diff --git a/electrode_check.py b/electrode_check.py
index 31e7a2a..4d1d7f2 100644
--- a/electrode_check.py
+++ b/electrode_check.py
@@ -275,7 +275,7 @@ def main():
             int_ranges.append(int(r.name.replace('BIP', '').replace('VOLTS', '')))
 
         for idx in np.argsort(int_ranges):
-            if max_v * gain / 1000 >= int_ranges[idx]:
+            if max_v * gain / 1000 <= int_ranges[idx]:
                 range_index = idx
                 break