diff --git a/geomagio/Metadata.py b/geomagio/Metadata.py
index 6a2d763a20098d9e05a746c7e54a3335281b70bb..3a02a17a879cb9d21166a7fefc2bf6f4fefa2737 100644
--- a/geomagio/Metadata.py
+++ b/geomagio/Metadata.py
@@ -227,9 +227,9 @@ _INSTRUMENT_METADATA = [
             "channels": {
                 # each channel maps to a list of components to calculate nT
                 # TODO: calculate these lists based on "FGE" type
-                "U": [{"channel": "U_Volt", "offset": 12676, "scale": 967.7}],
+                "U": [{"channel": "U_Volt", "offset": 12620, "scale": 967.7}],
                 "V": [{"channel": "V_Volt", "offset": 0, "scale": 969.7}],
-                "W": [{"channel": "W_Volt", "offset": 54832, "scale": 973.4}],
+                "W": [{"channel": "W_Volt", "offset": 54907, "scale": 973.4}],
             },
             "electronics": {
                 "serial": "E0568",