diff --git a/mpmaster/src/main/java/com/xypower/mpmaster/LogcatHandler.java b/mpmaster/src/main/java/com/xypower/mpmaster/LogcatHandler.java
index f2dbfd77..abf8c103 100644
--- a/mpmaster/src/main/java/com/xypower/mpmaster/LogcatHandler.java
+++ b/mpmaster/src/main/java/com/xypower/mpmaster/LogcatHandler.java
@@ -7,6 +7,12 @@ import java.util.logging.LogRecord;
 
 public class LogcatHandler extends Handler {
 
+    public LogcatHandler(String tag) {
+        mTag = tag;
+    }
+
+    private String mTag = null;
+
     private static final int TAG_MAX_LENGTH = 23;
 
     static String getLevelName(int level) {
@@ -75,9 +81,9 @@ public class LogcatHandler extends Handler {
 
         int level = levelFromLevel(record.getLevel());
 
-        Log.println(level, tag, record.getMessage());
+        Log.println(level, mTag, record.getMessage());
         if (record.getThrown() != null) {
-            Log.println(level, tag, Log.getStackTraceString(record.getThrown()));
+            Log.println(level, mTag, Log.getStackTraceString(record.getThrown()));
         }
     }
 
diff --git a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
index 49a56bc0..7b790e7b 100644
--- a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
+++ b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
@@ -56,7 +56,7 @@ public class MpMasterService extends Service {
         System.loadLibrary("mpmaster");
     }
 
-    public static final String TAG = "MpMaster";
+    public static final String TAG = "MPMST";
 
     public Logger logger;
 
@@ -134,7 +134,7 @@ public class MpMasterService extends Service {
         LogFormatter logFormatter = new LogFormatter();
 
         if (BuildConfig.DEBUG) {
-            LogcatHandler logcatHandler = new LogcatHandler();
+            LogcatHandler logcatHandler = new LogcatHandler(TAG);
             logcatHandler.setFormatter(logFormatter);
             logger.addHandler(logcatHandler);
         }
@@ -254,7 +254,7 @@ public class MpMasterService extends Service {
         mMntnMode = masterConfig.mntnMode != 0;
         mQuickHbMode = masterConfig.quickHbMode != 0;
         mUsingAbsHbTime = masterConfig.usingAbsHbTime != 0;
-        mHeartbeatDuration = masterConfig.heartbeat * 10;   // minute to second
+        mHeartbeatDuration = masterConfig.heartbeat * 60;   // minute to second
         mAbsHeartbeatTimes = masterConfig.absHeartbeats;
         mSeparateNetwork = masterConfig.separateNetwork != 0;
         mTimeOfMpAppAlive = masterConfig.mpappMonitorTimeout;