diff --git a/tomcat_bec/devices/pco_edge/pcoedgecamera.py b/tomcat_bec/devices/pco_edge/pcoedgecamera.py
index b80faaa..aad85f7 100644
--- a/tomcat_bec/devices/pco_edge/pcoedgecamera.py
+++ b/tomcat_bec/devices/pco_edge/pcoedgecamera.py
@@ -70,12 +70,13 @@ class PcoEdge5M(PSIDeviceBase, PcoEdgeBase):
 
     analysis_signal = Cpt(Signal, name="analysis_signal", kind=Kind.hinted, doc="Analysis Signal")
     analysis_signal2 = Cpt(Signal, name="analysis_signal2", kind=Kind.hinted, doc="Analysis Signal")
-    preview = Cpt(PreviewSignal, ndim=2, name="preview", doc="Camera raw data preview signal")
+    preview = Cpt(PreviewSignal, ndim=2, name="preview", doc="Camera raw data preview signal", num_rotation_90=1, transpose=False)
     preview_corrected = Cpt(
         PreviewSignal,
         ndim=2,
         name="preview_corrected",
         doc="Camera preview signal with flat and dark correction",
+        num_rotation_90=1, transpose=False
     )
     progress = Cpt(
         ProgressSignal,
diff --git a/tomcat_bec/devices/std_daq/std_daq_live_processing.py b/tomcat_bec/devices/std_daq/std_daq_live_processing.py
index 714c5ea..5368d24 100644
--- a/tomcat_bec/devices/std_daq/std_daq_live_processing.py
+++ b/tomcat_bec/devices/std_daq/std_daq_live_processing.py
@@ -126,7 +126,7 @@ class StdDaqLiveProcessing:
         corrected_data = np.divide(
             data - dark, flat_corr, out=np.zeros_like(data, dtype=np.float32), where=flat_corr != 0
         )
-        return corrected_data
+        return np.clip(corrected_data, a_min=0, a_max=None)
 
     @typechecked
     def _load_and_update_reference(
diff --git a/tomcat_bec/scans/simple_scans.py b/tomcat_bec/scans/simple_scans.py
index 432278f..8419ee6 100644
--- a/tomcat_bec/scans/simple_scans.py
+++ b/tomcat_bec/scans/simple_scans.py
@@ -262,11 +262,11 @@ class AcquireReferences(ScanBase):
         yield from self.components.scan_report_instructions()
 
     def pre_scan(self):
-        yield from self.components.acquire_references(self.num_darks, self.num_flats, self.exp_time, restart=True, restore=False)
+        yield from self.components.acquire_references(self.num_darks, self.num_flats, self.exp_time)
         
     def scan_core(self):
-        pass
-
+        yield None
+    
 
 class TomoScan(LineScan):
     scan_name = "tomo_line_scan"