Irradian L202PMS User Handbook Manual Download | Manualshive

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Handbook Ref No. MH100/Issue M

File Ref: L202vm.doc

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Summary of Contents for L202PMS

Page 1: ...Handbook Ref No MH100 Issue M File Ref L202vm doc ...

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Page 3: ... 2 Specification 3 Cosine Angular Response 4 Operation 5 Maintenance and Calibration Description 6 Battery Replacement 7 Block Diagram 8 Programming via the RS232 interface 9 Environmental care recycling and disposal ...

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Page 5: ...ry The anodised aluminium body houses the large area silicon photodiode detector amplifier and specially selected colour filter glasses that adjust the detectors response to closely match the CIE v λ photopic response A profiled diffuser ring gives the detector an accurate cosine corrected angular response for illuminance measurements The luminance probe interchanges with the cosine diffuser ring ...

Page 6: ...mable delay factory setting 60 seconds HOLD RUN Display is held at present reading until hold button is pressed again Power on off button ZERO Initiates a zero or background measurement routine on all three ranges STORE Store the current reading holding up to maximum of sixteen values RECALL Display previously stored values STORE On detector See front panel store button Connectors 8 pin mini DIN t...

Page 7: ...ature coefficient 0 10 C Temperature range Operation 25 to 75 C Storage 45 to 100 C Detector assembly Black anodised aluminium alloy housing The detector is connected to the display unit via a cable to a 8 pin mini DIN connector Spectral response Refer Figure 1 Coloured filter glasses adjust the detectors response to closely match the CIE v λ photopic response SPECTRAL RESPONSE Figure 1 L202PMS Ph...

Page 8: ...urately cosine corrected to Lamberts Cosine Law Maximum error is less than 3 5 from true response to 75 from normal incidence reference figure 2 Screw thread 1 1 8 x 20TPI LUMINANCE PROBE Design Aluminium tube 10mm φ internal diameter with aperture Rubber O ring tip Screw thread 1 1 8 x 20TPI ...

Page 9: ...incident on the detector Lambert s Cosine Law To ensure that the integration of light from all angles is correct the cosine diffuser fitted to the front of the filter ring is profiled such that the angular response of the detector decreases with cos i as the angle between the source and detector increases from 0 to 90 L202PMS True Cosine Response Figure 2 The cosine diffuser fitted to the detector...

Page 10: ...the illuminance values LUMINANCE MEASUREMENTS Remove the cosine diffuser ring and screw the luminance probe onto the detector assembly If required slide a shadow ring onto the end of the probe The cd m LED must be illuminated When measuring screen luminance gently place the probe onto the CRT or LCD with the rubber O ring uniformly touching the screen The shadow ring can be moved to touch the scre...

Page 11: ...e the units either lux or cd m To recall previous values press and release the recall key The display will decrement through each location in turn There are two options for storing a measurement value pressing the store key on the photometer or pressing the store key on the base of the detector The memory locations are incremented after each store command Note that if you recall a previous value i...

Page 12: ...gsten halogen lamps and silicon photodiodes which are routinely calibrated by the National Physics Laboratory in the UK During manufacture the photopic filter is scanned with the filter glasses selected for the best match to the CIE photopic response The meter is calibrated for illuminance at 100 00 0 10 lux using a lamp of colour temperature 2856K 50K and for luminance at 100 0 0 3 cd m 2 using a...

Page 13: ...an 1 Switch off the photometer before changing the battery 2 Slide open the battery compartment on the back of the photometer and pull out the battery Disconnect from the battery clip 3 Replace with a size PP3 9 volt battery 4 Place battery inside compartment and slide cover closed 5 Note it will be necessary to switch on and off the photometer before normal operation will commence ...

Page 14: ...Limited L202PMS Photometer 10 Diffuser Filter Detector Amp Gain Control v to f Counter µController Keypad Liquid Crystal Display Display Driver RS232 Driver LEDs Detector Amplifier Micro Controlled Display Unit ...

Page 15: ...ht meter B Toggles backlight x Sets detector amplifier to maximum gain range 199 99 y Sets detector amplifier to middle gain range 1999 9 z Sets detector amplifier to minimum gain range 19999 R Resets amplifier to autogain s Sends data continuously via the RS232 o Sends one set of data via the RS232 V Uploads signal data stored in memory ...

Page 16: ...d R capital R 8 Type o for one packet of data and s for continuous data Type s to stop the data flow 9 To save the terminal setup go to File Save As and save the settings When restarting the programme the settings can be reloaded with File Load filename Now actions 4 and 5 can be omitted Logging data continuously to a file using Microsoft TERMINAL EXE 1 Run the Terminal programme with the correct ...

Page 17: ...ect via the File Properties option to display the properties window 8 Select the Settings tab and select Auto detect for the Emulation setting 9 Click the ASCII Setup button Enter 100 into the box marked Line delay No other options are necessary Click on OK to return to the main window 10 Check the RS232 link by downloading a reading using the command o lowercase o This also allows auto detect to ...

Page 18: ...ter 3 Go to Transfer Capture Text Enter the filename for the stored data and the location to save to e g C HyperTerminal Capture txt 4 Press the start button to store all the readings transmitted from the photometer in a file Capture txt The status bar will now show a highlighted Capture message The file is saved to the computer by selecting Transfer Capture Text Stop 5 Send the command s again vi...

Page 19: ...which can be recycled and reused Please remember to observe the local regulations that govern both the disposal of the packaging materials accompanying this product and any used batteries DO NOT DISPOSE OF THIS PRODUCT IN YOUR GENERAL WASTE BIN Please inform yourself about your local WEEE collection system which is available for electrical and electronic products that are marked with the symbol sh...

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Page 24: ... 9 Elphinstone Road Telephone 44 0 1875 898 083 Tranent Facsimile 44 0 1875 616 528 East Lothian E mail info irradian co uk Scotland EH33 2LG Web www irradian co uk ...

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