[en] The dosimetry laboratory of NRCN employs a 2271 Harshaw automatic TLD card reader. The system logic performs only basic parity checks of the data which is sent to the peripheral equipment, besides the upper and lower dose limit alarms. Other errors may remain undetected until the data analysis stage. A pc computer was connected to the automatic card reader system. The pc computer controls the operation of the system while receiving, checking and recording the data on a magnetic media. A serial number is given to each record and other specifications as date, unit and type of analysis are also added to the data file. (author)