RS RS-01 User manual

RS Light Meter
RS-01
INSTRUCTION MANUAL
D-H

CONTENTS
Title Page
1. INTRODUCTION ......................................................... 1
2. FEATURES.................................................................. 1
3. SPECIFICATIONS....................................................... 2
4. NAME OF PARTS AND POSITIONS.......................... 3
5. OPERATING INSTRUCTIONS ................................... 4
6. BATTERY CHECK ＆REPLACEMENT..................... 9
7. SPECTRAL SENSITIVITY CHARACTERISTICS..... 10
8. MAINTENANCE ........................................................ 11
9. RECOMMENDED ILLUMINATION ........................... 11

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1. . I IN NT TR RO OD DU UC CT TI IO ON N
The RS-01 digital illuminance meter is a portable
precision instrument used to measure illuminance（lux,
footcandle）in the field.
It meets the CIE photopic spectral response, f ’1≦6%.
It is fully cosine corrected for the angular incidence of light.
The illuminance meter is compact, robust and easy to
operate due to its construction.
The light sensitive components used in the meter are a
very stable, long-life silicon photodiode and spectral
response filter.
 U.S. Pat. No. 446,135
2 2. . F FE EA AT TU UR RE ES S
Dual display, 4 digit LCD readout.
Spectral sensitivity close to CIE photopic curve.
Measuring levels: 0.01 lux to 50.00 klux, 0.001 fc to
5.000 kfc, in 4 ranges.
Accurate and instant response.
Luminous intensity measurement.
Data-hold function.
Data memorize and read function.
Point-average function.
Auto power-off function.

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3. . S SP PE EC CI IF FI IC CA AT TI IO ON NS S
•Display：Dual display, 4 digit LCD readout.
•Measuring range：50.00 lux, 500.0 lux, 5000 lux,
50.00 klux, (Autoranging 4 step) /
5.000 fc, 50.00 fc, 500.0 fc, 5000 fc
Note: 1fc =10.76 lux.
•Overrange display：LCD will show “OL” symbol.
•Spectral response : CIE Photopic. (CIE = human eye
response curve).
•Spectral accuracy : CIE Vλfunction f ’1≦6%
•Cosine response : f ’2≦2%
•Accuracy：± 3%rdg ±5digits (@23℃±5℃)
(Calibrated to standard incandescent lamp at a colour
temperature of 2856 K）
•Temperature characteristics：± 0.1%/℃.
•Sampling rate: 5 times/sec.
•Photo detector：Silicon photo diode and spectral
response filter.
•Manual data memory capacity：99 sets.
•Operating temperature & humidity：
0℃to 50℃（32℉to 122℉）& 0% to 80% RH.
•Storage temperature and humidity：
-10℃to 60℃（14℉to 140℉）& 0% to 70% RH.
•Power source：Qty 6 size AAA batteries.
•Battery life (typical)：100 hours (zinc/carbon batteries).
•Photo detector lead length：150 cm (approx.).
•Photo detector dimensions：92Lx60Wx29H (mm)
•Meter dimensions/weight：150Lx72Wx35H (mm)/320g
•Accessories：Carry case, instruction manual, batteries.

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4. . N NA AM ME E O OF F P PA AR RT TS S A AN ND D P PO OS SI IT TI IO ON NS S
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1. LCD display：4-digit dual display, each with a maximum
reading of 5000, annunciators for measured
values, unit functions and decimal points etc.
2. Power button：The power button turns the instrument
ON or OFF.
3. AVG button: Activates the point-average mode.
4. H Data-hold button: Freeze or unfreeze the displayed
readings.
5. cd button: Enter luminous intensity mode.
6. button: Scroll to a setting mode, or increase or
decrease the displayed setting value.

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7. Lux/fc button:
cIlluminance scale select. (1 footcandle＝10.76 lux)
dBuzzer enable/disable option. Hold down “Lux/fc”
button then press the power-on button to turn the
buzzer sound on or off.
8. MEM button: Press once to store the data shown on the
LCD to memory.
9. READ button: Press to enter the data memory read mode.
10. Photo Detector.
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5. . O OP PE ER RA AT TI IN NG G I IN NS ST TR RU UC CT TI IO ON NS S
5-1 Illuminance Measurement
1. Press the “ ” power button to turn the meter on.
2. Press “lux/fc” button to select the desired units; lux or fc.
3. Remove the photo detector cap and place the detector so
the light falls squarely on the detector filter.
4. Read the illuminance value from the LCD display.
5. If required, press the “ H ” button to freeze the
displayed value.
Press the “ H ” button again to unfreeze the display and
return to normal reading mode.
D-H

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5-2 Point average measurement
Illuminance is a measure of the amount of light falling upon a
prescribed surface area. As the RS-01 detector has only a
small sensor area, the measured light level is multiplied and
averaged proportionally using the point average function
within the instrument to provide a corrected reading.
1. Press the “ ” power button to turn the meter on.
2. Press the “lux/fc” button to select the desired units; lux or
fc.
3. Remove the photo detector cap and place the detector so
the light falls squarely on the detector filter.
4. Press the “AVG” button to enter to point illuminance
average mode. The annunciator “AVG” is displayed. The
maximum number of point measurements is 99.
5. Each subsequent press of the “MEM” button stores one
measured point value to memory. The annunciator “AVG
NO.XX” is displayed.
6. Press the “READ” button to cycle through the memory
locations and perform the point average calculation. The
second annunciator “ AVG ” is displayed with the current
illuminace value reading.
7. Press the “MEM” button to add the new illuminance
measured value for the average calculation.
8. Press the " " or " " button to display each of the
previously measured point data.
9. Press the "AVG" button to exit this mode. All measured
data stored in memory will remain, even if the instrument
power is turned off. Only when new point data AVG is
stored in memory No.1 will all previous measured data
be cleared.

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10. Previously measured data display procedure.
cPress the “ ” power button to turn the meter on.
dPress the “lux/fc” button to select the desired unit; lux
or fc.
ePress the “AVG” button to enter point illuminance value
average function.
fPress the “READ” button and the previous average
data is displayed.
gPress the and buttons to select the previous point
measured data as required.
hPress the “AVG” button to exit this mode.
5-3 Luminous intensity measurement
Luminous intensity is a light source property. Defined as
the quantity of luminous flux emitted uniformly into a solid
angle, the basic unit of luminous intensity is the candela,
equal to one lumen per steradian. To calculate luminous
intensity, the detector’s area and its distance from the light
source must be known.
1. Press the “ ” power button to turn the meter on.
2. Press the “lux/fc” button to select the desired units; lux or
fc.

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3. Remove the photo detector cap and place the detector so
the light falls squarely on the detector filter.
4. Press the “cd” button to enter luminous intensity
measurement mode and the annunciator “cd” is displayed,
The distance annunciator “m” or “ft” is also displayed,
together with the distance data previously set.
5. Press the “” and “” buttons to set the distance
between the “light center of lamp” and “measurement
base level”. The preset distance can be set between 0.01
to 30.47m, or 0.01 to 99.99ft. Luminous intensity
measurement should only be made in a dark room, or an
equivalent environment, where any light other than that
from the source being measured does not influence the
reading. To replicate a point light source as far as
possible to enable accurate measurements, the light
sensor should be set at a distance from the light source
which is at least 10 times the diameter of the source. i.e. if
the lamp whose intensity is to be measured is 50mm
diameter, the sensor should be placed at least 500mm
from the centre of the lamp.
6. Press the “cd” or “lux/fc” button to exit this mode.

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5-4 Manual data memory and read mode :
1. Clear the manually memorized data
cPress the “ ” button to turn the meter off.
dPress and hold down the "MEM" button, then press the
“ ” button to turn the meter on. When the LCD
shows "CLr", the memorized data has been erased.
2. Manual data memory
Each press of the "MEM" button will store one set of
readings to memory. The LCD will briefly show the
" M " mark and the memory address number. The total
number of memory locations available is 99.
3. Manual memory data READ
cPress the " READ " button to enter the READ mode. The
LCD will show the " R " mark and the memory address
number.
dPress the " " or " " button to select the desired
memory address number data for display.
ePress the " READ " button to exit this mode.

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5-5 Setting or disabling the auto power-off function
The meter enters sleep mode if no button is pressed
within the selected time period.
1. Setting the auto power-off time:
cPress the " " button to turn the meter off.
dPress and hold down the “AVG” button then press the
" " button to turn the meter on and enter auto power-
off time setting mode.
ePress “” and “” buttons to set the required auto
power-off time (0 to 127 minutes). If 0 minutes is
selected, the auto power-off function is disabled.
2. To disable auto power-off function for continuous operation:
cPress " " button to turn the meter off.
dPress and hold down the " HOLD " button, then press the
" " button to turn the meter on. The auto power-off
function will be disabled and the auto power-off mark
" " will not be visible.
Auto power-off is re-enabled the next time the instrument
power is turned on.
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6. . B BA AT TT TE ER RY Y C CH HE EC CK K- -U UP P ＆ ＆
R RE EP PL LA AC CE EM ME EN NT T
When the battery power is not sufficient to provide accurate
operation of the instrument, the LCD will display " +" to
indicate the batteries must be replaced.
1. Turn off the power to the meter. Release the screw
holding the battery cover in place on the rear of the case.

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2. Remove the all 6 exhausted cells and dispose of them in
accordance with local environmental regulations.
Replace the cells with qty. 6 new 1.5V AAA size cells,
observing the correct polarity as shown in the battery
compartment.
3. Refit the battery cover and tighten the screw.
4. Turn the instrument on and check the " +" is no longer
visible in the display and the instrument operates correctly.
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7. . S SP PE EC CT TR RA AL L S SE EN NS SI IT TI IV VI IT TY Y C CH HA AR RA AC CT TE ER RI IS ST TI IC CS S
•The detector used in this instrument together with the
incorporated filters, has a spectral sensitivity characteristic
very close to the C.I.E. (INTERNATIONAL COMMISSION
ON ILLUMINATION)photopic curve V(λ), as shown in
the following chart.
0
0.2
0.4
0.6
0.8
1
1.2
380 400 420 440 460 480 500 520 540 560 580 600 620 640 660 680 700 720 740 760 780
Wavelength in Nonometers
Relative Sensitivity (%)
0
0.2
0.4
0.6
0.8
1
1.2
Light Meter
CIE

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8. . M MA AI IN NT TE EN NA AN NC CE E
1. The white plastic disc on the top of the detector should
be cleaned with a damp cloth when necessary.
2. Do not store the instrument where temperature or
humidity is excessively high.
3. The reference level, as marked on the faceplate, is the
tip of the photo detector globe.
4. The calibration interval for the photo detector will vary
according to operational conditions, but generally the
sensitivity decreases in direct proportion to the product of
luminous intensity and the operational time. The
calibration accuracy may be enhanced by refitting the
sensor cover cap when the instrument is not in use. In
order to maintain the basic accuracy of the instrument,
periodic calibration is recommended.
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9. . R RE EC CO OM MM ME EN ND DE ED D I IL LL LU UM MI IN NA AT TI IO ON N L LE EV VE EL LS S
(1fc = 10.76 lux)
LOCATIONS lux fc
•OFFICE
Conference, Reception room. 200 ~ 750 18 ~ 70
Clerical work 700 ~ 1,500 65 ~ 140
Typing & drafting 1000 ~ 2,000 93 ~ 186

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•FACTORY
Visual work at production line 300 ~ 750 28 ~ 70
Inspection work 750 ~ 1,500 70 ~ 140
Electronic parts assembly line 1500 ~ 3,000 140 ~ 279
Packing work, Entrance passages 150 ~ 300 14 ~ 28
•HOTEL
Public room, Cloakroom 100 ~ 200 9 ~ 18
Reception 200 ~ 500 18 ~ 47
Cashier 750 ~ 1000 70 ~ 93
•STORE
Indoors stairs & corridor 150 ~ 200 14 ~ 18
Shop window, Packing table 750 ~ 1,500 70~140
Forefront of shop window 1500 ~ 3,000 140 ~279
•HOSPITAL
Sickroom, Warehouse 100 ~ 200 9 ~ 18
Medical examination room 300 ~ 750 28 ~ 70
Operating room
Emergency treatment area 750 ~ 1,500 70 ~ 140
•SCHOOL
Auditorium, Indoor gymnasium 100 ~ 300 9 ~ 28
Class room 200 ~ 750 18 ~ 70
Laboratory, Library, or Drafting
room
500 ~ 1,500 47 ~ 140