LIGHT INTENSITY METER
Users Manual
■. I
ntroduction
Thank you for purchasing the light intensity meter from
us. Please take a few minutes to browse through this
user manual before you begin to operate the meter to
ensure that you are fully familiarized with how best to
operate the meter as accu rately and safely as possible .
This meter is an illuminance measuring instrument. It is
normally used to measure illuminances, e.g.at
workplaces.
1.1 Precautions safety measures
To get the best service from this meter, please read
this user's manual carefully and observe the detailed
safety precautions strictly.
1.1.1 During use
1. If the OL symbol will show on the LCD, it means the
readings is outside the measuring range. Please keep
to the permitted measuring range.
2. Never store the product together with solvents, acides
or other aggressive substances.
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3. When the battery voltage is under proper operation
requirement, the symbol will show on the LCD and
the battery need to be replaced with new.
1.1.2 Maintaining the product
Do not measure at a high temperature, high
humidity places.
Keep the light sensor clean.
To guarantee correct readings: Hold the
instrument horizontally so that the light sensor is
directed upwards.
When not using the instrument for a long time,
please remove the battery and avoid storing in
high temperature and high humidity.
■. Features
1. Display: 6 digits LCD Display
2. Parameters：
Lux（lm/m2）
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foot candle (lm/ft2)
3. Resolution: 1 Lux（0…90000 Lux ）；
0.1 ftc（0…8300.0 ftc）；
4. Range: 0…90000 Lux
0…8300.0 ftc
5. Accuracy: ±(3% +30 digits) to reference
6. Sample rate: 1 time /sec
7. auto power off: about 20 minutes
8. low battery indicator
9. Operating environment:
0℃ ~ 50 ℃(32℉~122℉)，0 ~ 80%RH
10. Storage environment:
-20℃ ~ 60℃(-4℉~140℉)，0 ~ 80%RH
11. Dimension and Weight:
121(L)x60(W)x30(H)mm, about 180g
12. Accessorie s:
DC1.5V (AAA) x 3pcs
String x 1pcs
Plastic box x 1pcs
Users manual x 1pcs
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■. Names o
f parts
Instrument Familiarization
Unit
Func
.
ON/OFF
Lig h t in te n s ity mete r
1. Sensor cover
2. Light sensor
3. LCD display
4. Function key
LCD Display
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The meaning of the symbols represented by the
following table
Number
of Order
Symbol Functions
1
Indicating it is now in
the data-holding mode
2
Indicating the display
value being the
maximum value(MAX)
3
Indicating the display
value being the
minimum value(MIN)
4
Measure values
5
parameter unit
6
parameter unit
7
Indication to the
calibration mode
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8
Indication low pow er of
batteries.
Batteries should be
replaced.
■. Operation instruction
1. Please install new batteries on the meter .
2. Put the meter on the environment to be measured
and hold it horizontally so that the light sensor is
directed upwards.
3. Press the ON/OFF key to turn the power on.
4. After power on, press the Unit key to select the
needed unit s.
5. When the reading has been stable, read the
illumination value.
* If you still need more operations, please see the
description of keys instruction.
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■. Keys instruction
1. ON/OFF key
Press the ke y to turn th e power ON and p ress the key
once more to turn the power OFF.
2. Func. key
Press the key can select the state of MAX、MIN、
HOLD.
The cycle of views shows as following figure:
M
ode key Mode key
Measure mode Hold mode Max mode
Min mode
Mode key Mode key
Hold mode: Reading are held.
Max mode: Maximum values since the instrument
was last switched on or last reset.
Min mode: Minimum values since the instrument
was last switched on or last reset.
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3. Unit key
1) Unit set
Press the key can change the parameter unit: lux, ftc.
2) Back light contrl
If press the key >2sec. the b ac k light will be turned on,
Press the key onc e >2sec. t he light will be tu rned off. If
the back light is not cl os ed within 60 se co nds, it will b e
turned off automatically.
3) Auto power off set
When the meter is powered on, it is under auto
power off mo de. The meter will power it self off after 20
minutes if no key operation.
Cancelled auto power off function: press Unit key
when power on until the LCD display AP OFF, then
press the ON/OFF key to c onfirm the setti ng. A nd th en
the meter will be power off.
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■. Re
ference table of illumination standard
Place Illumination
- Office
Conference Room,
Living room
200 ~ 750
Administration 700 ~ 1,500
Typing 1000 ~ 2,000
- Factory
Packaging, Access 150 ~ 300
Assembly line 300 ~ 750
Check 750 ~ 1,500
Electronic com po nents
assembly line
1,500 ~ 3,000
- Hotel
Public places, Lavatory 100 ~ 200
Reception room 200 ~1,000
- Store
Staircase, corridor 150 ~ 200
Presentation window,
Packaging station
750 ~ 1,500
Shop window 1,500 ~ 3,000
- Hospital
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Ward, Warehouse 100 ~ 200
Medical examination
room
300 ~ 750
Operating room,
Emergency Room
750 ~ 1,500
- School
Hall, Indoor stadium,
Classroom
200 ~ 750
Laboratory, Library 500 ~ 1,500
■. Maintenance
1. CLEANING INSTRUCTIONS
The meter may be wiped down with a wet sponge or
cloth using a mild water based detergent or
anti-bacterial soap and rinsed under a gentle stream
of cold water.
NOTE:
This unit is not designed for complete submersion or
washing in water.
2. BATTERY REPLACEMENT
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Use the following procedure:
When the battery voltage drop below proper operation
range the
symbol will appear on the LCD display
and the battery need to be replaced.
Press the battery cover and towards arrowhead
direction to open the battery cover.
Replace the battery with three new 1.5V batteries
(AAA).
Replace the battery cover.
WLS2110
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