diff --git a/bench/common.py b/bench/common.py
index 565feaa..98c2623 100644
--- a/bench/common.py
+++ b/bench/common.py
@@ -26,6 +26,7 @@ def _find_dev_ind(self, rm):
                 self.address = res
                 self._instr = rm.open_resource(self.address)
                 self._instr.timeout = 15000
+                self._instr.write("*CLS")
                 return True
 
         return False
diff --git a/bench/keysight/e36233a.py b/bench/keysight/e36233a.py
index d8e99c2..6bb19a2 100644
--- a/bench/keysight/e36233a.py
+++ b/bench/keysight/e36233a.py
@@ -99,6 +99,7 @@ def __init__(self, address: str = None) -> None:
             self.address = address
             self._instr = pyvisa.ResourceManager().open_resource(self.address)
             self._instr.timeout = 15000
+            self._instr.write("*CLS")
             q_id = self._instr.query("*IDN?")
             if self.id not in q_id:
                 raise Exception(