MRC MSL-388SD User manual

OPERATION MANUAL
SD card real time data recorder
4 - 20 mA output
SOUND LEVEL DATA RECORDER
Model : MSL-388SD
Your purchase of this
SOUND LEVEL DATA RECORDER
with 4 - 20 mA output, marks a
step forward for you
into the field of
precision measurement.
Although this meter a
complex and delicate
instrument, its durable
structure will allow
many years of use if
proper operating
techniques are
developed. Please read
the following
instructions carefully
and always keep this
manual within easy
reach.
Hagavish st. Israel 58817 Tel: [phone], Fax: [phone] ,3
[email protected]
MRC. 1.23

TABLE OF CONTENTS
1. FEATURES...................................................................................................................
1
2. SPECIFICATIONS..........................................................................................................
2
3. FRONT PANEL DESCRIPTION..........................................................................
6
4. MEASURING PROCEDURE...........................................................................................
7
4-1 Sound Pressure Level
Measurements (SPL).................................
7
4-2 Sound Pressure Measurements Range select…………………..
7
4-3 Sound Frequency weighting select .............................................................
7
4-4 Sound Time Weighting select ………............................…………..
8
4-5 Data Hold..........................................................................................................
8
4-6 Data Record ( Max., Min. reading )................................................................................................................
8
4-7 LCD Backlight ON/OFF………………………………………………………
9
4-8 Time check................................................................................................................
9
4-9 4-20 mA output…………………………………………..…………………
9
5. DATALOGGER...................................................................................................................
10
5-1 Preparation before execute datalogger function...........................................................................
10
5-2 Auto Datalogger ( Set sampling time ≧
5 seconds )........................................................
10
5-3 Check time and sampling time information................................................................................................................
12
5-4 SD Card Data structure.....................................................................................................
12
6. Saving data from the SD card to the computer.....................................................
13
7. ADVANCED SETTING........................................................................................................
15
7-1 Set clock time ( Year/Month/Date, Hour/Minute/ Second ).....................................
15
7-2 Set sampling time ............................................................................................
16
7-3 Auto power OFF management ........................................................................
16
7-4 Set beeper Sound ON/OFF...........................................................................................
17
7-5 Decimal point of SD card setting........................................................
17
7-6 SD memory card format...................................................................................
18
8. POWER SUPPLY FROM
DC ADAPTER........................................................................
19
9. BATTERY REPLACEMENT...............................................................................................
19
10. RS232 PC SERIAL INTERFACE
....................................................................................................
19
11. FREQUENCY WEIGHTING CHARACTERISTICS
CALIBRATION ..............................................................................................................
21
12. FREQUENCY WEIGHTING CHARACTERISTICS
OF A & C NETWORKS..............................................................................................................
21
13. TONEBURST RESPONSE (FAST & SLOW)
CHARACTERISTICS..........................................................................................................
22
14. PATENT................................................................................................................................
22

1. FEATURES
* Frequency and Time weighting are designed to meet IEC 61672 class 2.
* A & C weighting networks comply with standards.
* LCD is dot-matrix with backlight and easy reading.
* Data-logger and Sound level meter.
* 0.5" standard microphone head.
* Time weighting (Fast & Slow) dynamic characteristic modes.
* Condenser microphone for high accuracy & long-term stability.
* Memory function to store the Max. & Min. value.
* Hold functions.
* Peak Hold functions.
* Real time Datalogger.
* Records device of an external.
memory device (SD memory card ) ,Real time Datalogger, it Built-in
Clock and Calendar, real time data recorder, sampling time set
from 5,10,30,60,120,300,600,1800,3600 seconds.
* 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.
* Can default auto power off or manual power off.
* 4-20 mA analog output.
* Microcomputer circuit, high accuracy.
* Power by UM4/AAA ( 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 : 50 mm x 30 mm.
LCD with backlight ( ON/OFF ).
Measurement
SPL
: Sound pressure level.
Type
Measurement SPL：30-80,50-100,80-130 , Auto ( 30 - 130 dB ).
Range
Resolution 0.1 dB.
Function dB ( A & C frequency weighting ),
Time weighting ( Fast, Slow ),
Data hold , Peak Hold ,
Record ( Max., Min. ).
4-20 mA output Please refer chapter 4-9 ( page 9 )
Accuracy : ± (0.5 % + 0.05 mA) ( 23 ± 5 ℃ )
loop impedance : max. 200 ohm.
Accuracy Characteristics of " A " frequency weighting
(23 ±5 ℃)network meet IEC 61672-1-2013, class 2.
Under 94 dB input signal, the accuracy
are :
31.5 Hz reading ±3.0 dB
63 Hz reading ±2.0 dB
125 Hz reading ±1.5 dB
250 Hz reading ±1.5 dB
500 Hz reading ±1.5 dB
1 K Hz reading ±1.0 dB
2 K Hz reading ±2.0 dB
4 K Hz reading ±3.0 dB
8 K Hz reading ±5.0 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 = 125 ms
weighting * "Fast" range is simulated the human ear
(Fast & Slow) response time weighting.
Slow - t = 1 s
* "Slow" range is easy to get the average
values of vibration sound level.
Peak hold To keep the Peak(max.) measurement value.
Function selector range：
SPL 30-80dB, 50-100dB, 80-130dB
Auto range：30～130dB.
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 Build in external calibration(key), easy to
calibrate on 94 dB level by Key Adjustment.
*
Calibrated via external SOUND
CALIBRATOR ( SC-942, optional ).
Calibrator B & K (Bruel & kjaer), MULTIFUNCTION
ACOUSTIC CALIBRATOR Type 4226.
Datalogger Auto 5,10,30,60,120,300,600,1800,
Sampling Time 3600 seconds.
Setting range
Memory device external memory device :
SD memory card. 1 GB to 16 GB.
Data error no. ≦0.1% no. of total saved data typically.
Advanced * Set clock time ( Year/Month/Date,Hour/Minute/ Second ).
setting * Set sampling time .
* Auto power OFF management.
* Set beep Sound ON/OFF.
* Decimal point of SD card setting.
* 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.
4

Power off Auto shut off within 10 minutes or manual off by
push button.
( If use DC 9V adapter input, Auto power off
function will disable).
Operating 0 to 50 ℃.
Temperature
Operating Humidity Less than 85% R.H.
Power Supply
* AC/DC power adapter is optional.
Alkaline or heavy duty DC 1.5 V battery
( UM4, AAA ) x 6 PCs, or equivalent.
* AC/DC power adapter is optional.
DC 9V adapter input. ( AC/DC power
adapter ).
Power Current Normal operation ( w/o SD card save
data and LCD Backlight is OFF) :
Approx. DC 8.1 mA.
When SD card save the data but and
LCD Backlight is off) : consumption will increase
Approx. DC 22 ~ 34 mA.
* AC/DC power adapter is optional.
If LCD backlight on, the power
consumption will increase approx.
DC 2.4 mA.
Weight 230 g/ 0.51 LB. (without battery)
Dimension 132 x 80 x 32 mm.
( 5.2 x 3.1 x 1.3 inch ).
Accessories
*
Instruction manual.........................................
1 PC
Included
*
SKT-AS385……………………………………....
1 PC
*
Hanging unit (with sticker)…………………………………………………………
1 PC
*
Microphone with clip…………………………....
1 PC
*
AC to DC 9V adapter.…………………………....
1 PC
Optional
*
Sound calibrator ( 94 dB ), SC-941.
Accessories
*
Sound calibrator ( 94/114 dB ), SC-942.
*
Sound wind shield ball, SB-01.
*
SD Card .
*
USB cable, USB-01.
*
RS232 cable, UPCB-02.
*
Data Acquisition software, SW-U801-WIN.
*
Excel data Acquisition software,SW-E802.
5

3. FRONT PANEL DESCRIPTION
Fig. 1
3-1 Display 3-11 Stand
3-2 Power Button( Backlight Button ) 3-12 Battery cover/ Battery compartment
3-3 ▲ Button ( Range )3-13 Screw of the battery cover
3-4 REC Button ( HOLD ) 3-14 Hanging unit (with sticker)
3-5 TIME Button (Set) 3-15 Reset Switch
3-6 ▼ Button ( A/C ,Fast ,Slow, Peak ) 3-16 RS232 Output
3-7 ENTER Button (Log) 3-17 SD card socket
3-8 Microphone input jack 3-18 4-20 mA Output Terminal
3-9 DC 9V adapter socket 3-19 Microphone plug
3-10 Hanging holes 3-20 Microphone
6

4. MEASURING PROCEDURE
4-1 Sound Pressure Measurements (SPL)
In SPL mode the display shows readings of
the sound pressure level.
1) Power ON the meter by pressing and holding the " Power
Button " ( 3-2, Fig. 1 )for at least 1.5 seconds,
the meter's default function is " A"( frequency weighting) ,
" Fast"( time weighting) " Auto range ". The
LCD display will show the Symbol " A, FAST , xx.x dB ".
4-2 Sound Pressure Measurements Range select
Use the " ▲ Button " ( 3-3, Fig. 1 ) to select
the Sound Measurement Range shown (AUTO , 30 - 80 , 50 - 100 ,
80 - 130 ,AUTO) reading in the center of the range. If dashes
appear on the display select a new range , After power on the
default range is " Auto range " In the same time the LCD display
b. The characteristic of A weighting is simulated as
will show the text of " AUTO " Under the auto range.
4-3 Sound Frequency weighting select
How to select the frequency weighting ( A or C),
by pressing and holding the " ▼ Button " ( 3-6, Fig. 1 ) for at
least 2 seconds to select A or C Frequency weighting .
Note :
a. The characteristic of A weighting is simulated as the
b. The characteristic of A weighting is simulated as
" Human Ear Listening " response.
the " Human Ear Listening " response.
Typically always select the A weighting when makes
Typically always select the A weighting module when
environmental sound level measurement.
makes environmental sound level measurement.
b. The C weighting characteristic is near the " FLAT "
c. The C weighting characteristic is near the " FLAT "
response. Typically it is suitable for checking the
response. Typically it is suitable for checking the
noise of machinery ( Q.C. check ) & knowing the
noise of machinery ( Q.C. check ) & knowing the
real sound level of the tested equipment.
7

4-4 Sound Time Weighting select
According to various measuring sound source, by pressing the
"▼ ( Time Weighting) Button " ( 3-6, Fig. 1 ) once to select the
Time Weighting ( Fast or Slow or PEAK Fast ) .
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 ".
c. If select the function of " PEAK " time weighting, the
display will show the unit of " PEAK and FAST " text.
4-5 Data Hold
During the SPL measurement, pressing and holding the
" HOLD Button " ( 3-4, Fig. 1 ) for at least 2 seconds will hold
the measured value & the LCD will display a " HOLD " symbol.
pressing and holding the " Hold Button " for at least 2 seconds
again will leave the data hold function.
4-6 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 display
is shown the" REC " symbol .
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. Press the " REC Button"
again the " REC MIN " symbol along with the minimum
value will appear on the display. Press the " REC Button"
again will show the " REC " symbol only & execute the
memory function continuously.
8

b) To exit the memory record function, just press the
" REC " button > 2 seconds at least. The display will
revert to the current reading.
4-7 LCD Backlight ON/OFF
After power ON, the " LCD Backlight " will light
automatically. During the measurement, press the
" POWER Button " ( 3-2, Fig. 1 ) once will turn off the
" LCD Backlight ".
Press the " POWER Button " once again will turn ON the
" LCD Backlight " again.
4-8 Time check
During the measurement, press the
" Time Button " ( 3-5, Fig. 1 ) once display will show
Year/Month/Date, Hour/Minute/Second and sampling time
information.
4-9 4-20 mA output
Connect another mA meter into the SOUND LEVER DATA
RECORDER ( 3-18 Fig1 4-20 mA Output Terminal) socket ,the
recorder will be output 4-20 mA analog signal .
Note : Accuracy : ± (0.5 % + 0.05mA)( 23 ± 5 ℃ )
at 30 - 80 dB range (≦ 30 dB = 4.00 mA out , ≧ 80 dB = 20.00 mA out )
at 50 - 100 dB range (≦ 50 dB = 4.00 mA out , ≧ 100 dB = 20.00 mA out )
at 80 - 130 dB range (≦ 80 dB = 4.00 mA out , ≧ 130 dB = 20.00 mA out )
at Auto range (≦ 30 dB = 4.00 mA out , ≧ 130 dB = 20.00 mA out )
Remark:
*When power use AC to DC adapter, the 4-20 mA will output.
9

5. DATALOGGER
5-1 Preparation before execute datalogger function
a. Insert the SD card
Prepare a " SD memory card " ( 1 GB to 16 GB, optional ),
insert the SD card into the " SD card socket " ( 3-17, Fig. 1).
The front panel of the SD card should face against the
left side plastic case.
b. SD card Format (Suggest using AC to DC Adapter)
If SD card just the first time use into the meter, it
recommend to make the " SD card Format " at first. ,
please refer chapter 7-6 ( page 18 ).
c. Time setting
If the meter is used at first time, it should to adjust the
clock time exactly, please refer chapter 7-1 ( page 15 ).
d. Decimal format setting
The numerical data structure of SD card is
default used the " . " as the decimal, for
example "20.6" "1000.53" . But in certain
countries ( Europe ...) is used the " , " as the
decimal point, for example " 20, 6 "
"1000,53". Under such situation, it should
change the Decimal character at first, details
of setting the Decimal point, refer to Chapter
7-5, page 17.
5-2 Auto Datalogger ( Set sampling time ≧ 5 seconds )
a. Start the datalogger
Pressing and holding the " ENTER Button ( 3-7, Fig. 1 ) > 2 seconds
, display is shown " LOGGER " , the " LOGGER " will flashing
10

at the same time the measuring data along with the time
information will be saved into the memory circuit.
Remark :
How to set the sampling time, refer to Chapter 7-2, page 16.
b. Pause the datalogger
During execute the Datalogger function , if press the
" ENTER Button " ( 3-7, Fig. 1 ) once will pause the
Datalogger function ( stop to save the measuring data
into the memory circuit temporality ). In the same time
the text of " LOGGER " will stop flashing.
Remark :
If press the " ENTER Button " ( 3-7, Fig. 1 ) once again
will execute the Datalogger again, the text of " LOGGER " will
flashing .
c. Finish the Datalogger
Press the " ENTER Button "( 3-7, Fig. 1) continuously at
least two seconds, the " LOGGER " indicator will be
disappeared and finish the Datalogger.
Remark :
When the battery is under the low battery condition
( show the low battery indicator ), the Datalogger
function is maybe disable.
11

5-3 Check time and sampling time information
During the measurement if press " TIME Button "
( 3-5, Fig. 1 ) once, the LCD display will
present the time and sampling time information of Year/Month/
Date , Hour/ Minute/Second, and sampling time information
in second unit.
5-4 SD Card Data structure
1)
When the first time, the SD card is used into the meter,
the SD card will generate a folder :
SLD01
2)
If the first time to execute the Datalogger,
under the route SLD01\, will generate a new
file name SLD01001.XLS.
After exist the Datalogger, then execute again,
the data will save to the SLD01001.XLS until
Data column reach to 30,000 columns, then
will generate a new file, for example SLD01002.XLS
3)
Under the folder SLD01\, if the total files more
than 99 files, will generate anew route, such as
SLD02\ ........
4)
The file's route structure :
SLD01\
SLD01001.XLS
SLD01002.XLS
.....................
SLD01099.XLS
SLD02\
SLD02001.XLS
SLD02002.XLS
.....................
SLD02099.XLS
SLDXX\
.....................
.....................
Remark : XX : Max. value is 10.
12

6. Saving data from the SD card
to the computer ( EXCEL software )
1) After execute the Data Logger function, take away the
SD card out from the " SD card socket " ( 3-17, Fig. 1 ).
2) Plug in the SD card into the Computer's SD card slot
( if your computer build in this installation ) or
insert the SD card into the " SD card adapter ". then
connect the " SD card adapter " into the computer.
3) Power ON the computer and run the " EXCEL software ".
Down load the saving data file ( for example the file
name : SLD01001.XLS, SLD01002.XLS ) from the SD
card to the computer. The saving data will present into
the EXCEL software screen ( for example as following
EXCEL data screens ) , then user can use those EXCEL
data to make the further Data or Graphic analysis
usefully.
EXCEL data screen ( for example )
13

EXCEL graphic screen ( for example )
14

7. ADVANCED SETTING
Under do not execute the Datalogger function,
press the " TIME Button " ( 3-5, Fig. 1 ) continuously at
least 1.5 seconds will enter the " Advanced Setting " mode.
then press the "TIME Button " (3-5, Fig. 1 ) once a while
in sequence to select the six main function, the lower
display will show :
DATE…… Set clock time ( Year/Month/Date, Hour/Minute/
Second )
SP-T......... Set sampling time ( 5-3600 Seconds )
POFF....... Auto power OFF management
BEEP....... Set beeper sound ON/OFF
DEC......... Set SD card Decimal character
SD- F....... SD memory card Format ( DC 9V Adapter only )
During execute the " Advanced Setting " function,
if press " Enter Button " ( 3-7, Fig. 1 ) will into main function.
if press " POWER Button " ( 3-2, Fig. 1 ) once will exit
the " Advanced Setting " function, the LCD will
return to normal screen.
7-1 Set clock time ( Year/Month/Date,
Hour/Minute/ Second )
When the lower display show " DATE "
1) Use the " ▲ Button " ( 3-3, Fig. 1 ) or " ▼ Button "
( 3-6, Fig. 1 ) to adjust the value ( Setting start from
Year value ). After the desired value is set, press the
" Enter Button " ( 3-7, Fig. 1 ) once will going to
next value adjustment ( for example, first setting
value is Year then next to adjust Month, Date, Hour,
Minute, Second value ).
15

2) After set all the time value ( Year, Month, Date, Hour,
Minute, Second ),
the screen will jump to " Set sampling time character "
setting screen ( Chapter 7-2 ).
Remark :
After the time value is setting, the internal clock will
run precisely even Power is off ( The battery is under
normal condition, no low battery condition ).
7-2 Set sampling time ( seconds )
When the lower display show " SP-T "
1) Use the " ▲ Button " ( 3-3, Fig. 1 ) or " ▼ Button " (
3-6, Fig. 1 ) to adjust the value ( 5 ~ 3600 sec.)
2) After the Sampling value is selected, press the
" ENTER Button " ( 3-7, Fig. 1 ) will save the setting
function with default.
7-3 Auto power OFF management
When the lower display show " POFF "
1) Use the " ▲ Button " ( 3-3, Fig. 1 ) or " ▼ Button "
( 3-6, Fig. 1 ) to select the upper text to " YES " or
" NO ".
YES - Auto Power Off management will enable.
NO - Auto Power Off management will disable.
2) After select the upper text to " YES " or " NO ", press the
" ENTER Button " ( 3-7, Fig. 1 ) will save the setting
function with default.
16

7-4 Set beeper sound ON/OFF
When the lower display show " BEEP "
1) Use the " ▲ Button " ( 3-3, Fig. 1 ) or " ▼ Button "
( 3-6, Fig. 1 ) to select the upper text to " YES " or
" NO ".
YES - Meter's beep sound will be ON with default.
NO - Meter's beep sound will be OFF with default.
2) After select the upper text to " YES " or " NO ", press the
" ENTER Button " ( 3-7, Fig. 1 ) will save the setting
function with default.
Remark :
After execute the datalogger function, the buzzer sound
will off automatically to prevent any interference of
the measurement.
7-5 Decimal point of SD card setting
The numerical data structure of SD card is default used
the " . " as the decimal, for example "20.6" "1000.53" .
But in certain countries ( Europe ...) is used the " , " as
the decimal point, for example " 20,6 " "1000,53".
Under such situation, it should change the Decimal
character at first.
When the lower display show " DEC "
1) Use the " ▲ Button " ( 3-3, Fig. 1 ) or " ▼ Button "
( 3-6, Fig. 1 ) to select the upper text to " USA " or
" EURO ".
USA - Use " . " as the Decimal point with default.
EURO - Use " , " as the Decimal point with default.
17

2) After select the upper text to " USA " or " EURO ",
press the " ENTER Button " ( 3-7, Fig. 1 ) will save the
setting function with default.
7-6 SD memory card Format (Suggest using AC to DC Adapter)
When the lower display show " SD-F "
1) Use the " ▲ Button " ( 3-3, Fig. 1 ) or " ▼ Button " (
3-6, Fig. 1 ) to select the upper text to "YES " or
" NO ".
YES - Intend to format the SD memory card
NO - Not execute the SD memory card format
2) If select the upper to " YES ", press the " ENTER Button
" ( 3-7, Fig. 1 ) once again, the Display will show text
" YES ENTER " to confirm again, if make sure to do the
SD memory card format, then press " Enter Button "
once will format the SD memory clear all the existing
data that already saving into the SD card.
REMARK:
* It recommend strongly,do not use memory cards that have
been formatted by other meter or by other installation (such
as camera…) Reformat the memory cards with your meter.
*If the SD memory card exist the trouble during format by the
meter ,use the computer to reformat again can fix the problem.
18