diff --git a/src/service/disinfection_ctl_service.cpp b/src/service/disinfection_ctl_service.cpp
index 66f496e..a51bfa4 100644
--- a/src/service/disinfection_ctl_service.cpp
+++ b/src/service/disinfection_ctl_service.cpp
@@ -81,6 +81,12 @@ string DisinfectionCtrlService::createDisinfectionID() {
                      tm.tm_hour,                                                   //
                      tm.tm_min, tm.tm_sec);
 }
+static bool zfeq(float a, float b, float eps = 0.01) {
+  if (fabs(a - b) < eps) {
+    return true;
+  }
+  return false;
+}
 float DisinfectionCtrlService::getDisinfectionDValue(float ppm) {
   /**
    * @brief
@@ -91,6 +97,10 @@ float DisinfectionCtrlService::getDisinfectionDValue(float ppm) {
    *  浓度大于150时,y=-0.1405X+40.369
    */
 
+  if (zfeq(ppm, 0)) {
+    return -1;
+  }
+
   float dvalue = 0;
 
   if (ppm < 150) {
@@ -115,15 +125,20 @@ void DisinfectionCtrlService::computeRemainTime(DisinfectionContext& context) {
    */
   float dvalue = context.dvalue;
 
-  /**
-   * @brief 计算 m_nowLoglevel
-   */
-  context.m_nowLoglevel += DVALUE_COMPUTEPERIOD_TIME_S / (dvalue * 60);
-  if (context.m_targetLoglevel >= context.m_nowLoglevel) {
-    context.m_remaintime = (context.m_targetLoglevel - context.m_nowLoglevel) * (dvalue * 60);
+  if (dvalue > 0) {
+    /**
+     * @brief 计算 m_nowLoglevel
+     */
+    context.m_nowLoglevel += DVALUE_COMPUTEPERIOD_TIME_S / (dvalue * 60);
+    if (context.m_targetLoglevel >= context.m_nowLoglevel) {
+      context.m_remaintime = (context.m_targetLoglevel - context.m_nowLoglevel) * (dvalue * 60);
+    } else {
+      context.m_remaintime = 0;
+    }
   } else {
-    context.m_remaintime = 0;
+    //
   }
+
   logger->info("computeRemainTime minh2o2 {} dvalue {}", context.h2o2data.min_h2o2, dvalue);
 }
 
@@ -186,39 +201,39 @@ void DisinfectionCtrlService::initContext(DisinfectionContext& context,
   //                 m_context.m_remaintime
 
   context.csvlogger->write(
-      "date,"                                                                            //
-      "hydrogen_peroxide_volume[1],temperature[1],relative_humidity[1],h2o_h2o2_rs[1],"  //
+      "date,"                                                                                  //
+      "hydrogen_peroxide_volume(ppm),temperature(C),relative_humidity(%RH),h2o_h2o2_rs(%RS),"  //
       // "h2o22,temp2,humi2,saturation2,"            //
       // "h2o23,temp3,humi3,saturation3,"            //
-      "dvalue,loglevel,targetloglevel,"  //
-      "heating,blower,compressor,pump,"  //
-      // "disinfectantVolume,"              //
-      "remaintime\n"  //
+      "dvalue,loglevel,targetloglevel,"         //
+      "heating,blower,compressor,pump(g/min),"  //
+      "disinfectantVolume(g),"                  //
+      "remaintime(s)\n"                         //
   );
 }
-
-void DisinfectionCtrlService::dumpDisinfectionLogsToCSV(DisinfectionContext& context) {
+static string formattimeS(int sec) { return fmt::format("{:0>2}:{:0>2}:{:0>2}", sec / 3600, sec % 3600 / 60, sec % 60); }
+void          DisinfectionCtrlService::dumpDisinfectionLogsToCSV(DisinfectionContext& context) {
   auto* sensors = &m_context.h2o2data.h2o2sensor_data[0];
   auto  ds      = m_deviceIoControlService;
   context.csvlogger->write(
       fmt::format("{},"           //
-                  "{},{},{},{},"  //
-                  // "{},{},{},{},"  //
-                  // "{},{},{},{},"  //
-                  "{},{},{},"     //
-                  "{},{},{},{},"  //
-                  // "{},{},{},{},"  //
-                  // "{},"   //
-                  "{}\n"  //
-                  ,
-                  getTime(),                                                                  //
-                  sensors[0].h2o2, sensors[0].temp, sensors[0].humid, sensors[0].saturation,  //
-                  // sensors[1].h2o2, sensors[1].temp, sensors[1].humid, sensors[1].saturation,                                          //
-                  // sensors[2].h2o2, sensors[2].temp, sensors[2].humid, sensors[2].saturation,                                          //
-                  m_context.dvalue, m_context.m_nowLoglevel, (int)m_context.m_targetLoglevel,                                         //
-                  ds->heatingStrip_getstate(), ds->airBlower_getstate(), ds->airCompressor_getstate(), ds->sprayLiquidPump_getGPM(),  //
-                  // m_deviceIoControlService->getDisinfectantVolume_g(),                                                                //
-                  m_context.m_remaintime));
+                           "{},{},{},{},"  //
+                           // "{},{},{},{},"  //
+                           // "{},{},{},{},"  //
+                           "{:.2f},{:.2f},{:.2f},"  //
+                           "{},{},{},{},"           //
+                           // "{},{},{},{},"  //
+                           "{},"   //
+                           "{}\n"  //
+                           ,
+                           getTime(),                                                                  //
+                           sensors[0].h2o2, sensors[0].temp, sensors[0].humid, sensors[0].saturation,  //
+                           // sensors[1].h2o2, sensors[1].temp, sensors[1].humid, sensors[1].saturation,                                          //
+                           // sensors[2].h2o2, sensors[2].temp, sensors[2].humid, sensors[2].saturation,                                          //
+                           m_context.dvalue, m_context.m_nowLoglevel, m_context.m_targetLoglevel,                                              //
+                           ds->heatingStrip_getstate(), ds->airBlower_getstate(), ds->airCompressor_getstate(), ds->sprayLiquidPump_getGPM(),  //
+                           m_deviceIoControlService->getDisinfectantVolume_g(),                                                                //
+                           formattimeS(m_context.m_remaintime)));
 }
 
 void DisinfectionCtrlService::finishDisinfection(DisinfectionContext& context) {
@@ -299,10 +314,7 @@ void DisinfectionCtrlService::processDisinfectionState(DisinfectionContext& cont
   /**
    * @brief 周期性计算剩余时间
    */
-  if (zsteady_clock().elapsedTimeS(m_context.m_lastComputeDvalueTp) > DVALUE_COMPUTEPERIOD_TIME_S) {
-    m_context.m_lastComputeDvalueTp = zsteady_clock().now();
-    computeRemainTime(m_context);
-  }
+
   /**
    * @brief 根据湿度启停喷雾
    */
@@ -364,6 +376,11 @@ void DisinfectionCtrlService::disinfectionLoop(bool& breakflag) {
    */
   m_context.dvalue = getDisinfectionDValue(m_context.h2o2data.min_h2o2);
 
+  if (zsteady_clock().elapsedTimeS(m_context.m_lastComputeDvalueTp) > DVALUE_COMPUTEPERIOD_TIME_S) {
+    m_context.m_lastComputeDvalueTp = zsteady_clock().now();
+    computeRemainTime(m_context);
+  }
+
   if (m_context.m_state == kpreheat) {
     /**
      * @brief 预热中
@@ -376,8 +393,8 @@ void DisinfectionCtrlService::disinfectionLoop(bool& breakflag) {
     processDisinfectionState(m_context);
     //
     if (m_context.m_remaintime <= 0 && m_context.m_nowLoglevel > (m_context.m_targetLoglevel + 0.01)) {
-      m_context.m_remaintime = 0;
-      m_context.m_nowLoglevel   = m_context.m_targetLoglevel + 0.01;
+      m_context.m_remaintime  = 0;
+      m_context.m_nowLoglevel = m_context.m_targetLoglevel + 0.01;
       logger->info("disinfection finished {},but waitting for h2o2 to safe", m_context.m_disinfectionID);
       m_deviceIoControlService->sprayLiquidPump_close();
       usleep(1000 * 1000);