllenConf/hlt1_calibration_lines.py
@@ -27,7 +27,8 @@ def make_pi02gammagamma_line(calo,
                              pre_scaler=0.05,
                              pre_scaler_hash_string=None,
                              post_scaler_hash_string=None,
-                             enable_tupling=False):
+                             enable_tupling=False,
+                             enable_monitoring=True):
     number_of_events = initialize_number_of_events()
 
     return make_algorithm(
@@ -51,7 +52,8 @@ def make_pi02gammagamma_line(calo,
         maxE19_clusters=1.0,
         minPtEta=200,  #Pi0Pt>minPtEta*(10-Pi0Eta)
         max_n_pvs=1,
-        enable_tupling=enable_tupling)
+        enable_tupling=enable_tupling,
+        enable_monitoring=enable_monitoring)
 
 
 def make_dst_line(dstars,
diff --git a/device/selections/lines/photon/include/TwoCaloClusters.cuh b/device/selections/lines/photon/include/TwoCaloClusters.cuh
index 9e4e8c82f35022b8247cd8b9a5b35fcc1bdc0115..0c655ded9fca97ecd0a8f744ece0ccc4eddee11a 100644
--- a/device/selections/lines/photon/include/TwoCaloClusters.cuh
+++ b/device/selections/lines/photon/include/TwoCaloClusters.cuh
@@ -174,11 +174,11 @@ namespace two_calo_clusters_line {
                                               "Discard candidates with bremsstrahlung-matched clusters"};
     Allen::Property<float> m_histogramdiphotonMassMin {this,
                                                        "histogram_diphoton_mass_min",
-                                                       0.f,
+                                                       50.f,
                                                        "histogram_diphoton_mass_min description"};
     Allen::Property<float> m_histogramdiphotonMassMax {this,
                                                        "histogram_diphoton_mass_max",
-                                                       2000.f,
+                                                       300.f,
                                                        "histogram_diphoton_mass_max description"};
     Allen::Property<unsigned int> m_histogramdiphotonMassNBins {this,
                                                                 "histogram_diphoton_mass_nbins",
@@ -197,7 +197,7 @@ namespace two_calo_clusters_line {
                                                               100u,
                                                               "histogram_diphoton_pt_nbins description"};
 
-    Allen::Monitoring::Histogram<> m_histogram_diphoton_mass {this, "diphoton_mass", "m(diphoton)", {100u, 0.f, 2e3f}};
+    Allen::Monitoring::Histogram<> m_histogram_diphoton_mass {this, "diphoton_mass", "m(diphoton)", {100u, 50.f, 3e2f}};
     Allen::Monitoring::Histogram<> m_histogram_diphoton_pt {this, "diphoton_pt", "pT(diphoton)", {100u, 0.f, 2e3f}};
   };
 } // namespace two_calo_clusters_line