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Instruction Manual
CD
lux
Digital Luminance/
Illuminance Meter
Page 1: ...p e h a m e d Instruction Manual CD lux Digital Luminance Illuminance Meter ...
Page 2: ...evice CD LUX Luminance Illuminance Meter Edition Date May 2016 How to reach us pehamed pehamed pehamed pehamed PEHA Med Geräte GmbH Mühlstrasse 38 D 65843 Sulzbach Ts Germany Tel 49 6196 500 40 30 Fax 49 6196 500 40 50 E mail info pehamed de ...
Page 3: ...mum Contrast 17 Luminance Variations within One Image 19 Measuring Luminance Variations 20 Measuring Uniformity of Viewing Box Luminance 22 Measuring Viewing Box Luminance 24 Retrieving Stored Measurement Values 26 Examples 27 Measuring Ambient light in Lux 29 Menu 30 LCD Display 33 Switching off 34 Battery Change 35 USB Interface 36 Sensors 37 Luminance Detector 38 Illuminance Detector 40 Technic...
Page 4: ...ified Quality Management System ensures that our products assuming they are properly used will have an optimum useful service life As with all high value products it is essential for trouble free operation that the operating instructions contained in this manual are carefully followed IMPORTANT The basic CD LUX unit and its sensors have been precisely adjusted to each other under reference conditi...
Page 5: ...5 Device Description LUX SENSOR INTERFACE SOCKET cd m SENSOR INTERFACE SOCKET ON OFF ZERO ENTER OK MEMORY RESET BATTERY BOX MENU SAVE RESULT UP DOWN USB INTERFACE ...
Page 6: ... for ca 5 seconds to delete the measurement values in the memory MENU SAVE RESULT button Press and hold down this button for ca 2 sec to open the Set up menu Briefly press this button to save selected menu items Press this button for 5 sec until Calculate appears in the LCD to retrieve stored values UP arrow button To select a menu item briefly press this button DOWN arrow button To select a menu ...
Page 7: ...e permissible laser performance of a continuous laser beam of this class is limited to a maximum of 1 milliwatt 1 mw Adequate eye protection is ensured by the lid closing reflex As a result eye injury is only possible if a person deliberately looks into the laser beam for several seconds while suppressing the lid closing reflex DO NOT LOOK DIRECTLY INTO THE LASER ...
Page 8: ... surface are not suitable for the evaluation of existing viewing conditions as they do not measure the contrast reducing reflected ambient light Thanks to its spacer leg the CD LUX is able to include reflected ambient light in its measurements The built in laser positioning aid of the CD LUX enables its precise alignment over the desired measurement point on the monitor surface as the laser beam i...
Page 9: ...case 1 Snap the sensors into the sensor interface sockets and loosely tighten the knurled fitting IMPORTANT The CD LUX must be switched off at this time otherwise the sensor will not be detected by the unit s software 2 Now switch on the unit by pressing the ON OFF ZERO button Then a self test will run for a few seconds during which the sensor will be detected Example Then a hard and software self...
Page 10: ...s upon the sensor type connected Example Following completion of the above display sequence the CD LUX is ready for use The display now shows 0 000 for all measurement values Lx Cd m 0 00 0 000 Ref 0 000 CDMO t CDMO Sensor erkannt CDMO 1 054 as ...
Page 11: ... range of ca 0 05 cd m to 80 000 cd m and automatically switches the measurement range to kcd m as needed Up to a measured luminance value of 10 000 cd m the direct value is shown e g 4 500 68 cd m For values 10 000 cd m a small k kilo appears in front of the cd m e g 56 690 kcd m 56 690 cd m ...
Page 12: ...test press the MENU button until an acoustical signal is heard Set the Zero enable on menu item by pressing the ENTER button and exit the menu by pressing the MENU button again Close the black cylindrical housing of the optical measurement system of the hand held detector with the enclosed cap Perform a measurement by pressing and releasing the ON START button on the hand held detector Press the O...
Page 13: ...surements automatically begin Align the blinking red laser point of the hand held detector over the desired measurement point on the monitor or viewing box while keeping the spacer leg of the detector in direct contact with the display device surface as closely as possible in a perpendicular 90 angle Hold the detector steady during the measurement cycle A blinking asterisk will appear above the re...
Page 14: ...the blinking red laser point of the hand held detector over the desired measurement point on the monitor or viewing box while keeping the spacer leg of the detector in direct contact with the display device surface as closely as possible in a perpendicular 90 angle Release the ON START button to start the measurement Hold the detector steady during the measurement cycle A blinking asterisk will ap...
Page 15: ...f the Maximum Contrast of the image display device and the measured Veiling Luminance must be 100 for Class 1 devices than 40 for Class 2 devices The following table contains typical maximum white luminance values and the corresponding maximum permissible veiling luminance values Max White Luminance cd m2 Veiling Luminance of Switched off Display Device cd m2 100 1 0 300 3 0 Performance Class 1 50...
Page 16: ...the switched off monitor while bringing the spacer leg into direct contact with the monitor surface in a perpendicular angle Release the ON START button to start the measurement Hold the detector steady during the measurement cycle A blinking asterisk will appear above the respective measurement value during the measurement cycle The measurement cycle takes ca 2 seconds and the veiling luminance m...
Page 17: ...ng Luminance Note The Minimum Luminance Gray Value is Veiling Luminance as the Minimum Luminance is made up of the Veiling Luminance and the Minimum Luminance of the image display device Measuring Maximum Contrast Switch on the CD LUX by pressing the ON OFF ZERO button 0 0 0 0 appears in the display Press and hold down the ON START button on the hand held detector which activates the laser Continu...
Page 18: ...le takes ca 2 seconds and the measurement value for the Minimum Luminance Lmin in cd m remains on display until the next measurement is started as described above or the unit is switched off only in Trigger Mode Note the measurement value for Lmin Repeat the above measurement procedure for the Maximum Luminance Lmax and note its measurement value Calculate the ratio Lmax Lmin ...
Page 19: ...area of uniform density with a gray value corresponding to 50 of the maximum signal level The measurement points must not be overlapped by other information or structures step wedge bar pattern grid etc The following table lists the limits for permissible variations in luminance of the corner measurement points vs the luminance of the central measurement point M1 by performance class of the image ...
Page 20: ...hile bringing the spacer leg into direct contact with the monitor surface in a perpendicular angle Release the ON START button to start the measurement Hold the detector steady during the measurement cycle A blinking asterisk will appear above the respective measurement value during the measurement cycle The measurement cycle takes ca 2 seconds and the luminance measurement value for M1 in cd m re...
Page 21: ...e measurement values from the memory please see the instructions on page 27 To delete the measurement values stored in the memory press the RESET button for ca 5 seconds after you have exited the display of memory values by pressing the MENU button The word Reset will briefly appear in the display ...
Page 22: ...arting with measurements Mark the points that need to be measured Use a template if needed Use the following measurement points for a viewing box with a maximum viewing area of 35x43 cm or 40x40 cm ME M 8 cm ME 1 ME 3 ME 4 8 cm ME M must be in the exact center of the viewing area and all other measurement points must be 8 0 cm from each edge of the viewing field ...
Page 23: ...surement points ME 1 ME 2 ME 3 and ME 4 8 0 cm from each edge of the viewing surface To determine the position of the points ME 5 ME 6 ME 7 and ME 8 first determine the overall length and height of the viewing area These remaining four measurement points must be located 1 4 of the total of each of these dimensions from each of the viewing area edges but not less than 10 0 cm from the viewing area ...
Page 24: ... start the measurement Hold the detector steady during the measurement cycle A blinking asterisk will appear above the respective measurement value during the measurement cycle The measurement cycle takes ca 2 seconds and the luminance measurement value for ME M in cd m remains on display until the next measurement is started as described above or the unit is switched off only in Trigger Mode The ...
Page 25: ...25 Repeat this process for ME 1 ME 2 ME 3 and ME 4 Save each of these measurements values as shown above For larger viewing boxes repeat this process for ME 5 ME 6 ME 7 and ME 8 ...
Page 26: ...e reference point value are displayed Example By pressing the UP or DOWN buttons you can scroll through the values To exit this menu briefly press the MENU button To delete the measurement values stored in the memory press the RESET button for ca 5 seconds after you have exited the display of memory values by pressing the MENU button The word Reset will briefly appear in the display Reference 2811...
Page 27: ...the LCD 74 7 If ME 4 2 573 cd m the LCD 83 4 B At minimum brightness setting Assume that ME M has a value of 1 212 cd m If ME 1 911 cd m the LCD will display 75 2 If ME 2 891 cd m the LCD 73 6 If ME 3 881 cd m the LCD 72 7 If ME 4 901 cd m the LCD 74 4 Each measurement value is displayed in the LCD after a digit e g 1 for measurement point 1 followed by the percentage value of that measurement poi...
Page 28: ...2 984 cd m the LCD will display 88 2 If ME 6 3 244 cd m the LCD 95 9 If ME 7 3 244 cd m the LCD 95 9 If ME 8 3 064 cd m the LCD 90 5 B At minimum brightness setting Tolerance Limit 30 Assume that ME M has a value of 1 342 cd m If ME 1 821 cd m the LCD will display 61 2 If ME 2 1 011 cd m the LCD 75 4 If ME 3 1 011 cd m the LCD 75 4 If ME 4 841 cd m the LCD 62 7 Tolerance Limit 15 If ME 5 1 122 cd ...
Page 29: ...ve the ME M central measurement point of the viewing box with the illuminance detector facing away from the viewing box towards the room Start the lux measurement by pressing and releasing the ON START button on the rear side of the hand held detector A blinking asterisk will appear above the measurement value during the ca 2 second measurement cycle Read and note the measured illuminance value in...
Page 30: ...e self test has run open the menu by pressing and holding down the MENU button for ca 2 seconds until an acoustical signal is heard You can scroll through the menu by briefly pressing the UP and DOWN buttons An arrow symbol indicates your current position within the menu To select a particular menu item briefly press the ENTER OK MEMORY RESET button As a confirmation a checkmark will appear next t...
Page 31: ... the Menu by pressing the ON OFF ZERO button See the Chapter Zeroing After zeroing the unit automatically switches back to Zero enable off ATTENTION Only perform a zero adjustment with the protective cap on the black cylindrical housing of the optical measurement system 2 Measure cont Measure trig Explanation Use to switch from Trigger Mode to Continuous Mode measurement methods Cont Continuous Mo...
Page 32: ...h off the unit when you have completed your work to save battery power 4 USB Com on USB Com off Explanation The data output mode of the USB interface located on the bottom of the unit can be switched on or off On is factory preset 5 LXSE Sensor on LXSE Sensor off Explanation With this function the sensor for illuminance measurements in lux can be switched on or off On is factory preset 6 CDMO Sens...
Page 33: ... the self test the following display appears Lx Cd m 0 00 0 000 Ref 0 000 CDMO t Illuminance measurement value in lux Luminance measurement value in cd m Value to be stored Display of the sensor type detected by the software Measurement mode t trigger c continuous ...
Page 34: ...tself off after a period of inactivity of ca 5 minutes This function can be disabled for continuous operation by setting PWR off disable in the adjustment settings menu You can also manually switch off the unit by pressing the ON OFF ZERO button for ca 5 seconds ...
Page 35: ...ttom of the unit To do so simultaneously depress the spring loaded buttons located on the right and left sides of the cover You can now remove the yellow cover plate by pulling it downward and take out the battery Disconnect the battery from the battery clip and clip on the new battery Use only a 9V alkaline type Reposition the cover plate and snap it on ...
Page 36: ...36 Serial Interface The CD LUX is equipped with an USB interface for data output Please note that you can only use the dedicated data transfer cable which is available as optional equipment ...
Page 37: ... the plug connector IMPORTANT Each of the sensors delivered with the CD LUX has been precisely adjusted for use and factory calibrated with that particular CD LUX basic unit Use of a sensor which has not been calibrated for use with your basic unit can produce incorrect measurement values You can upgrade your unit with a different pehamed sensor but it must be calibrated by pehamed with your CD LU...
Page 38: ...ng sensor interface socket IMPORTANT Always connect the luminance detector with the CD LUX basic unit switched off otherwise it will not be detected by the software An optical measurement system within a black cylindrical housing is screwed into the hand held detector It provides for precise measurement of the value of the measurement point LASER CONTROL WINDOW SPACER LEG LASER POSITIONING AID OPT...
Page 39: ...ctivated by pressing and holding down the ON START button on the rear side of the hand held detector Position the blinking red laser point over the desired measurement point The measurement begins once the laser has been deactivated by releasing the ON START button The laser control window marked Laser Control on the rear side of the hand held detector is used to ensure the proper nearly perpendic...
Page 40: ...ace socket IMPORTANT Always connect the illuminance detector with the CD LUX basic unit switched off otherwise it will not be detected by the software The illuminance detector measures the ambient light in lux In Continuous Mode new measurements are automatically continuously made ca every 2 seconds In Trigger Mode each measurement must be started by pressing and releasing the ON START button on t...
Page 41: ...m monitor surface ca 13 cm Measurement Field Diameter ca 1 cm Storage Temperature 10 C to 60 C Operating Temperature 15 C to 35 C Relative Humidity 80 Power Supply 9 V alkaline battery for ca 8 hrs of operation PC Interface USB 2 0 interface for data output of measurement values and raw data for further PC supported data analysis and administration Dimensions and Weight 165 mm x 95 mm x 30 mm HxWx...
Page 42: ...f electrolyte comes into contact with the eyes immediately see a doctor Ensure batteries are inserted with the correct pole orientation and are marked on the batteries Switch off the CD LUX when not in use to save battery power Do not charge heat burn short circuit or mechanically damage batteries Danger of fire explosion or burn wounds if batteries are improperly handled Suitable fire extinguishi...
