diff --git a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/service/Device.java b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/service/Device.java
index 140bbfeb..fcc1cffa 100644
--- a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/service/Device.java
+++ b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/service/Device.java
@@ -113,7 +113,7 @@ public class Device {
                 d341Count+=count;
                 d341bytes += bytes;
                 lastRxTime = LocalDateTime.now();
-                if(model== GnssDevice.MODEL_G510 && bytes>100) abnormalD341Num++;
+                if(model== GnssDevice.MODEL_G510 && bytes>1400) abnormalD341Num++;
                 break;
             case 0xd342:
                 d342Count ++;