![]() ![]() ![]() This will ensure the most accurate reading within the capabilities of the instrument. The range selector switch of the light meter must be set to the lowest range possible (the one giving the highest reading). For instance, if an average of 480 lux was obtained in an office where the MINIMUM requirement is 500 lux, a 10% error allowance, or 48 lux, would be ADDED to the value of 480 lux, yielding a total of 528 lux, which is over the minimum acceptable value. To offset this potential error, 10% is added to results, where a maximum value is specified 10% is subtracted where a maximum value is specified. If you have any questions concerning the calibration of the instrument, please call the Manager of the Laboratory at 61) and the calibration sticker must be intact, showing that the calibration adjustment has not been tampered with.īecause the calibration procedure used by the laboratory is itself only accurate to plus or minus 5%, readings obtained with the instrument can be as much as 10% off. The instrument calibration must be verified annually by Labour Program's laboratory (the date of the last calibration is shown on the calibration sticker. This is a digital readout instrument which is accurate to plus or minus 5% according to its manufacturer. Procedure 5.1 InstrumentĪt this time, the instrument generally in use for lighting level measurement by the Labour Program is the Optikon Hagner EC1 luxmeter. How should lighting level measurements be made? 5. use the unit LUX for all lighting levels (10.76 lux = 1 foot-candle).include provisions dealing with lighting of airport aprons.include specific provisions for Video Display Terminal ( VDT) work stations.require the average lighting level to be computed using FOUR measurements.This will ensure a uniform approach and yield consistent results. This procedure should be used when measurements of lighting levels in work places are made by Labour Program personnel. This IPG will assist Health and Safety Officers in the application of Part VI of the Canada Occupational Health and Safety Regulations, "Lighting", published in the Canada Gazette, Part II, October 26, 1989.
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