diff --git a/static/js/data.js b/static/js/data.js
index a8164df5..1d45fc09 100644
--- a/static/js/data.js
+++ b/static/js/data.js
@@ -73,6 +73,7 @@ class excitationBase {
   constructor(initial, final) {
     this.initial = initial;
     this.final = final
+    this.T1=NaN
   }
 }
 class excitationValue extends excitationBase {