INSTRUCTION MANUAL
Light Meter
T A BLET OF CONTENTS
TITLE
1. FEA TURES
2. SPECIFICATIONS
3. PANEL DESCRIPTION
4. OPERATING INSTRUCTION
5. BATTERY REPLACEMENT
1. FEA TURES
z Easy to use with pock size and light weight
z 3 1/2 digital LCD display with LUX, fc, LOBAT, MAX, HOLD indi cation
z Accurately display light level in terms of Foot Candles (Fc) or Lux over wide
range.
z Measures from 0 to 50000 Lux/ Fc in four ranges with resolution 0.1Lux/Fc .
z Max Hold and Data Hold
z Auto power off
2. SPECIFICATIONS
Display: 1999 counts LCD display with LUX, fc, LOBAT, MAX, HOLD indication
Polarity: Automatic, (-) negative polarity indication.
Over-range: “1” mark indication.
Low battery indication: The “BAT” is displayed when the battery voltage drops below the
operating level.
Measurement rate: 1.5 times per second, nominal.
Storage temperatur e: -10 oC to 60 oC (14
o
F to 140 oF) at < 80 % relative humidity
Auto Power Off: Meter automatically shuts down after approx .15 minutes of
inactivity.
Power: One standard 12V, A23 battery.
Dimensions/Wt.: 188 (H) x 64.5 (W) x 24.5 (D) mm/160g
Photo Detector Dimensions/Wt.: 115 X 60 X 27 mm/80g
Light
Measuring Range: 200, 2000, 20000, 50000 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, 50,000lux range reading x100)
Overrate Display: Highest digit of “1” is displayed.
(calibrated to standard incandescent lamp at color temperature 2856 k).
Repeatability: +
2%.
Temperature Characteristic: +
0.1% / oC.
Photo detector: One silicon photo diode with filter.
3. PANEL DESCRIPTION
1. LCD display: 1999 counts LCD display with LUX, fc, LOBAT, MAX, HOLD
indication
2. Power /function /range switch: Turn power ON or OFF and select
measurement function and ranges.
3. Photo Detector: long life silicon photo diode inside
4. MAX. HOLD: If you press the MAX. button, the maximum reading will be held.
Press once again the button, will release the hold and allow a
further measurement.
5. DATA HOLD: The reading will be held when Data Hold button Switch is pressed.
If the button Switch is pressed once again, will release the hold
and allow a further measurement.
6. Function button: Selects measurement functions of Lux or fc
4. OPERATING INSTRUCTION
Measuring Light
1. Turn the power/function/range switch to select the range to desired (x1 lux/fc ,
x10lux/fc, x100lux/fc ) range.
2. Remove the photo detector to light source in a horizontal position.
3. Read the illuminance nominal from the LCD display.
4. Over-range: If the instrument only display one “1” in the M.S.D. the input signal is
too strong, and a higher range should be selected.
5. When the measurement is completed. Replace the photo detector from the light
source.
6. Spectral sensitivity characteristic: To the detector, the applied photo diode with
filters makes the spectral sensitivity characteristic almost meet C.I.E. (International
Commission on Illumination) photopia curve V (λ) as the following chart
described.
100% (Relative Sensitivity) Spectral Sensitivity
80% V(λ)
60%
40%
20%
0
400 500 600 700
Wavelength (nm)
7. 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 sign “BAT” appears on the LCD display, it indicates that the battery should be
replaced. Open the battery case and replace the exhausted battery with new battery.
(1 x 12V battery , A23 or equivalent )
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