Omega HHLM112SD User Manual

HHLM112SD

Light Meter with

Data Logging SD Card

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User’s Guide

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MADE IN TAIWAN

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It is the policy of OMEGA Engineering, Inc. 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 accepts no liability for any errors it
contains, and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, human applications.

Czech Republic:

Frystatska 184, 733 01 Karvina´, Czech Republic
Tel: [phone]
FAX: [phone]
Toll Free: 0800-1-66342
e-mail: [e-mail]

Germany/Austria:

Daimlerstrasse 26, D-75392
Deckenpfronn, Germany
Tel: [phone]
FAX: [phone]
Toll Free in Germany: 0800 639 7678
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Servicing Europe:

U.S.A. and Canada:

Sales Service: 1-800-826-6342/1-800-TC-OMEGA

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Customer Service: 1-800-622-2378/1-800-622-BEST

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

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U.S.A.: ISO 9001 Certified

One Omega Drive, Box 4047
Stamford, CT 06907-0047
Tel: [phone]
FAX: [phone]
e-mail: [e-mail]

Servicing North America:

For immediate technical or application assistance:

Mexico:

En Espan~ol: [phone]-7803
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e-mail: [e-mail]

[e-mail]

United Kingdom:

ISO 9002 Certified

One Omega Drive
River Bend Technology Centre
Northbank, Irlam
Manchester M44 5BD
United Kingdom
Tel: [phone]
FAX: [phone]

Toll Free in United Kingdom:
0800-488-488
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Canada:

976 Bergar
Laval (Quebec) H7L 5A1, Canada
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TABLE OF CONTENTS

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Operating Instructions . . . . . . . . . . . . . . . . . . . . . 4 – 11

What’s in the case . . . . . . . . . . . . . . . . . . . . 4 – 5

Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 – 8

Normal Operation . . . . . . . . . . . . . . . . . . . . . 8 – 9

Holding and Storing Measurements. . . . . . . . . . 9

Automatic vs. Manual Datalogging . . . . . . 9 – 10

Transferring Data from the SD Card

to a Computer . . . . . . . . . . . . . . . . . . . . . . 10 – 11

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Maintenance & Troubleshooting Tips . . . . . . . . . . . . 13

Optional Accessories. . . . . . . . . . . . . . . . . . . . . . . . . 13

2

INTRODUCTION

Thank you for purchasing the HHLM112SD UV Light Meter with Data Logging SD card.

Please read this user’s manual carefully and thoroughly

before using the instrument.

The HHLM112SD is a general-purpose handheld instrument suitable for measuring
the intensity of light in commercial, industrial and consumer settings. Applications
include photography, videography, construction, engineering and surveillance.

This light meter measures light intensity using either of two units: lux or foot-candles.
Th

e lux is the standard international unit of illuminance, or how much luminous flux
is spread over a given area. One can think of luminous flux as a measure of the total
“amount” of visible light present, and illuminance as a measure of the intensity of
illumination on a surface. A given amount of light will illuminate a surface more dimly
if it is spread over a larger area, so illuminance is inversely proportional to area.

Th

e standard international unit of luminous flux is the lumen, and one lux is equal to
one lumen/m2. For perspective on lux readings from the natural world, consider that
a moonless clear night sky has an illuminance of about 0.002 lux, while direct
sunlight has an illuminance of 30,000 to 130,000 lux.

The footcandle (or lumen per square f

oot) is a non-standard unit of illuminance.

Like th

e Btu, it is mainly in common use only in the U.S., particularly in construction­related engineering and in building codes. Because lux and footcandles are different
units of the same quantity, it is perfectly valid to convert footcandles to lux and vice
versa. One footcandle (ft-cd) = 10.764 lux.

The HHLM112SD has the performance and features needed to satis

fy the most

deman

ding aspects of the above applications. It also has the ability to measure
surface temperature, using an optional Type K of Type thermocouple. A light probe
comes standard with the instrument.

Because it is microprocessor-based, the HHLM112SD can make full use of the
portability, reliability and large storage capacities that SD memory cards offer.
Measurements of light intensity or temperature c

an be made automatically at any

of 11

sampling rates between one second and one hour. After time-stamping and
storing the measurements on an SD card plugged into the instrument (a process
called datalogging), the user can remove the card and transfer the measurements
to a laptop or desktop computer either directly or via a USB card reader.

The HHLM112SD has a backlit 2-1/2 in. diagonal display and is powered

by six “AA”

Alkal

ine batteries or an optional 9-VDC AC adapter.

3

KEY FEATURES

• Includes light probe

• Measures light intensity within three automatically switched full-scale

ranges: 2,000 lux, 20,000 lux and 100,000 lux (200 ft-cd, 2,000 ft-cd and
10,000 ft-cd)

• Selectable lux or foot-candle unit

• Displays maximum and minimum readings

• Performs real-time automatic datalogging at sampling time settable from

1 second to 1 hour

• Also supports manual logging and chang

ing

of card storage location

• Accepts SD memory cards of up to 16 GB capacity

• Big (2.5 in. diagonal) front-panel green backlit LCD is easy to read

• Auto power off function

• Powered by six “AA” batteries or optional 9V AC/DC adapter

OPERATING INSTRUCTIONS

WHAT’S IN THE CASE

The HHLM112SD comes fully assembled in a carrying case along with a light
probe with a protective cover, a 2 GB SD memory card and this user’s manual.

Figure 1 shows all of the controls and indicators on the front, back, top, bottom
and right side of the HHLM112SD. It also shows (at right) the main components
of the supplied light probe. Familiarize yourself with their positions

and

f

unctions before moving on to the setup procedure.

4