TO 00-20-14 30 SEPTEMBER 2011 - Wright-Patterson Air Force Base

TO 00-20-14 30 September 20118.8.4 Measurement of Lighting. The average room illumination for general lighting shall be measured after 100 hours ofuse in the calibration and repair area at the level of the horizontal working surface of the PMEL bench and in theadministrative areas at desktop level. The surface shall be free of items and adjacent personnel during the measurementto minimize shadows on the light meter sensor. The illumination level can drop drastically during the initial burn-in time.Absolute Minimuma. Calibration/Repair/Dimensional 50 Foot Candle(FC)b. Cleaning 50 FCc. Office and Administrative 50 FCd. Technical Library 50 FCe. Training Room 50 FCf. Receiving, Issue 50 FCg. Bench Stock 20 FCh. AWM/AWP Holding 10 FCi. Stairways, Corridors, Airlock 20 FCj. Elevators, Shipping Dock 20 FC or *k. Restroom, Utility, Storage 10 FC or ** Not less than 1/5 of the brightest adjacent traffic area.8.8.5 Supplementary Lighting. Additional general lighting shall be used for tasks that are difficult to perform within theambient light level.8.8.6 Lighting Fixtures. Fluorescent lamps shall be used wherever possible to conserve energy. Relamping offluorescent luminaries shall be done using new fluorescent lamps of a white or daylight variety. They shall have an initialrated lumen output after 100 hours use of not less than 98% of the Illuminating Engineering Society rating for a coolwhite T-12 medium bipin lamp in the luminaire size lamp. Areas having special spectral emission requirements shall belamped accordingly.8.8.7 Energy Conservation. Lighting may be turned off during non-working hours providing:8.8.7.1 Due consideration is given to the effects on air conditioning reheat systems to ensure that energy is usedefficiently by turning off the lights.8.8.7.2 Environmental limits can be maintained with the lighting turned off.8.9 DOORS & WINDOWS.All windows and unused doors or other openings shall be sealed to prevent non-conditioned air infiltration and dustcontamination from outside. Doors opening into the PMEL shall be designed and arranged to maintain effective dust andtemperature controls. The doors for personnel passage shall be held to a minimum consistent with fire and safetyregulations. A building with no windows in the calibration and repair area of the building is preferred because of thepotential effect of the direct sunlight on measurement. There may be windows in the calibration and repair area as long asthey are not in outside walls of the building because direct sunlight in the PMELs could cause higher temperature in smallareas.8.10 AIR LOCKS.Air locks shall be constructed at the entrance to the calibration and repair area of the PMEL. An exception can be made ifthe PMEL is contained inside another environmentally controlled building and the PMEL calibration and repair area haspositive air pressure in relation to the outside environmentally controlled area. Shoe cleaners with a self-containedvacuum system (or external vacuum system) shall be located where they will be most effective in reducing contaminationthat might be carried into the calibration and repair area of the PMEL. Air locks and shoe cleaners are not required forType IV PMELs. Carpeting shall not be installed in air locks due to possibility of the carpeting interfering with theoperation of air lock doors.8-6