diff --git a/src/qumada/measurement/device_object.py b/src/qumada/measurement/device_object.py
index 608230f..71c9f9e 100644
--- a/src/qumada/measurement/device_object.py
+++ b/src/qumada/measurement/device_object.py
@@ -616,7 +616,7 @@ def measured_ramp(
     ):
         if station is None:
             station = self._parent_device.station
-        if isinstance(station, Station):
+        if not isinstance(station, Station):
             raise TypeError("No valid station assigned!")
         if self.locked:
             raise Exception(f"{self.name} is locked!")
diff --git a/src/qumada/measurement/scripts/generic_measurement.py b/src/qumada/measurement/scripts/generic_measurement.py
index 15317e9..39f1e8d 100644
--- a/src/qumada/measurement/scripts/generic_measurement.py
+++ b/src/qumada/measurement/scripts/generic_measurement.py
@@ -1267,11 +1267,11 @@ def run(self):
                     measurement instruments! Only recommended\
                     for debugging."
                 )
-
+            timeout_timer = 0
             while not all(buffer.is_finished() for buffer in list(self.buffers)):
-                timer += 0.1
+                timeout_timer += 0.1
                 sleep(0.1)
-                if timer >= buffer_timeout_multiplier * self._burst_duration:
+                if timeout_timer >= buffer_timeout_multiplier * self._burst_duration:
                     raise TimeoutError
             try:
                 trigger_reset()