Your purchase of this Digital Luxmeter marks a step forward

Your purchase of this Digital Luxmeter marks a step forward
Your purchase of this Digital Luxmeter marks a step forward for you
into the field of precision measurements. Although this Luxmeter is a
complex and delicate instrument, its ruggedness will allow many years.
Of use if proper operating techniques are developed. Please read the
following instructions carefully and always keep this manual within
easy reach.
CONTENTS
1. FEATURES……………………………………………………………1
2. FRONT PANEL DESCRIPTION…………………………………….3
3. SPECIFICATIONS……………………………………………………3
4. SPECTRUM FOR PHOTO DETECTOR…………………………..6
5. MEASURING PROCEDURE………………………………………..7
6. MAINTENANCE………………………………………………………8
7. RECOMMENDED ILLUMINATION…………………………………9
1. FEATURES
* Precise and easy readout.
* High accuracy and wide measurement range.
* LSI-circuit use provides high reliability and durability.
* In build LOW BATTERY indicator.
* LCD display allows clear read out even at bright places.
* LCD display provides low power consumption.
* Compact, lightweight, and excellent operation.
* Separate PHOTO DETECTOR allows user take measurements at an
optimum position.
* Data Hold function for holding measuring values.
-1-
2. FRONT PANEL DESCRIPTION
① HOLD key
② Photo Detector
③ LCD display
④ Function switch
-2-
⑤ POWER key
3. SPECIFICATIONS
3-1 General Specification
Environment Conditions:
Operating Temperature: 0℃ to 40℃≤80% RH, non-condensing
Storage Temperature: -10℃ to 60℃ ≤70% RH, battery removed
-3-
Operating principle: dual slop integration
Sample Rate: 2 times/sec for digital data
Display: 3 1/2 digits LCD Display with max. Reading 1999,
Over-range Display: "1" is displayed.
Power Supply: DC 9V battery (NEDA 1604 6F22 006P).
Low Battery Indicator:
The "
" is displayed when the battery is under the proper operation
range.
Photo Detector Lead Length: 150cm (approx.)
Photo Detector Size: 83×52×20.5mm
Dimension: 125.5(L)×72(W)×27(H)mm
Weight: 140g approx. (battery removed)
Accessories: Carrying case, battery, user's manual
3-2 Technical Specification
Accuracy: ±(% of reading + number of digits) at 18OC to 28OC (64OF
-4to 82OF) with relative humidity to 80%.
Range
Resolution
accuracy
0-1,999 Lux
1 Lux
2,000-19,990 Lux
10 Lux
20,000-50,000 Lux
100 Lux
NOTE: Accuracy tested by a standard
o
2854 K temperature
±(5%+2d)
±(5%+2d)
±(5%+2d)
parallel light tungsten lamp of
3-3 Correction Factor
Mercury Lamp …………………………..…. x 1.1
Fluorescent Lamp…………………..………x 1.0
Incandescent Light…………………………x 1.0
Daylight………………………………………x 1.0
-5-
4. SPECTRUM FOR PHOTO DETECTOR
-6-
5. MEASURING PROCEDURE
Power-up: Press the POWER key to turn the meter on.
Selecting the LUX scale: Set the Function switch to desired LUX
range.
Face the photo detector to light source in a horizontal position.
Read the illuminance value from the LCD display.
Data-Hold mode: Press the HOLD key to select Hold mode. When
HOLD mode is selected, the illuminance meter stops all further
measurements. Press the HOLD key again to cancel HOLD mode.
Then it resumes normal operation.
When the measurement is completed, turn the power off.
NOTE: If display indicates one or more leading zeros, user has to shift
the Function switch to the next lower range scale to improve resolution
and accuracy.
6. MAINTENANCE
6-1 General maintenance
-7-
To keep the instrument clean, wipe the case with a dry cloth and
detergent, do not use abrasives or solvents.
The white plastic disc on the top of the detector should be cleaned with
a damp cloth when necessary.
Any adjustment maintenance and repair shall be by a qualified person.
6-2 Battery Replacement
When the battery voltage drop below proper operation range the
symbol will appear on the LCD display and the battery need to be
replaced..
Slide the battery cover away from the instrument and remove the
battery.
Replace with 9V battery and reinstall the cover
-8-
7. RECOMMENDED ILLUMINATION
LOCATIONS
 OFFICE
Conference, Reception room.
Clerical work
Typing, drafting
 HOTEL
Public room, Cloakroom
Reception, Cashier
Lux
200 ~ 750
700 ~ 1500
1000 ~ 2000
100 ~ 200
200 ~ 1000
LOCATIONS
-9 FACTORY
Packing work, Entrance passage
Visual work at production line
Inspection work
Electronic parts assembly line
 STORE
Lux
150
300
750
1500
~ 300
~ 750
~ 1500
~ 3000
Indoors, Stairs, Corridor
Show windows, Packing table
Forefront of show windows
LOCATIONS
150 ~ 200
750 ~ 1500
1500 ~ 3000
Lux
- 10 -
 HOSPITAL
Sickroom, Warehouse
Medical Examination room
Operating room
Emergency Treatment
 SCHOOL
Auditorium, Indoor Gymnasium
Class room
100
200
750
750
~
~
~
~
200
750
1500
1500
100
300
~ 300
~ 750
Laboratory, Library, Drafting room
750
- 11 -
~ 1500
WLS211
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