Index: dialin/common/msg_ids.py
===================================================================
diff -u -r4dfa4d2eae8484e5079aa4ca7eff93ffe0c0abf0 -r866ecd5e5986d13f05c0187afa7061ee80845767
--- dialin/common/msg_ids.py	(.../msg_ids.py)	(revision 4dfa4d2eae8484e5079aa4ca7eff93ffe0c0abf0)
+++ dialin/common/msg_ids.py	(.../msg_ids.py)	(revision 866ecd5e5986d13f05c0187afa7061ee80845767)
@@ -502,6 +502,7 @@
     MSG_ID_DG_RESERVOIR_BROADCAST_INTERVAL_OVERRIDE = 0xA074
     MSG_ID_DG_STATE_TIMER_77C_OVERRIDE = 0xA075
     MSG_ID_DG_STATE_TIMER_82C_OVERRIDE = 0xA076
+    MSG_ID_DG_CHEM_DISINFECT_ACID_OVERRIDE = 0xA077
 
     MSG_ID_HD_DEBUG_EVENT = 0xFFF1
     MSG_ID_DG_DEBUG_EVENT = 0xFFF2
Index: dialin/dg/chemical_disinfect.py
===================================================================
diff -u -ra476acd4f668b4e591f4f0296f09df6745e9ae8f -r866ecd5e5986d13f05c0187afa7061ee80845767
--- dialin/dg/chemical_disinfect.py	(.../chemical_disinfect.py)	(revision a476acd4f668b4e591f4f0296f09df6745e9ae8f)
+++ dialin/dg/chemical_disinfect.py	(.../chemical_disinfect.py)	(revision 866ecd5e5986d13f05c0187afa7061ee80845767)
@@ -20,6 +20,7 @@
 from ..protocols.CAN import DenaliChannels, DenaliMessage
 from ..utils.base import AbstractSubSystem, publish, DialinEnum
 from ..utils.conversions import *
+from .constants import RESET, NO_RESET
 
 @unique
 class ChemCancellationModes(DialinEnum):
@@ -194,3 +195,34 @@
         @return: (int)
         """
         return self.r2_level
+
+    def cmd_acid_moving_average_override(self, conductivity: float, reset: int = NO_RESET) -> int:
+        """
+        Constructs and sends the chem disinfect acid moving average override command
+
+        @param conductivity:  float - conductivity value to override sensor with
+        @param reset:  integer - 1 to reset a previous override, 0 to override
+        @return: 1 if successful, zero otherwise
+
+        """
+
+        reset_byte_array = integer_to_bytearray(reset)
+        cond_byte_array = float_to_bytearray(conductivity)
+        payload = reset_byte_array + cond_byte_array
+
+        message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_dg_ch_id,
+                                              message_id=MsgIds.MSG_ID_DG_CHEM_DISINFECT_ACID_OVERRIDE.value,
+                                              payload=payload)
+
+        self.logger.debug("override CD2 average value for sensor to" + str(conductivity))
+
+        # Send message
+        received_message = self.can_interface.send(message)
+
+        # If there is content...
+        if received_message is not None:
+            # response payload is OK or not OK
+            return received_message['message'][DenaliMessage.PAYLOAD_START_INDEX]
+        else:
+            self.logger.error("Timeout!!!!")
+            return False
\ No newline at end of file