def __init__(self, instrument_type, line_term='\r\n'):
self.cmd_list = {'TEMP': (self.set_temperature, self.get_temperature),
'FIELD': (self.set_field, self.get_field),
'CHAMBER': (self.set_chamber, self.get_chamber),
'POS': (self.set_all, self.get_all)
'ALL': (self.set_all, self.get_all)}
self._instrument = QDInstrument(instrument_type)
self._line_term = line_term
