Crosslinking DR 020 Operating Manual Download | Manualshive

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Page 12 of 14

11.2 Service mode 2

If the keys T1 and T2 are pressed at the same time during start-up, the device is switched to
service mode 2. This mode displays important data to simplify diagnostics.
The instrument-specific calibration factor (App.fact) which compensates for the hardware of
different devices can also be set in this mode. Do not change the instrument-specific calibration
factor! Adaptations regarding different dosimeter film batches can be made by modifying the
film-specific calibration factor (foil fact).

Flow chart / menu structure

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Summary of Contents for DR 020

Page 1: ...0 281 SE 302 44 Halmstad Telefax DE 72147 Nehren Telefax 46 0 35 14 82 06 49 0 7473 920 282 EB_DOS_01_Manual_EN_01 doc Page 1 of 14 Operating manual for dosimeter type DR020 1 Purpose of the device 2 Design 3 Connection 4 Operation 5 Calibration 6 Application 7 Method of measurement 8 Principle of measurement 9 Measuring film 10 Measured values via the interface 11 Malfunctions servicing 12 Techni...

Page 2: ...n or use of this document is not permitted without express written authority Electron Crosslinking AB shall have no liability for any indirect or speculative damages arising from the use of this product Technical data subject to change Other product and corporate names may be trademarks of other companies and are only for explanation and to the owner s benefit without intent to infringe ...

Page 3: ...coloration This very thin film approx 20 µm or 20 g m2 has good resolution in depth doses for measurements with low energy electrons As the film is supplied by the meter it is also possible to measure the dose distribution across the effective width at high resolution as follows Radiation is directed onto a strip which corresponds to the beam width and evaluation then performed at cm intervals for...

Page 4: ...t you should switch on the device 30 min before use and then recalibrate it after the half hour In this way accurate measurements are achieved Once calibration is complete the device is ready to perform measurements When a radiated film see item 10 is inserted a dose reading immediately appears on the display A constant measured mean value is displayed after 8 to 32 measurements Constant values ar...

Page 5: ...roceed to the next menu 4 2 1 T2 Print memory See section 10 Measured values via the interface 4 2 3 T3 Ready The T3 key is used to return to menu 1 4 3 Menu 3 Clear memory 4 3 1 T1 Next The T1 key is used to proceed to the next menu 4 3 2 T2 Clear memory The T2 key is used to erase all data from the memory Subsequently the message memory is empty is displayed and you are returned to menu 1 4 3 3 ...

Page 6: ...e above 500 If this value is not reached the device needs to be readjusted 4 6 3 T3 Ready The T3 key is used to return to menu 1 5 Calibration After starting the device is calibrated After prolonged operation recalibration of the device is recommended to compensate for any thermal drifts of the optical components for example thereby ensuring accuracy of the dose evaluation 5 1 Measurements with a ...

Page 7: ...on This method compensates for variations in the thickness 2 3 µm of the dosimeter measuring film and yields improved resolution A resolution of 10 g m2 is achieved with a correspondingly accurate dose at the end of the stack via the measuring film of 20 g m2 At 20 g m2 dose loss is minimal thus reducing the incidence of measurement errors Typical depth dose with a resolution of 20 g m2 6 2 Measur...

Page 8: ...he other color is reset until both of the measured intensities are roughly equivalent These intensities are stored in the memory as the values Ig0 and Ir0 By comparing the difference between the intensities scattered light are suppressed The measured values are evened out by software components and a mean value calculated using 8 of the evened values A measurement period of 3 times 20ms is require...

Page 9: ...ng of the dosimeter film Please note that the dosimeter film must always lie on top when measuring doses with low energy electrons The dosimeter film should be evaluated without the supporting film If you wish to perform evaluation using supporting film the dosimeter must first be calibrated with the supporting film and without the dosimeter film The maximum operating temperature must be taken int...

Page 10: ...using COM 1 or COM 2 Carry out the following steps to print the data Start the Windows program HyperTerminal From the File menu select New Connection and confirm your selection Enter the name of the file into the New Connection window e g MeasuredValues01 and confirm the name In the File name window e g MeasuredValues01 select Connect Using choose Direct to COM 1 or COM 2 or your interface and con...

Page 11: ...modes for error detection and servicing Service mode 1 automatic activation Service mode 2 manual activation Service mode 3 automatic activation 11 1 Service mode 1 If the device can no longer calibrate Error T2 service program is displayed This function can be forced by placing a piece of paper into the measuring head during calibration In this mode red on 500 off 0 green on 500 can be controlled...

Page 12: ...ata to simplify diagnostics The instrument specific calibration factor App fact which compensates for the hardware of different devices can also be set in this mode Do not change the instrument specific calibration factor Adaptations regarding different dosimeter film batches can be made by modifying the film specific calibration factor foil fact Flow chart menu structure ...

Page 13: ... fact instrument specific calibration factor T2 calls up the menu which can be used to set the instrument specific calibration factor Any factor between 0 255 can be set This allows differences in components to be compensated for thereby ensuring identical dose readings for different devices This factor is retained when exiting with T3 and is not to be modified The device must be calibrated see se...

Page 14: ...er supply socket center contact housing Current 370 mA Keyboard 3 mechanical keys covered with a keyboard overlay Display Dot matrix display 20 characters 2 lines Optical transmitter Transmitter diode wavelength red 635 nm green 565 nm Optical receiver Receiver diode wavelength 500 700 nm Interface Serial interface Data output via 0 modem cable Electronics Check card sized processor with A D conve...

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