diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0b7c12213c10c9725fc19e0ca58a50dde1fcc07d..78863292a8367797dd3529c188ab496f4bbeaf7e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
 ### Bug Fixes
 - PBMod updated according to Table 5 of ESS-0038258 revision 6.
 - PBDest refers to Table 8 of ESS-0038258 revision 6.
+- DTL1 is removed from NCL set because DTL2FC is sufficient.
 
 
 
diff --git a/init/databuffer-ess.json b/init/databuffer-ess.json
index fa8c89f5b20e081c079b51cee5629b2e1c2cd51f..f3281ca921fdd64b6f761d43e55400caf9c632d4 100644
--- a/init/databuffer-ess.json
+++ b/init/databuffer-ess.json
@@ -95,10 +95,6 @@
       "type": "Faraday Cup",
       "limits": "(1Hz, 50us)/(14Hz, 5us), 62.5 mA"
     },
-    "DTL1": {
-        "id": 35,
-        "type": "Faraday Cup"
-    },
     "DTL2": {
       "id": 40,
       "type": "Faraday Cup",