Index: dialin/common/msg_ids.py
===================================================================
diff -u -r965b384855cf17d6b975f9989f13a26248e2d919 -ra7512831552e0e4431ceface9d5d08483db10056
--- dialin/common/msg_ids.py	(.../msg_ids.py)	(revision 965b384855cf17d6b975f9989f13a26248e2d919)
+++ dialin/common/msg_ids.py	(.../msg_ids.py)	(revision a7512831552e0e4431ceface9d5d08483db10056)
@@ -303,6 +303,7 @@
     MSG_ID_HD_TREATMENT_DATA_PUBLISH_INTERVAL_OVERRIDE = 0x8074
     MSG_ID_HD_POST_TREATMENT_DATA_PUBLISH_INTERVAL_OVERRIDE = 0x8075
     MSG_ID_HD_BLOCK_MESSAGE_TRANSMISSION = 0x8076
+    MSG_ID_HD_SYRINGE_PUMP_FORCE_SENSOR_DAC_CALIBRATE = 0x8077
 
     MSG_ID_DG_TESTER_LOGIN_REQUEST = 0XA000
     MSG_ID_DG_ALARM_STATE_OVERRIDE = 0XA001
Index: dialin/hd/syringe_pump.py
===================================================================
diff -u -r076965b54ec7f9711537ad5553de65b4da11338e -ra7512831552e0e4431ceface9d5d08483db10056
--- dialin/hd/syringe_pump.py	(.../syringe_pump.py)	(revision 076965b54ec7f9711537ad5553de65b4da11338e)
+++ dialin/hd/syringe_pump.py	(.../syringe_pump.py)	(revision a7512831552e0e4431ceface9d5d08483db10056)
@@ -713,3 +713,35 @@
             self.logger.debug("Timeout!!!!")
             return False
 
+    def cmd_set_syringe_pump_dac_ref_voltage(self, dac_v_ref: float = 0.15) -> int:
+        """
+        Constructs and sends the set syringe pump DAC pressure sensor reference voltag command
+        Constraints:
+            Must be logged into HD.
+
+        @param dac_v_ref:  float - status (0.0..3.3)
+        @return: 1 if successful, zero otherwise
+        """
+
+        payload = float_to_bytearray(dac_v_ref)
+
+        message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_hd_ch_id,
+                                              message_id=MsgIds.MSG_ID_HD_SYRINGE_PUMP_FORCE_SENSOR_DAC_CALIBRATE.value,
+                                              payload=payload)
+
+        self.logger.debug("set HD syringe pump DAC reference voltage")
+
+        # Send message
+        received_message = self.can_interface.send(message)
+
+        # If there is content...
+        if received_message is not None:
+            str_res = str(dac_v_ref)
+            self.logger.debug("Syringe pump DAC reference voltage set to " + str_res + "V.  " +
+                              str(received_message['message'][DenaliMessage.PAYLOAD_START_INDEX]))
+            # response payload is OK or not OK
+            return received_message['message'][DenaliMessage.PAYLOAD_START_INDEX]
+        else:
+            self.logger.debug("Timeout!!!!")
+            return False
+