Index: dialin/hd/blood_leak.py
===================================================================
diff -u -r23701b1b99fa209da9d0f9f8a60c555d4a8277e6 -re406c6ede2c14c53f0dd3ab57739b805522d3a3a
--- dialin/hd/blood_leak.py	(.../blood_leak.py)	(revision 23701b1b99fa209da9d0f9f8a60c555d4a8277e6)
+++ dialin/hd/blood_leak.py	(.../blood_leak.py)	(revision e406c6ede2c14c53f0dd3ab57739b805522d3a3a)
@@ -96,7 +96,6 @@
         self.blood_leak_blood_detect = 0
         self.blood_leak_intensity_moving_average = 0.0
         self.blood_leak_time_elapsed_since_last_drift_zero_ms = 0
-        self.blood_leak_time_elapsed_since_last_upper_zero_ms = 0
 
         for cmd in EmbModeCommands.__members__:
             # Initialize all the embedded mode commands
@@ -161,8 +160,6 @@
             message['message'][MsgFieldPositions.START_POS_FIELD_7:MsgFieldPositions.END_POS_FIELD_7]))[0]
         self.blood_leak_time_elapsed_since_last_drift_zero_ms = struct.unpack('i', bytearray(
             message['message'][MsgFieldPositions.START_POS_FIELD_8:MsgFieldPositions.END_POS_FIELD_8]))[0]
-        self.blood_leak_time_elapsed_since_last_upper_zero_ms = struct.unpack('i', bytearray(
-            message['message'][MsgFieldPositions.START_POS_FIELD_9:MsgFieldPositions.END_POS_FIELD_9]))[0]
         self.hd_blood_leak_status_timestamp = timestamp
 
     def cmd_blood_leak_detector_override(self, detected: int, reset=NO_RESET):
@@ -413,25 +410,30 @@
             self.logger.debug("Timeout!!!!")
             return False
 
-    def cmd_blood_leak_zeroing_interval_in_minutes(self, value_mins: int, reset=NO_RESET):
+    def cmd_blood_leak_zeroing_interval_in_minutes(self, upper_interval: int, value_mins: int, reset=NO_RESET):
         """
         Constructs and sends the blood leak zeroing interval in minutes
         Constraints:
             Must be logged into HD.
 
+        @param upper_interval: unsigned int - to override upper range or drift intervals (0 = drift interval, 1 = upper interval)
         @param value_mins:  unsigned int - blood leak zeroing interval in minutes
         @param reset:  integer - 1 to reset a previous override, 0 to override
         @return: 1 if successful, zero otherwise
         """
         rst = integer_to_bytearray(reset)
         mins = integer_to_bytearray(value_mins)
-        payload = rst + mins
+        upper = integer_to_bytearray(upper_interval)
+        payload = rst + mins + upper
 
         message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_hd_ch_id,
                                               message_id=MsgIds.MSG_ID_HD_BLOOD_LEAK_ZEROING_INTERVAL_IN_MINS_OVERRIDE.value,
                                               payload=payload)
+        text = 'intensity drift'
+        if upper_interval == 1:
+            text = 'upper intensity'
 
-        self.logger.debug("Override blood leak zeroing interval to {} minute(s)".format(mins))
+        self.logger.debug("Override blood leak zeroing {} interval to {} minute(s)".format(text,mins))
 
         # Send message
         received_message = self.can_interface.send(message)