Intech Auto TLD Badge Reader

  • Improved, smooth & noise-less mechanical transport design for trouble free service.
  • Linear actuators for raising card and for PMT shutter
  • Interchangeable magazines.
  • More efficient Hot gas heater design – fast heating & cooling
  • Fast magazine ejection with two speed drive for magazine movement
  • Environmentally safer temperature compensated blue LED light source
  • Peltier cooling for PMT for better stability of background
  • USB 2.0 serial interface

Improved, wider range I-F converter with better linearity from 0.1nA to 100µA to cover the range of  0-10Sv

 

SPECIFICATIONS

Dosimeter Badge : Three-element BARC CaSO4(Dy) PTFE disc dosimeter badge with machine readable 7 digit ID

Light Measurement System : Photomultiplier tube ( EMI 9125A – bialkali ) Light measuring system (LMS) with integrated HV and I-F Converter

Dark current : Dark current is 1 Sv (CaSO4) equivalent with improved software based sampling & subtraction

Heating Method : Hot gas (N2) heating

Heating Cycle : The temperature is raised to 280C in 8 sec and clamped at 280C

Dose Range                                                                        Detection Threshold

50 Sv – 10Sv (gamma)                                                    < 20 mSv.

100Sv – 10Sv (beta)

 

Readout time                                                            Residual signal

100 secs. per badge                                                < 10% of reading

Facilities Available

  • Entry of badge ID Nos, calibration factor, etc.
  • Storage of dose and glow curve data of badges.
  • Motorised driver assembly for automatic feeding of 50 dosimeter cards loaded in a magazine. Software
  • Windows Xp, Windows 7, compatible, menu driven software for transfer of data to a user defined file, storage & display of glow curves, computation of dose & generation of dose reports.

Temperature Monitoring

Chromel Alumel thermocouple in hot gas stream.

Range Selection

Automatic from 9.999mSv to 9.999Sv

Calibration

By adjustment of EHT through a potentiometer in the EHT circuit

Safeguards

Heater / Gas flow Failure: The heater and gas flow are checked for failure in every dosimeter readout cycle. In the event of failure of heater or gas flow the readout is terminated and a message indicating heater / gas flow failure is flashed on the PC monitor.

Mechanical failure: Any mechanical failure during readout cycle is sensed using a time-out watch dog programme and the cycle is terminated with an option for the user to restart the cycle.

EHT/ Input circuit failure: Failure of EHT or the input circuit (I-F converter) is sensed and reading cycle is terminated in case of failure.

Power

Power supply :230V, 50 Hz  : power requirements: 500 VA (max including PC)

PC requirements

Intel Core i3 – 2120 or upward compatible, with licensed Windows 7 OS with standard peripheral devices.

Operating System

windows 7 / 8