docs: def clear(self):
          """
          Clear the internal (private) variables of the class.
          """
          self.filename = ''
          self.filehandler = 0
          # Station name, identification and revision year:
          self.station_name = ''
          self.rec_dev_id = ''
          self.rev_year = 0000
          # Number and type of channels:
          self.TT = 0
          self.A = 0 # Number of analog channels.
          self.D = 0 # Number of digital channels.
          # Analog channel information:
          self.An = []
          self.Ach_id = []
          self.Aph = []
          self.Accbm = []
          self.uu = []
          self.a = []
          self.b = []
          self.skew = []
          self.min = []
          self.max = []
          self.primary = []
          self.secondary = []
          self.PS = []
          # Digital channel information:
          self.Dn = []
          self.Dch_id = []
          self.Dph = []
          self.Dccbm = []
          self.y = []
          # Line frequency:
          self.lf = 0
          # Sampling rate information:
          self.nrates = 0
          self.samp = []
          self.endsamp = []
          # Date/time stamps:
          #    defined by: [dd,mm,yyyy,hh,mm,ss.ssssss]
          self.start = [00,00,0000,00,00,0.0]
          self.trigger = [00,00,0000,00,00,0.0]
          # Data file type:
          self.ft = ''
          # Time stamp multiplication factor:
          self.timemult = 0.0
          
          self.DatFileContent = ''