Tenmars ST-109R User Manual

ST-109R

Integrating Sound Level Meter

User’s Manual

HB2ST109R001

Contents

1 Introduction ....................................................... 1

2 Accessories ....................................................... 1

3 Safety Precaution .............................................. 1

4 Instrument Description ...................................... 2

5 Operation .......................................................... 3

5.1 Backlight Button ......................................... 4

5.2 Start/Pause Measuring ............................... 4

5.3 Data Hold: .................................................. 4

5.4 Single Record/ Datalogger Reading ........... 4

5.5 Product Setup ............................................ 5

5.6 Integrating Time Setup ............................... 5

5.7 Auto Power Off ........................................... 5

5.8 Analog/Communication Output Interface .... 6

5.9 Record Data Delete/Back-up ...................... 6

5.10 94dB Calibrate ........................................... 7

5.11 Microphone Connection Inter-face .............. 7

5.12 Microphone Extension Test ........................ 8

5.13 Sensitivity Correction .................................. 9

6 Software Installation ................................ ........ 10

7 General Specifications .................................... 11

8 Electrical specification ..................................... 12

9 Maintenance or Repair .................................... 14

10 Battery Replacement ....................................... 14

11 Product Disposal ............................................. 14

ST-109R

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1

1 Introduction

This Integrating Sound Level Meter (ISLM) is

IEC61672-2002 Class 1 compliant.

2 Accessories

1

Meter

1

User’s Manual

1

AC to DC adaptor

1

Windscreen ball

1

Installation disk

1

USB cable (Mini B type)

1

AC adapter (9~12V/500mA)

4

1.5V AA-LR6-AM3 alkaline battery

3 Safety Precaution

Caution! Please refer to this manual.
Improper use may damage the meter ad
its components.

Complies with European Directive.

 Do not operate in environments with flammable

gas or humid environments.

 Operating altitude: up to 2000M.
 Operating environment: Indoor use; Pollution

degree 2.

 Clean with soft cloth when dirty, such as glasses

cloth. Do not clean with chemicals and other
solvents.

 EMC: EN61326-1:CISPR 11:Group 1, Class B

 Class B – Equipment for use in all establishments

other than domestic.

 Group1 – RF energy generated is needed for

internal functioning.

ST-109R

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2

4 Instrument Description

1. Microphone

2. Power Button

3. Backlight Button

4. Start or Pause Test
Button

5. Frequency Weighting

Select Button

6. Time Weighting Select

Button

7. Set Button

8. Test function select

button

9. Record dada / Reading

Record dada button

10. Data Hold/ up arrow

button.

11. Clock switch/left
arrow button

12. OK button

13. Clock switch/right
arrow button

14. Shift switch/end

measurement/down
arrow button

15. MICRO SD card slot

16. Analog/RS232
professional output

17. USB

18. DC voltage input

(6V~12V)

ST-109R

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3

5 Operation

1. Press button to power on or off your
product.

2. Press button to selection measurement
mode.

 Sound pressure level (SPL)
 Equivalent Energy Sound Level (Leq)
 Sound exposure level (SEL)
 Peak sound pressure (PeakMAX)

3. Press button to switch time weight.

4. Press button to switch frequency weight.

5. Press button to switch shift, end integrating

measurement during integrating.

6. Press button to start integrating measuring
(SPL exclusive) and revoke auto off function.

7. Display measurement readings on LCD.

＊ Peak sound pressure (PeakMAX) does not
support time and frequency weighting.

CAUTION

Please mount windscreen to
microphone as shown in figure below to
reduce wind noise when ambient wind
speed is greater than 10m/sec.

ST-109R

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4

5.1 Backlight Button

In standby mode，Press button to turn on
backlight, press button again to turn it off

immediately.
＊Backlight will turn off in 15 seconds automatically.

5.2 Start/Pause Measuring

Press button to start integrating
Leq/SEL/PeakMAX and MAX/MIN lock-up function
with the maximum and minimum values displayed
at the lower row of LCD and measurement interval

upper row of LCD. Press button to pause
measurement and button to abort
measurement.

＊The longest time that the SPL mode, SEL, and

peak sound pressure mode can last is 99 hours,
59 minutes and 59 seconds.

5.3 Data Hold:

Press button to the on/off data HOLD. If the
integrating is started, this function is invalid.

5.4 Single Record/ Datalogger Reading

Each press the button once to display REC
message, increment record count by 1 and log one
measurement record.

Press and hold button for 1 second to enter
record reading mode, press / button to reading

records, press / button to toggle switch time
display between hh:mm:ss and yyyy/mm/dd, press

and hold button for 1 second to exit reading
function.

ST-109R

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5

5.5 Product Setup

Press button to enter set-up mode of this product for
the following:
Press the button to cycle through the following options:

Clock → Auto record → Auto power off → Communication
interface → Delete one record → Delete all record → Copy
SD card → 94dB calibrate → Back to measurement mode

Select settings

/ Select place settings

/ Select value up/down

Enter data delete/copy
Enter setup and exit setup page

＊Please get your SD card installed before enabling SD
card copy function. Please refer to section 5.9 for details.

5.6 Integrating Time Setup

In Leg mode the record and integrating time settings are
the same:

Press button to enter Integrating time selection page,
the LCD display REC with the following options for
selection:

10 seconds → 1 minute → 5 minute → 10 minute → 30
minute → 1 hour → 8 hour → 16 hour → 1 day → Custom.

Press / button to point cursors, / button to
change values, with the maximum settings at 23 hours, 59
minutes and 59 seconds.

Enter setup and exit setup page.

5.7 Auto Power Off

The longest auto power off time is 99 minutes; set this to
zero to disable the auto off function.
The auto power off will be disabled accordingly in the USB
connection mode.

ST-109R

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6

5.8 Analog/Communication Output

Interface

This product features to computer communication
inter-face: USB and RS-232.
The RS-232 (TTL) and analog output inter-face shares.
You may select USB or RS232 inter-face in the set-up
mode. The default value is USB.
AC signal output: MAX: 5VP-P/130dB, output impedance
around 600Ω
DC signal output: 10mV/10dB, output impedance around

100Ω

5.9 Record Data Delete/Back-up

You may define the file name with a desktop program: file
extension is "*.IAR", file name may contain up to 8
characters including capital letter A~F and number 0~9.
The auto backup function copies data from this product to
micro SD card and delete them afterwards.
Please connect to external power source for micro SD card
write-in operation to prevent it from failed due to power
outage.
You may manually delete records in the mode of a single
record or all records.
The single record delete function erases the latest one first
and move to the earlies one.
See section 5.5 for the functions of individual buttons.

＊ID of this product is "FFFFFFFF" by default.
＊This product supports a micro SD card in the

FAT16/FAT32 format.
＊The maximum space supported in SD/SDHC mode is

32GB.

ST-109R

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7

5.10 94dB Calibrate

Input 94dB@1KHZ signal.
Last calibration records are displayed at the lower
right corner of LCD.
Current measurement value is displayed at the
lower left corner of LCD.
Time weight value is Fast by default.
Calibration range: 91dB~97dB.

Press button to the selection frequency
weight.
Press button to select shift.

Press button to select full calibration.
Press button to select next setup mode.

Press button to save calibration value and exit
set-up mode.

5.11 Microphone Connection Inter-face

Pin 1: signal input
Pin 2: ground
Pin 3: power supply
Pin 4: X

ST-109R

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8

5.12 Microphone Extension Test

To avoid measurement deviation due to the
reflection effect and invalid operations you may
measure integrating sound levels by extending the
microphone with an extension cord.

 Press button to power off this product.
 Turn the pre-amplifier and microphone

counterclockwise to remove them from the body
as shown in figure below:

 Connect extension cord to the pre-amplifier and

microphone as shown in the figure below:

ST-109R

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9

5.13 Sensitivity Correction

Frequency

Deviation pressure

20-400

0

500

0

630

0

800

0

1000

0.2

1250

0.3

1600

0.4

2000

0.5

2500

0.6

3150

0.7

4000

0.9

5000

1.5

6300

2.3

8000

3.5

10000

5

12500

6.5

16000

8.7

20000

10.3

* Microphone specification: ST-109

ST-109R

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10

6 Software Installation

Operating system support: Windows XP/Windows7
/Windows 8.1/Windows 10

 Insert the DVD ROM included with this product in the

DVD drive of the computer connected to this product,
click to execute the Installer program.

 Remove the DVD once the desktop program is installed

successfully.

 Connect this product to a computer with included USB

cable.

 To execute desktop program: double click the Integrating

Sound Level Meter program icon to start it.

 See Software Installation Guide for details on software

operation.

ST-109R

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11

7 General Specifications

 Readings display: two rows with maximum

value at 1999.

 Lower power detection, backlight function, data

lock function (HOLD)

 Auto power On/Off function
 Overload display: "OVER" or "UNDER"
 Storage interval: 1 second~ 24 hours; up to

35,000 records.

 Battery: 1.5V*4(LR6 – AA – AM3 – MN 1500)
 Battery life: Approximately 30 hours
 Power consumption at standby mode: 10uW
 Power consumption at operation mode:

250mW

 Operation temperature and humidity: 5℃~40℃

with relative humidity up to 80%

 Storage temperature and humidity: -10℃~60℃

with relative humidity up to 70%

 Weight: Approximately 500 grams
 Dimensions: 285(L)x90(W)x39(H) mm
 Adapter specification:

Convert external AC 100~240V power to DC
9V/0.5A
Specification: Voltage at DC9V/0.5A
Plug: O.D.: 5.5mm; I.D.: 2.1mm

ST-109R

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12

8 Electrical specification

Display
Refresh Rate

One time per second

Major
Applicable
Standards

IEC 61672：2002 Class1

IEC60651:1979 TYPE 1
IEC60804:2000 TYPE 1

Microphone

High sensitivity, 1/2” pre-polarized

capacitor microphone 50 mV/Pa

Measurement
Items

Lxyp,Lxmax,Lxmin,Lxeq,LAE,Lcpeak

Measurement
Range

30dB ~ 130dB (A)

35dB ~ 130dB (C)

40dB ~ 130dB (Z)

Dynamic
range

60 dB

Measurement
shift

30dB ~ 90dB (L)
50dB ~ 110dB (M)
70dB ~ 130dB (H)

Integrate
Time Setup

Manual, 10s, 1m, 5m, 10m , 30m, 1h,
8h, 16h, 24h

ST-109R

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13

Micro SD
Card

The max support capacity of micro SD
card is 32GB； 37,000 data about story
space 300KB

Peak value
measurement
range

70~133 dBC

Time
Weighting

Fast, Slow, Impulse, Peak

Frequency
Weighting

A/C/Z

Frequency
Range

20Hz~16KHz

DC Output

10mV/1dB

AC Output

1Vrms(±10%)/130dB each range

Starting Time

＜10 Second

Thermal
noise

≦28dBA

ST-109R

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14

9 Maintenance or Repair

1. When the When symbol is displayed on
the LCD, it means that there is insufficient power;
please change the battery immediately in order to
ensure its accuracy.

2. Do not place the meter in locations that have high

temperature, humidity or that are exposed to
direct sunlight.

3. Remember to turn off the power after usage;
remove the battery if not used for a long period of
time in order to prevent battery leakage and
causing damages to internal components.

10 Battery Replacement

1. Turn off the power.

2. Open the battery cover at the back of the meter,

remove the batteries.

3. Insert four batteries in the correct

positive-negative polarity.

4. Put the battery cover back in place.

11 Product Disposal

Note: This symbol indicates that the
meter and its accessories must be
separated and processed properly.

TENMARS ELECTRONICS CO., LTD.

6F, NO.586 Ruiguang Rd, Neihu Dist.

Taipei City, Taiwan

E-mail: [e-mail]

http://www.tenmars.com