Omega HHLM-2 Manual de usuario

OMEGA

HHLM-2

Digital Lightmeter

OMEGAnetSM On-Line Service

http://www.omega.com

Internet e-mail

[email protected]

For immediate technical or application assistance:

USA and Canada: Mexico and Latin America:

Sales Service: 1-800-826-6342 / 1-800-TC-OMEGASM Tel: (95) 800-TC-OMEGASM

Customer Service: 1-800-622-2378 / 1-800-622-BESTSM FAX: (95) 203-359-7807

Engineering Service: 1-800-872-9436 / 1-800-USA-WHEN

En Español: (203) 359-7803

TELEX: 996404 EASYLINK: 62968934 CABLE: OMEGA

e-mail: [email protected]

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: [email protected] e-mail: [email protected]

Servicing Europe:

Benelux:

Postbus 8034, 1180 LA Amstelveen,

The Netherlands

Tel: (31) 20 6418405 FAX: (31) 20 6434643

Toll Free in Benelux: 06 0993344

e-mail: [email protected]

Czech Republic:

ul. Rude armady 1868, 733 01 Karvina-

Hranice, Czech Repubic

Tel: 420 (69) 6311627 FAX: 420 (69)

6311114

e-mail: [email protected]

France:

9, rue Denis Papin, 78190 Trappes

Tel: (33) 130-621-400 FAX: (33)130-699-120

Toll Free in France: 0800-4-06342

e-mail: [email protected]

Germany/Austria:

Daimlerstrasse 26, D-75392

Deckenpfronn, Germany

Tel: 49 (07056) 3017 FAX: 49 (07056) 8540

Toll Free in Germany: 0800 82 66342

e-mail: [email protected]

United Kingdom: ISO 9002 Certified

One Omega Drive

Riverbend Technology Centre Northbank, Irlam,

Manchester, M44 5EX, England

Tel: 44 (161) 777-6611 FAX: 44 (161) 777-6622

Toll Free in England: 0800-488-488

e-mail: [email protected]

omega.com

INTRODUCTION

This instrument is a portable easy use 3½ digit, compact-sized digital

lightmeterdesignedforsimpleonehandoperation.Providesselectedtheluxand

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 hazard, do not operate this product in an explosive

atmosphere.

• To avoid eye injury, wear eye protection if there is a possibility of exposure

to high-intensity rays.

• Do not immerse in liquids, clean the sensor head using only a damp cloth.

• Coversensorheadwhennotinusetoextendsiliconphotodiodesensorlife.

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.

StorageTemperature: -20°Cto60°C(-4°Fto140°F),0to80%R.H.withbattery

removed from meter.

Accuracy: Stated accuracy at 23°C ± 5°C (73°F ± 9°F), <70% relative humidity.

Analog Output: 0.1mV/counts

Battery: 4 pcs 1.5V (AAA size).

Battery Life: 200 hours typical.

Dimensions: 170mm(H) x 44mm(W) x 40mm(D).

Weight: 220g (7.76oz) including batteries.

The symbol on the instrument indicates that the operator must refer to an

explanation in this manual.

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,0.01fc

Spectral response: CIE photopic

The CIE photopic curve is an international standard for the color response

of the average human eye

Acceptance angle: ¦¢2<2% cosine corrected (150°)

Total accuracy for CIE standard illuminant A (2856K): ±(3%rdg + 10dgts)

CIE standard illuminant A can be realised by means of CIE standard

source A, which is defined as: A gas-filled tungsten-filament lamp

operating at a correlated colour temperature of 2856K

Temperature Coefficient: 0.1x (specified accuracy)/°C (<18°C or >28°C),

0.056x(specified accuracy)/°F (<64.4°F or >82.4°F)

Peak Hold response time: >50mS pulse light

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)

Pressthis buttonfortwo secondstoturn theBack-Lighton. Asthisalso 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. Each time you press

"RANGE" button, the range (and the input range annunciator) incremants, and

a new value is displayed.

HOLD (DATA-HOLD) Button

Press"HOLD"buttontotoggleinandoutoftheDATA-HOLDmode.IntheDATA-

HOLDmode,the"H"annunciatorisdisplayedandthelastreadingisheldonthe

display.

OPERATION

1. Set the function switch to the desired lux or fc units.

2. Remove the sensor head cover.

3.Holdthesensorheadsteadyandmakecertainthatthelightsourcecompletely

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 the highest range and reduce until a satisfac-

tory reading is obtained.

6. Cover sensor head to extend sensor life.

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

ThelawstatingthattheilluminanceEatapointonasurfacevariesdirectlywith

the intensity I of a point source, and inversely as the square of the distance d

between the source and the point. If the surface at the point is normal to the

direction of the incident light, the law is expressed by E=I/d2.

•Cosine Law

The law that the illuminance on any surface varies as the cosine of the angle

of incidence. The angle of incidence

is the angle between the normal to the

surface and the direction of the incident light. The inverse-square low and the

cosine law can be combined as E=(I cos

)/d2.

Cleaning

Periodicallywipethecasewithadampclothanddetergent,donotuse abrasives

or solvents.

CIE Photopic Curve

Luminous Efficiency Coefficient

Lumen/Watt Conversion Factor

Wavelength in Nanometers

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

610 0.5030 343.0

620 0.3810 260.0

630 0.2650 181.0

640 0.1750 119.0

650 0.1070 73.0

660 0.0610 41.4

670 0.0320 21.8

680 0.0170 11.6

690 0.0082 5.59

700 0.0041 2.78

710 0.0021 1.43

720 0.0010 0.716

730 0.0005 0.355

740 0.0003 0.170

750 0.0001 0.820

760 0.0001 0.041

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