Kusam-meco KM-LUX-200K User manual

All specifications are subject to change without prior notice.
DIGITAL LUX METER
Model - KM-LUX-200K
GENERAL SPECIFICATIONS:
FEATURES :
— Precise & easy readout.
— High accuracy in measuring.
— LSI - circuit use provides high reliability & durability.
— Permits a wide range of light measurements.
— Low Battery Indication.
— Auto zero adjust.
— Compact, light-weight, & excellent operation.
— LCD display can clearly read out even in High Ambient Light
— LCD display provides low power consumption.
— Separate LIGHT SENSOR allows user take measurements at an optimum position.
®®
AN ISO 9001:2008 COMPANY
• Display:
• Ranges: 200, 2000, 20000, 200000Lux.(4 Ranges)
(20,000Lux range reading x 10, 200,000Lux range reading x 100)
20, 200, 2000, 20000FC (20,000FC range reading x 10).
• Over range display: Highest digit of "I" is displayed.
• Measuring Rate: Approx. 2.0 time / sec.
• Operating Temperature: 0°C to 40°C (32°F ~ 104°F)
• Operating Humidity: 0 ~ 80% R.H
• Dimension: 149(H) x 71(W) x 41(D)mm
• Weight: Approx. 250g (including battery)
• Standard Accessories: Light Sensor, Instruction manual, Battery & Carrying case.
3½ digits LCD Display with maximum reading of 1999.
• Accuracy: ± 3%rdg ± 0.5% f.s. (± 5%rdg ± 10dgts as > 20,000Lux / 2000FC range)
(Calibrated to standard incandescent lamp at color temperature 2856K).
• Repeatability: ± 2%
• Photo Detector : One silicon photo diode with filter.
• Data Hold & Peak Hold Function.
• Storage Temperature: -10°C to 60°C (14°F ~ 140°F)
• Storage Humidity: 0 ~ 80% R.H
• Power Supply: DC 9V battery .
• Photo Detector Dimension: 100(H) x 60(W) x 28(D)mm
• Photo Detector Lead Length: Approx. 150cm
Chhaya com/D/chhaya/my documents/chhaya/backup/catlog/New catlog/2015 new arrival catalogs/KM-LUX-200K.cdr
An ISO 9001:2008 Company
®
G-17, Bharat Industrial Estate, T. J. Road, Sewree (W), Mumbai - 400 015. INDIA.
Sales Direct.: 022-24156638, Tel. : [phone] Fax : [phone]
Email : [email protected] Website : www.kusamelectrical.com

An ISO 9001:2008 company
DIGITAL LUX METER
Model - KM-LUX-99 / KM-LUX-200K
GENERAL INFORMATION
All models have a fast and accurate response. The sensors are cosine and color corrected
and sealed to ensure long term stability. These meters come ready to use with 9V battery, Carrying Case,
Instructions & 1 year warranty.
Light can be quantified in many ways, i.e., Lux, Lumens, Footcandles, Candle Power, Candelas, and so on. The
two most popular scales are Lux, which is the European measure, and Footcandles which is the U.S. Scale.
Lux is a unit of illumination on one square meter which is one meter away from a uniform light source.
1 candela = 1 Lux.
Footcandles are a unit of illumination on one square foot which is one foot away from a uniform light source.
Light Measurement Conversion Factors
Abbreviations :
FC = Footcandle, Lux = Lux, Lumen = Lumen
How Light Meters Work
Most meters consist of a body, a photo cell and a readout. The light that falls on the photo cell has energy. This
energy is transferred by the photo cell into electric current; the amount of current generated depends on the
amount of light striking the cell. The meter then reads the electrical current and calculates the appropriate value of
either Lux or Footcandles.
A key thing to remember about light is that it is usually made up of many different types (colors) of light at different
wavelengths. The reading, therefore, is a result of the combined effects of all the wavelengths. A standard color
can be referred to as color temperature and is expressed in degrees Kelvin. The standard color temperature for
calibration of most light meters is 2856 degrees Kelvin which is more yellow than pure white.
Different types of light bulbs burn at different color temperatures. “KUSAM-MECO” meter readings will, therefore,
vary with different light sources of the same intensity. This is why some lights seem “harsher” than others. See
the chart below for suggested lighting levels for various applications.
And;
1 square foot = 0.0929
square meters
Then;
1 Lux = 0.0929 Fc,
and 1 FC = 10.76 Lux.
Since : 1 FC = 1 Lumen / square foot,
and 1 Lux = 1 Lumen /
square meter

What lighting levels do I need ?
The Australian standard for required workplace illumination AS 1680.1.2006 offer the following advice :
Class of Task
Recommended
Maintained
illuminance lux
Characteristics of the
activity / interior Representative activities / interiors
Movement and
Orientation 40
Interiors rarely visited with visual
tasks limited to movement &
orientation
Corridors, cable tunnels, indoor storage
tanks; walkways
Rough
Intermittent 80
Interiors requiring intermittent use
with visual tasks limited to move-
ment, orientation & coarse details.
Staff change rooms; live storage of bulky
materials; dead storage of materials
needing care; locker rooms; loading bays
Simple
Workplace
tasks
160
Any continuously occupied interior
where there are no tasks requiring
perception of other than coarse
detail. Occasional reading of
clearly printed documents for
short periods.
Waiting Rooms, staff canteens; rough
checking of stock; rough bench and machine
work; enterance hall; general fabrication of
structural steel; casting concrete; automated
process monitoring; turbine halls.
Ordinary or
Moderately easy
work task
240
Continuously occupied interiors
with moderately easy visual tasks
with high contrasts or large detail
School chalkboards and charts; medium
woodworking; food preparation; counters
for transactions.
Moderately
Difficult work
tasks
320-400
Areas where visual tasks are
moderately difficult with moderate
detail or with low contrasts
Routine office tasks eg reading, typing,
enquiry desks. Inspection of medium work;
fine woodwork; car assembly
Difficult work
tasks 600
Areas where visual tasks are
difficult with small detail or with
low contrasts
Drawing boards; most inspection tasks;
proofreading; fine machine work; fine
painting and finishing; colour matching.
Very Difficult
work tasks 800
Areas where visual tasks are very
difficult with very small detail or
with very low contrasts
Fine inspection; paint retouching; fine
manufacture; grading of dark materials;
colour matching of dyes.
Extremely
Difficult 1200
Areas where visual tasks are
extremely difficult with extremely
small detail or low contrasts.
Visual aids may assist
Graphic arts inspection; hand tailoring;
fine die sinking; inspection of dark goods;
extra fine benchwork
Exceptionally
Difficult 1600
Areas where visual tasks are
exceptionally difficult with
exceptionally small detail or with
very low contrasts.
Visual aids will be of advantage.
Finished fabric inspection; assembly of
minute mechanisms, jewellry and
watchmaking.
What to look for in light meters
For accurate measurement of illuminance you should ensure your light meter should have cosine and color
correction. The cosine correction allows for the effects of light falling on the cell at oblique angles, colour correction
is needed in order to match the spectral sensitivity of the human eye.
There are a number of cheap lightmeters in India, they are both cheap in Rupee terms and in construction- they
have poor quality colour correction because of the lower quality colour correction filters they use. They tend not to
fit the red or blue ends of the CIE V, lamda curve. Errors as much as 500% can occur in high pressure sodium or
metal halide lighting.