Lutron Electronics SL-4023SD User manual

SD card real time data Recorder, USB/RS232
SOUND LEVEL METER
Model : SL-4023SD
Your purchase of this
SOUND LEVEL METE
R
with SD CARD DATA
RECORDER 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.....................................................................2
3. FRONT PANEL DESCRIPTION....................................................6
3-1 Display..............................................................................6
3-2 Power Button ( ESC, Backli
g
ht Button )................................6
3-3 Hold Button ( Next Button )................................................
.
6
3-4 REC Button ( Enter Button )...............................................6
3-5 Ran
g
e Button ( Button, Time Check Button )...................▲6
3-6 A/C Button ( Button, Samplin
g
check Button )..................▼6
3-7 Fast/Slow Button ( SET Button ).........................................6
3-8 Peak Hold Button ( Lo
gg
er Button ).....................................6
3-9 Microphone.......................................................................
.
6
3-10 AC output terminal...........................................................6
3-11 Calibration VR..................................................................6
3-12 RS-232 output terminal.....................................................6
3-13 DC 9V adapter socket.......................................................6
3-14 Tripod Fix Nut..................................................................6
3-15 Battery Cover Screws.......................................................
.
6
3-16 Stand..............................................................................6
3-17 Battery compartment/Cover..............................................
.
6
3-18 SD card socket.................................................................6
4. MEASURING PROCEDURE.........................................................7
5. DATALOGGER..........................................................................9
5-1 Preparation before execute datalo
gg
er function....................9
5-2 Auto Datalo
gg
er ( Set samplin
g
time 1 second )..............≧10
5-3 Manual Datalo
gg
er ( Set samplin
g
time = 0 second )...........
.
11
5-4 Check time information.......................................................12
5-5 Check samplin
g
time information.........................................12
5-6 SD Card Data structure.......................................................12
6. Savin
g
data from the SD card to the computer........................... 14
7. ADVANCED SETTING................................................................15
7-1 Set clock time ( Year/Month/Date, Hour/Minute/ Second ).....16
7-2 Decimal point of SD card settin
g
..........................................17
7-3 Auto power OFF mana
g
ement ............................................17
7-4 Set beeper Sound ON/OFF..................................................18
7-5 Set samplin
g
time .............................................................
.
18
7-6 SD memory card format.....................................................
.
19
8. POWER SUPPLY from DC ADAPTER...........................................
.
19
9. BATTERY REPLACEMENT..........................................................19
10. RS232 PC serial interface........................................................20
11CALIBRATION .........................................................................21
12. FREQUENCY WEIGHTING CHARACTERISTICS
OF A & C NETWORKS.............................................................22
13. TIME WEIGHTING (FAST & SLOW)
CHARACTERISTICS................................................................22
14. PATENT.................................................................................23

1. FEATURES
* Main functions are designed to meet IEC 61672 class 2.
* A & C weighting networks comply with standards.
* 0.5" standard microphone head.
* Time weighting (Fast & Slow) dynamic characteristic
modes.
* Build External calibration VR.
* Auto range & Manual range selection.
* Available for external calibration adjustment.
* Condenser microphone for high accuracy & long-term
stability.
* Memory function to store the Max. & Min. value.
* Hold and Peak Hold functions.
* Real time SD memory card Datalogger, it Built-in Clock
and Calendar, real time data recorder, sampling time set
from 1 second to 3600 seconds.
* Manual datalogger is available ( set the sampling
time to 0 second ), during execute the manual datalogger
function, it can set the different position ( location ) No.
( position 1 to position 99 ).
* Innovation and easy operation, computer is not need to
setup extra software, after execute datalogger, just take
away the SD card from the meter and plug in the SD card
into the computer, it can download the all the measured
value with the time information ( year/month/date/
hour/minute/second ) to the Excel directly, then user can
make the further data or graphic analysis by themselves.
* SD card capacity : 1 GB to 16 GB.
* LCD with green light backlight, easy reading.
* Can default auto power off or manual power off.
* Data hold, record max. and min. reading.
* Microcomputer circuit, high accuracy.
* Power by UM3/AA ( 1.5 V ) x 6 batteries or DC 9V adapter.
* RS232/USB PC COMPUTER interface.
* Heavy duty & compact housing case.
1

2. SPECIFICATIONS
Circuit Custom one-chip of microprocessor LSI
circuit.
Display LCD size : 52 mm x 38 mm
LCD with green backlight ( ON/OFF ).
Measurement 30 - 130 dB.
Range
Resolution 0.1 dB.
Function dB ( A & C frequency weighting ),
Time weighting ( Fast, Slow ),
Peak hold, Data hold
Record ( Max., Min. ).
Accuracy Characteristics of " A " frequency
(23 ± 5 )℃weighting network meet IEC 61672
class 2.
Under 94 dB input signal, the accuracy
are :
31.5Hz ± 3.5 dB
63 Hz ± 2.5 dB
125 Hz ± 2.0 dB
250 Hz ± 1.9 dB
500 Hz ± 1.9 dB
1 K Hz ± 1.4 dB
2 K Hz ± 2.6 dB
4 K Hz ± 3.6 dB
8 K Hz ± 5.6 dB
Remark :
The above spec. are tested under the
environment RF Field Strength less
than 3 V/M & frequency less than 30
MHz only.
2

Frequency Characteristics of A & C.
Weighting
Network A weighting :
The characteristic is simulated as "Human
Ear Listing" response. Typical, if making
the environmental sound level
measurement, always select to A
weighting.
C weighting
The characteristic is near the "FLAT"
response. Typical, it is suitable for
checking the noise of machinery (Q.C.
check) & knowing the sound pressure
level of the tested equipment.
Time Fast - t= 200 ms
weighting * "Fast" range is simulated the human ear
(Fast & Slow) response time weighting.
Slow - t = 500 ms
* "Slow" range is easy to get the average
values of vibration sound level.
Data hold To freeze the measurement value.
Peak hold To keep the peak ( max. ) measurement
value.
Range selector Auto range : 30 to 130 dB.
Manual range :
3 range, 30 to 80 dB, 50 to 100 dB,
80 to 130 dB, 50 dB on each step,
with over & under range indicating.
Frequency 31.5 to 8,000 Hz.
Microphone Electric condenser microphone.
type
Microphone Out size, 12.7 mm DIA. ( 1/2 inch).
size
3

Calibration VR Build in external calibration VR, easy to
calibrate on 94 dB level by screw driver.
* Calibrated via external SOUND
CALIBRATOR ( SC-941, optional ).
Calibrator B & K (Bruel & kjaer), MULTIFUNCTION
ACOUSTIC CALIBRATOR 4226.
Datalogger Auto 1 second to 3600 seconds
Sampling Time
@ Sampling time can set to 1 second,
Setting range but memory data may loss.
Manual Push the data logger button
once will save data one time.
@ Set the sampling time to
0 second.
@ Manual mode, can also select the
1 to 99 position ( Location ) no.
Memory Card SD memory card. 1 GB to 16 GB.
Advanced * Set clock time ( Year/Month/Date,
setting Hour/Minute/ Second )
* Decimal point of SD card setting
* Auto power OFF management
* Set beep Sound ON/OFF
* Set sampling time
* SD memory card Format
Over Indication Show " - - - - ".
Data Hold Freeze the display reading.
Memory Recall Maximum & Minimum value.
Sampling Time Approx. 1 second.
of Display
Data Output RS 232/USB PC computer interface.
* Connect the optional RS232 cable
UPCB-02 will get the RS232 plug.
* Connect the optional USB cable
USB-01 will get the USB plug.
AC output AC 0.5 Vrms corresponding to each
range step.
* Output impedance : 600 ohm.
4

Power off Auto shut off saves battery life or
manual off by push button.
Operating 0 to 50 .℃
Temperature
Operating Less than 85% R.H.
Humidity
Power Supply *
A
Alkaline or heavy duty DC 1.5 V battery
( UM3, AA ) x 6 PCs, or equivalent.
*
A
DC 9V adapter input. ( AC/DC power
adapter is optional ).
Power Current Normal operation ( w/o SD card save
data and LCD Backlight is OFF) :
Approx. DC 12 mA.
When SD card save the data but and
LCD Backlight is OFF) :
Approx. DC 51 mA.
*
A
If LCD backlight on, the power
consumption will increase approx.
30 mA.
Weight 489 g/1.08 LB.
Dimension 245 x 68 x 45 mm.
( 9.6 x 2.7x 1.9 inch ).
Accessories * Instruction manual.......................
.
1 PC
Included
Optional * Sound calibrator ( 94 dB ), SC-941.
Accessories * Sound calibrator ( 94/114 dB ), SC-942.
* Sound wind shield ball, SB-01
* SD Card ( 2 GB )
* USB cable, USB-01.
* RS232 cable, UPCB-02.
* Data Acquisition software,
SW-U801-WIN.
* AC to DC 9V adapter.
* Soft carrying case, CA-05A.
* Hard carrying case, CA-06.
5

3. FRONT PANEL DESCRIPTION
Fig. 1
3-1 Display.
3-2 Power Button ( ESC, Backlight Button )
3-3 Hold Button ( Next Button )
3-4 REC Button ( Enter Button )
3-5 Range Button ( Button, Time Check Button )▲
3-6 A/C Button ( Button, Sampling check Button )▼
3-7 Fast/Slow Button ( SET Button )
3-8 Peak Hold Button ( Logger Button )
3-9 Microphone
3-10 AC output terminal
3-11 Calibration VR
3-12 RS-232 output terminal
3-13 DC 9V adapter socket.
3-14 Tripod Fix Nut
3-15 Battery Cover Screws
3-16 Stand
3-17 Battery compartment/Cover
3-18 SD card socket 6

4. MEASURING PROCEDURE
4-1 Sound level meter
1)Power on by pressing the " Power On/Off Button " ( 3-2,
Fig. 1 ) , the meter's default function is " Auto range ",
" A frequency weighting " & " Fast time weighting ". The
LCD display will show the unit " A. Fast Auto ".
2)Select " A " or " C " frequency weighting by pressing the
" A/C Button " ( 3-6, Fig. 1 ) .
Note :
a. The characteristic table of A, C weighting, please
ref. page 22.
b. The characteristic of A weighting is simulated as
the " Human Ear Listening " response.
Typically always select the A weighting when makes
environmental sound level measurement.
c. The C weighting characteristic is near the " FLAT "
response. Typically it is suitable for checking the
noise of machinery ( Q.C. check ) & knowing the
real sound level of the tested equipment.
3)Determine proper measuring range by pressing the
" Range Button " ( 3-5, Fig. 1 ).
After power on the default range is " Auto range ".
In the same time the lower right display will show the text
of " Auto ".
Under the auto range, press the " Range Button " ( 3-5,
Fig. 1 ) once step by step will enter
to the manual range ( range 1, range 2, range 3 ) and
auto range in sequence. There are still 3 manual ranges
for your choice :
7

* Manual range 1 , 30 - 80 dB range :
Display will show the unit of " 30 - 80 ".
*
Manual range 2 , 50 - 100 dB range :
Display will show the unit of " 50 - 100 ".
*
Manual range 3 , 80 - 130 dB range :
Display will show the unit of " 80 - 130 ".
4) According to various measuring sound source, select the
Time Weighting ( Fast or Slow ) by pressing the " Time
Weighting Button " ( 3-7, Fig. 1 ).
Note :
a. If select the function of " Fast " time weighting, the
display will show the unit of " FAST".
b. If select the function of " Slow " time weighting, the
display will show the unit of " SLOW ".
4-2 Data Hold
During the measurement, press the " Hold Button " ( 3-3,
Fig. 1 ) once will hold the measured value & the LCD will
display a " HOLD " symbol.
Press the " Hold Button " once again will release the data
hold function.
4-3 Data Record ( Max., Min. reading )
1)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.
2)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, the display
will show the " REC " symbol only & execute the
memory function continuously.
8