diff --git a/sensgw/protocols/prologix.py b/sensgw/protocols/prologix.py
index a099f20..aae8378 100644
--- a/sensgw/protocols/prologix.py
+++ b/sensgw/protocols/prologix.py
@@ -70,7 +70,13 @@ class PrologixEndpointLoop:
             ":SENS:VOLT:DC:DIG 7",  # max digits
             # offset drift?
             ":SYST:AZER:STAT ON",
+            # trig
             ":TRIG:SOUR IMM",
+            ":TRIG:COUN 1",
+            ":SAMP:COUN 1",
+            ":TRIG:DEL 0",
+            # read only
+            ":FORM:ELEM READ",
             # turn off VFD
             ":DISP:ENAB OFF",
         ]