diff --git a/site_ansto/instrument/pelican/config/hmm/detector.tcl b/site_ansto/instrument/pelican/config/hmm/detector.tcl
index 702dbc14..28097471 100644
--- a/site_ansto/instrument/pelican/config/hmm/detector.tcl
+++ b/site_ansto/instrument/pelican/config/hmm/detector.tcl
@@ -1,2 +1,9 @@
 # Detector voltage controller
+
 fileeval $cfPath(hmm)/sct_orhvps_common.tcl
+
+#::scobj::dethvps::init ca1-quokka 4001 4.1
+#dhv1 max 2600
+#dhv1 lower 19
+#dhv1 upper 57
+