Lutron Electronics YK-2005LX User manual

200/2,000/20,000/100,000 Lux, LUX/Feet-candl
e
Real time data logger, 16000 Data logger no., RS232
LIGHT METER
Model : YK-2005LX

TABLE OF CONTENTS
1. FEATURES................................................................1
2. SPECIFICATIONS......................................................2
2-1 General Specifications..........................................2
2-2 Electrical Specifications........................................ 4
3. FRONT PANEL DESCRIPTION.....................................5
4. GENERAL MEASURING PROCEDURE...........................7
4-1 Light measurement..............................................7
4-2 Data Hold...........................................................
.
9
4-3 Data Record (Max., Min. reading)......................... 9
4-4 Data Logger........................................................10
5. ADVANCED ADJUSTMENT PROCEDURE......................
.
12
5-1 Check Memory Space...........................................13
5-2 Clear Memory......................................................14
5-3 Date/Time Setting...............................................
.
14
5-4 Sample Time Setting............................................14
5-5 Auto Power Off Default Setting.............................14
5-6 Unit Default Setting............................................ 15
5-7 Auto/Manual Default Setting............................... 15
5-8 Escape from the SETTING function.......................15
6. HOW TO SEND THE DATA OUT FROM THE METER.....
.
16
7. RS232 PC SERIAL INTERFACE...................................
.
19
8. BATTERY REPLACEMENT...........................................21
9. SYSTEM RESET.........................................................21
10. OPTIONAL ACCESSORIES........................................22
11. SPECTRUM of LIGHT SENSOR..................................23

1. FEATURES
* Wide range, 200/2,000/20,000/100,000 LUX.
* LUX & Foot Candle unit selection.
* Spectrum of photo sensor meets C.I.E..
* 4 kinds selection lighting type (Tungsten, Fluorescent,
Sodium or Mercury light ).
* Zero adjustment by push button.
* Auto range or manual range can be defaulted.
* Real time data logger, build in clock ( hour-min.-sec.,
year-month-date ).
* Auto or manual data record, 16,000 Data logger no.
* Wide sampling time adjustment range from two
seconds to 8 hours 59 minutes 59 seconds.
* RS232 computer interface.
* Can default auto power off or manual power off.
* Can default the display unit to LUX or Ft-cd.
* Super large LCD display with contrast adjustment for
best viewing angle.
* Data hold, record max. and min. reading.
* Microcomputer circuit provides special function & offer
high accuracy.
* Power by UM3 ( 1.5 V ) x 4 batteries or DC 9V adapter.
* RS232 PC serial interface.
* Separate probe, easy for operation of different
measurement environment.
1

2. SPECIFICATIONS
2-1 General Specifications
Circuit Custom one-chip of microprocessor LSI
circuit.
Display LCD size : 58 mm x 34 mm.
Measurement LUX, Feet candle ( Ft-cd )
Unit
Lighting Type Normal ( Tungsten ) light
Selection Fluorescent light
Sodium light
Mercury light
Light The exclusive photo diode & color
Sensor correction filter, spectrum designed to
Structure meet C. I. E.
Zero Adj. By push button.
Sampling Time Manual Push the data logger button
of Data Logger once will save data one time.
@
Set the sampling time to
0 second
Auto 2 sec to 8 hour 59 min. 59 sec.
Data Hold Freeze the display reading.
Memory Recall Maximum & Minimum value.
Power off Auto shut off saves battery life or
manual off by push button.
@
Can default auto power or manual
power off.
@
When default auto power function,
power will off automatically after
10 min., if no button be pressed.
2

Sampling Time Approx. 1 second.
of display
Data Output RS 232 PC serial interface.
Operating 0 to 50 .℃
Temperature
Operating Less than 80% R.H.
Humidity
Power Supply DC 1,5 V battery ( UM3 ) x 4 PCs,
* main instrument ( Heavy duty type ).
DC 9V adapter input.
@ AC/DC power adapter is optional.
Power Current Approx. DC 19.0 mA
Weight 406 g/ 0.89 LB. @ Battery is included.
Dimension Main instrument :
2000 x 762 x 368 mm
Light Sensor Probe :
85x55x12 mm(3.2x2.2x0.5 inch).
Accessories Instruction manual.....................
.
1 PC
Included Light sensor with protective
cover.........................................1 PC
Carrying case.............................
.
1 PC
Optional Type K thermocouple probe.
Accessories AC to DC 9V adapter.
RS232 cable, UPCB-02.
Data Acquisition software,SW-U801-WIN.
Data Logger software, SW-DL2005.
3

2-2 Electrical Specifications (23±5 )℃
Measureme
n
Range Max. In-range
Display
200 LUX 0 - 199.9 LUX
2,000 LUX 180 - 1,999 LUX
LUX 20,000 LUX 1,800 - 19,990 LUX
100,000 LUX 18,000 - 100,000 LUX
20 Ft-cd 0 - 18.6 Ft-cd
200 Ft-cd 16.7 - 186.0 Ft-cd
Feet-candle 2,000 Ft-cd 167 - 1,860 Ft-cd
10,000 Ft-cd 1,670 - 10,000 Ft-cd
Range Resolution Accuracy
200 LUX 0.1 LUX
2,000 LUX 1 LUX
20,000 LUX ( 2000x10 ) 10 LUX
100,000 LUX (1000x100 ) 100 LUX ± (4 %+2 dgt)
20 Ft-cd 0.01 Ft-cd
200 Ft-cd 0.1 Ft-cd
2,000 Ft-cd 1 Ft-cd
10,000 Ft-cd ( 1000x10) 10 Ft-cd
Note : Accuracy tested by a standard parallel light
tungsten lamp of 2856 K degree temperature.
@
Above specification tests under the environment RF
Field Strength less than 3 V/M & frequency less than
30 MHz only.
4

3. FRONT PANEL DESCRIPTION
5

3-1 Display
3-2 Power Button
3-3 HOLD Button ( ESC Button )
3-4 REC Button ( Enter Button )
3-5 SOURCE/ZERO ( Up Button▲
3-6 Range Button ( Down Button )▼
3-7 Send Button ( Clock Button )
3-8 SET Button ( Logger Button )
3-9 Stand
3-10 Battery Compartment/Cover
3-11 Tripod Fix Nut
3-12 LCD Brightness Adjust VR
3-13 System Reset Switch
3-14 RS-232 Output Terminal
3-15 DC 9V Power Adapter Input Socket
3-16 Probe Input Socket
3-17 Probe Plug
3-18 Light Sensor
3-19 Sensor Handle
3-20 Cover of Light Sensor
6

4. GENERAL MEASURING
PROCEDURE
The meter default function are following :
*The display unit is LUX.
*Auto range.
*Auto power off.
*The light type is Normal ( Tungsten ).
*The sampling time of data logger function is
2 seconds.
4-1 Light measurement
1)Install the " Probe Plug " ( 3-17, Fig. 1 ) into the
" Probe Input Socket " ( 3-16, Fig. 1 ).
2)Power on the meter by pressing the " Power Button "
( 3-2, Fig. 1 ). The display will show the " LUX " unit ,
at the same time the bottom display will show the
light type " Normal ( Tung. ) ".
Now the meter is ready for make the measurement.
3)Use the fingers to hold the " Sensor Handle " ( 3-19 ),
face the " Light Sensor " ( 3-18, Fig.1 ) against to the
measurement light source directly. The display
will show the light measurement value in LUX unit.
* If display show x 10 ( x 100 ) marker, then it
should multiply the display value by 10 ( 100 ).
7

Measurement Consideration
1)Light type selection
The light meter is calibrated under a precision
" Standard light tungsten incandescent source of 2856 K
degree ". Meter light type is selected is to " Normal (
Tungsten. ) " .
The meter default light type is Normal " Tung. "
type. For the general application, it is not
necessary to change the light type selection to
any other type.
If intend to make precision measurements under
a different light source from :
MERCURY LIGHT
FLUORESCENT LIGHT
SODIUM LIGHT
It can press the " Light Source Button " ( 3-5, Fig. 1 )
to select the desired light type , the light type name
will present on the lower display. When set the different
light type beyond the " Normal ( Tungsten ) ", the
system will automatically multiply a minor correction
factor to make the compensation precisely.
For the unknown light type, just select the light
type to Normal ( Tung. ) "
8

2)If intend to change the display unit from LUX to Ft-cd
( feet candle ), please refer page 15, chapter 5-6 ( Unit
Default Setting )
3)The meter is defaulted to auto range function.
However if intend to use the meter under manual
range, please refer page 15, chapter 5-7
( Auto/Manual Default Setting )
For the manual range operation, press the " RANGE
Button " ( 3-6, Fig. 1 ) will change the range.
* If the display shows " ", it indicates an
overload condition, select the next higher range.
* If the display shows " ", it indicates an
out-of-range, select the next lower range.
4)Zero adjustment :
If blank the Light Sensor ( 3-18, Fig. 1 ) by " Sensor
Cover " ( 3-20 , Fig. 1 ), the dsiplay not show zero
value, press the " ZERO Button " ( 3-5, Fig. 1 ) display
will show zero value. Upon completion, remove the
sensor cover.
4-2 Data Hold
D
u
Press the " Hold Button " once again will release the data
Fi
g
hold function.
display a " HOLD " symbol.
4-3 Data Record ( Max., Min. reading )
* The data record function records the maximum and
minimum readings. Press the " REC Button " ( 3-4, Fig.
* 1 ) once to start the Data Record function and there
will be a " REC. " symbol on the display.
9

* With the " REC. " symbol on the display :
a)Press the " REC Button " ( 3-4, Fig. 1 ) once, the "
REC. MAX. " symbol along with the maximum value
will appear on the display.
If intend to delete the maximum value, just press
the " Hold Button " ( 3-3, Fig. 1 ) once, then the
display will show the " REC. " symbol only & execute
the memory function continuously.
b)Press the " REC Button " ( 3-4, Fig. 1 ) again, the
" REC. MIN. " symbol along with the minimum value
will appear on the display.
If intend to delete the minimum value, just press
the " Hold Button " ( 3-3, Fig. 1 ) once, then
the display will show the " REC. " symbol only &
execute the memory function continuously.
c)To exit the memory record function, just press the
" REC " button for 2 seconds at least. The display will
revert to the current reading.
4-4 Data Logger
The data logger function can save 16,000 measuring
data with the clock time ( Real time data logger, build
in clock ( hour-min.-sec., year-month-date ).
The data logger procedures are as following :
a)If push the Logger Button " ( 3-8, Fig. 1 ) once will
show the sampling time value on the bottom left
display then disappeared.
b)Press the " REC Button " ( 3-4, Fig. 1 ) once to
start the Data Record function and there will be a
" REC. " symbol on the display.
10

c)Auto Data Logger ( Sampling time set from
2 seconds to 8 hours 59 minutes 59 seconds )
Press the " Logger Button " ( 3-8, Fig. 1 ) once to start
the Auto Data Logger function, at the same the
bottom right display will show the indicator
" Recording.... ", now the Data Logger function is
executed. The upper display will show " DATA "
indicator along with " REC " marker.
d)Manual Data Logger ( Sampling time set to 0
second )
Press the " Logger Button " ( 3-8, Fig. 1 ) once will
save the data one time into the memory, at the same
time the bottom right display will show the indicator
" Recording.... " a while. Now the Data logger function is
executed. The upper display will show " DATA "
indicator along with " REC " marker.
e)Memory full
Under execute the data logger, if the bottom right
display show the " Full ", it indicate the memory data
already over 16,000 no. and the memory is full.
f) During the Data Logger function is executed, press the "
Logger Button " ( 3-8, Fig. 1 ) once will stop to execute
the data logger function, the " DATA " indicator
will be disappeared.
If press the " Logger Button " ( 3-8, Fig. 1 ) once again
will continuous the Data Logger function.
11

Remark :
1) If intend to change the data logger sampling time,
please refer chapter 5-4.
2) If intend to know the space of balance data numbers
into the memory IC, please refer chapter 5-1.
3) If intend to clear the saving data from the memory
please refer chapter 5-2.
5. ADVANCED ADJUSTMENT
PROCEDURES
When execute the following Advanced
Adjustment Procedures should cancel the " Hold
function " and the " Record function " first. The
display will not show the " HOLD " and the " REC "
marker.
a.Press the " SET Button " ( 3-8, Fig. 1 ) at least two
seconds until the lower display show
XXXXX Memory Space
If push the " ESC Button " ( 3-3, Fig. 1 ) will escape
the selecting function and return to the normal
*measuring display.
12

b.One by one to press the " Set Button " ( 3-8, Fig. 1 )
once a while to select the ten main function, at the
same time lower display will show on the lower
display will show on the lower display as :
Memory Space
Clear Memory
Date/Time Set
Sample Time
Auto Power Off
Temp. Unit
Auto/Manual Set
ESC Finish→
c. When make Advanced Adjustment Procedure
will use the following key buttons :
ESC Button ( 3-3, Fig. 1 ), Enter Button ( 3-4, Fig. 1 )
Up Button ( 3-5, Fig. 1 ), Down Button ( 3-6, Fig. 1 )▲▼
SET Button ( 3-8, Fig. 1 ), SEND Button ( 3-7, Fig. 1 )
5-1 Check Memory Space
To check the balance data numbers that exist into the
memory ( allow memorize data no. ).
XXXXX Memory Space
@XXXXX is the balance data numbers, for example
XXXXX=15417.
13

5-2 Clear Memory
* To delete the existing save data numbers from the
memory.
* Push ENTER Button once, then push ENTER Button
to confirm.
* Press the ESC Button once to quite and return to
the main measurement manual.
5-3 Date/Time Setting
* Use Up Button, Down Button and▲▼
Enter ( ) Button to select the expect Date→
( year-month-date ) and the time (HOUR-MIN.-SEC.).
* After finish the Date/Time adjustment,
Push the " Enter Button " , then press the " ESC Button "
will quite and save the clock data into the memory.
5-4 Sample Time Setting
* Use Up Button, Down Button and Enter ( )▲▼ →
Button to select the expect Sample Time ( HOUR-MIN.-SEC.).
* After finish the Sample Time adjustment,
Push the " Enter Button " , then press the " ESC Button "
will quite and save the clock data into the memory.
5-5 Auto Power Off Default Setting
* Use Up Button, Down Button to select " 1 " or▲▼
" 0 ".
1 = Auto power On.
0 = Auto power Off.
14

* After finish the Auto Power Off adjustment,
push the " Enter Button " , then press the " ESC Button "
will quite and return to the normal measurement
display.
5-6 Unit Default Setting
* Use Up Button, Down Button to select the▲▼
default unit as : LUX, Ft-cd ( Feet candle )
* After finish the unit adjustment,
push the " Enter Button " , then press the " ESC Button "
will quite and return to the normal measurement
display.
5-7 Auto/Manual Setting
* Use Up Button, Down Button to select " 1 " or▲▼
" 0 ".
1 = Auto range
0 = Manual range
* After finish the Auto Power Off adjustment,
push the " Enter Button " , then press the " ESC Button "
will quite and return to the normal measurement
5-8 Escape from the SETTING function
Press the " ESC Button " once a while will quite and
return to the normal measurement display.
15

6. HOW TO SEND THE DATA OUT
FROM THE METER
1)If intend to send the data out from the meter, it
should cancel the " Hold function " and the " Record
function " first. The display will not show the " HOLD "
and the " REC " marker.
2)Press the " SEND Button " ( 3-7, Fig. 1 ) at least 2
seconds until the bottom right display show " Transmit
mode ", then release the button.
LCD display will show the fowling screen
alternately. 314 1
←
LUX →LUX
1 Transmit mode xx:xx:xx Transmit mode
Block no. The first Start time Start data
data of of each address of
each block block each block
Use Up Button, Down Button to select the▲▼
different data memory block no. ( 1 to 250 ).
16

The meter can save 16,000 data max. , those
data will saved into 250 memory block max.
*The data that save into one routine Data Logger
procedures ( Push " REC " button , following push
the " Logger " button to save the data, the display
will show the " REC " and " DATA " . After save the
data push the " Logger " button, following push
the " REC " button, will exist the Data Logger
function. The " REC " and " DATA " indicator of LCD
will be disappeared ). Please refer Chapter 4-6,
page 12.
Block 1 Data 1
to
Data X
↓
Block 2 Data X+1
to
Data Y
↓
..................
..................
↓
Block 250 Data Z
to
Data 16,000
17

3)Until the desired Memory Block no. be selected.
Push the " Send Button " ( 3-7, Fig. 1 ) once, the
data in the Memory Block will send out.
During the data send out, the bottom right display will
show the " Sending Data ! " indicator. When data
already send out completely, the bottom right display
will show the Transmit mode " indicator again.
5)Push the " ESC Button " ( 3-3, Fig. 1 ) will exist
the data sending function and return to the normal
display.
Remarks :
@
If intend up load the data to the computer,
then should connect the RS232 cable
( optional, model : UPCB-02) and apply the
Data Logger software ( optional, Model :
SW-DL2005 ).
@
When sending the data, each time just can
send one Memory Block data out. for example
block 1 data, block 2 data... or block 250 data.
18