diff --git a/geomagio/Metadata.py b/geomagio/Metadata.py
index d335a1ffc71a81cb3c22dccceb1d95d09c4b632f..9fce2c3b2ad7c653c5333e6c4af61664c504e807 100644
--- a/geomagio/Metadata.py
+++ b/geomagio/Metadata.py
@@ -492,7 +492,7 @@ _INSTRUMENT_METADATA = [
                 # TODO: calculate these lists based on "FGE" type
                 "U": [{"channel": "U_Volt", "offset": 0, "scale": 944.935}],
                 "V": [{"channel": "V_Volt", "offset": 0, "scale": 964.909}],
-                "W": [{"channel": "W_Volt", "offset": 0, "scale": 954.433}],
+                "W": [{"channel": "W_Volt", "offset": 0, "scale": 966.893}],
             },
             # this info should get updated when available
             "electronics": {
@@ -501,7 +501,7 @@ _INSTRUMENT_METADATA = [
                 # these are calculated using Ohm's law, given scaling resistor value (38.3 kohm), and given nT/mA values.
                 "x-scale": 944.935,  # nT/V
                 "y-scale": 964.909,  # nT/V
-                "z-scale": 954.433,  # nT/V
+                "z-scale": 966.893,  # nT/V
                 "temperature-scale": 0.01,  # V/K
             },
             "sensor": {