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SD card real time data recorder
4 - 20 mA output
SOUND LEVEL DATA RECORDER
Model : MSL-388SD
OPERATION MANUAL
Hagavish st. Israel 58817 Tel: 972 3 5595252, Fax: 972 3 5594529 ,3
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.
mrc@mrclab.com
MRC. 1.23
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Summary of Contents for MRC MSL-388SD
- Page 1 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.
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Page 2: Table Of Contents
TABLE OF CONTENTS 1. FEATURES....................2. SPECIFICATIONS..................3. FRONT PANEL DESCRIPTION..............4. MEASURING PROCEDURE................ 4-1 Sound Pressure Level Measurements (SPL)......... 4-2 Sound Pressure Measurements Range select………………….. 7 4-3 Sound Frequency weighting select ............. 4-4 Sound Time Weighting select ………......………….. 4-5 Data Hold......................4-6 Data Record ( Max., Min. -
Page 3: Features
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 &... -
Page 4: Specifications
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. - Page 5 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.
- Page 6 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.
- Page 7 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.
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Page 8: Front Panel Description
3. FRONT PANEL DESCRIPTION Fig. 1 3-1 Display 3-11 Stand 3-2 Power Button( Backlight Button ) 3-12 Battery cover/ Battery compartment 3-13 Screw of the battery cover 3-3 ▲ Button ( Range ) 3-4 REC Button ( HOLD ) 3-14 Hanging unit (with sticker) 3-5 TIME Button (Set) 3-15 Reset Switch 3-6 ▼... -
Page 9: Measuring Procedure
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 "... -
Page 10: Sound Time Weighting Select
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. -
Page 11: Lcd Backlight On/Off
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. -
Page 12: Datalogger
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. - Page 13 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 "...
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Page 14: Check Time And Sampling Time Information
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. -
Page 15: Saving Data From The Sd Card To The Computer
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 "... - Page 16 EXCEL graphic screen ( for example )
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Page 17: Advanced Setting
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……... -
Page 18: Set Sampling Time
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 ). -
Page 19: Set Beeper Sound On/Off
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 "... -
Page 20: Sd Memory Card Format
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 "... -
Page 21: Power Supply From Dc Adapter
8. POWER SUPPLY from DC ADAPTER The meter also can supply the power supply from the DC 9V Power Adapter, Insert the plug of Power Adapter into " DC 9V Power Adapter Input Socket " ( 3-9, Fig. 1 ). 9. - Page 22 Meter (9W 'D" Connector) Center Pin..........Pin 4 (3.5 mm jack plug) Ground/shield........... Pin 2 2.2 K resistor Pin 5 The 16 digits data stream will be displayed in the following format : D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Each digit indicates the following status : Start Word When send the SPL display data = 1...
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Page 23: Frequency Weighting Characteristics Calibration
11. CALIBRATION 1) Prepare the optional " SOUND CALIBRATOR ", such as " SC-941 " or " SC-942 " ( set range to 94.0 dB ). Power on the Sound Calibrator & plug calibrator output socket into the " Microphone " head ( 3-20, Fig. 1 ) of the Sound Level meter. -
Page 24: Toneburst Response (Fast & Slow)
The meter ( SD card structure ) already get patent or patent pending in following countries : Germany Nr. 20 2008 016 337.4 JAPAN 3151214 TAIWAN M 358970 M 359043 CHINA ZL 2008 2 0189918.5 ZL 2008 2 0189917.0 Patent pending MRC.1.23...
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