BENETECH GT1355 Digital Sound Level Meter Instruction Manual

: August 30, 2024
: BENETECH

Table of Contents

GT1355 Digital Sound Level Meter
Specifications
Product Usage Instructions
I. Product Introduction
II. Operation Instructions
III. PC Software
IV. Other
Q: How do I calibrate the Sound Level Meter?

GT1355 Digital Sound Level Meter

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Specifications

Calibration sound source: 94dB@1KHZ standard
calibration instrument
Measurement range: 0~50
Accuracy: 10~80%RH
Resolution: 31,000
Frequency weighting: A
Frequency response: 31,000
Time weighting: FAST
Sampling rate: 1605631mm(Excluding sponge
ball)
Rated current: Approx 126g(Excluding sponge
ball)
Standby current: –
Power supply: USB
Charging time: 1.5h
Duration of service: 8h
Data storage: 31,000
Microphone: 1/2-inch polarization capacitance
microphone
Operating temperature: 0~50
Operating humidity: 10~80%RH
Dimension: 1605631mm(Excluding sponge
ball)
Weight: Approx 126g(Excluding sponge
ball)

Product Usage Instructions

I. Product Introduction

A. Introduce
This Sound Level Meter is designed for noise measurement in various
environments like factories, offices, traffic roads, and homes.

B. Features
– Meets international standards: IEC PUB 651 TYPE2 and US national
standard ANSI S1.4 TYPE2.

C. Component Names
1. Sponge ball (wind noise prevention)
2. Alarm light
3. LCD display
4. HOLD button
5. MAX button
6. F/S button
7. A/C button
8. Power button
9. Capacitance microphone
10. Tripod fixed screw aperture
11. Calibration knob
12. Type-C interface

II. Operation Instructions

III. PC Software

A. Requirements of Computer Configuration

B. Software Download

C. Connection Status

D. Software Instruction

IV. Other

A. Attentions

B. Maintenance

Frequently Asked Questions (FAQ)

Q: How do I calibrate the Sound Level Meter?

A: To calibrate the Sound Level Meter, follow
these steps:

Use a 94dB@1KHZ standard calibration instrument.
Set the frequency weighting to A and time weighting to FAST on
the meter.
Carefully insert the microphone into a 1/2-inch hole in the
standard audio source (94dB@1KHz).
Turn on the power switch of the standard sound source and
adjust the potentiometer until the LCD displays 94.0.

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A

B

C

D

E

1

2

7161355002

GT1355 BENETCH

105G

3

95*130mm

3

±1.0mm

20P

4

10

Enter the website “www.downloadsupport.tech” in the browser, press

enter and enter the page to find the menu “Product Catalog>>”.Click into

5

the page to find the software installation package “SoundLab 1356.zip”.

Click the download button to directly extract the “zip package” after

downloading. Double click on “SoundLabSetup.exe” to install.

6
A DOCUMENT NO.: QR-208/A

APPROVALS NAME

DATE

6 SHENZHEN JUMAOYUAN SCIENCE AND TECHNOLOGY CO., LTD.

DRAWN BY WDJ 2024-01-04

CHECKED BY

GT1355 BENETCH

APP. BY

SIZE A4

7161355002

VER.A0

CUSTOMTER

SCALE 1:1 PART Number: X-XXX-XXX-XX SHEET 1 OF 1

B

C

D

E

MODEL: GT1355
Sound Level Meter
Instruction Manual

GT1355 OVER REC FULL
Max

dBA dBC

FAST

SLOW

USB

Digital Sound Level Meter

HOLD

MAX

A/C

F/S

Version:GT1355-EN-00

Contents
I. Product introduction
A. Introduce………………………………………………………..1 B. Features…………………………………………………………1 C. Component names……………………………………………2 D. Specifications………………………………………………….3 E. Calibration………………………………………………………4
II. Operation instructions
A. Power on/off…………………………………………………….5 B. Data HOLD……………………………………………………..5 C. DATE/TIME……………………………………………………..6 D. Maximum mode………………………………………………..6 E. High/low alarm value………………………………………….7 F. A/C Frequency weighting selection………………………..8 G. F/S Time weighting selection……………………………….8 H. Data record……………………………………………………..9 I. Delete record……………………………………………………9
III. PC software
A. Requirements of computer configuration……………….10 B. Software download………………………………………….10 C. Connection status……………………………………………11 D. Software instruction…………………………………………11
IV. Other
A. Attentions……………………………………………………..17 B. Maintenance………………………………………………….17

I. Product introduction
A. Introduce
This Sound Level Meter has been designed to meet the measurement requirement of noise engineers, noise quality control and health prevention in various environments, such as noise measurement in factory, office, traffic road, family and all other noise measurement applications.
B. Features
1. Real-time measurement of various environmental noises 2. A/C Frequency weighting selection 3. Fast/Slow Time weigting selection 4. Three-color light alarm 5. Maximum 6. Data HOLD 7. Data storage: 31,000 data record function 8. Data Read(only on PC) and Delete 9. Automatic shutdown for about 10 minutes without button operation 10. Display date and time 11. USB charging and PC communication: Connect with the PC through USB, provides data record download, real-time data sampling analysis, and printing graph&data functions. 12. This Sound Level Meter was designed according to following standards:
a. International electrician committee standard:IEC PUB 651 TYPE2 b. US national standard: ANSI S1.4 TYPE2
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C. Component name

1

9

2

3

4

Digital Sound Level Meter

8

HOLD

5

MAX

A/C

7

F/S
6

12

10 11

1. Sponge ball (when outdoor use please put on, prevent wind blowing noise disturbing the unit reading)
2. Alarm light 3. LCD display 4. HOLD button 5. MAX button

6. F/S button 7. A/C button 8. Power button 9. Capacitance microphone 10. Tripod fixed screw aperture 11. Calibration knob 12. Type-C interface

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D. Specifications
Calibration sound source Measurement range
Accuracy
Resolution Frequency weighting Frequency response Time weighting
Sampling rate
Rated current Standby current Power supply Charging time Duration of service Data storage
Microphone
Operating temperature Operating humidity Dimension Weight

94dB@1KHz 30~130 dB(A), 35~130dB(C) ±1.5dB(Reference sound pressure standard,94dB@1KHz) 0.1dB A/C 31.5Hz~8500Hz FAST/SLOW FAST: 8 times/second SLOW: 1 times/second 70mA 5uA 3.7V lithium battery /1000mAh
1.5h 8h 31,000 1/2-inch polarization capacitance microphone 0~50 10~80%RH 1605631mm(Excluding sponge ball) Approx 126g(Excluding sponge ball)

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E. Calibration
1. Please use 94dB@1KHZ standard calibration instrument 2. Setting on sound level meter: Frequency weighting is A,Time weighting is FAST 3. Insert the microphone carefully into a 1/2-inch hole in the standard audio source (94dB@1KHz). 4. Turn on the power switch of the standard sound source, adjust the potentiometer at the circular hole in the battery door with slotted screwdriver, and make the LCD display 94.0
Calibration knob
dBA FAST Digital Sound Level Meter
HOLD
F/S
Note: Our products are all well calibrated before Shipment. Recommended recalibration cycle: 1 year.
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MAX

A/C

II. Operation instructions
A. Power on/off
1. Power on: When shutting down, short press the power button to turn on the device.
After about 1~2 second of full screen display, the real-time measurement interface will be displayed; 2. Shutdown:
Power on status, long press or short press the power button to shutdown; 3. Automatic shutdown:
Automatic shutdown for about 10 minutes without button operation; 4. Cancel automatic shutdown:
When shutting down, long press the power button to turn on the device. After full screen display, if [UOF] is displayed, the automatic shutdown will be cancelled (only valid for this startup, default automatic shutdown for next startup, need to be cancelled again).
B. Data HOLD
On the measurement interface, short press the HOLD button to display [ ] data lock; Short press the HOLD button again to release the data, [ ] disappears, and continue measuring.
OVER REC FULL
Max

dBA dBC

FAST

SLOW

USB

Full Screen Display

Cancel Automatic Shutdown
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dBA
FAST
Data HOLD

C. DATE/TIME
1. Date/Time setting: Long press the Hold button to enter the DATE/TIME setting mode.
Short press the A/C button to switch between year – month – day – hour minute – second – exit setting mode successively (short press the MAX button to switch in reverse order between second – minute -… – year – exit setting), the value blinks when selected. Short press the HOLD button or F/S button to increase or decrease the value. Long press the HOLD button or F/S button to increase or decrease the value; 2. DATE/TIME display switch:
Long press the F/S button to switch the DATE/TIME display.

dBA

DATE Setting

TIME Setting

SLOW
DATE Display

FAST
TIME Display

D. Maximum mode
1. On the measurement screen, short press the MAX button to enter the maximum measurement mode. The screen will display [MAX]. 2. Maximum mode: The value will be the maximum noise value after entering the mode. The value will not be updated until the measured noise value is larger. Short press the MAX button again to return to the realtime measurement interface (the screen does not display [MAX]).

Max
dBA FAST
Maximum mode

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E. High/low alarm value
1.High/low alarm value setting: Long press MAX button to enter alarm value setting, then the screen
will display [ ]. Short press MAX button to switch high/low alarm value setting. Short press HOLD button or F/S button to increase or decrease alarm value. Long press HOLD button or F/S button to fast increase or decrease alarm value. Long press the MAX button again to exit the alarm setting.
High alarm: [MAX] will be displayed, and indicator light will be red; Low alarm: [MAX] will not be displayed, and the indicator light will be yellow. 2.Measurement display: High alarm: When the noise value is greater than or equal to the high alarm value, the screen will display [ ], and the red light will be on (if the indicator function is off, it will not be on); Low alarm: When the noise value is greater than or equal to the low alarm value, the screen will display [ ], and the yellow light will be on (if the indicator function is off, it will not be on); 3. Indicator light on/off: After entering the alarm value setting, press the A/C button to turn on/off the indicator. Pay attention to the change of the indicator on the panel. If the indicator is on, it means on; if it is off, it means off.
Max

High alarm value setting

Low alarm value setting

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F. A/C Frequency weighting selection
On the measurement interface, short press the A/C button to switch between A (dBA)/C (dBC) weighting
A-Weighting for general sound level measurements. C-Weighting for checking the low-frequency content of sounds.
G. F/S Time weighting selection
On the measurement interface, short press the F/S button to switch between FAST/ SLOW
FAST is to pick up the current reading; SLOW is to pick up the reading of average within 1 second.

dBC

FAST

C (dBC) FAST

dBA
SLOW
A (dBA) SLOW

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H. Data record
1. Enter the recording mode: After startup, long press the A/C button to enter the recording mode
setting, and the screen will display [REC]; 2. Record interval setting:
After entering this mode, press the HOLD button or F/S button to set the record interval time (unit: second), and long press the button to fast increase or decrease; The value ranges from 1 to 99 seconds. 3. Short press the A/C button to start recording data. The screen displays [REC] and blinks [ ]. Long press the A/C button again to exit the recording mode. 4. When recording, it will not automatically shut down, long press the power button to shut down.

I. Delete record

Enter the MAX mode (screen will display [MAX]), long press the A/C button until the screen displays [CLR], and return to the measurement interface. At this time, no [MAX] is displayed, and record deletion is complete.

REC

Data record setting

dBA
FAST
Start recording

dBA
FAST
Delete records

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III. PC software
A. Requirements of computer configuration
1. CPU: Pentium III 600MHZ or above 2. One free available USB connecting interface 3. The lowest screen resolution of monitor is 800*600 (or much higher), true color 4. At least 8MB available memory 5. At least 50MB available disk memory 6. Operation system: Microsoft windows XP/VISTA/windows 7
B. Software download
Enter the website “www.benetechco.net” in the browser, press enter and enter the page to find the menu “Support”-“Download Catalog”.Click into the page to find the software installation package “SoundLab 1356.zip”. Click the download button to directly extract the “zip package” after downloading. Double click on “SoundLabSetup.exe” to install.
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C. Connection status
1. Connected to device: “Connected” appears in the bottom left corner of the PC; “USB” appears on the lower right corner of the product screen.
2. Disconnected to device: “Disconnected” is displayed in the bottom left corner of the PC; “USB” is not displayed onthe lower right corner of the product screen.
Connected
PC
D. Software instruction
1. Softwar window:
Menu bar

dBA

FAST

USB

Product screen

Toolbar

Status

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2. Menu bar:

Command Real Time Measure Open Save Import Export Print Print setup Close Close all Exit
Config
Language Help About

Function Real-time data measurement, the measurement data will be displayed in real time on the PC software screen Open measuring data file in Lab format Save the measurement data Import the measurement data saved by the product into PC software Export the measuring data into excel fomat Print data sheet Printer setting Close the current page Close all pages Exit PC software Selectable Measurement Range, Sample Speed, A/C weight, MAX work Mode, Low and high dB Alarm, Company’s Name (i.e. exported data header), Number decimal and thousand.
English,Simplified or Traditional Chinese Software problem feedback Software version description

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3. Toolbar

Button

Function Real-time data measurement, the measured data in real time will be displayed on computer screen Import the measurement data saved by the product into PC software Open measuring data file that is saved as Lab format Save the measurement data Save the measurement data as Excel document Print data sheet System setup Close the current page Exit software

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4. System setup (Config) (1) SPL Unit Setting: Measurement Range,Sample Speed,A/C Weight,
MAX Work Mode.
(2) PC Software Setting: Low/High dB Alarm, Alarm Sound switch.
(3) Miscellaneous Option: Company’s Name (i.e. exported data header), Number decimal and thousand.
Note: The system settings on the PC do not affect product settings. The two are independent from each other.
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5. Real Time Measure

Button

Function Click to start Real Time Measure Click to stop Real Time Measure Click to store real-time measuring data, input file name in popup window, click to save the document format of Lab. Click to clear all the measuring data Click to print curve diagram Zoom in curve diagram Zoom out curve diagram Reset zoom, resume to defaulted value Move curve diagram

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6. Import -16-

IV. Other
A. Attentions 1. Environment conditions on operation: (1) 2000 meters high below; (2) Temperature:0~40 (3) Relative humidity: 80%RH
2. Do not store or use the unit in following conditions: (1) Splashes of water or high levels of dust. (2) Air with high salt or sulphur content. (3) Air with other gases or chemical materials. (4) High temperature or humidity or direct sunlight.
3. Never impact the unit or used on humidity conditions.
B. Maintenance
1. Maintenance of battery: (1) When you do not use this product for a long time, you need to charge it once a month to avoid affecting the battery life. (2) After startup, when the power supply is insufficient, please charge it in time.
2. Cleaning the casing: Never use alcohol or thinner to clean the unit casing that will especially erode the LCD surface;just clean the unit lightly as needed with little clean water.
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Specific Declarations a. We reserve the rights of the update and amendment of the product design and the manual which are subject to change without further notification. b. Dispose of battery should in accordance with local laws and regulations. c. Our company shall hold no any responisibility resulting from using output from this product as an direct or indirect evidence. d. We reserves the right to modify product design and specification without notice.