instruction manual
INSTRUCTION MANUAL
Light Meter
TABLET OF CONTENTS
TITLE
1.
FEATURES
2.
SPECIFICATIONS
3.
PANEL DESCRIPTION
4.
OPERATING INSTRUCTION
5.
BATTERY REPLACEMENT
1.
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2.
Auto Power Off: Meter automatically shuts down after approx .17 minutes of
inactivity.
Power: One standard 9V battery.
Dimensions/Wt.: 157 (H) x 54 (W) x 34 (D) mm/170g
Light
Measuring Range: 200, 2000, 20000, 40000 Lux/fc (1Fc=10.76 Lux)
Accuracy: + 5% rdg + 10dgts (< 10,000Lux/fc)
Accuracy: + 10% rdg + 10dgts (> 10,000Lux/fc)
(20,000lux range reading x10, 40,000lux range reading x100)
Overrate Display: “OL” is displayed.
(Calibrated to standard incandescent lamp at color temperature 2856 k).
Repeatability: + 2%.
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Temperature Characteristic: +0.1% / C.
Photo detector: One silicon photo diode with filter.
FEATURES
Easy to use, pock size and light weight
3 1/2 digital LCD display with LUX, fc, LOBAT, MAX indication
Accurately display light level in terms of Foot Candles (Fc) or Lux over wide
range.
Measures from 0 to 40000 Lux/ Fc in four ranges with resolution 0.1Lux/Fc .
Auto ranging
Max Hold
Light sensitive backlight LCD
Auto power off
SPECIFICATIONS
Display: 1999 counts LCD display with LUX, fc, LOBAT, MAX indication
Polarity: Automatic, (-) negative polarity indication.
Over-range: “OV” mark indication.
Low battery indication: The “BAT” icon is displayed when the battery voltage drops below
the operating level.
Measurement rate: 2.5 times per second, nominal.
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Storage temperature: -10 C to 60 C (14 F to 140 F) at < 80 % relative humidity
Operating temperature & Humidity: 0℃ to 40℃(32℉to 104℉) & 0% to 80%
RH.
3.
PANEL DESCRIPTION
100% (Relative Sensitivity)
1. Photo detector: long life silicon photo diode inside
2. MAX and LUX/Fc function button: Press button quickly, the max reading will be
displayed. Pressing it once again will release the hold and allow another
measurement. Pressing this function button for 2 seconds will change the display
between LUX and Fc.
3. Power : Turn power ON or OFF.
4. LCD Backlight Control: Meter will be will sensitive to environment light intensity,
if the environment is dark, it will turn on the LCD backlight on automatically,
otherwise it will turn off the LCD backlight.
5. Auto-ranging: x10 means the meter is in range 20k Lux, and the readings should
multiple with 10; x100 means the meter is in range 40k Lux, and the readings
should multiple with 100.
6. LCD display: 1999 counts LCD display with LUX, fc,
, MAX, indication
4.
OPERATING INSTRUCTION
Measuring Light
1. Press the power button to start normal measurement.
2. Remove the photo detector to light source in a horizontal position.
3. Read the luminance on the LCD display. If the environment is dark, the LCD
backlight will automatically turn on.
4. The measure range will changed automatically with the light intensity. It includes
200.0 Lux,2000 Lux,20 KLux and 40 KLux 4 ranges for Lux; or 20.0 FC,200
FC,2000 FC,4000 FC 4 ranges for FC correspondingly.
5. Press the function button for about 2 second to change the unit between Lux and Fc
6. Press the function button quickly to change to the MAX HOLD function. Press
once again to release the hold and allow another measurement.
7. Over-range: If the instrument display “OL” in the M.S.D. the input signal is too
strong
8. When the measurement is finished, replace the photo detector from the light
source.
9. Spectral characteristics of sensitivity: The photo diode with filters applied to the
spectral sensitivity does meet CIE (International Commission on Illumination)
photopia curve V ( ) as the following chart describes.
Spectral Sensitivity
V(λ )
Wavelength nm)
10. Recommended Illumination:
Locations
Lux
*Office
Conference, Reception room.
200~750
Clerical work
700~1,500
Typing drafting
1000~2,000
*Factory
Packing work, Entrance passage
150~300
Visual work at production line
300~750
Inspection work
750~1,500
Electronic parts assembly line
1500~3,000
*Hotel
Public room, Cloakroom
100~200
Reception, Cashier
200~1,000
*Store
Indoors Stairs Corridor
150~200
Show window, Packing table
750~1,500
Forefront of show window
1500 ~3,000
*Hospital
Sickroom, Warehouse
100~200
Medical Examination room
300~750
Operating room
Emergency Treatment
750~1,500
*School
Auditorium, Indoor Gymnasium
100~300
Class room
200~750
Laboratory Library Drafting room
500~1,500
5.
BATTERY REPLACEMENT
If the battery icon
appears on the LCD display, it indicates that the battery
should be replaced. Open the battery case and replace the expired battery with new
battery. (1 x 9V battery)
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