diff --git a/pyproject.toml b/pyproject.toml
index c6b9c0a14..73ab06339 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -103,7 +103,7 @@ skip = ["pp*", "*_ppc64le", "*-musllinux*", "*_s390x"]
 
 [tool.ruff]
 target-version = "py39"
-extend-exclude = ["./src/asammdf/gui/ui"]
+extend-exclude = ["./src/asammdf/gui/ui", "./ext"]
 force-exclude = true
 
 [tool.ruff.lint]
diff --git a/src/asammdf/blocks/bus_logging_utils.py b/src/asammdf/blocks/bus_logging_utils.py
index 7cbb311b9..f422e753a 100644
--- a/src/asammdf/blocks/bus_logging_utils.py
+++ b/src/asammdf/blocks/bus_logging_utils.py
@@ -441,8 +441,24 @@ def get_conversion(signal: Signal) -> v4b.ChannelConversion | None:
 
     a, b = float(signal.factor), float(signal.offset)
 
-    if signal.values:
-        conv = {}
+    conv = {}
+
+    scale_ranges = getattr(signal, "scale_ranges", None)
+    if scale_ranges:
+        for i, scale_info in enumerate(scale_ranges):
+            conv[f"upper_{i}"] = scale_info["max"]
+            conv[f"lower_{i}"] = scale_info["min"]
+            conv[f"text_{i}"] = from_dict({"a": scale_info["factor"], "b": scale_info["offset"]})
+
+        for i, (val, text) in enumerate(signal.values.items(), len(scale_ranges)):
+            conv[f"upper_{i}"] = val
+            conv[f"lower_{i}"] = val
+            conv[f"text_{i}"] = text
+
+        conv["default"] = from_dict({"a": a, "b": b})
+
+    elif signal.values:
+
         for i, (val, text) in enumerate(signal.values.items()):
             conv[f"upper_{i}"] = val
             conv[f"lower_{i}"] = val