diff --git a/src/channels.rs b/src/channels.rs
index cfec178..65bf557 100644
--- a/src/channels.rs
+++ b/src/channels.rs
@@ -525,9 +525,15 @@ impl<'a> Channels<'a> {
     }
 
     pub fn current_abs_max_tec_i(&mut self) -> ElectricCurrent {
-        max_by(self.get_tec_i(0).abs(),
-               self.get_tec_i(1).abs(),
-               |a, b| a.partial_cmp(b).unwrap_or(core::cmp::Ordering::Equal))
+        if self.hwrev.major > 2 {
+            max_by(self.get_tec_i(0).abs(),
+                   self.get_tec_i(1).abs(),
+                   |a, b| a.partial_cmp(b).unwrap_or(core::cmp::Ordering::Equal))
+        } else {
+            max_by(self.get_i(0).abs(),
+                   self.get_i(1).abs(),
+                   |a, b| a.partial_cmp(b).unwrap_or(core::cmp::Ordering::Equal))
+        }
     }
 }