Index: dialin/dg/calibration_record.py
===================================================================
diff -u -r72335b185c277c008b114da7ad97bdc2978b3d76 -rc96c0b63250155c3bc1610cf9dab60cc56106df1
--- dialin/dg/calibration_record.py	(.../calibration_record.py)	(revision 72335b185c277c008b114da7ad97bdc2978b3d76)
+++ dialin/dg/calibration_record.py	(.../calibration_record.py)	(revision c96c0b63250155c3bc1610cf9dab60cc56106df1)
@@ -1,6 +1,5 @@
 
 import struct
-import datetime
 import time
 from collections import OrderedDict
 from ..common.msg_defs import MsgIds, MsgFieldPositions
@@ -52,6 +51,7 @@
         self.cal_data = 0
         self._raw_cal_record = []
         self._write_fw_data_to_excel = True
+        self._is_getting_cal_in_progress = False
         self._utilities = NVOpsUtils()
         # DG calibration_record main record
         self.dg_calibration_record = OrderedDict()
@@ -82,11 +82,15 @@
 
         @return: None
         """
-        # Clear the list for the next call
-        self._raw_cal_record.clear()
-        # Run the firmware commands to get the calibration_record record
-        self._request_dg_fw_calibration_record()
 
+        # If getting the calibration is in progress, do not start another process
+        if self._is_getting_cal_in_progress is not True:
+            self._is_getting_cal_in_progress = True
+            # Clear the list for the next call
+            self._raw_cal_record.clear()
+            # Run the firmware commands to get the calibration_record record
+            self._request_dg_fw_calibration_record()
+
     def _request_dg_fw_calibration_record(self):
         """
         Handles getting DG calibration_record record from firmware.
@@ -142,6 +146,8 @@
             self._raw_cal_record += (message['message'][self._RECORD_START_INDEX +
                                                         self._RECORD_SPECS_BYTES:end_of_data_index])
             if self.current_message == self.total_messages:
+                # Done with getting all the calibration data.
+                self._is_getting_cal_in_progress = False
                 # If all the messages have been received, call another function to process the raw data
                 self._utilities.process_received_record_from_fw(self.dg_calibration_record, self._raw_cal_record,
                                                                 write_to_excel=self._write_fw_data_to_excel)