diff --git a/src/channels.rs b/src/channels.rs
index 588e994..c2a2900 100644
--- a/src/channels.rs
+++ b/src/channels.rs
@@ -137,12 +137,7 @@ impl<'a> Channels<'a> {
     }
 
     pub fn set_i(&mut self, channel: usize, i_set: ElectricCurrent) -> ElectricCurrent {
-        let vref_meas = match channel.into() {
-            0 => self.channel0.vref_meas,
-            1 => self.channel1.vref_meas,
-            _ => unreachable!(),
-        };
-        let center_point = vref_meas;
+        let center_point = self.get_center(channel);
         let r_sense = ElectricalResistance::new::<ohm>(R_SENSE);
         let voltage = i_set * 10.0 * r_sense + center_point;
         let voltage = self.set_dac(channel, voltage);