RS PRO RS-137 User manual

Instruction Manual
RS-137
146-4653
Luminance Meter
FREN IT
A/B B-A%A
kcd/m2·h
kfL·h
REF
CMP
ACC
USB
T-H
R-H
SET
REC

Luminance Meter / EN
09/15/17 Version No. 00
CONTENTS
Title Page
1. INSTRUCTION..............................................................................................................1
2. FEATURES & APPLICATION....................................................................................1
3. SPECIFICATIONS........................................................................................................3
4. PARTS & CONTROLS ................................................................................................4
4-1 Description of Parts & Control keys..............................................................4
4-2 Description of Display...................................................................................7
5. OPERATING INSTRUCTIONS...................................................................................9
5-1 Selecting Luminance Unit cd/m
2
or fL...........................................................9
5-2 Luminance Measurement.............................................................................9
5-3 Maximum & Minimum Reading Measurement ...........................................11
5-4 Point Average Measurement......................................................................12
5-5 Reference Quantity Measurement ( A/B %A B-A )..................................12
5-6 Making Relative Measurement...................................................................14
5-7 Using Comparator Function........................................................................15
5-8 Using Accumulated Luminance Function...................................................17
5-9 Setting the Calibration Factor (CAF) ..........................................................18
5-10 Setting the Color Correction Factor (CCF)...............................................18
5-11 Setting the Auto Power Off Time..............................................................19
5-12 Setting the Backlight Timeout...................................................................20
5-13 Setting the Real-Time...............................................................................20
5-14 Auto Datalogging......................................................................................21
5-15 Auto-Cycle Timer Datalogging..................................................................22
5-16 No-Cycle Timer Datalogging ....................................................................24
6. BATTERY CHECK-UP & REPLACEMENT...........................................................27
7. SPECTRAL SENSITIVITY CHARACTERISTIC....................................................27
8. MAINTENANCE..........................................................................................................28
9. SOFTWARE INSTALLATION AND OPERATION ................................................28

Luminance Meter / EN
09/15/17 Version No. 00 1
1. INSTRUCTION
The digital Luminance meter is a precision instrument used to measure
Luminance in candles per square meter (cd/m
2
) or foot-Lamberts (fL) in the
field.
It meets CIE photopic spectral response, f ’
1
≦6%.
The Luminance meter is compact, tough and easy to handle owing to its
construction.
The light sensitive component used in the meter is a very stable, long-life
silicone photo diode and spectral response filter.
Fullyfunctional for professional requirements.
U.S. Pat. No. Des. 446,135
2. FEATURES & APPLICATION
Dual Display, 4-digit LCD reading
Spectral Sensitivity close to CIE photopic Curve
MeasuringLevelsRanging0.001to1999k cd/m
2
,0.001 to 580.0k fL, Autoranging 7
step
Accurate and Instant response
Luminance ratio A/B, deviation %A, different B-A and peak luminance
measurements
User calibration factor and color-correction functions
Accumulation luminance measurement
Max/Min/AVG function
Backlit function
Comparator function
Auto power off function
Data Hold function
Data memory and read function
Data logger function
USB Interface

Luminance Meter / EN
2 09/15/17 Version No. 00
Applications:
The Luminance meter is a handy, easyto use and precision measuring instrument.
It allows the accurate measurement of the luminance in cd/m
2
or fL.
1 cd/m
2
= 0.2919 fL = 0.0929 cd/ft
2
1 fL = 3.426 cd/m
2
= 0.3183 cd/ft
2
1 cd/ft
2
= 10.76 cd/m
2
= 3.142 fL
Contact Measurements
Placed directly on the surface to be measured:
Suitable for measuring
•monitors
•television screens
•light boxed
•light displays
Measuring at a Distance
The measuring angle being 2 degree.
Suitable for measuring
•monitors taking the existing ambient light into consideration
•lighting of streets areas
•lighting of sports areas
•lighting contrasts at work stations
•lighting in museums
•uniform illumination of projection screens

Luminance Meter / EN
09/15/17 Version No. 00 3
3. SPECIFICATIONS
Display: Dual display 4 digit LCD read out.
Measuring Range: 9.999, 99.99, 999.9, 9.999k, 99.99k, 999.9k, 1999k cd/m
2
9.999, 99.99, 999.9, 9.999k, 99.99k, 580.0k fL
Auto ranging (7 step) (1 fL = 3.426 cd/m
2
)
Measuring Angle: 2°
Overrange Display: OL is displayed
Resolution: 0.001 cd/m
2
, 0.001 fL
Accuracy: ±3%rdg±5dgt on all ranges except 9.999 and 99.99 ranges is
±10%rdg±10dgt.
(Calibrated to standard incandescent lamp, 2856°Κ, at 25℃ / 77℉)
CIE Photopic f ’
1
: ≦6%
Temperature Characteristics: ±0.1% /
℃
Measuring Rate: Approximately 5 time/sec
Photosensor: Silicon photodiodes
Data Memory Capacity: 200 sets. (Direct reading from LCD display)
Data Logger Capacity: microSD CARD 4GB
Operating / Storage Conditions: 0℃to 50℃<80% RH / -10℃to 60℃<70%RH
Power Source: 6 pcs 1.5V AAA size Battery
Battery Life (typical): 50 hours
Photosensor Lead Length: 90 cm (approx.)
Photosensor Dimensions: 40φ×158(L)mm
Dimension: 150(L) ×72(W) ×35(H)mm
Weight: Meter: 235g
Photosensor: 210g
Accessories: Carrying case, Instruction manual, Battery, CD software,
USB cable.
Option Accessories: AC adaptor 9VDC 100mA.

Luminance Meter / EN
4 09/15/17 Version No. 00
4. PARTS & CONTROLS
4-1 Description of Parts & Control keys
A/B B-A%A
kcd/m2·h
kfL·h
REF
CMP
ACC
USB
T-H
R-H
SET
REC
19
4
13
11
12
7
9
10
1
2
5
6
8
18
16
17
1514
3
1. LCD Display: 4 digit display with a maximum of 9999 readings and the
indicating signs of measured values, unit function symbols and
decimal points etc. are displayed.
2. Power Control key:
Press one time to turn on the meter.
Press this key for 3 seconds to turn off the meter.
3. RANGE key:
Press this key one time to enter the manual range mode. Shows
“ R-H ”on LCD.
Press this key again to select the desired range.
Press this key for 3 seconds to return to auto ranging mode.

Luminance Meter / EN
09/15/17 Version No. 00 5
4. key:
1Backlight function key, press this key to turn on and off the backlight will
switch off automatically after the backlight setting time.
2Press this key for 3 seconds to disable the auto backlight timeout.
5. MX/MN key:
MAX MIN Recording Mode:Press this keytoenterthis recording mode.
Press this key to circulate the reading of Current, Maximum, Minimum,
Maximum-Minimum, and Average.Press this key3 seconds to exit this mode.
6. SET key: Press this key to enter the setting mode.
Press this key for 3 seconds to exit this mode.
SET01 : Measurement unit cd/m
2
or fL setting mode.
SET02 : Real time setting mode.
SET03 : Comparator High/Lowvalue setting mode.
SET04 : User calibration factor value setting mode.
SET05 : Color-correction factor value setting mode.
SET06 : Accumulate luminance measurement on-off setting mode.
SET07 : Auto datalogging interval time setting mode.
SET08 : No-cycle timer datalogging setting mode.
SET09 : Auto-cycle timer datalogging setting mode.
SET10 : Auto power off time setting mode.
SET11 : Backlight time setting mode.
SET12 : Clear the manual memorized data.
SET13 : Clear the auto memorized data.
7. H / AVG key:
1H HOLD key: Press this key momentarily to freeze or unfreeze the
displayed reading.
2AVG key: Press this key for 3 seconds to enter or exit point average
measurement function.
8. △ / %key:
1Reference quantity measurement mode ( A/B %A B-A ).
Press this key to enter this mode, press this key for 3 seconds to exit this
mode.
2Relative & percent measurement mode (△,%). Press this key for 3 seconds
to enter or exit this mode.
9. ↵key:
1Store the displayed setting value or exit a setting mode.
2Recall the CAF, CCF or other for use in measurement.

Luminance Meter / EN
6 09/15/17 Version No. 00
10. / CMP key:
1Time key: Press this key to switch the display of hour : minute : second,
year I month I day and exit. The real time will be displayed if
the real time setting function was performed, otherwise the
elapsed time will be displayed.
2CMP key:Press thiskeyfor 3 seconds to enter or exit thecomparator mode.
11. ⊳MEM key:
1⊳key: In the setting mode, press this key move flashing cursor to left.
2MEM key: a). Memory function: Press this key one time to store a
measuring value.
b).Press this keyfor 3 seconds to enter or exit the datalogging
mode.
12.
A
,
B
key:
1△▽key:In the setting mode, press this key to increase, decrease the
displayed setting.
In the READ mode, press this key to increase/decrease the
memory location.
2A, B key: In the reference quantity measurement mode (A/B %A B-A),
press
A
key to acquire measured value A is used as a reference
value. Press
B
key to acquire measured value B then the
calculated value A/B, %A or B-A can be displayed by pressing the
△/% key.
13. READ key:
1key: In the setting mode, press this key move flashing cursor to right.
2READ key:
Read function: Press this key to enter the READ mode, then
press △or ▽key to select the desired stored
number of data to read. Press this key again to
exit.
14. AC adaptor socket (9V, 100mA).
15. USB cable interface : PC interface connector.
16. Photo Detector.
17. Tripod mounting: 1/4”-20 unc female thread.
18. Photo Detector Cap.
19. microSD CARD 4GB.

Luminance Meter / EN
09/15/17 Version No. 00 7
4-2 Description of Display
A/B B-A%A
kcd/m2·h
kfL·h
REF
CMP
ACC
USB
T-H
R-H
SET
REC
: Auto power off indication.
R-H : Manual range indication.
REC :Recording mode indication & current reading.
REC MX :Maximum reading.
REC MN :Minimum reading.
REC MX-MN : (Maximum – Minimum) value.
REC AVG :(
2MinimumMaximum
+
) value.
H : Data hold mode.
REF : Setting reference value or reference value displayed.
ACC : Accumulated luminance measurement mode indication.
CMP : Comparator mode indication.
: Comparator high limit value is exceeded or setting indication.
: Comparator low limit value is lowered or setting indication.
A: Acquire measured value A is used as a reference value for the reference
quantity measurement mode indication.
B: Acquire measured value B for the reference quantity measurement mode
indication.
cd/m
2
,kcd/m
2
, fL , kfL : Luminance unit of measure.
cd/m
2
.h, kcd/m
2
.h, fL.h , kfL.h : Accumulated luminance unit of measure.
: Battery capacity indication.
: Low battery indication.

Luminance Meter / EN
8 09/15/17 Version No. 00
ZERO : Zero adjustment indication.
CAF : Calibration factor indication.
CCF : Color correction factor indication.
T-H : Preset start/stop time datalogging mode indication.
SET : Setting mode indication.
CYCLE : Auto-cycle timer datalogging mode indication.
: The number of accumulated luminance maximum indication
value 9999k is exceeded indication.
A : Datalogging mode indication.
M : Displays one time store one sets data into the memory.
: Manual memory address number indication.
R : Read mode indication.
: Recall manual memory adress number indication.
AVG : Point average mode indication.
: Point average number indication.
A/B : Ratio mode indication (
B
A
)
%A : Percentage deviation mode indication (
AA-B
x 100%)
B-A : Difference mode indication (B – A)
USB : PC communication indication.
△: Relative mode indication (Present value – Reference value).
%: Percent mode indication (
valueReference
valuePresent
x 100%).
: : h:m:s : Indicates the elapsed time or the real time
(hour:minute:seconds).
: : Y IMI D : Indicates the elapsed date or the real date (year ImonthI
day).
INTV : Datalogging interval time indication.

Luminance Meter / EN
09/15/17 Version No. 00 9
5. OPERATING INSTRUCTIONS
Zero Adjustment
The meter performs zero adjustment automatically when the power
comes on. This adjustment need to attach the photo detector cap.
5-1 Selecting Luminance Unit cd/m
2
or fL
1. Press the key to turn on the meter.
2. Press SET key, the annunciator “SET 01” is displayed.
3. Press △key to select “cd/m
2
” unit or press ▽key to select “fL” unit.
4. Press ↵key to store the desired measure unit.
fL
SET
cd/m2
5-2 Luminance Measurement
1. Press the key to turn on the meter.
2. Remove the photo detector cap and face it align to the point to be measured
field.
3. Read the luminance value from the LCD display.
4. Press Hkey, if the displayed value need to be hold. Press Hkey again to
exit the data hold mode.
5. Press ↵key to view CAF and CCF values for use in measurement.
6. Press key to display the time or date.
cd/m2

Luminance Meter / EN
10 09/15/17 Version No. 00
7. Manual data memoryand read operations
To clear the manual memorized data
a). Press SET key 12 times to change the setting mode to “SET 12”, the
annunciator “M CLr1 no” is displayed.
b). Press △key to select “YES” or press ▽key to select “NO” , then
press ↵key to exit.
If you select “YES” the memorized data will be cleared.
SET
To memorize the reading
a).Press MEM key each time will store one set of the measured value to the
memory. At this moment, LCD willshowthe “ M” mark and the memory
address number. Total memorysize is 200 sets.
b). When the memoryis full, LCD will show “ MFULL” mark.
To recallthe memorize data
a). Press READ key to enter the READ mode, the LCD will show “ R” mark
and the memory address number.
b).Press △or ▽key to select the desired memory address number data
for display.
c). Press ↵keyto view CAF and CCF values for use in measurement.
d). Press keyto displaythe stored time or date.
e). Press READ keyagain to exit.

Luminance Meter / EN
09/15/17 Version No. 00 11
cd/m2
5-3 Maximum & Minimum Reading Measurement
1. Press the key to turn on the meter.
2. Remove the photo detector cap and face it align to the point to be
measured field.
3. Press MX/MN keyto enter the recording mode. The maximum, minimum,
and average values are then reset to the present reading, LCD shows
“ REC ” mark and the auto power off function is disabled.
4. Press MX/MN keyto cycle switch displaying the
Maximum ( REC MX ) reading with its recorded time.
Minimum ( REC MN ) reading with its recorded time.
Maximum–Minimum( REC MX-MN ) value with time difference between them.
Average ( REC AVG ) value with the recording elapsed time.
Current ( REC ) reading with current time.
5. Press keyto display the date and time of recorded data. The real time will
be displayed, if the real-time setting function was performed, otherwise the
elapsed time will be displayed.
6 Press ↵keyto viewCAF and CCF values for use in measurement.
7. Press Hkey to paused recording, the “H” symbol is displayed, press Hkey
again will resume recording.
8. Press MX/MN key for 3 seconds to exit.
REC
cd/m2

Luminance Meter / EN
12 09/15/17 Version No. 00
5-4 Point Average Measurement
1. Press the key to turn on the meter.
2. Remove the photo detector cap and face it align to the point to be
measured field.
3. Press AVG keyfor 3seconds to enter this mode, LCD shows “ AVG Noxxx ”
the last time point average memorized data.
4. Press ↵key for 3 seconds to clear the last time point average memorize data,
LCD shows “ AVG No 000 ” number.
5. Press MEM keyeach time will store one measured point value into memory.
The memorized address number “ AVG No.xxx ” is displayed. The maximum
measurement is 200 points.
6. When the measurement is pause or completed, press MX/MN key to switch
displaying the measured points:
Maximum (MX) reading with its address number 
Minimum (MN) reading with its address number 
Maximum – Minimum (MX – MN) value 
Average (AVG) value (all point average value) with all point number exit.
It is also possible to press READ key to enter the READ mode [refer to
5-2-7-].
7. Press AVG keyfor 3 seconds to exit this mode.
cd/m2
5-5 Reference Quantity Measurement ( A/B %A B-A )
1. Press the key to turn on the meter.
2. Press △/% key to enter this mode, LCD shows “A” mark.
3. Remove the photo detector cap and face it align to the point to be
measured field.
4. Press
A
key to acquire measured value A is used as a reference value for
the following functions.

Luminance Meter / EN
09/15/17 Version No. 00 13
5. Now the photo detector align to the second point.
6. Press
B
key to acquire measured value B, the calculated value for the
respective function appears at the display.
7. Press △/% key to display the calculated value A/B, %A or A-B.
8. Repeat step 5 to 7 for the other point measurement.
9. Press ↵key to view CAF, CCF, A and B values.
10. Press △/% key for 3 seconds to exit.
cd/m2 cd/m2
Value A
current measured value Value B
%A
cd/m2
A/B
cd/m2
Key Key
cd/m2
B-A
cd/m2
Key Key

Luminance Meter / EN
14 09/15/17 Version No. 00
Note:
Ratio A/B: This function is used, for example, for contrast measurements and
luminance distribution at workstations.
Percentage Deviation %A: This function is used, for example, for testing
monitor screen uniformity (percentage deviation of
screen corners from the reference value at the
middle of the screen).
Difference A-B: This function is used, for example, for detecting deviations in
manufacturing (read the difference between reference value A
and the second measured value B directly from the display).
5-6 Making Relative Measurement
The meter display calculated values that are based on a stored reference
value.
5-6-1 Use the current measured value as the reference value.
1. Press △/% key for 3 seconds to store the reference value and enter the
relative mode. The “△” mark and indicates the difference between the
present measurement and the reference value are displayed.
2. Press △/% key again to enter the percent mode. The “%” mark and the
calculated value are displayed.
3. Press ↵keyto view the reference REF, CAF and CCF values.
4. Press △/% key for 3 seconds to exit.
cd/m2
5-6-2 Use the setting value as the reference value
1. Setting the reference value
Press and hold down △key, then press △/% key to enter the reference
value setting mode, the annunciator “REF” andthe flicking decimal point
are displayed.

Luminance Meter / EN
09/15/17 Version No. 00 15
Press △or ▽key to set to the desired decimal point position.
When the three decimal points are flicking means no decimal point is
need.
Press key and move to the flicking of unit. Press △key to select “K” or
press ▽key key to delete “K”.
Press key and move to the flicking first number of the value.
Press △or ▽key to set the desired number.
Repeat step for the other three number of the value setting.
Press ↵key to store the reference value setting and exit.
2. The annunciator “△” and indicates the difference between the present
measurement and the reference value are displayed.
3. Press △/% key again to enter the percent mode. The “%” mark and the
calculated value are displayed.
4. Press ↵keyto view the reference REF, CAF and CCF values.
5. Press △/% key for 3 seconds to exit
cd/m2
REF
cd/m2
5-7 Using Comparator Function
The comparator function compares the measured value with preset High ()
and Low () limit values.
5-7-1 Setting the comparator
1. Press SET key 3 times to change the setting mode to “ SET 03 ” and to enter
the comparator High limit value setting mode, the annunciator “ CMP ”
and the flicking decimal point are displayed.
2. Press △or ▽key to set to the desired decimal point position.
When the three decimal point are flicking means no decimal point is need.
3. Press key and move to the flicking of unit. Press △key to select “K” or
press ▽key to delete “K”.
4. Press key and move to the flicking first number of the value.
Press △or ▽key to set the desired number.

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16 09/15/17 Version No. 00
5. Repeat step 4 for the other three number of the value setting.
6. Press ↵key to store the High limit value setting and to enter the Low limit
valuesettingmode,theannunciator“ CMP ” and the flicking decimal point
are displayed.
7. Repeat step 2 to 5 to setting the desired Low limit value.
8. Press ↵key to store the setting and exit.
kcd/m2
CMP
SET
5-7-2 Comparator operation
1. Press CMP key for 3 seconds to enter the comparator function. The
annunciator “ CMP ” is displayed.
2. If the measured value exceeds the setting value, the annunciator or will
be displayed and the beeper will sound.
3. Press CMP key to exit this function.
kcd/m2
CMP

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09/15/17 Version No. 00 17
5-8 Using Accumulated Luminance Function
1. Press SET key 6 times to change the setting mode to “ SET 06 ”, the
annunciator “ ACC ” and the “OFF” mark flicking are displayed.
ACC
SET
2. Press △key to select “On”.
3. Press ↵key to start the accumulated luminance measurement function, the
luminance unit “.h” mark is displayed and the measurement elapsed time is
started. The maximum accumulation time is 9999 hours (approx. 1.2 years).
In this function the auto power off function is disabled.
4. During measurement, press Hkey can be used to pause and resume the
measurement.
5. During measurement, press key to view the measurement elapsed time
h:m:s and Y IMI D.
6. The maximum indication of accumulated luminance value is 9999K. When
this value is exceed, the number of accumulated can be checked by
annunciator “CYCLE No.xxx”. The maximum number of CYCLE is up to
999.
7. Press ↵key to stop this measurement.
Press key to viewthe total measurement elapsed time h:m:s and Y IMI D.
Press ↵key again to exit this measurement.
kcd/m2·h
ACC

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18 09/15/17 Version No. 00
5-9 Setting the Calibration Factor (CAF)
The CAF allows the user to calibrate the meter to anysubject desired. It can be
used to calibrate the meter to another standard subject for which the luminance
is known, to preciselystandardize meters to the same subject.
1. Press SET key 4 times to change the setting mode to “SET 04”, the
annunciator “CAF” and “On” or “OFF” are displayed.
2. Press △key to select “On” or press ▽key to select “OFF”.
3. If select “OFF” then press “” key to use factory default value “1.000” is
displayed. Press ↵key to exit
4. If select “On” then press key to enter CAF setting mode, the calibration
preset data is flicking displayed.
5.Removethe photo detector cap and face it align to the standard subject, until
the meter reading is stable.
6. Press △and ▽key to change the CAF values until the luminance value is
same as the standard subject value. The CAF can be set between 0.001 to
9.999.
7. Press ↵key to store the user CAF value and exit.
cd/m2
SET
cd/m2
SET
5-10 Setting the Color Correction Factor (CCF)
The CCF can be used to adjust the spectral response of the meter to more
accurately measure subjects with color greatly different than the calibration
standard. CCF are normally determined based on measurements using a
spectrophotometer.
1. Press SET key 5 times to change the setting mode to “SET 05”, the
annunciator “CCF” and “On” or “OFF” are displayed.
2. Press △key to select “On” or press ▽key to select “OFF”.
3. If select “OFF” then press key to use factory default value “1.000” is
displayed. Press ↵key to exit
4. If select “On” then press key to enter CCF setting mode, the calibration
preset data is flicking displayed.