Scarlet Tech ST-109 User manual

ST-109/ST-107/ST-107S
User’s Manual
Integrating Sound Level Meter
SCARLET TECH

Contents:
1. SAFETY PRECAUTIONS .................................................................................. 3
1.1. Preliminary Description................................................................................ 3
1.2. Note ............................................................................................................. 3
2. PREPARATION FOR USE ................................................................................ 4
2.1. Initial ............................................................................................................ 4
2.2. Supply Voltage ............................................................................................ 4
2.3. Calibration ................................................................................................... 4
2.4. Storage........................................................................................................ 4
3. INSTRUMENT INSTRUCTIONS........................................................................ 5
3.1. Instrument Description................................................................................. 5
3.1.1. Controls Description................................................................................ 5
3.1.2. Display Description ................................................................................. 6
3.1.3. ST-109 Microphone................................................................................. 7
3.1.4. ST-107S Microphone .............................................................................. 8
3.2. Measurement Procedures ........................................................................... 8
3.3. Data Hold..................................................................................................... 9
3.4. Maximum/Minimum ..................................................................................... 9
3.5. Single Data Recode..................................................................................... 9
3.6. Viewing Logged Reading............................................................................. 9
3.7. Set Mode ................................................................................................... 10
3.7.1. Clock set ............................................................................................... 10
3.7.2. Auto Recode Time Set .......................................................................... 10
3.7.3. Auto Power Off Time Set ...................................................................... 10
3.7.4. Clear Data Logger Memory................................................................... 11
3.7.5. Clear All Data Logger Memory.............................................................. 11
3.7.6. Copy All Data Logger To micro SD Card .............................................. 11
3.7.7. Auto Backup.......................................................................................... 12
3.7.8. 94dB Calibration.................................................................................... 12
4. SPL (LXYP) TEST MODE................................................................................ 13
5. LEQ TEST MODE ............................................................................................ 14
5.1. integral Time set ........................................................................................ 15
6. SEL (LAE) TEST MODE .................................................................................. 16
7. PEAK MAXIMUM TEST MODE ....................................................................... 17
8. RT60( REVERBERATION TIME) TEST MODE............................................... 18
8.1. Rt 60 estimate mode ................................................................................. 19
9. EXPLANATION ................................................................................................ 20
9.1. 1. Measurement Parameters: .................................................................... 20
9.2. A, C, Z Weighting Instruction:.................................................................... 21

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9.2.1. Input interface ....................................................................................... 22
9.2.2. ANALOG AC/DC OUTPUT ................................................................... 22
9.3. The Microphone Lengthens The Test........................................................ 23
10. MAINTENANCE ............................................................................................... 24
10.1. General Information................................................................................... 24
10.2. Battery Replacement................................................................................. 24
10.3. Cleaning .................................................................................................... 24
10.4. End of Life ................................................................................................. 24
11. TECHNICAL SPECIFICATIONS...................................................................... 25
11.1. Feature ...................................................................................................... 25
11.1.1.Standard:............................................................................................... 27
11.1.2.General Data......................................................................................... 27
11.2. Environment .............................................................................................. 27
11.2.1.Environmental Conditions ..................................................................... 27
11.2.2.EMC ...................................................................................................... 28
11.3. Accessories ............................................................................................... 28
11.3.1.Standard Accessories ........................................................................... 28
12. SERVICE ......................................................................................................... 29
12.1. Warranty Conditions .................................................................................. 29
12.2. Service....................................................................................................... 29

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1. 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:
Caution: refer to the user’s manual. An incorrect use may damage the
tester or its components
The instrument conforms to the CE standard
1.1. Preliminary Description
ST-109 is a high performance conforms to international IEC61672 Class 1
ST-107(S )is a high performance conforms to international IEC61672 Class 2
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.
1.2. 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 11.2.1.
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 Fig.1)

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2. PREPARATION FOR USE
2.1. 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 11.3.1chapter .In
case of discrepancies, contact the dealer immediately.
In the event of re-shipment of the instrument please follow the instructions reported
in chapter.
2.2. 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
2.3. 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.
2.4. 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.

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3. INSTRUMENT INSTRUCTIONS
3.1. Instrument Description
3.1.1. Controls Description
1. Microphone
2.
: Power Button
3. : Backlight Button
4. : Frequency Weighting
Select Butto
5. :Start or Pause Test Button
6. : Time Weighting Select
Button
7. :Test function select button
8. :Set Button
9. :Record dada / Reading
Record dada button
10. :Data Hold/ Setup function up
Button.
11. :Clock display select / Setup
function right Button.
12. : Enter key
13. :Stop Test/ Setup function
down key.
14. : Clock display select / Setup
function left key.
15. Micro SD Card
16. AC/DC Output
17. USB interface
18. DC voltage Input (6V~9V)

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3.1.2. Display Description
Bargraph
Auto Power Off
Reverberation Time
Data Hold
Peak
Sound exposure level
Sound pressure level
Equivalent continuous level
Sound level read out
Maximum
Minimum
Z Weighting
C Weighting
A Weighting
Reverberation Time unit
USB deliver
SD Install
Low Batty
Recode
Memory Full
Memory Viewing
Impulse Response
Fast Response
Slow Response
Clock Read out t
Start Measures
Pause Measures
Stop Measures
Setup Mode
Measure Time

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3.1.3. ST-109 Microphone
Diameter : 1/2 inch
Polarization voltage : 0V
Dynamic range : 25dBA ~140dB
Sensitivity : -26±2dB
Free field frequency response :
Frequency (KHz)
Deviation pressure
0.25
0
0.30
0
0.40
0
0.50
0.1
0.63
0.1
0.80
0.1
1.0
0.2
1.25
0.3
1.60
0.4
2.0
0.5
2.5
0.6
3.15
0.7
4.0
0.8
5.0
1.3
6.3
1.9
8.0
2.8
10
4.1
12.5
6.0
16.0
7.3
20.0
9.1

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3.1.4. 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
3.2. 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

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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.
Fig. 1
3.3. Data Hold
Press button to lock display data, press this button again to unlock
3.4. 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
3.5. Single Data Recode
Press button each time to store the display reading and memory location in
memory
3.6. 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)

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Press button again to exit viewing logged reading mode
3.7. Set Mode
Press button into set mode , can set 7 functions in set mode
3.7.1. 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
3.7.2. Auto Recode 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 recode time: 1 second; Maximum auto recode time: 23 hours 59
minutes 59 seconds
Set auto recode time equal 0 second0 disable auto recode function
3.7.3. Auto Power Off Time Set

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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
3.7.4. 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
3.7.5. 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
3.7.6. Copy All Data Logger To micro SD Card
Before carrying on data to copy please insert micro SD card first

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Copy to micro SD card file to be named this machine ID; The max support
capacity of micro SD card is 4GB
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
3.7.7. 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
3.7.8. 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.

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4. 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.
Have not started measurement
Start measurement
Pause measurement

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5. 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 .
Have not started measurement
Start measurement
End measurement
LEQ Auto Record Setting: in LEQ measurement time setting toggle by
'RECORD/MEMORY' key

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5.1. 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 .
•SET 0 prepare to establish integral time 10 sec
•SET 1 prepare to establish integral time 1 minutes
•SET 2 prepare to establish integral time 5 minutes
•SET 3 prepare to establish integral time 10 minutes
•SET 4 prepare to establish integral time 30 minutes
•SET 5 prepare to establish integral time 1 hour
•SET 6 prepare to establish integral time 8 hour
•SET 7 prepare to establish integral time 16 hour
•SET 8 prepare to establish integral time 24 hour
•SET 9 moveses to establish definite integral for time, the
shortest integral calculus time 1 sec, the longest integral calculus time 30 days
23 hours 59 minutes 59 sec
•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.

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6. 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
Have not started measurement
Start measurement
End measurement

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7. 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.
Have not started measurement
Start measurement
End measurement

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8. 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) .
Have not started measurement
Start measurement
End measurement