def check
      last_timestamp = ts_16_offset = nil
      last_ts_16 = nil

      # The timestamp_16 is a 2 byte time stamp value that is used instead of
      # the 4 byte timestamp field for monitoring records that have
      # current_activity_type_intensity values with an activity type of 6. The
      # value seems to be in seconds, but the 0 value reference does not seem
      # to be included in the file. However, it can be approximated using the
      # surrounding timestamp values.
      @monitorings.each do |record|
        if last_ts_16 && ts_16_offset && record.timestamp_16 &&
           record.timestamp_16 < last_ts_16
          # Detect timestamp_16 wrap-arounds. timestamp_16 is a 16 bit value.
          # In case of a wrap-around we adjust the ts_16_offset accordingly.
          ts_16_offset += 2 ** 16
        end
        if ts_16_offset
          # We have already found the offset. Adjust all timestamps according
          # to 'offset + timestamp_16'
          if record.timestamp_16
            record.timestamp = ts_16_offset + record.timestamp_16
            last_ts_16 = record.timestamp_16
          end
        else
          # We are still looking for the offset.
          if record.timestamp_16 && last_timestamp
            # We have a previous timestamp and found the first record with a
            # timestamp_16 value set. We assume that the timestamp of this
            # record is one minute after the previously found timestamp.
            # That's just a guess. Who knows what the Garmin engineers were
            # thinking here?
            ts_16_offset = last_timestamp + 60 - record.timestamp_16
            record.timestamp = ts_16_offset + record.timestamp_16
            last_ts_16 = record.timestamp_16
          else
            # Just save the timestamp of the current record.
            last_timestamp = record.timestamp
          end
        end
      end
    end
def check
      last_timestamp = ts_16_offset = nil
      last_ts_16 = nil

      # The timestamp_16 is a 2 byte time stamp value that is used instead of
      # the 4 byte timestamp field for monitoring records that have
      # current_activity_type_intensity values with an activity type of 6. The
      # value seems to be in seconds, but the 0 value reference does not seem
      # to be included in the file. However, it can be approximated using the
      # surrounding timestamp values.
      @monitorings.each do |record|
        if last_ts_16 && ts_16_offset && record.timestamp_16 &&
           record.timestamp_16 < last_ts_16
          # Detect timestamp_16 wrap-arounds. timestamp_16 is a 16 bit value.
          # In case of a wrap-around we adjust the ts_16_offset accordingly.
          ts_16_offset += 2 ** 16
        end
        if ts_16_offset
          # We have already found the offset. Adjust all timestamps according
          # to 'offset + timestamp_16'
          if record.timestamp_16
            record.timestamp = ts_16_offset + record.timestamp_16
            last_ts_16 = record.timestamp_16
          end
        else
          # We are still looking for the offset.
          if record.timestamp_16 && last_timestamp
            # We have a previous timestamp and found the first record with a
            # timestamp_16 value set. We assume that the timestamp of this
            # record is one minute after the previously found timestamp.
            # That's just a guess. Who knows what the Garmin engineers were
            # thinking here?
            ts_16_offset = last_timestamp + 60 - record.timestamp_16
            record.timestamp = ts_16_offset + record.timestamp_16
            last_ts_16 = record.timestamp_16
          else
            # Just save the timestamp of the current record.
            last_timestamp = record.timestamp
          end
        end
      end
    end
Create a new Monitoring_B object.
 @param field_values [Hash] A Hash that provides initial values for
        certain fields of the FitDataRecord.
 Perform some basic logical checks on the object and all references sub
 objects. Any errors will be reported via the Log object.