LI
G
HT METE
R
Model : LM-81LX
Your purchase of this
LIGHT METER marks a
step forward for you into
the field of precision
measurement. Althou
g
h
this METER is a complex
and delicate instrument,
its durable structure will
allow many years of use if
proper operatin
g
techniques are developed.
Please read the followin
g
instructions carefully and
always keep this manual
within easy reach.
OPERATION MANUAL
TABLE OF CONTENTS
1. FEATURES................................................................ 1
2. SPECIFICATIONS...................................................... 1
3. FRONT PANEL DESCRIPTION..................................... 3
3-1 Power Button...................................................... 3
3-2 Hold Button........................................................
.
3
3-3 Max. / Min. Button............................................... 3
3-4 Zero Button......................................................... 3
3-5 Lux/Ft-cd button.................................................
.
3
3-6 Light Sensor........................................................ 3
3-7 LCD display......................................................... 3
3-8 Battery Compartment / Cover............................... 3
3-9 Wristlet............................................................... 3
4. MEASURING PROCEDURES........................................ 4
5. OTHER FUNCTIONS.................................................. 4
6. BATTERY REPLACEMENT........................................... 6
7. OPTIONAL CARRYING CASE.................................... 6
1. FEATURES
* Tiny bone shape with lightweight and small size case design
are suitable for handling with one hand.
* Wristlet design provides extra protection to the instrument
especially for user one hand operation.
* Exclusive photo diode and color correction filter light sensor,
spectrum meets C.I.E. photopic.
* Build in microprocessor circuit assures excellent
performance and accuracy.
* Concise and compact buttons arrangement, easy operation.
* Memorize the maximum and minimum value with recall.
* Lux/Feet-candle selectable by pressing button on the front
panel.
* Zero button design makes light meter calibration.
* Hold function to freeze the current reading value.
2. SPECIFICATIONS
2-1 General Specifications
Display 8 mm LCD display
Measurement Light ( Lux/Feet-candle)
Operating Max. 80% RH.
Humidity
Operating 0 to 50° C (32 to 122° F)
Temperature
1
Over Input Indication of "- - - - "
Display
Power Supply 006P DC 9V battery (Heavy duty type)
Power Approx. DC 6.2 mA
Consumption
Weight 160g (battery included)
Dimension HWD 156x60x33 mm (6.14x2.36x1.29 inch).
Standard Instruction Manual
Accessory
Optional Carrying case.
Accessory
2-2 Electrical Specification ( 23 ± 5 )
℃
Measure- Range Resolution Accureacy
ment
Lux 0 to 2,200 Lux 1 Lux
1,800 to 20,000 Lux 10 Lux ± 5% rdg ± 8 dgt
Ft-cd 0 to 204.0 Fc 0.1 Ft-cd
170 to 2,000 Fc 1 Ft-cd
Remark :
Feet-candle = Ft-cd = Fc
2
3. FRONT PANEL DESCRIPTION
Fig. 1
3-1 Power Button
3-2 Hold Button
3-3 Max. / Min. Button
3-4 Zero Button
3-5 Lux/Ft-cd button
3-6 Light Sensor
3-7 LCD display
3-8 Battery Compartment / Cover
3-9 Wristlet
3