diff --git a/src/instruments/text_data_sources.yaml b/src/instruments/text_data_sources.yaml
index 7731578..a4bcc7e 100644
--- a/src/instruments/text_data_sources.yaml
+++ b/src/instruments/text_data_sources.yaml
@@ -110,5 +110,3 @@ ACSM_TOFWARE:
     - "utf-8"
     - "utf-8"
 
-  timestamp: 
-    - ['Date_Time']