Sound Analyzer

Real Time 1/1 & 1/3 Octave band Analysis

TES-1358
INSTRUCTION MANUAL

FAST LA W 75.2 dB
dB
100
90
80
70
60
50
40
30
Hz 31.5 125 500 2k 8k L W
[1/3 OCT ] 01 / 07 / 27

14:26:39

TES ELECTRICAL ELECTRONIC CORP.

 CONTENTS
Title Page
I. SAFETY INFORMATION..................................................... 1

II. GENERAL & FEATURES.................................................... 2

III. SPECIFICATIONS ............................................................... 2

IV. CONTROLS AND FUNCTIONS .......................................... 5

4-1 Parts description ............................................................................ 5
4-2 Operation keys ............................................................................... 7
4-3 Measurement screen...................................................................10
V. CALIBRATION PROCEDURES ........................................ 11

VI. MEASUREMENT PREPARATION .................................... 12

VII. SETTING THE DATE AND TIME ...................................... 12

VIII. SOUND PRESSURE LEVEL MEASUREMENT................ 13

8-1 Technical notes ............................................................................13
8-2 Instantaneous sound pressure level measurement (LA, LC, LP).14
8-3 Leq and LE measurement .............................................................16
IX. MEMORY FUNCTION ....................................................... 18
9-1 Manual storing data in memory (1024 data sets) .......................18
9-2 Reading from memory .................................................................20
9-3 Auto storing data in memory........................................................21
9-4 Erase memory data .....................................................................23
X. RS-232 INTERFACE, SOFTWARE INSTALLATION and
OPERATION...................................................................... 23
I. SAFETY INFORMATION

 Read the following safety information carefully before

attempting to operate or service the meter.

 Use the meter only as specified in this manual; otherwise, the

protection provided by the meter may be impaired.

 Environment conditions
 Altitude up to 2000 meters

 Relative humidity 90% max.

 Operation Ambient 0 ～40℃

 Maintenance & Clearing

 Repairs or servicing not covered in this manual should
only be performed by qualified personnel.

 Periodically wipe the case with a dry cloth. Do not use

abrasives or solvents on this instrument.

 Safety symbols

Comply with EMC

1
II. GENERAL & FEATURES

The sound analyzer meter allows digital 1/1-octave and

1/3-octave analysis in real time.
 Five measured parameters SPL (Sound Pressure Level), Leq
(Equivalent Continuous Sound Pressure Level), LE (Sound
Exposure Level), Lmax (Maximum Sound Pressure Level),
Lmin (Minimum Sound Pressure Level)
 RS-232 interface with PC.
 Data Logger function.
 Real time clock with calendar.
 Both AC and DC signals output is available for level recorder,
graphic recorder.
 Auto-Ranging for SPL function.

III.SPECIFICATIONS

 Standard applied : IEC 60651 type2, 60804 type 2, ANSI S1.4

type2, IEC 1260 (1995).

 Display : Backlit LCD, 160×160 dots.

Sound level meter mode
Numeric display : 4 digits, update rate 0.5S,
resolution 0.1 dB.
Bar graph display :100dB range, update rate
0.125S, resolution 1dB.
Frequency analysis mode
Numeric display : 4 digits, update rate 0.5S,
resolution 0.1dB.
Bar graph display : 70dB range, update rate
0.125S, resolution 1 dB.

2
 Accuracy : ±1.5dB (ref 94dB @1kHz)

 Measurement Frequency range : 25Hz – 10KHz

 Dynamic range : 100dB (Sound level meter mode)

70dB (Frequency analysis mode)

 Measurement range : 30dB – 130dB

 Sound Pressure Level range:

Sound level meter mode (display range 100dB) :
30 – 130dB

Frequency analysis mode (display range 70dB) :

20–90dB, 30–100dB, 40–110dB, 50–120dB, 60–130dB

 Frequency weighting : A, C, P (Flat)

 Time weighting : Fast, Slow

 Microphone : 1/2 inch electret condenser microphone.

 Display warning indicator :

OVER indicator (Input signal over the upper limit)
UNDER indicator (Input signal under the lower limit)

 Warm-up time : Less than 20min

 Memory capacity : Manual store block and auto store block
(separate).
Store mode
Mode
Manual Auto

Sound level meter 1024 data sets 10000 data sets

1/1-octave analysis 1024 data sets 6140 data sets
1/3-octave analysis 1024 data sets 3070 data sets

3
 AC output : 2 Vrms at FS (full scale).
output impedance approx. 600Ω.

 DC output : 10mV/dB.
output impedance approx. 100Ω.

 Power : 4 pcs of C size 1.5V (LR14) alkaline batteries.

External DC power supply : 6 Vdc, 1A.

 Battery life : Approx. 2hours

 Operating Temperature/Humidity : 0℃ to +40℃,10 to 90%RH.

 Storage Temperature/Humidity : -10℃ to +60℃,10 to 75%RH.

(battery removal)

 Dimensions & Weight : 34.5(H) × 10(W) × 6(D) cm

Approx.950g (including batteries).

 Accessories : Instruction manual, Alkaline battery × 4, Hard

carry case, CD-ROM, RS-232 cable, ( 9 pin to
25 pin gender changer), Adjustment screw
driver, Windscreen, 3.5 plug, AC adaptor.

 Optional accessories : Microphone extension cable (5m or

10m), Sound level calibrator, Tripod.

4
IV. CONTROLS AND FUNCTIONS

4-1 Parts description

FAST
100
LA W 65.2 dB
dB
80
OFF ON
LIGHT

60

40

20
Hz 31.5 125 500 2k 8k L W
CONTRAST

[ 1 / 3 OCT ] 01 / 06 / 19 14:26:39
AC
OUTPUT
DC

SOUND ANALYZER
1/1 & 1/3 OCTAVE BAND
DC6V

IEC 651 IEC 804 TYPE 2

IEC 1260 CLASS2
ACCURACY : ¡ 1Ó.5dB
CAL

IEC LR14 1.5V X 4

ON
POWER
OFF

1. Windscreen
If you operate at wind speed over 10m/sec. Please put
windscreen in front of the microphone.
2. Microphone
The microphone assembly can be removed from the sound
level meter and connected via an optional extension cable, for
measurements a distance.

5
3. Display
The backlit liquid crystal display has a resolution of 160×160
dots.
4. Operation keys
5. Power switch
This sliding switch serves to turn the unit on and off.
6. Calibration adjust knob
Serves to carry out calibration, using the supplied adjustment
screwdriver.
7. DC 6V jack
The AC adaptor can be plug here for powering the unit from an
AC outlet for long term measurements.
8. DC output jack
A DC signal corresponding to the sound pressure level is
available at this output.
9. AC output jack
A AC signal corresponding to the sound pressure is available
at this output.
10. LCD contrast adjust knob
Serves to adjust the display contrast. Use the supplied
adjustment screwdriver for the adjustment.
11. LCD backlight switch
Serves to turn the display backlight on and off.
12. Hand strap
The strap should be used to safely carry the unit during field
work.
13. RS-232 interface connector
Serves for input and output of control signals and
measurement data. A computer can be connected here.
14. Battery compartment
The unit uses four batteries.
15. Tripod mounting screw
For long term measurements, the unit can be mounted on
the tripod.
6
4-2 Operation keys

a.) MODE key

Serves to call up the various processing results on
the display.
For display items are sound pressure level (L),
equivalent continuous sound pressure level (Leq),
Sound exposure level (LE), maximum sound pressure
level (Lmax), and minimum sound pressure level
(Lmin).

b.) FREQ WGHT key

Selects the frequency weighting characteristic.
Available settings are “A” weighting (A), “C” weighting
(C), and flat frequency response (P).

c.) TIME CONST key

Selects the time weighting. Available settings are
“FAST” and “SLOW”.
7
d.) LEVEL
Serves to select the sound pressure level ranges on 1/1 and 1/3
octave band frequency analysis mode. (20~90dB, 30~100dB,
40~110dB, 50~120dB and 60~130dB, total 5 ranges)

e.) SLM/ 1/1/ 1/3 key

This key switches the operation mode between sound
level meter (SLM), 1/1-octave frequency analysis (1/1),
and 1/3-octave frequency analysis (1/3).

f.) MEAS TIME key

 Sets the Leq, LE, Lmax and Lmin measurement time :
24h1s3s10s30s1m5m8m10m15m
30m1h8h
 2nd + MEAS TIME : Enter to setting the date
and time mode.

g.) MEMORY key

 Enter to memory mode.
 2nd + MEMORY : Enter to data record
interval time setting : 0 (no record) 1s 3s10s
30s1m5m8m10m15m 30m1h62.5ms

h.) ENTER key

Store the new date and time, the time clock is start.
i.) Cursor key
 Serve to move the octave frequency band marker during
frequency analysis.
 2nd+ Cursor : In recall mode to select the
memory address in which to store the measurement
data.

j.) START/STOP key

Press to start and to terminate the Leq, LE, Lmax and Lmin

8
 sound pressure level measurement.
k.) PAUSE/CONT key
Server to the measurement temporarily pause ( display)
or resume (display ).

l.) 2nd key

Press to shift key to second function.

m.) STORE key

In manual memory mode, store the measured data into the
memory.

n.) RECALL key

In manual memory mode, recall the stored memory data.

o.) STORE + RECALL key (Erase memory data)

Turn off the meter, press and hold down STORE and
RECALL two keys, then turn on the meter, until the LCD
display “ALL memory are erased”.

9
4-3 Measurement screen
1. Sound pressure level measurement screen

FAST
LA dB
30 80 130

[ SLM ] 01 / 07 / 27 14:26:39

2. 1/1-octave analysis screen

The staircase shape on the display represents the 1/1-octave
analysis result. From left, the bars correspond to 31.5, 63,
125, 250, 500, 1k, 2k, 4k, 8kHz. To read the levels at these
frequencies, use the Cursor key to move the cursor to
the desired point. The frequency and level are then shown
on the upper of the screen.

FAST
dB
LA 2k Hz 68.4 dB
100
90
80
70
60
50
40
30
Hz 31.5 125 500 2k 8k L W
[ 1 / 1 OCT ] 01 / 07 / 27 14:26:39

10
3. 1/3-octave analysis screen
The staircase shape on the display represents the 1/3-octave
analysis result. From left, the bars correspond to 25, 31.5, 40,
50, 63, 80, 100, 125, 160, 200, 250, 315, 400, 500, 630, 800,
1k, 1.25k, 1.6k, 2k, 2.5k, 3.15k, 4k, 5k, 6.3k, 8k, 10kHz. To
read the levels at these frequencies, use the Cursor
key to move the cursor to the desired point. The frequency
and level are then shown on the upper of the screen.

FAST
dB
LA W 75.2 dB
100
90
80
70
60
50
40
30
Hz 31.5 125 500 2k 8k L W
[ 1 / 3 OCT ] 01 / 07/ 27 14:26:39

V. CALIBRATION PROCEDURES
Using a standard acoustic calibrator such as the TES-1356.
1. Make the following switch settings.
Display : SLM (LA)
Time weighting : FAST
2. Insert the microphone housing carefully into
the insertion hole of the calibrator.
3. Turn on the switch of calibrator and adjust
the CAL potentiometer of the unit so that the
display indicates the desired level.
Our products are all well calibrated before
FAST
LA dB
30 80 130

[ SLM ] 01 / 06 / 19 14:26:39

shipment.
Recommended recalibration cycle : 1 year.
Caution : Ambient sources of noise or vibration
can cause a false calibration.
11
VI. MEASUREMENT PREPARATION
1. Battery loading
Remove the battery cover on the back and put in four 1.5V C
size battery.
Note : Take care to observe battery polarity.
2. Battery replacement
When the battery voltage drops below the operation voltage.
LBATT appears and flashes in the display. If it appears the
batteries should be replaced with new batteries.
3. AC adaptor connection
When the AC adaptor is used, insert the plugs of the adaptor
into the DC 6V jack on the side panel.

VII.SETTING THE DATE AND TIME

Date and time information is stored with each record you save.
Therefore, it is important to make sure this information is correct.
Set the date and time as described below :
1. Press 2nd key one time then press MEAS TIME key,
enter to setting the date and time mode.
The display screen in second location will be flicker.
2. Press LEVEL key to set the numbers increase or
decrease.
3. Press Cursor key, move flicker number location to
year/month/day/hour/minute/second setting location.
4. Press LEVEL key to set the number.
5. When the setting is correct, press ENTER key to exit this
mode and the time clock is start.
Note : When no change the date and time or no press ENTER
key about one minute, will leave setting the date and time
mode, the original setting date and time is no changed.

12
VIII. SOUND PRESSURE LEVEL MEASUREMENT

8-1 Technical notes

1. The decibel (dB)
The range over which the human ear responds to sound
pressure (noise) is extremely large ; 20Pa (the threshold of
hearing) to 100 Pa (the threshold of pain). The measurement
of sound pressure is made manageable by use of the decibel,
which is logarithmic. This is good for ease of reference,
however it means that decibels are not linear and so can not
be added together. A simple rule is that doubling the noise
causes the level to rise by 3dB.

2. SLM-sound level meter

Instantaneous sound pressure level (SPL) is used for spot
checks to establish instantaneous noise levels that might be
of concern and is defined by the logarithmic equation :
P
SPL (in dB) : 20 log10
P0
Where P = rms measured sound pressure level
P0 = rms reference sound pressure level (deemed to
be 20 Pa)
3. Leq-level equivalent (continuous)
Leq is used to assess the rms average noise level over a
preset period of time, often the starting point of a noise
assessment.
To make an Leq measurement the period of time over which
it is to be made be selected. The longer the period of
measurement, the more accurate the Leq reading, a typical
period used is 8 hours (the length of a working day).
4. LE – Sound exposure level
LE measurements are almost identical to Leq measurements
but normalised or compressed in to 1 second. This allows
the total sound energy of an event, such as train passing a
13
 platform, to be evaluated. Another event, such as the next
train, which lasts for a different amount of time can be
measured in the same way. The two readings can be
compared to assess how much total noise the passengers
standing at the platform were exposed to by each train. To
make an LE measurement either a preset time period must be
selected on the instrument, or the PAUST/CONT key
must be used to stop and start measurement of a specific
event.

8-2 Instantaneous sound pressure level measurement (LA, LC, LP)

To perform a measurement, carry out the following steps.
1. Set the power switch to ON and wait until the measurement
screen appears.
ID No: 00001358 Ver: 0.10

FAST
SOUND LEVEL METER
1/1 & 1/3 Octave Band LA dB
Real-Time Analyzer 30 80 130

Self-Testing... [ SLM ] 01 / 07 / 27 14:26:39

2. Press the SLM/ 1/1/ 1/3 key to select desired SLM, 1/1 or
1/3 octave band sound pressure level measurement screen.

14
 FAST
dB
LA W 75.2 dB FAST
LA W 75.2 dB
dB
100 100
90 90
80 80
70 70
60 60
50 50
40 40
30 30
Hz 31.5 125 500 2k 8k L W
Hz 3 1 . 5 125 500 2k 8k L W
[ 1 / 1 OCT ] 01 / 07 / 27 14:26:39 [ 1 / 3 OCT ] 01 / 07/ 27 14:26:39

3. Use the FREQ WGHT key to select the desired LA , LC or

LP frequency weighting setting.

4. Use the TIME CONST key to select the desired FAST or

SLOW time constant setting. Normally, the “FAST” setting
should be used.

5. Use the LEVEL key to select the level range .

Choose a setting in which the “OVER” and “UNDER”
indications do not appear. In SLM mode, the dynamic range
is 30~130dB, so the LEVEL key is not activate.

FAST
dB
LA W 75.2 dB
100
90
80
70
60
50
40
30
Hz 31.5 125 500 2k 8k L W
[ 1 / 1 OCT ] 01 / 07 / 27 14:26:39

15
8-3 Leq and LE measurement
To perform a measurement, carry out the following steps.
1. Set the power switch to ON and wait until the measurement
screen appears.
2. Press the MEAS TIME key, setting the preset measurement
time for a fixed time period (know as the integral time), after
which measurement automatically stops.

There are 13 preset time settings available :

 1s  10min
 3s  15min
 10s  30min
 30s  1h
 1min  8h
 5min  24h
 8min
Note : The setting will wrap around from 24h to 1s.

FAST
dB
LA W 75.2 dB
100
90
80
70
60
50
40
30
Hz 31.5 125 500 2k 8k L W
[ 1 / 1 OCT ] 01 / 07 / 27 14:26:39

16
3. Use the SLM/ 1/1/ 1/3 key to select desired SLM, 1/1 or
1/3 octave band sound pressure level measurement screen.
4. Use the FREQ WGHT key to select the desired LA, LC or LP
frequency weighting setting.
5. Use the TIME CONST key to select the desired FAST or
SLOW time constant setting. Normally, the “FAST” setting
should be used.
6. Use the LEVEL key to select the level range.
Choose a setting in which the “OVER” and “UNDER”
indications do not appear. In SLM mode, the dynamic range is
30~130dB, so the LEVEL key is not activate.
7. Press the START/STOP key. The “” mark on the
display and the equivalent continuous sound pressure level
measurement begins.
8. At the any measurement conditions “measuring”, “ pause”
or “■ terminate”. Can be use MODE key to select view
the any other parameter L, Leq, LE, Lmax or Lmin measure
value.
9. When the measurement time set in step 2 has elapsed, the
measurement terminate automatically.
10. When wish to terminate the measurement earlier, press the
PAUSE/CONT key to paused measuring, the “ ” mark will
appear on the display. Press PAUSE/CONT key again will
resume measuring.
11. Press the START/STOP key to stop measuring, the “■”
mark will appear on the display.
12. Press the MODE key to display the LAeq , LAE or other
parameter value.
Note : In this measurement, can not change frequency
weighting, time weighting and SLM/ 1/1/ 1/3 mode.

17
IX. MEMORY FUNCTION
The sound analyzer incorporates a memory that allows manual and
automatic storing of measurement data. Stored measurement
results can be displayed by pressing the RECALL key.
MANU (manual store)
Measured instantaneous value data and processing results can
be stored manually by the operator.
AUTO (automatic store)
Automatically store measuring data at the measurement time
interval.
9-1 Manual storing data in memory (1024 data sets)
1. Set the power switch to ON.
2. Use the SLM/ 1/1/ 1/3 key to desired SLM, 1/1 or 1/3
octave band sound pressure level measurement screen.
3. Press MEMORY key, enter to memory mode, display M
[0001] first data record memory address number.

FAST
dB
LA W 75.2 dB
100
90
80
70
60
50
40
30
Hz 31.5 125 500 2k 8k L W
[ 1 / 1 OCT ] 01 / 07 / 27 14:26:39

4. Press STORE key, one set of data is stored in the [0001]

memory address. The address counter is in cremented by
one . By repeating this procedure, more data can be stored
in memory.
18
5. Press MEMORY key again, exit the memory mode.

19
9-2 Reading from memory
1. Press MEMORY key, enter memory mode, display M
[].

2. Press RECALL key, display R [] record number

and data value. If no data record in memory, Press RECALL
key is no active.

FAST
dB
LA W 75.2 dB
100
90
80
70
60
50
40
30
Hz 31.5 125 500 2k 8k L W
[ 1 / 1 OCT ] 01 / 07 / 27 14:26:39

3. Press 2nd key, the 2ND annunciator at the upper left of

the screen will display.

4. Press Cursor key to select the memory address from

which you want to display data.

5. If in the 1/1 or 1/3 octave band screen, Press 2nd key to

remove 2nd annunciator, then press Cursor key,
the frequency and level display at the upper of the screen
change to desired point value.

6. Press 2nd key to remove 2nd annunciator.

7. Press RECALL key, will exit reading mode.

8. Press MEMORY key, exit memory mode.

20
9-3 Auto storing data in memory
Before auto store data, first need setting record interval period.
When in auto store data function, can not view other
parameter measurement.
1. Setting record interval period : Record interval period value
default value is “0”, can not auto store. Press 2nd key,
then press MEMORY key to select the desired setting time,
the period time is : 0sec (No record) 1sec3sec
10sec30sec1min 5min 8min 10min 15min
30min 1hr8h62.5ms. Example : Record period time
setting to 1 second, display P [00:00:01].

FAST
dB
LA W 75.2 dB
100
90
80
70
60
50
40
30
Hz 31.5 125 500 2k 8k L W
[ 1 / 1 OCT ] 01 / 07 / 27 14:26:39

2. Press 2nd key, the 2ND annunciator will disappear

from the screen.
3. Use the SLM/ 1/1/ 1/3 key to desired SLM, 1/1 or 1/3
octave band sound pressure level measurement screen.
4. Setting the preset measurement time (refer to 8-3-2).
5. Press MEMORY key, enter to memory mode, the upper of
the screen shown “ M [] ”.

21
6. Press START/STOP key, then auto storing display data to
memory. The upper of the screen shown “ S Auto ” and
 annunciator.

FAST
dB
LA W 75.2 dB
100
90
80
70
60
50
40
30
Hz 31.5 125 500 2k 8k L W
[ 1 / 1 OCT ] 01 / 07 / 27 14:26:39

CAUTION : When in auto store mode, can not change any

parameter setting. (Such as frequency weighting, time
constant, LEVEL )
7. When the measurement time set in the preset measurement
time has elapsed ; or the memory record is full ; or press
PAUSE/CONT key ; or press START/STOP key, will
terminated auto storing.
8. Getting the auto storing data, only use PC download method.

22
9-4 Erase memory data
1. When the instrument memory is full, the FULL annunciator
appears in the upper right hand corner of the screen.
ID No: 00001358 Ver: 0.10

FAST ALL Memory are Erased !!

SOUND LEVEL METER
LA dB 1/1 & 1/3 Octave Band
30 80 130 Real-Time Analyzer

[ SLM ] 01 / 07 / 27 14:26:39 Self-Testing......OK!!

2. Turn off the meter, press hold down STORE and

RECALL two key, then turn on the meter, until display “ALL
Memory are Erased !!” , will erase all memory data.

X. RS-232 INTERFACE, SOFTWARE INSTALLATION

and OPERATION
 For the detailed instruction, please refer to the content of
attached CD-ROM, which has the complete instruction of
RS-232 interface, software operation and relevant
information.
 RS-232 protocol : are enclosed within the content of CD-ROM,
please open the CD-ROM for details.

23
TES ELECTRICAL ELECTRONIC CORP.
7F, No. 31, Lane 513, Rui Guang Road, Neihu Dist. Taipei, Taiwan, R. O.
C.
Tel : (02) 2799-3660 Fax : 886-2-2799-5099
E-Mail : tes@ms9.hinet.net http://www.tes.com.tw

Jan-2007-4