def init_process(self):
        """
        init a standard daq process for multiple devices
        """

        for item in Device.objects.filter(protocol__daq_daemon=1, active=1, id__in=self.device_ids):
            try:
                tmp_device = item.get_device_instance()
                if tmp_device is not None:
                    self.devices[item.pk] = tmp_device
                    self.dt_set = min(self.dt_set, item.polling_interval)
                    self.dt_query_data = min(self.dt_query_data, item.polling_interval)
            except:
                var = traceback.format_exc()
                logger.error("exception while initialisation of DAQ Process for Device %d %s %s" % (
                    item.pk, linesep, var))

        return True
init a standard daq process for multiple devices