BSWA 309 User Manual
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BSWA 309 User Manual

Sound level meter
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BSWA 308/309
Sound Level Meter
User Manual
BSWA TECH
GB/T 3785.1
GB/T 3785.2
JJG 188-2002
IEC 60651
IEC 60804
IEC 61672-1

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  • Page 1 BSWA TECH BSWA 308/309 Sound Level Meter User Manual GB/T 3785.1 GB/T 3785.2 JJG 188-2002 IEC 60651 IEC 60804 IEC 61672-1...
  • Page 2 BSWA 308/309 Sound Level Meter User Manual BSWA-III-C021-04-P0274 v3.16 Copyright © 2020 BSWA Technology Co., Ltd The specification of product is subject to changes without notice www.bswa-tech.com Dec. 2020...

  • Page 3: Change History

    There is no warranty, position or other implication of any kinds in this manual. BSWA and its employees are not liable for any direct or indirect loss of data, benefits, etc. due to any information contained or mentioned in this manual.

  • Page 4: Table Of Contents

    BSWA 308/309 BSWA Technology Co., Ltd Contents Change History ....................... 1 Contents ......................... 2 Appearance ........................6 Buttons of Operation ....................... 7 1. Introduction ......................... 8 1.1 General Description ....................8 1.2 Applications ......................8 1.3 Features ........................8 1.4 Function Upgrades ....................9 1.5 Spectification ......................
  • Page 5 BSWA 308/309 BSWA Technology Co., Ltd 3.4 Screen of 1/3 Octave Mode ................... 30 4. Operation and Setting of the Menu ................32 4.1 Function ........................ 32 4.2 Calibration ......................33 4.2.1 Calibration by Measurement ................33 4.2.2 Calibration by Cal.Factor .................. 33 4.2.3 Conversion of Cal.Factor and Sensitivity ............
  • Page 6 BSWA 308/309 BSWA Technology Co., Ltd 4.4.7 Auto PWR Off ....................50 4.4.8 RS-232 ......................50 4.4.9 File Manager ....................51 4.4.10 Boot Mode ...................... 52 4.4.11 USB Mode ...................... 53 4.4.12 GPS ....................... 54 4.4.13 Setup Template ....................54 4.4.14 About ......................
  • Page 7 BSWA 308/309 BSWA Technology Co., Ltd 6. Operation Notes ...................... 107 6.1 Operation ......................107 6.2 Common Issue and Solutions ................107 6.3 Calibration ......................108 6.4 Firmware Update ....................108 6.4.1 Install USB Driver ................... 108 6.4.2 Firmware Update Procedure ................109 6.5 Warranty ......................

  • Page 8: Appearance

    BSWA 308/309 BSWA Technology Co., Ltd Appearance Microphone and preamplifier LED indicator 1/4” thread LCD with backlight Battery LR6/AA/AM3 Non-slip surface Cover lock: Left◄: unlock Right►: locked Power Jack (7V~14V) Trigger DC Output AC Output...

  • Page 9: Buttons Of Operation

    BSWA 308/309 BSWA Technology Co., Ltd Buttons of Operation LED indicator <Power> LCD Screen <ESC/Back Erase> <Enter> Arrow keys <▲><▼> <◄><►> <Backlight> <Start/Stop> <Menu/Pause>...

  • Page 10: Introduction

    The new BSWA 308/309 are new generation octave sound level meter upgrade from base BSWA 308/309 to meet the market demand. It fulfill the 1/1 octave and 1/3 octave requirement of IEC standard and China GB/T standard. BSWA 308/309 is a digital sound level meter which design and manufacture by BSWA.

  • Page 11: Function Upgrades

    BSWA 308/309 BSWA Technology Co., Ltd  Frequency weighting: A/B/C/Z. Time weighting: Fast/Slow/Impulse  3-Profile and 14 custom define measurement are calculate in parallel with different frequency/time weighting  Calculate SPL, LEQ, Max, Min, Peak, SD, SEL, E, Lday, Levening, Lnight, Ldn, Lden ...
  • Page 12 BSWA 308/309 BSWA Technology Co., Ltd GB/T 3241-2010, IEC 61260-1:2014 GB/T 3241-2010, IEC 61260-1:2014 ANSI S1.11-2004. Base 10 system. ANSI S1.11-2004. Base 10 system. MPA231T: 1/2” prepolarized MPA309T: 1/2” prepolarized Supplied measurement microphone, Class measurement microphone, Class Microphone 1. Sensitivity: 40mV/Pa. Frequency 2.
  • Page 13 BSWA 308/309 BSWA Technology Co., Ltd Level Linearity 22dB(A)~136dB 25dB(A)~136dB 2, 3, 4 Range Octave: 30dB~136dB Octave: 33dB~136dB Dynamic Range 123dB (13dB(A)~136dB) 122dB (14dB(A)~136dB) 2, 3 Peak C Range 47dB~139dB 50dB~139dB Maximum input voltage: 5Vrms (7.07Vpeak). Input impedance of Electrical Input preamplifier: >6GΩ...

  • Page 14: Information For Periodic Tests

    Note 1: Ignore the result outside 20Hz~12.5kHz for type BSWA 309 alone due to microphone frequency response of Class 2. Note 2: The data was measured with 40mV/Pa microphone for BSWA 308 and BSWA 309. Note 3: Measurement according to GB/T 3785 and IEC 61672.

  • Page 15: Key Component

    Sound level meter without microphone CC308 Case Carrying case MA231T ICCP preamplifier with TNC connector MP231/MP309 Class 1 (308) or class 2 (309) microphone WS002-9 Windscreen 90mm diameter windscreen for 1/2” microphone MicroSD Card 4G memory card to store data Battery...

  • Page 16: Packing Drawing

    BSWA 308/309 BSWA Technology Co., Ltd 1.9 Packing Drawing ★Note: The detail of packing items may vary to follow orders.

  • Page 17: China Certification Of Pattern Approval (Cpa)

    BSWA 308/309 BSWA Technology Co., Ltd 1.10 China Certification of Pattern Approval (CPA) CPA of BSWA 308 2014S226-11 CPA of BSWA 309 2012S233-11...

  • Page 18: China Metrology Certification (Cmc)

    BSWA 308/309 BSWA Technology Co., Ltd 1.11 China Metrology Certification (CMC) CMC of BSWA 308 京制 01020122 号 CMC of BSWA 309 京制 01020122 号...

  • Page 19: Ce Certification

    BSWA 308/309 BSWA Technology Co., Ltd 1.12 CE Certification...

  • Page 20: Rohs Verification Report

    BSWA 308/309 BSWA Technology Co., Ltd 1.13 RoHS Verification Report...

  • Page 21: The Appearance And Operation

    BSWA 308/309 BSWA Technology Co., Ltd 2. The Appearance and Operation BSWA 308/309 uses the same body and the keypad layout. LCD screen, keypad and LED indicators lay on the front of instrument. 2.1 Keypad Sound level meter has 10 keys, namely: <Power>...

  • Page 22: Microphone Connector

    BSWA 308/309 BSWA Technology Co., Ltd <Start/Stop>: Start or stop the measurement. <▲>: Up arrow used to select the menu item or adjust the parameters. <▼>: Down arrow used to select the menu item or adjust the parameters. <◄>: Left arrow used to select the menu item, or adjust the parameters, or switch measure screens.

  • Page 23: Windscreen

    BSWA 308/309 BSWA Technology Co., Ltd Microphone and preamplifier are mounted together by thread. Unless special situation, please do not separate each other. The microphone is a precision measurement sensor, long-term exposure to high humidity or dust environment would impact microphone.

  • Page 24: Data And Power Supply Connector

    BSWA 308/309 BSWA Technology Co., Ltd 2.4 Data and Power Supply Connector There are 7 interfaces at the bottom of the sound level meter. Open the rubber cover to see these interfaces. PWR: Power connector, using the standard DC socket (2.1mm core diameter), can connect to the 7~14V 500mA external power supply.

  • Page 25: Battery

    BSWA 308/309 BSWA Technology Co., Ltd Disk Mode. Note that the MicroSD card provides with the sound level meter has already formatted before sale. ★Note: Keep front side (with silk screen) of MicroSD card down to insert without hot-plug. RS-232: It can be use as standard RS-232 port at Remote mode, and also can be used to connect thermal printer as Printer mode.

  • Page 26: Gps

    BSWA 308/309 BSWA Technology Co., Ltd Turn the button to the left side to unlock the battery compartment cover. Then lift the cover to open it. Close and lock the battery compartment after change the battery. 2.6 GPS GPS antenna cover located on the top surface of sound level meter which select GPS function as option module.
  • Page 27 BSWA 308/309 BSWA Technology Co., Ltd  Satellite Ephemeris: GPS satellites orbit information. According to ephemeris, satellite positioning signal and time, the current location can be determined. Ephemeris need to download from the GPS satellites, but the download speed is very low (approx. 50bps), and vulnerable to the impact of satellite signal strength.

  • Page 28: Measurement Screen

    BSWA 308/309 BSWA Technology Co., Ltd 3. Measurement Screen Sound level meter has three measurement modes: Level Meter, 1/1 Octave, 1/3 Octave. User can select it in the menu of Function. Level Meter has 8 screens which can be switch through <◄>, <►>. The 8 screens are: Main, 3-Profiles, LN Statistical, Time History, Custom Measurement Page 1, Custom Measurement Page 2, GPS Page 1 and GPS Page 2.
  • Page 29 BSWA 308/309 BSWA Technology Co., Ltd Trigger state. Displayed when trigger is enable. RS-232 state. Icon will be displayed at the Remote mode, and icon will be displayed at Printer mode. Timer state. Icon means the timer is enabled and only run once.

  • Page 30: Screen Of Level Meter Mode

    BSWA 308/309 BSWA Technology Co., Ltd 3.2 Screen of Level Meter Mode Main screen. Display the measurement data, filter, detector, mode and Profile number. Main screen only display one group data of 3-Profile. Press <▲>, <▼> to switch within 3-Profile.
  • Page 31 BSWA 308/309 BSWA Technology Co., Ltd Custom Measurement Page 1. User can set the parameters of the 14 sets of measurement. This screen can display the first 7 sets. Custom Measurement Page 2. User can set the parameters of the 14 sets of measurement.

  • Page 32: Screen Of 1/1 Octave Mode

    BSWA 308/309 BSWA Technology Co., Ltd 3.3 Screen of 1/1 Octave Mode 1/1 Octave Spectra. Display 12 bands of 8Hz~16kHz and L as bar graph. Press <▲>, <▼> to display the detail value of each band. A threshold can be set for each band. The LED indicator will turn red when the data exceed the threshold.
  • Page 33 BSWA 308/309 BSWA Technology Co., Ltd Octave Table Page 1. Display the measurement data of 6.3Hz~80Hz. The LED indicator will turn red and dB value will display as invert color when the data exceed the threshold. Octave Table Page 2. Display the measurement data of 100Hz~1.25kHz.

  • Page 34: Operation And Setting Of The Menu

    BSWA 308/309 BSWA Technology Co., Ltd 4. Operation and Setting of the Menu Press <Menu> to access the next level menu. All parameters related to measurement can be set in the menu. Menu Tree 4.1 Function Select Function and press <Enter> to enter this menu.

  • Page 35: Calibration

    BSWA 308/309 BSWA Technology Co., Ltd 4.2 Calibration Select Calibration and press <Enter> to enter this menu. Many factors include temperature, humidity and air pressure will impact the microphone's sensitivity. Therefore, user must run calibration at least once before measurement.

  • Page 36: Process Of Calibration By Measurement

    4.2.4 Process of Calibration by Measurement Calibration by measurement is the recommend method of calibration with sound calibrator. BSWA can provide class 1 and class 2 sound calibrator comply with the GB/T 15173-2010, IEC60942: 2003 standard. The process of calibration by measurement is shown as following: Insert the microphone into the cavity of the calibrator until stop without loosening.
  • Page 37 BSWA 308/309 BSWA Technology Co., Ltd Select Calibration in the menu and then press <Enter> to enter By Measurement. Adjust Cal.Level in the menu, for example adjust to 93.8dB. There is 5s delay after press <Start> to run calibration. After the end of calibration, sound level meter will update the calibration factor. Press <Enter>...

  • Page 38: Measurement

    BSWA 308/309 BSWA Technology Co., Ltd 4.3 Measurement There are 13 items in the menu of Measurement. Press <▲>, <▼> can choose and select, press <Enter> to access next level of menu. 4.3.1 MEAS.Setup Menu of MEAS.Setup is the most important menu related to measurement.
  • Page 39 BSWA 308/309 BSWA Technology Co., Ltd SWN/OCT saves the time history data into file. The data source in Level Meter mode is Profile 1~3 (select in SWN Save of Profile 1~3 menu) and store as SWN file; in 1/1 Octave mode save all bands of octave and LAeq, LBeq, LCeq, LZeq, store as OCT file.

  • Page 40: Pause Measurement And Back Erase

    BSWA 308/309 BSWA Technology Co., Ltd 4.3.2 Pause Measurement and Back Erase The running measurement can be temporarily paused by pressing the <Menu/Pause> key. When the measurement is paused, the sound level meter will stop integrating the integral data, but the instantaneous data such as SPL will continue to update and display. Pressing <Menu/Pause>...

  • Page 41: Meas.range

    BSWA 308/309 BSWA Technology Co., Ltd When the measurement is paused, the measurement state icon will show whether the back erase is available or not: : Back erase is invalid. : Back erase is valid, then press <ESC/Back Erase> key and all integral data will be restored to the state before 5 seconds.

  • Page 42: Profile 1~3

    BSWA 308/309 BSWA Technology Co., Ltd 4.3.4 Profile 1~3 Menu of Profile 1~3 can set the Filter, Detector, Mode and SWN Save. Press <▲>, <▼> can choose and select. Filter: Set the filter of Profile 1~3. Press <◄>, <►> can select the option: A, B, C and Z (Z-weighting means no weighting and sometimes it is called Flat or Linear).

  • Page 43: Extended Function

    BSWA 308/309 BSWA Technology Co., Ltd 4.3.6 Extended Function Extended Function can set which screen can be display. If the screen is not selected, it will not be display. Note that Main screen is designed to be displayed all the time.

  • Page 44: Time History

    BSWA 308/309 BSWA Technology Co., Ltd 4.3.8 Time History Press <▲>, <▼> can set the data source and duration time of Time History. Profile: Press <◄>, <►> can set the data source of time history: Profile1, Profile 2, Profile 3.

  • Page 45: Timer

    BSWA 308/309 BSWA Technology Co., Ltd Press <▲>, <▼> can set the option of each group of custom measurement: Filter, Detector and Mode. Filter: Press <◄>, <►> can set the filter of custom measurement: A, B, C and Z (Flat).

  • Page 46: Measurement By Timer

    BSWA 308/309 BSWA Technology Co., Ltd ★Note: Repeat Period must greater than total integral time (Itg.Period x Repeat) +5s, since there is fixed 3s delay for Timer triggered measurement and another 2s is needed before the delay. It is forbidden to change the settings when the Timer is working. Otherwise, there will be something wrong with the Timer.

  • Page 47: Lden Period

    BSWA 308/309 BSWA Technology Co., Ltd 4.3.13 Lden Period Menu of Lden Period can set the start time of day, evening, night and the penalty value of evening and night. Press <▲>, <▼> can choose and select. The time of day, evening, night and penalty value need to be determined according to local regulations.

  • Page 48: Backlight

    BSWA 308/309 BSWA Technology Co., Ltd 4.4.2 Backlight Sound level meter provide the auto turn off function of backlight to reduce the power consume and extend battery life. Menu of Backlight can set the backlight timeout on-off and delay time. Press <▲>, <▼> can choose and select.

  • Page 49: Date & Time

    BSWA 308/309 BSWA Technology Co., Ltd measurement. Notice that when enable the Trigger function, the <Start/Stop> button is unavailable. 4.4.5 Date & Time Menu of Date & Time can set the RTC time of sound level meter. Press <▲>, <▼> can choose and select.
  • Page 50 BSWA 308/309 BSWA Technology Co., Ltd ★Note: The RTC of sound level meter has calibrated to a reference clock with average error 2ppm (maximum error 3ppm). The time accuracy keep <10ppm (<26s within 30 days) at room temperature. The maximum time error is approx. 5s~8s at 25℃ in internal test.

  • Page 51: Rtc Calibration

    BSWA 308/309 BSWA Technology Co., Ltd 4.4.6 RTC Calibration In the menu of Data & Time, Press <◄>、<►>、<◄>、<►>、 <Menu/Pause>、 <◄>、 <◄>、 <►>、 <►>、< Menu/Pause > can enter the RTC Calibration screen. RTC and MCK are the clocks used for timing when the sound level meter is turned off and on, respectively. When the sound level meter is turned on, it will read the date and time in RTC once, and then convert to MCK timing.

  • Page 52: Auto Pwr Off

    BSWA 308/309 BSWA Technology Co., Ltd 4.4.7 Auto PWR Off Sound level meter provide the auto power off function to reduce the power consume. When sound level meter keep stop state and no key press for a while, it will power off base on the setting.

  • Page 53: File Manager

    BSWA 308/309 BSWA Technology Co., Ltd Response: Response (refer to 5.3 Instruction to earn more detail) can enable or disable the response signal (ACK/NAK), the option is: ON, OFF. Press <◄>, <►> can choose and select. 4.4.9 File Manager File Manager can manage the stored SWN, OCT and CSD file.

  • Page 54: Boot Mode

    BSWA 308/309 BSWA Technology Co., Ltd Select Option in menu of CSD File, and then press <◄>、<►> can View or Print the CSD file. After select file number and action, press <Enter> to view or print the content of file.

  • Page 55: Usb Mode

    BSWA 308/309 BSWA Technology Co., Ltd measurement. When sound level meter was integrated into other system, it will power on and start measurement automatically from power shutdown. Hardware Mode Switch: The hardware mode switch located in the battery compartment. It’s easily to be found after remove the batteries.

  • Page 56: Gps

    BSWA 308/309 BSWA Technology Co., Ltd It always working at Modem Mode without ask when connect to computer by USB. Sound level meter can be recognized as serial port (virtual serial port) by computer and follow the same protocol as RS-232 (refer to 5.

  • Page 57: About

    BSWA 308/309 BSWA Technology Co., Ltd 4.4.14 About About menu shows the Type, Class, S/N (serial number), Ver., and HWID (hardware ID) of sound level meter. 4.5 Language Sound level meter support 6 language: English, Chinese, Portuguese, Spanish, German and French. Press <▲>, <▼>...

  • Page 58: Dc Out

    BSWA 308/309 BSWA Technology Co., Ltd monitor due to noise floor is higher than the lower limit of linear range of sound level meter. 4.6.2 DC OUT DC OUT is used to output the analog DC signal which is proportional to measurement result with 10mV/dB ratio.

  • Page 59: Factory Settings

    BSWA 308/309 BSWA Technology Co., Ltd If user selects Manual option, select Print Now and press <Enter> to print measurement data. ★Note: Please set to Printer mode in RS-232 menu before print operation. 4.7 Factory Settings Factory Settings provides the function for reset all the parameters which has been modify by users.

  • Page 60: Communication Protocol

    BSWA 308/309 BSWA Technology Co., Ltd 5. RS-232 Communication Protocol The Sound Level Meter BSWA 308/309 has an RS-232 serial interface. User can modify the configuration of the sound level meter via a serial interface and control the sound level meter to run and to stop, and get the current measurement parameters and results for further processing.

  • Page 61: Start/Stop Of The Block Transfer

    BSWA 308/309 BSWA Technology Co., Ltd A typical command block or response block consists of “starting character, ID, attribute character, command or data, end character, block check character, carriage returns, line feeds”, as shown below: <STX> ATTR Command or Data <ETX>...

  • Page 62: Bcc (Block Check Character)

    BSWA 308/309 BSWA Technology Co., Ltd Name Meaning ‘C’ Command Block ‘A’ Response Block <ACK> Normal Response <NAK> Error Response 5.2.4 BCC (Block Check Character) BCC check bit which include in block is calculated by the sender. The receiver can calculate the block’s BCC value and will compare with the BCC value contained in the send block.

  • Page 63: Recovery From Transmission Errors

    BSWA 308/309 BSWA Technology Co., Ltd Where: ATTR=’A’. If more than one response data, each data should be separated by a comma ‘,’. (3) Normal Response: sent by the sound level meter. <STX> ATTR <ETX> <CR> <LF> Byte Where: ATTR=<ACK>。...

  • Page 64: Flow Control

    BSWA 308/309 BSWA Technology Co., Ltd (3) Instruction Error The sound level meter may not recognize the instruction received due to the computer sends an undefined instruction, or unexpected error has occurred during transmission. When the above errors occur, the sound level meter will return a NAK block, which contains the error code 0001H.

  • Page 65: Rated Parameters

    BSWA 308/309 BSWA Technology Co., Ltd (1) Ensure that no same ID of sound level meter in each network. (2) User cannot broadcast command which can return any data. 5.2.9 Rated Parameters Name Min. Rated Max. Description Response time of Time-out processing should be —...
  • Page 66 BSWA 308/309 BSWA Technology Co., Ltd Error response: —► Set Instruction Sound Level Computer ◄— Meter Return NAK (3) Query command: Normal response: —► Query Instruction Sound Level Computer ◄— Meter Return Data Error response: —► Query Instruction Sound Level Computer ◄—...

  • Page 67: Instruction List

    BSWA 308/309 BSWA Technology Co., Ltd 5.3.1 Instruction List IDXp1: Setup ID ......................69 IDX?: Query ID ......................69 BRTp1: Set the RS-232 Baud Rate ................70 BRT?: Query The RS-232 Baud Rate Setting ..............70 XONp1: Set the Flow Control ..................71 XON?: Query Flow Control Setting ................
  • Page 68 BSWA 308/309 BSWA Technology Co., Ltd STSp1_p2_p3……p11_p12: Set Statistical ..............80 STS?: Query Statistical ....................81 HISp1_p2: Set Time History ..................81 HIS?: Query Time History Setting .................. 82 OCSp1_p2……p13_p14: Set Octave Setting ..............82 OCS?: Query Octave Setting ..................83 CUSp1_p2_p3_p4: Set Custom Measure ..............
  • Page 69 BSWA 308/309 BSWA Technology Co., Ltd GPD?: Query GPS Setting .................... 94 VER?: Query About Information ..................94 LNGp1: Set Language ....................95 LNG?: Query Language Setting ..................95 OUTp1_p2_p3_p4: Set Output ..................96 OUT?: Query Output Setting ..................96 RES: Apply Factory Settings ..................

  • Page 70: Instruction Format

    BSWA 308/309 BSWA Technology Co., Ltd 5.3.2 Instruction Format In this section, “☐☐☐” on behalf of the 3 characters of the instruction, “p1, p2 ..” on behalf of the parameter “d1, d2 ...” means the data, “_” means a space.

  • Page 71: Instruction Describe

    BSWA 308/309 BSWA Technology Co., Ltd 5.3.3 Instruction Describe Note in This Section:  In the following description, the value, range and default value of parameter are show as ASCII code.  The default value means the sound level meter just delivery to user or restore to the factory settings.
  • Page 72 BSWA 308/309 BSWA Technology Co., Ltd Example: query ID. 02 01 43 49 44 58 3F 03 29 0D 0A Return: the current ID 001. 02 01 41 30 30 31 03 70 0D 0A BRTp1: Set the RS-232 Baud Rate ★Note: When the BRT instruction is correctly received by the sound level meter, it will return...
  • Page 73 BSWA 308/309 BSWA Technology Co., Ltd XONp1: Set the Flow Control Instruction Parameters p1: Flow control mode; 0=Hardware flow control; Explanation 1=Software flow control; Default: 1 ASCII Byte Return ACK / NAK Example: set to software flow control mode. 02 01 43 58 4F 4E 31 03 2B 0D 0A Return: ACK.
  • Page 74 BSWA 308/309 BSWA Technology Co., Ltd Default: 1 ASCII Byte Return ACK / NAK Example: set to enable response. 02 01 43 52 45 54 31 03 31 0D 0A Return: ACK. 02 01 06 03 06 0D 0A RET?: Query Response Mode Setting...
  • Page 75 BSWA 308/309 BSWA Technology Co., Ltd Example: set the sound level meter mode. 02 01 43 4D 45 4D 31 03 37 0D 0A Return: ACK. 02 01 06 03 06 0D 0A MEM?: Query Measurement Mode Setting Instruction Parameters...
  • Page 76 BSWA 308/309 BSWA Technology Co., Ltd 02 01 43 43 41 4C 31 31 33 2E 38 03 28 0D 0A Return: ACK. 02 01 06 03 06 0D 0A Return again after calibration finished: ACK 02 01 06 03 06 0D 0A...
  • Page 77 BSWA 308/309 BSWA Technology Co., Ltd Instruction Parameters Explanation Query parameter: ? ASCII Byte Returns the most recent 4 group history of calibration. Format “Year/Month/day, hour:minute:second, calibration factor, code”. Return Code: M=By Measurement, F=By Calibration Factor. Example: query the calibration history.
  • Page 78 BSWA 308/309 BSWA Technology Co., Ltd 35H, 39H Byte 1 1 1 Returns: Return 0=setting succeed, MicroSD card is OK; 1=setting succeed, but the MicroSD card is abnormal; 2=setting succeed, but no MicroSD card detected. Example: set delay as 2s, integral period as 5m, repeat as infinite, SWN logger enable, SWN logger step as 0.2s, CSD logger enable, CSD logger step as 2s.
  • Page 79 BSWA 308/309 BSWA Technology Co., Ltd 02 01 41 30 32 32 2E 38 7E 31 33 33 2E 38 2C 30 31 32 2E 38 7E 31 33 33 2E 38 2C 30 34 34 2E 38 7E 31 33 36 2E 38 03 38 0D 0A...
  • Page 80 BSWA 308/309 BSWA Technology Co., Ltd 3=Z; Default: 0 2=LEQ; 2=MAX; Default: 0 3=MAX; 3=MIN; 4=MIN; Default: 0 Default: 0 ASCII Byte Return ACK / NAK Example: set Profile1 as A, Fast, SPL and save LEQ. 02 01 43 50 52 31 30 20 30 20 30 20 30 03 50 0D 0A Return: ACK.
  • Page 81 BSWA 308/309 BSWA Technology Co., Ltd Except the instruction is “PR3”, all others are same to the “PR1?”. ALMp1: Set Alarm Threshold Instruction Parameters p1: Alarm threshold; Explanation Range: 20~200; Default: 100 ASCII 31H, 30H, 30H Byte Return ACK / NAK Example: setting alarm threshold as 100dB.
  • Page 82 BSWA 308/309 BSWA Technology Co., Ltd Byte Return ACK / NAK Example: enable 3Profile, statistical, time history, custom, GPS. 02 01 43 45 54 46 31 20 31 20 31 20 31 20 31 03 25 0D 0A Return: ACK...
  • Page 83 BSWA 308/309 BSWA Technology Co., Ltd Example: set filter as B, detector as I, percentage as 10, 20, 30, 40, 50, 60, 70, 80, 90 and 99. 02 01 43 53 54 53 31 20 32 20 31 30 20 32 30 20 33 30 20 34 30 20 35 30 20 36 30 20 37 30 20 38 30 20 39 30 20 39 39 03 35 0D 0A Return: ACK.
  • Page 84 BSWA 308/309 BSWA Technology Co., Ltd HIS?: Query Time History Setting Instruction Parameters Explanation Query parameter: ? ASCII Byte Return Return time history setting Example: query time history setting. 02 01 43 48 49 53 3F 03 2E 0D 0A Returns: the current data sources=Profile2, duration=2min.
  • Page 85 BSWA 308/309 BSWA Technology Co., Ltd 33H，38H，20H，33H，38H，20H，33H， 38H，20H，33H，38H，20H，33H，38H， 20H，33H，38H，20H，33H，38H，20H， 33H，38H，20H，33H，38H，20H，33H， 38H，20H，33H，38H，20H，33H，38H Byte 80+39 (space) Return ACK / NAK Example: set Filter as C-weighting; all the threshold values are 38. 02 01 43 4F 43 53 33 20 32 20 33 38 20 33 38 20 33 38 20 33 38 20 33 38 20 33 38...
  • Page 86 BSWA 308/309 BSWA Technology Co., Ltd 2C 30 33 38 2E 30 2C 30 33 38 2E 30 2C 30 33 38 2E 30 2C 30 33 38 2E 30 2C 30 33 38 2E 30 2C 30 33 38 2E 30 2C 30 33 38 2E 30 2C 30 33 38 2E 30...
  • Page 87 BSWA 308/309 BSWA Technology Co., Ltd Custom 7 A, Fast, SD Custom 8 A, Fast, SPL Custom 9 B, Fast, SPL Custom 10 C, Fast, SPL Custom 11 Z, Fast, SPL Custom 12 A, Fast*, SEL Custom 13 A, Fast*, E...
  • Page 88 BSWA 308/309 BSWA Technology Co., Ltd Example: set the Timer as switch: ON, start day: Ignore, start hour: 12:00, repeat period: 1m. 02 01 43 54 49 53 31 20 30 20 31 32 20 30 20 31 03 0E 0D 0A...
  • Page 89 BSWA 308/309 BSWA Technology Co., Ltd Return: ACK 02 01 06 03 06 0D 0A LDN?: Query Lden Period Setting Instruction Parameters Explanation Query parameter: ? ASCII Byte Return the Lden period setting, which is: day time, evening time, Return...
  • Page 90 BSWA 308/309 BSWA Technology Co., Ltd Byte Return Return contrast setting Example: query contrast setting 02 01 43 43 4F 4E 3F 03 3E 0D 0A Returns: the current contrast is 7 02 01 41 30 37 03 46 0D 0A...
  • Page 91 BSWA 308/309 BSWA Technology Co., Ltd BAT?: Query Battery State Instruction Parameters Explanation Query parameter: ? ASCII Byte Returns the power state and supply voltage Return Power state: 0=Battery; 1=External power; 2=USB power Supply voltage: xx.xx V Example: query battery state 02 01 43 42 41 54 3F 03 2B 0D 0A Returns: the current battery state is external power supply, supply voltage is 9.24V...
  • Page 92 BSWA 308/309 BSWA Technology Co., Ltd Example: query trigger setting 02 01 43 54 52 47 3F 03 3D 0D 0A Returns: the current trigger setting is OFF 02 01 41 30 03 71 0D 0A DATp1_p2_p3_p4: Set Date Instruction p1: Date format;...
  • Page 93 BSWA 308/309 BSWA Technology Co., Ltd HORp1_p2_p3: Set Time Instruction p1: Hour; p2: Minute; p3: Second; Explanation Range: 0~23h Range: 0~59m Range: 0~59s ASCII Byte Return ACK / NAK Example: set the time as 18:37:30 02 01 43 48 4F 52 31 38 20 33 37 20 33 30 03 18 0D 0A...
  • Page 94 BSWA 308/309 BSWA Technology Co., Ltd Example: set auto power off as OFF 02 01 43 50 57 4F 34 03 3F 0D 0A Return: ACK 02 01 06 03 06 0D 0A PWO?: Query Auto Power Off Setting Instruction...
  • Page 95 BSWA 308/309 BSWA Technology Co., Ltd OPM?: Query Boot Mode Setting Instruction Parameters Explanation Query parameter: ? ASCII Byte Return Return boot mode setting Example: query boot mode 02 01 43 4F 50 4D 3F 03 2E 0D 0A Return: the current boot mode is normal...
  • Page 96 BSWA 308/309 BSWA Technology Co., Ltd Example: query USB mode setting 02 01 43 55 4D 44 3F 03 20 0D 0A Return: the current USB mode is modem mode 02 01 41 32 03 73 0D 0A GPDp1_p2: Set GPS Instruction p1: GPS switch;...
  • Page 97 BSWA 308/309 BSWA Technology Co., Ltd Byte Return Return the about information Example: query about information 02 01 43 56 45 52 3F 03 3D 0D 0A Returns: type=309S, class=2, S/N=490001, version=3.00.141020, HWID=P0274.03.B11 02 01 41 33 30 39 53 2C 32 2C 34 39 30 30 30 31 2C 33 2E 30 30 2E 31 34...
  • Page 98 BSWA 308/309 BSWA Technology Co., Ltd OUTp1_p2_p3_p4: Set Output Instruction p1: Filter of p3: Mode p4: Output of SLM; Detector of of SLM; Octave; 0=A; SLM; 0=SPL; 0=LAeq; 1=B; 0=Fast; 1=LEQ; 1=LBeq; Explanation 2=C; 1=Slow; 2=Peak; 2=LCeq; 3=Z; 2=Imp.; Default: 0 3=LZeq;...
  • Page 99 BSWA 308/309 BSWA Technology Co., Ltd Byte None Return ACK / NAK Example: apply the factory settings 02 01 43 52 45 53 03 07 0D 0A Return: ACK. Wait at least 6 seconds after receipt of ACK 02 01 06 03 06 0D 0A...
  • Page 100 BSWA 308/309 BSWA Technology Co., Ltd second after received this instruction. Single return: The sound level meter will return the measurements data on time after received the instruction. Continuous return: Automatically return the measurements data every second after received the instruction.
  • Page 101 BSWA 308/309 BSWA Technology Co., Ltd TPRp1_?: Query 3-Profile Screen Data Instruction p1: Return manner; Query parameter: ? 0=Stop return; Explanation 1=Single return; 2=Continuous return; 3=Integral end return ASCII Byte Return 3-Profile screen data Profile 1: Filter, Detector, Mode, Data...
  • Page 102 BSWA 308/309 BSWA Technology Co., Ltd Filter: 0=A, 1=B, 2=C, 3=Z Detector: 0=Fast, 1=Slow, 2=Imp. Mode: 0=SPL Group 1 LN percentages and LN statistics …… Group 10 LN percentages and LN statistics Overload/under-range indicator: 0=Normal, 1= current overload, 2=current under-range, 3=overload occurred within the integral period,...
  • Page 103 BSWA 308/309 BSWA Technology Co., Ltd Example: query custom measure data 02 01 43 44 43 55 31 20 3F 03 3F 0D 0A Returns: the current custom measure data: Group 0: A-weighting, Fast*, L10, 065.4dB; Group 1: A-weighting, Fast*, L20, 065.4dB; Group 2: A-weighting, Fast*, L60, 065.3dB;...
  • Page 104 BSWA 308/309 BSWA Technology Co., Ltd Group 0: LAF, LAS, LAI, LBF, LBS, LBI, LCF, LCS, LCI, LZF, LZS, LZI Group 1: LAFsd, LASsd, LAIsd, LBFsd, LBSsd, LBIsd, LCFsd, LCSsd, LCIsd, LZFsd, LZSsd, LZIsd Group 2: LAsel, LBsel, LCsel, LZsel...
  • Page 105 BSWA 308/309 BSWA Technology Co., Ltd Example: query 1/1 octave data 02 01 43 44 4F 54 31 20 3F 03 32 0D 0A Returns: the current 1/1 octave band filter is C-weighting, and data are: LAeq=064.7dB, LBeq=066.0dB, LCeq=066.8dB, LZeq=067.1dB, 8Hz=030.7dB,...
  • Page 106 BSWA 308/309 BSWA Technology Co., Ltd 500Hz=056.2dB, 630Hz=056.3dB, 800Hz=056.1dB, 1kHz=055.6dB, 1.25kHz=054.9dB, 1.6kHz=054.2dB, 2kHz=053.0dB, 2.5kHz=051.8dB, 3.15kHz=050.4dB, 4kHz=048.8dB, 5kHz=046.9dB, 6.3kHz=044.6dB, 8kHz=041.8dB, 10kHz=038.1dB, 12.5kHz=033.3dB, 16kHz=026.2dB, 20kHz=015.0dB, normal (no overload/under-range) 02 01 41 31 2C 30 36 34 2E 38 2C 30 36 36 2E 30 2C 30 36 36 2E 39 2C 30...
  • Page 107 BSWA 308/309 BSWA Technology Co., Ltd Note 3: Overload/under-range indicator: 0=Normal, 1= current overload, 2=current under-range, 3=overload occurred within the integral period, 4=under-range occurred within the integral period Note 4: If user choose to return at the integral end, the data is still returned once per second, but for the data related to the integral period only return at the integral period arrived, otherwise return "---.
  • Page 108 BSWA 308/309 BSWA Technology Co., Ltd CSD: Save Custom Data into MicroSD Instruction Parameters Explanation None ASCII None None Byte None Return state: 0= Stored successfully, MicroSD OK; Return 1= Failure to store, MicroSD error; 2=No MicroSD. Example: Save CSD...
  • Page 109 BSWA 308/309 BSWA Technology Co., Ltd 6. Operation Notes 6.1 Operation  Please minimize the influence of vibration when using sound level meter, mechanical vibration could affect indicated levels at the lower boundary of the measurement range at frequencies within the range of the sound level meter (10Hz~20kHz).
  • Page 110 BSWA 308/309 firmware can be update via USB port. Following items need to be prepared:  BSWA 308/309 sound level meter (HWID: P0274 or above) and keep power off;  MiniUSB cable (include in sales package);  External power supply (include in sales package);...
  • Page 111 BSWA 308/309 BSWA Technology Co., Ltd After driver installation, connect sound level meter to computer via USB cable, a new device named Silicon Labs CP210x USB to UART Bridge (COMx) could be found in Device Manager. ★Note: Power sound level meter by external supply when connect to computer.
  • Page 112 P0274 or above. The old type of HWID: P0115 cannot update firmware by user. Following list the difference between old type and new type:  In About page, P0115 displays type 308/309, while P0274 displays type 308S/309S.  RS-232 port of P0115 using Lemo 3-pin socket, while P0274 using PS/2 6-pin socket.
  • Page 113 BSWA 308/309 BSWA Technology Co., Ltd Please refer to the product warranty promise in sales contract. Do not try to open or repair the device by customer. Any unauthorized behavior will result in loss warranty of this product 6.6 Customer Service Phone Number...
  • Page 114 BSWA 308/309 BSWA Technology Co., Ltd Annex 1 Glossary  Frequency Weighting : Difference, as a specified function of frequency, between the level of the frequency weighted signal indicated on the display device and the corresponding level of a constant amplitude sinusoidal input signal. Level difference is expressed in decibels (dB).
  • Page 115 BSWA 308/309 BSWA Technology Co., Ltd  SEL : Sound exposure level. Ten times the logarithm to the base 10 of the ratio of a sound exposure to the reference value. It sometime called single event level.  LN: Statistical analysis result. The noise level exceeded for N% of the measurement period.
  • Page 116 Recommend to use CA111/CA114/CA115 sound calibrator for sensitivity calibration before the measurement. The manual of sound calibrator provide the equivalent free field sound level for 1/2” microphone as shown in the following table: Type of Sound Calibration Sound Level for BSWA 308/309 Frequency Calibrator Nominal 94dB...
  • Page 117 BSWA 308/309 BSWA Technology Co., Ltd Annex 3 Corrections for the Typical Effects of Reflections from the Case of Sound Level Meter and Diffraction of Sound around the Microphone Corrections for the Typical Effects of Reflections from the Case of the Sound Level Meter and Diffraction of Sound around the Microphone -0.5...
  • Page 118 BSWA 308/309 BSWA Technology Co., Ltd Annex 4 Corrections of Windscreen in Free Field Corrections of Windscreen in Free Filed -0.5 -1.0 -1.5 -2.0 Freq. [Hz] Value [dB] Freq. [Hz] Value [dB] Freq. [Hz] Value [dB] *50.119 -0.04 *398.11 0.06 3162.3...
  • Page 119 BSWA 308/309 BSWA Technology Co., Ltd Annex 5 Corrections of Electrostatic Actuator The following corrections are measured by BSWA EA002 electrostatic actuator and AS001 power supply. Corrections of Electrostatic Actuator 10.0 Freq. [Hz] Value [dB] Freq. [Hz] Value [dB] Freq. [Hz] Value [dB] Freq. [Hz] Value [dB] 0.000...
  • Page 120 -8.7 -3.3 +1.3 +1.2 -0.5 -4.4 -9.7 [dB] B-weighting -43.2 -28.2 -17.1 -9.4 -4.3 -1.4 -0.3 -0.5 -2.3 -6.3 -11.6 [dB] C-weighting -17.4 -8.4 -3.0 -0.8 -0.2 -0.1 -0.6 -2.4 -6.4 -11.7 [dB] Note *: only available for BSWA 308.
  • Page 121 BSWA 308/309 BSWA Technology Co., Ltd Annex 7 Specification of 1/1 Octave Band Filter 1/1 octave filter was designed by the Butterworth filter and base 10 system. The specification of each filter as the shown in the following figure: 8Hz ~ 250Hz Octave Filter Response 10.0...
  • Page 122 BSWA 308/309 BSWA Technology Co., Ltd Annex 8 Specification of 1/3 Octave Band Filter 1/3 octave filter was designed by the Butterworth filter and base 10 system. The specification of each filter as the shown in the following figure: 6.3Hz ~ 20Hz Octave Filter Response 10.0...
  • Page 123 BSWA 308/309 BSWA Technology Co., Ltd 100Hz ~ 315Hz Octave Filter Response 10.0 -10.0 -20.0 -30.0 -40.0 -50.0 -60.0 -70.0 -80.0 -90.0 -100.0 1000 100Hz 125Hz 160Hz 200Hz 250Hz 315Hz 400Hz ~ 1.25kHz Octave Filter Response 10.0 -10.0 -20.0 -30.0 -40.0...
  • Page 124 BSWA 308/309 BSWA Technology Co., Ltd 1.6kHz ~ 5kHz Octave Filter Response 10.0 -10.0 -20.0 -30.0 -40.0 -50.0 -60.0 -70.0 -80.0 -90.0 -100.0 1000 10000 1.6kHz 2kHz 2.5kHz 3.15kHz 4kHz 5kHz 6.3kHz ~ 20kHz Octave Filter Response 10.0 -10.0 -20.0 -30.0...
  • Page 125 BSWA 308/309 BSWA Technology Co., Ltd Annex 9 Mid-band Frequencies for 1/1 Octave Band and 1/3 Octave Band Filters Base 10 Exact f Nominal Midband 1/1 Octave Band 1/3 Octave Band [Hz] Frequency [Hz] 6.3096 7.9433 10.000 12.589 12.5 15.849 19.953...
  • Page 126 BSWA Technology Co., Ltd. Room 1003, North Ring Center, No.18 Yumin Road, Xicheng District, Beijing 100029, China Tel: 86-10-5128 5118 Fax: 86-10-8225 1626 E-mail: info@bswa-tech.com URL: www.bswa-tech.com...

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