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OMEGA
HHLM-2
Digital Lightmeter
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TM omega.com SM OMEGAnet On-Line Service Internet e-mail http://www.omega.com info@omega.com Servicing North America: For immediate technical or application assistance: USA: ISO 9001 Certified Canada: USA and Canada: Mexico and Latin America: SM SM One Omega Drive, Box 4047 976 Bergar Sales Service: 1-800-826-6342 / 1-800-TC-OMEGA Tel: (95) 800-TC-OMEGA SM Stamford, CT 06907-0047 Laval (Quebec) H7L5A1 Customer Service: 1-800-622-2378 / 1-800-622-BEST FAX: (95) 203-359-7807 SM Tel: (203) 359-1660
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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. • To avoid injury or fire hazar
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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. Storage Temperature: -20°C to 6
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ELECTRICAL Photometric Formulas: 2 10.764·footcandles=lux (lumens/meter ) 2 0.0929·lux=footcandles(lumens/foot ) Range: 20lux,200lux,2000lux,20000lux,20fc,200fc,2000fc,20000fc Resolution: 0.01lux,0.01fc Spectral response: CIE photopic The CIE photopic curve is an international standard for the color response of the average human eye Acceptance angle: ¦¢ <2% cosine corrected (150°) 2 Total accuracy for CIE standard illuminant A (2856K): ±(3%rdg + 10dgts) CIE standard illuminant A can be realised
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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. E
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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 measure- ment location. 5. Read the illuminance value from the display. If magnitude of lux (or fc) is not known, press RANGE button to th
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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. • The Inverse-square Law The
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Cleaning Periodically wipe the case with a damp cloth and detergent, do not use abrasives or solvents. CIE Photopic Curve Wavelength in Nanometers 7 Luminous Efficiency Coefficient Lumen/Watt Conversion Factor
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8 Vl CIE Photopic Photopic Wavelength Luminous Lumen/Watt (nm) Effciency Conversion Coefficient Factor 380 0.0000 0.05 390 0.0001 0.13 400 0.0004 0.27 410 0.0012 0.82 420 0.0040 2.73 430 0.0116 7.91 440 0.0230 15.7 450 0.0380 25.9 460 0.0600 40.9 470 0.0910 62.1 480 0.1390 94.8 490 0.2080 142.0 500 0.3230 220.0 510 0.5030 343.0 520 0.7100 484.0 530 0.8620 588.0 540 0.9540 650.0 550 0.9950 679.0 555 1.0000 683.0 560 0.9950 679.0 570 0.9520 649.0 580 0.8700 593.0 590 0.7570 516.0 600 0.6310 430.0
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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. OMEGA's Customer Service Depar
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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. WARNING: These pro
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