diff --git a/src/measure/utTc.erl b/src/measure/utTc.erl
index d54f818..992b9cd 100644
--- a/src/measure/utTc.erl
+++ b/src/measure/utTc.erl
@@ -106,22 +106,22 @@ collector(0, Max, Min, Sum, ProcCnt, List) ->
    {Max, Min, Sum, Aver, Greater, Less};
 collector(Index, Max, Min, Sum, ProcCnt, List) ->
    receive
-      {result, Microsecond} ->
-         NewSum = Sum + Microsecond,
+      {result, Nanosecond} ->
+         NewSum = Sum + Nanosecond,
          if
             Max == 0 ->
-               NewMax = NewMin = Microsecond;
-            Max < Microsecond ->
-               NewMax = Microsecond,
+               NewMax = NewMin = Nanosecond;
+            Max < Nanosecond ->
+               NewMax = Nanosecond,
                NewMin = Min;
-            Min > Microsecond ->
+            Min > Nanosecond ->
                NewMax = Max,
-               NewMin = Microsecond;
+               NewMin = Nanosecond;
             true ->
                NewMax = Max,
                NewMin = Min
          end,
-         collector(Index - 1, NewMax, NewMin, NewSum, ProcCnt, [Microsecond | List])
+         collector(Index - 1, NewMax, NewMin, NewSum, ProcCnt, [Nanosecond | List])
    after 1800000 ->
       io:format("execute time out~n"),
       ok