TENMARS ST-107 Integrating Sound Level Meter User Manual

Safety Precautions
Before using the Integrating Sound Level Meter, please read the safety precautions in the user manual to ensure safe operation.

Preliminary Description
Get familiar with the basic functions and features of the ST-107/ST-107S as described in the manual.

Preparation for Use
Follow the steps outlined in the manual for setting up the Integrating Sound Level Meter.

SPL (LXYP) Test Mode
Instructions on how to perform sound pressure level testing using the LXYP method.

LEQ Test Mode
Details on setting up and conducting LEQ testing with the Integrating Sound Level Meter.

Software Installation
Guide on how to install the required software for the Integrating Sound Level Meter.

Maintenance
Learn about the maintenance procedures to keep your device in optimal condition.

SAFETY PRECAUTIONS

When taking measurements:

Avoid doing measurements in humid or wet places – make sure that humidity is within the limits indicated in section “environmental conditions”.
Avoid doing measurements in presence of explosive gas, combustible gas, steam or excessive dust.

The following symbols are used:

PRELIMINARY DESCRIPTION

Integrating Sound Level Meter. It may also survey: SPL(Lxyp), Lxmax, Lxmin, Lxeq, SEL (LAE)，Lcpeak, RT60, three kind of at the same time frequency weighting (A, C, Z) and three kind of at the same time weighting (F, S, I) may simultaneously survey many kinds of appraisal target, the dynamic range is bigger than 100dB, it does not need to select the measuring range when doing measurements, the operation is simple.
Applications: Evaluation of environmental noise, Measurements of noise at workplaces, Assessment of product noise.

NOTE

CAUTION
Does not observe the warning and/or operation instruction, it’s possible to damage the instrument either its components or the operator

Do not operate the instrument at temperature and humidity environment beyond to reference conditions of chapter 13.2.1.

Keep the microphone dry and avoid severe vibration.
Wind blowing across the microphone would bring additional extraneous noise.Once using the instrument in the presence of wind, it must mount the windscreen to prevent the undesirable signals. (Refer to EN-7. Fig.1)

PREPARATION FOR USE

Initial
The instrument has been checked mechanically and electrically prior to shipment. Take care to ensure the instrument reaches you undamaged.

However, it is wise to carry out a rapid check in order to detect any possible damage that may cause during transport. If its damage, claims to the dealer immediately.

Check the packaging content according to packing list reported in 13.3.1 chapter .In case of discrepancies, contact the dealer immediately.
In the event of re-shipment of the instrument please follow the instructions reported in chapter.

Supply Voltage
The instrument is powered by batteries. When batteries are low, a low battery indication is displayed.
To replace/insert batteries as the instructions indicated in chapter.
The instrument can also be powered by the external power supply. The external power supply’s voltage is 6~9V and its maximum output current is 500mA.

CAUTION
If you don’t use the instrument for a long period, please take the batteries out to prevent eventual acid leakage from damaging the instrument

Calibration
The instrument complies with the technical specifications contained in this manual and such compliance is guaranteed for 1 year. The instrument is maybe need recalibration after one year.

Storage
After a period of storage in extreme environmental conditions exceeding the limits mentioned in paragraph 11.2.1 let the instrument return to normal measuring conditions before using it.

INSTRUMENT INSTRUCTIONS

Instrument Description

Controls Description

Microphone
Power Button
Backlight Button
Start or Pause Test Button
Frequency Weighting Select Button
Time Weighting Select Button
Set Button
Test function select button
Record dada / Reading Record dada button
Data Hold/ up arrow button.
Clock switch/left arrow button

OK button
Clock switch/right arrow button
Shift switch/end measurement/down arrow button

MICRO SD card slot
Analog/RS232 professional output
USB

DC voltage input (6V~12V)

Display Description

ST-107S Microphone

Diameter : 1/2 inch

Polarization voltage : 0V
Dynamic range : 25dBA ~140dB
Sensitivity : -32±3dB (250Hz 0dB=1V/Pa)

Free field frequency response : ±2dB(25Hz～12.5kHz)

Frequency (KHz)	Deviation of pressure
0.25	0.0
1	-0.1
2	-0.5
3	-0.6
4	-0.9
5	-1.2
6	-1.7
7	-2.2
8	-2.8
9	-3.3
10	-4.1
12.5	-6.0

Measurement Procedures

Press button turn on sound level meter，press this button again turn off sound level meter

Press button to select test function.
- Lxyp→Leq→LAE→PeakMAX→RT60
Press button to select time weighting.
- Fast→Slow→Impulse
Press button to select frequency weighting.
- A weighting→C weighting→Z weighting

Press button start test, press button again pause test
Press button stop test
Turn on the meter deform test mode is Lxyp mode; A weighting; Fast weighting

CAUTION
Wind blowing across the microphone would bring additional extraneous noise. Once using the instrument in the presence of wind with speed higher than 10m/s, it must mount the windscreen to prevent the undesirable signals. Keep the microphone dry and avoid severe vibration.

Data Hold

Press button to lock display data, press this button again to unlock

Maximum/Minimum

Press button to action MAX/MIN record mode, store maximum/minimum data, store time 99hours 59 minutes 59seconds,can press button end measure action in advance

Single Data Record

Press button each time to store the display reading and memory location in memory。

Viewing Logged Reading

Press button more than 1 sec into the viewing logged reading mode
Press or button to scroll through the readings
Press or button to change time data (hh:mm:sec→YY-MM-DD)

Press button again to exit viewing logged reading mode

Set Mode

Press button into set mode , can set 7 functions in set mode

Clock set

Press or button to select option to adjust

Press or button to change digit
Press button to store set and exit set mode
Press button no store set data, into next set mode

Auto Record Time Set

Press or button to select option to adjust

Press or button to change digit
Press button to store set and exit set mode
Press button no store set data, into next set mode

Minimum auto record time: 1 second; Maximum auto record time: 23 hours 59 minutes 59 seconds
Set auto record time equal 0 second0 disable auto record function

Auto Power Off Time Set

Press or button to change digit
Press button to store set and exit set mode

Press button no store set data, into next set mode
If you want to not auto power off, you can set auto power off time to 0
Maximum auto power off time: 99 minutes

Clear Data Logger Memory

Press button to clear data logger memory for last record

Press button to store set and exit set mode
Press button no store set data, into next set mode

Clear All Data Logger Memory

Press button LCD will flash “ALL”
Press button again clear all data logger

Press button to store set and exit set mode
Press button no store set data, into next set mode

Copy All Data Logger To micro SD Card

Before carrying on data to copy please insert micro SD card first
Copy to micro SD card file to be named this machine ID; The max support capacity of micro SD card is 32GB

This machine ID can be gone to by the user to define by oneself in the PC program, file format is ○○○○○○○○.IAR; Can define word dollar as 0~9;A~F
Press button Starts copying data logger data to micro SD Card
Press button to store set and exit set mode

Press button no store set data, into next set mode
micro SD CARD suggests use Transcend
When usage copy function, please use transformer the power (DC 6~9V/500mA)

Please change into the format of the micro SD card FAT or FAT32 formats

Auto Backup

The auto backup function is automatically copy memory data into miniSD card, and automatically delete record data
Be in use auto backup function, please use transformer power supply
Press button LCD will flash”On”, be in use automatic backup function

Press button to store set and exit set mode
Press button no store set data, into next set mode

94dB Calibration

Please first semaphore of inputing the 94 dBA@s 1 KHZ to the meter.

Right bottom LCD to display for test a value at present, Calibration range 91.0~97.0dB.

Left bottom LCD displays for the correction data that estimates to write a memory.
Press button store correction to be worth and escape from to set mode.
Press button don’t store correction to be worth and escape from to set mode.

SPL (LXYP) TEST MODE

SPL (Lxyp) test mode deform frequency weighting is A weighting; time weighting is FAST.
Press button start a Lxyp Max/Min measurement.

Press to change frequency weighting before starting a measurement .
Press button to change time weighting .
Press button pause measurement after starting a measurement

Press button can end a measurement in advance.
LCD show on the period of the measurement is for experience time, the longest record 99hours 59 minutes 59sec.

LEQ TEST MODE

Leq test mode deform frequency weighting is A weighting; time weighting is FAST; Time of the integral 30 secs.
Press to change frequency weighting before starting a measurement.
Press button pause measurement after starting a measurement.
Press button can end a measurement in advance.
LCD show on the period of the measurement is an integral time,adopt countdown system .

LEQ Auto Record Setting: in LEQ measurement time setting toggle by ‘RECORD/MEMORY’ key

INTEGRAL TIME SET

Leq test mode press button into integral to set for time, can select that 9 kinds of integral time or hand operation establish definite integral for time .

Press button choose integral calculus enactment.
; button to select option to adjust.
; button to change digit.
Press button to store set and exit set mode.

SEL (LAE) TEST MODE

SEL (LAE) test mode deform frequency weighting is A weighting;time weighting is FAST.
Press to change frequency weighting before starting a measurement
Press button pause measurement after starting a measurement.
Press button can end a measurement in advance.
LCD to show on the period of the measurement is for experience time,the longest record 99hours 59 minutes 59sec

PEAK MAXIMUM TEST MODE

Peak test mode deform frequency weighting is C weighting; time weighting is Peak.
Press button pause measurement after starting a measurement.
Press button can end a measurement in advance.
LCD show on the period of the measurement is for experience time,the longest record 99hours 59 minutes 59sec.

RT60( REVERBERATION TIME) TEST MODE

RT60 test mode deform frequency weighting is A weighting; time weighting is Fast.
Press to change frequency weighting before starting a measurement.
Press button pause measurement after starting a measurement.
Press button can end a measurement in advance.
MAX value is the 1st getting value equal / or more than 90dB.
MIN value is MAX value minus 60 dB, the 60dB is a fixed/standard value after calculation.
The reverberation time is for calculating the require time from MAX. value (i.e. 91dB) reduce to MIN (i.e.31dB) .

RT 60 ESTIMATE MODE

RT 60 estimate formula is RT60=（0.161×V）/SA
Press button for setting / input the room’s m3 (cube meter), for example: 10
Press button for setting the value of sound surface absorb accumulates value (SA), for
Example : 1.0 .
Press button for RT60 estimation, for example : 1.6 seconds
Press button to exit RT 60 estimate mode.
; button are for the input value modification (more or less) for room m3 or

EXPLANATION

MEASUREMENT PARAMETERS:

Test Function	Screen parameter	Explanation
SPL	LAFp	Sound pressure level (SPL)
SPL	LASp	Sound pressure level (SPL)
SPL	LCFp	Sound pressure level (SPL)
SPL	LCSp	Sound pressure level (SPL)
SPL	LZFp	Sound pressure level (SPL)
SPL	LZSp	Sound pressure level (SPL)
Leq	LAFq	Equivalent continuous level for the duration of the measurement for A weighting
Leq	LCFq	Equivalent continuous level for the duration of the measurement for C weighting
Leq	LZFq	Equivalent continuous level for the duration of the measurement for Z weighting
SEL	LAE	Frequency weighted sound exposure level for the duration of the measuremen for A weighting
SEL	LCE	Frequency weighted sound exposure level for the duration of the measuremen for C weighting
SEL	LZE	Frequency weighted sound exposure level for the duration of the measuremen for A weighting
Peak	Lcpeak	Instantaneous C peak level

A, C, Z WEIGHTING INSTRUCTION:

A: The A weighting curve is based on 40 Phon Fletcher-Munson Equal Loudness
Contour, Noise assessment in human, suggest to use the A weighting.
C: The C weighting in essentially is approximate smooth. With labor safety concern, suggest using the C weighting.
Z: The Z weighting for the electric instrument interior not the linear signal which processes after the filter, suits in wants to output AC or the DC signal does other research to use.
The Z weighting is a linear signal which is not processed through the filter.
It’s suitable to output AC or DC signal for research.
Sound Level Meter Class Description:

Class 0: use in the laboratory reference standard.
Class 1: laboratory or field use.
Class 2: laboratory or field use.
Class 3: general field use.

Input interface
The front is PLT 4, the signal input receptacle. The pin definition and function are shown in Fig 2︰

ST-107

Pin 1 Power
Pin 2 GND
Pin 3 NC
Pin 4 NC

ST-107S

Pin 1 Power(+)
Pin 2 GND
Pin 3 Power(-)
Pin 4 GND

ANALOG AC/DC OUTPUT

AC output:2 Vrms/130dB
DC output: 2Vdc/130dB

The Microphone Lengthens The Test
In order to avoid the measurement deviation caused by the reflection effect and operation problem, use the cable to extend the microphone for measuring. (Refer to chapter 11.3.2).

Press button to turn the power off.
Turn the preamplifier and microphone counterclockwise to be separated from the main body. (Refer to Fig 5).
Connect the extension cable to the microphone and main body. (Refer to Fig 6).

SOFTWARE INSTALLATION

Link website https://www.tenmars.com/
or scan below QR code:
Search ST-107.
Click on the ST-107 photo.
Click File Download, then select Software Download.
Download and unzip the software.
For the latest software information and installation procedures, please refer to the software installation guide.

MAINTENANCE

GENERAL INFORMATION
This is a precision instrument. To guarantee its performances be sure to use it or keep it stored on suitable environmental conditions. Do not expose it to high temperatures or humidity or direct sunlight. Be sure to turn it off after use. If you expect not to use the instrument for a long period remove batteries to avoid leakages of battery liquid which could damage the its inner components.

BATTERY REPLACEMENT

The low battery “ ” indication is displayed, the batteries are to be replaced.

Turn off the instrument.
Remove the battery cover.
Remove all the batteries from the battery holder.
Insert four new batteries of the same type respecting the polarity signs. Install the battery cover.
Please depend on the local laws and regulations to process the waste battery.

CLEANING
To clean the instruments use a soft dry cloth. Never use a wet cloth, solvents or wate.

END OF LIFE
Caution: this symbol indicates that equipment and its accessories shall be subject to a separate collection and correct disposal.

TECHNICAL SPECIFICATIONS

FEATURE
Environmental conditions: temperature 23°C ± 5°C, relative humidity < 80%.

Display	Double rows LCD MAX reading 1999
Display Refresh Rate	1 Time/sec
Major Applicable Standards	IEC 61672-1：2002 Class2(ST-107/ST-107S) JJG-188-2002 Class 2(ST-107S)
Other Standards	IEC60651:1979 TYPE 2(ST-107/ST-107S) IEC60804:2000 TYPE 2(ST-107/ST-107S) ANSI S1.4:1983 Type12(ST-107/ST-107S)
Microphone(ST-107S)	1/2” pre-polarized condenser microphone build in preamplifier: 1V/Pa@250HZ, frequency range: 20 Hz~12.5 kHz, Thermal noise: <25 dB(A)
Microphone(ST-107)	1/2 inch Electret condenser microphone
Measurement Items	Lxyp, Lxmax, Lxmin, Lxeq, LAE, Lcpeak,RT60
Measurement Range	30dB to 130dB (A) 35dB to 130dB (C) 40dB to 130dB (Z)
Dynamic Range	100 dB
Integrate Time Setup	Randomly, 10s, 1m, 5m, 10m, 30m, 1h, 8h, 16h, 24h
Internal memory	24C512 × 4 ；MAX Datalogger data ＞37,000
Micro SD Card	The max support capacity of micro SD card is 32GB； 37,000 data about story space 300KB
Maximum Peak C Weighting Sound Level Measurement	70~133 dB
Time Weighting	Fast, Slow, Impulse, Peak
Frequency Weighting	A/C/Z
Frequency Range	31.5Hz~8KHz(ST-107)
Frequency Range	20Hz~8KHz(ST-107S)
DC Output	2Vdc/130dB
AC Output	2Vrms/130dB
Starting Time	＜10 Second
Battery Life	30 hours (LR6 : 4 Alkaline batteries)
AC Adapter	Input : 100V~240V ACV,Output:6V~9V DCV
Dimensions	285(L) x 90(W) x 39(H) mm
Weight	500g ( including Batteries)

ENVIRONMENT

Environmental Conditions

For inside use, max height: 2000m
Reference temperature: 23° ± 5°C
Operation temperature: 5 ~ 40°C
Operation humidity: <80% RH
Storage temperature -10 ~ 60°C
Storage humidity <70%

EMC
This instrument was designed in accordance with EMC Standards in force and its compatibility has been tested in accordance with EN61326-2 (2006).

ACCESSORIES

Standard Accessories

Meter x 1.
User’s manual.
Switching power supply: 100V ~ 240V AC to DC 6V~9V/500mA.
Carrying case.
4 batteries 1.5 V – LR6 – AA – AM3 – MN 1500.
60mm diameter windscreen.
USB Cable.

SERVICE

WARRANTY CONDITIONS
This instrument is guaranteed for one year against material or production defects, in accordance with our general sales conditions. During the warranty period the manufacturer reserves the right to decide either to repair or replace the product. Should you need for any reason to return back the instrument for repair or replacement take prior agreements with the local distributor from whom you bought it. Do not forget to enclose a report describing the reasons for returning (detected fault). Use only original packaging. Any damage occurred in transit due to non-original packaging will be charged anyhow to the customer.
The warranty doesn’t apply to:

Accessories and batteries (not covered by warranty)
Repairs made necessary by improper use (including adaptation to particular applications not foreseen in the instructions manual) or improper combination with incompatible accessories or equipment.
Repairs made necessary by improper shipping material causing damages in transit. Repairs made necessary by previous attempts for repair carried out by non-skilled or unauthorized personnel.
Instruments for whatever reason modified by the customer himself without explicit authorization of our Technical Dept.
The contents of this manual may not be reproduced in any form whatsoever without the manufacturer’s authorization.
Our products are patented. The logotypes are registered. We reserve the right to modify characteristics and prices as part of technological developments which might require them.

SERVICE
Shouldn’t the instrument work properly, before contacting your distributor make sure that batteries are correctly installed and working, check the test leads and replace them if necessary.

TENMARS ELECTRONICS CO., LTD
6F, 586, RUI GUANG ROAD, NEIHU, TAIPEI 114, TAIWAN.
E-mail: service@tenmars.com
http://www.tenmars.com

FAQ

How do I adjust the weighting options on the ST-107/ST-107S?

To change the weighting from A to C or Z, follow the instructions provided in section 10.2 of the user manual.

Documents / Resources

TENMARS ST-107 Integrating Sound Level Meter [pdf] User Manual
ST-107, ST-107S, ST-107 Integrating Sound Level Meter, Integrating Sound Level Meter, Sound Level Meter, Level Meter, Meter

References

User Manual

TENMARS ST-107 Integrating Sound Level Meter

Product Information

Product Usage Instructions