OMEGA HHLM-2 Digital Lightmeter
omega.com TM OMEGAnetSM On-Line Service http://www.omega.com Servicing North America: USA: ISO 9001 Certified Canada: One Omega Drive, Box 4047 976 Bergar Stamford, CT 06907-0047 Laval (Quebec) H7L5A1 Tel: (203) 359-1660 Tel: (514) 856-6928 FAX: (203)359-7700 FAX: (514) 856-6886 e-mail: info@omega.com e-mail: info@omega.com Internet e-mail info@omega.
INTRODUCTION This instrument is a portable easy use 3½ digit, compact-sized digital lightmeter designed for simple one hand operation. Provides selected the lux and fc units. Meter with Backlit LCD display, PEAK-HOLD (50mS pulse light) and DATA-HOLD feature. SAFETY INFORMATION It is recommended that you read the safety and operation instructions before using the lightmeter. WARNING • To avoid electric shock, do not operate this product in wet or damp conditions.
The symbol on the instrument indicates that the operator must refer to an explanation in this manual. SPECIFICATIONS GENERAL Display: 3½ digit liquid crystal display (LCD) with maximum reading of 1999. Overrange: (OL) is displayed. Low battery indication: the " " is displayed when the battery voltage drops below the operating level. Measurement rate: 2.5 times per second, nominal. Operating Environment: 0°C to 50°C (32°F to 122°F) at < 70% relative humidity.
ELECTRICAL Photometric Formulas: 10.764·footcandles=lux (lumens/meter2) 0.0929·lux=footcandles(lumens/foot2) Range: 20lux,200lux,2000lux,20000lux,20fc,200fc,2000fc,20000fc Resolution: 0.01lux,0.
OPERATING INSTRUCTIONS Push buttons Back-Light ( >2sec) and Peak-Hold Switch : Press this button to toggle in and out of the PEAK-HOLD mode. The " P MAX " annunciator are displayed.(Response Time:>50mS) Press this button for two seconds to turn the Back-Light on. As this also activates the PEAK-HOLD mode, briefly press the button to return to normal display. To turn the Back-Light off press again for two seconds. Range Select Button Press "RANGE" button to select the desired lux or fc range.
OPERATION 1. Set the function switch to the desired lux or fc units. 2. Remove the sensor head cover. 3. Hold the sensor head steady and make certain that the light source completely fills the cosine correction dome. 4. Move away from the sensor head to avoid shadowing it. The sensor head has a 1.5 meter cable to allow separation between the observer and the measurement location. 5. Read the illuminance value from the display.
SPECIAL CONSIDERATIONS • Keep the plastic domed cosine corrector clean and free of scratches. It may be cleaned with a soft cloth and isopropyl alcohol. • When light is received from many directions simultaneously, take special care to avoid reflections or shadowing the sensor with your body. • For best accuracy, repeat the measurement several times to ensure that the light source has remained stable. • Avoid flexing the cable excessively at either end of the cable.
Cleaning Periodically wipe the case with a damp cloth and detergent, do not use abrasives or solvents.
8 380 390 400 410 420 430 440 450 460 470 480 490 500 510 520 530 540 550 555 560 570 580 590 600 610 620 630 640 650 660 670 680 690 700 710 720 730 740 750 760 Wavelength (nm) Vl CIE Photopic Luminous Effciency Coefficient 0.0000 0.0001 0.0004 0.0012 0.0040 0.0116 0.0230 0.0380 0.0600 0.0910 0.1390 0.2080 0.3230 0.5030 0.7100 0.8620 0.9540 0.9950 1.0000 0.9950 0.9520 0.8700 0.7570 0.6310 0.5030 0.3810 0.2650 0.1750 0.1070 0.0610 0.0320 0.0170 0.0082 0.0041 0.0021 0.0010 0.0005 0.0003 0.0001 0.
WARRANTY OMEGA warrants this unit to be free of defects in materials and workmanship and to give satisfactory service for a period of 13 months from date of purchase. OMEGA Warranty adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and shipping time. This ensures that OMEGA's customers receive maximum coverage on each product. If the unit should malfunction, it must be returned to the factory for evaluation.
It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that apply. OMEGA is constantly pursuing certification of its products to the European New Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification. The information contained in this document is believed to be correct but OMEGA Engineering, Inc. accepts no liability for any errors it contains, and reserves the right to alter specifications without notice.
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