TES 1352H User manual

Sound Level Meter

Datalogger and RS-232 Software

TES-1352H

INSTRUCTION MANUAL

TES ELECTRICAL ELECTRONIC CORP.

CONTENTS

Title Page

1. INSTRUMENT CARE.....................................................................................1

2. FEATURES.....................................................................................................2

3. MEASUREMENT PARAMETERS..................................................................2

4. SPECIFICATIONS..........................................................................................3

5. CONTROLS AND FUNCTIONS.....................................................................6

6. DISPLAY DESCRIPTION...............................................................................8

7. PREPARATION FOR USE.............................................................................9

8. CALIBRATION PROCEDURE ..................................................................... 11

9. MEASUREMENT PROCEDURE..................................................................12

10. STORE/ERASE RECORDED DATA..........................................................12

11. OUTPUT CONNECTORS...........................................................................13

12. RS-232 INTERFACE, SOFTWARE INSTALLATION AND OPERATION..13

1. INSTRUMENT CARE

Do not attempt to remove the mesh cover from the microphone as this will cause

damage and affect the accuracy of the instrument.

Protect the instrument from impact. Do not drop it or subject it to rough handling.

Transport it in the supplied carrying case.

Protect the instrument from water, dust, extreme temperatures, high humidity and

direct sunlight during storage and use.

Protect the instrument from air with high salt or sulphur content, gases and stored

chemicals, as this may damage the delicate microphone and sensitive electronics.

Always turn the instrument off after use. Remove the batteries from the instrument if

it is not to be used for a long time. Do not leave exhausted batteries in the

instrument, as they may leak and cause damage.

Clean the instrument only by wiping it with a soft, dry cloth or, when necessary, with a

cloth lightly moistened with water. Do not use any solvents, alcohol or cleaning

agents.

2. FEATURES

The Sound Level Meter complies with the requirements of IEC 61672-1:2003 standard

for a Class 2 instrument.

The instrument contains several features which permit sound level measurements

under a variety of conditions.

Features include:

Ease of use.

Easy to read large display.

Five measurement ranges.

Fast and Slow time weightings.

A and C frequency weightings.

Storage of up to 32000 measurement records.

RS-232 serial port for downloading records to a computer or real time analysis to a

computer.

Both AC and DC signal outputs are available from a single standard 3.5mm

coaxial socket suitable for use with a frequency analyzer, level recorder, FFT

analyzer, graphic recorder, etc.

3. MEASUREMENT PARAMETERS

The following parameters are used on the instrument.

A →“A” frequency weighting sound pressure level

C→“C” frequency weighting sound pressure level

FAST→Fast time weighting

SLOW→Slow time weighting

SPL →Current time-weighted sound pressure level

SPL MAX →Maximum time-weighted sound pressure level

The various settings depend on the condition the instrument was in before it was last

turned off.

4. SPECIFICATIONS

Applicable standards: IEC61672-1: 2003 Class 2

IEC60651: 1979 Type 2

ANSI S1.4: 1983 Type 2

Measurement functions:

•Main processing functions

Sound level: Current time-weighted sound pressure level A or current time-

weighted sound pressure level C

Maximum time-weighted sound pressure level A or Maximum time-weighted

sound pressure level C

•Total range: 30 to 130dB

•Max. measurement level: 130dB

•Total linear operating range: In accordance with IEC 61672-1, A-weighted,

1000Hz: 30dB to 130dB.

•Level range selection: 5 ranges in 10dB steps 30 to 90dB, 40 to 100dB,

50 to 110dB, 60 to 120dB, 70 to 130dB

Frequency range: Overall characteristics including microphone: 31.5 to 8000Hz

Frequency weighting: A,meets the requirement of IEC 61672-1 for class 2

“A” weighting.

C,meets the requirement of IEC 61672-1 for class 2

“C” weighting.

Time weighting (RMS detection): Fast, according to IEC 61672-1 class 2.

Slow, according to IEC 61672-1 class 2.

•Reference conditions:

Type of the acoustic field: Free

Reference sound pressure level: 94.0dB (related to 20µPa)

Reference level range: 60 to 120dB

Reference frequency: 1000Hz

Reference temperature: +23℃

Reference relative humidity: 50%RH

Reference static pressure: 101.325 kPa

Reference incidence direction: Perpendicular to the front of the microphone

diaphragm.

•Calibration: Acoustic using sound calibrator.

Calibration check frequency is 1000Hz.

Nominal calibration level for the free field: 94.1dB

Nominal calibration level for the diffuse field: 94.0dB

•Frequency for acoustic testing: 8000Hz.

•Warm-up time: ≦2min

•Sampling interval: Bar graph indication →125 ms approx.

Numeric indication →1 sec approx.

•Data record capacity: Data can be stored in the memory.

Max. 32000 data can be stored.

Max. 255 blocks can be split.

Display LCD

•Display screens:

4 digit numerical indication of sound level, from 30.0 to 130.0dB with 0.1dB

resolution.

Bar-graph indication of current sound level with 1dB resolution.

Sound level range indicator: 30–90dB, 40–100dB, 50–110dB, 60–120dB or

70–130dB in five ranges.

Time display; year – month – day and hour: minute: second.

•Display update rate: 1 second

•Display first indication: Depends on the condition the instrument when it was last

turned off.

•Warning indications:

Out-of-range indications: OVER displayed at upper limit of the range

UNDER displayed at lower limit of the range

Outputs

•AC output (using selected frequency weighting)

Output voltage: 1Vrms (at full-scale of the range)

Output impedance: 5kΩ

Load impedance: ≧1MΩ

•DC output

Output voltage: 10mV/dB

Output impedance: 5kΩ

Load impedance: ≧1MΩ

•I/O connector: Sound level meter control from and data output to a computer (RS232)

Clock: Real–time (with calendar)

Power requirements

•Qty 4 x 1.5V IEC R6P (size “AA”) manganese super heavy duty batteries or

equivalent.

•Battery life: Approx. 50 hours

•Internal back-up battery: Maintains real-time clock operation for at least 6 months

(typically) if fully charged.

•External power source: DC voltage from 5V to 12V

Current rating: Approx. 10mA @ 6V

Ambient conditions:

•Operating conditions: -10°C to +50°C, 30% to 90%RH non-condensing

•Storage conditions: -10°C to +60°C, <70%RH non-condensing

•Effect of temperature: < 0.5dB (-10 to +50°C)

•Effect of humidity: < 0.5dB (for 30%RH to 90%RH at 40°C, 1000Hz)

Dimensions: Approx. 265(L)×72(W)×36(H) mm

Weight (including battery): Approx. 380g

Supplied accessories: Instruction manual, Batteries, Adjustment screwdriver, PC

software, Windscreen, RS-232 connecting cable, 3.5φplug,

Carrying case.

Optional equipment (Not supplied): AC adaptor, Sound calibrator.

5. CONTROLS AND FUNCTIONS

1. Microphone :

Electret Condenser microphone

2.Display: The LCD shows the sound level as a numeric value and a bar graph. The

display also shows the operation mode of the instrument, the selected measurement

parameters, warning indications and real-time clock/calendar.

3. Button: Press to turn the instrument on and off.

4. Button: cLevel range buttons: select the level range for the measurement.

The following five settings are available: 30 to 90dB, 40 to 100dB,

50 to 110dB, 60 to 120dB, 70 to 130dB.

dPress these buttons to increment or decrement setting values.

5. Button: Used for reading the maximum time-weighted sound level

encountered during a measurement.

Press this button to enter maximum recording mode. The “MAX”

indicator will appear on the display. Press again to exit maximum

recording mode.

6. Button: Sets the frequency weighting to A or C mode.

7. Button: cSets the time weighting to FAST or SLOW mode.

FAST: uses a 125ms time-constant. This setting is used in most

situations.

SLOW: uses a 1s time constant, which smoothes out fluctuating

levels.

dData record mode: Press and hold this button for 3 seconds to

enter data recording mode. The “RECORD”

indicator will appear on the display and will

flash to indicate recording is in progress. To exit

data recording mode, press and hold for 3

seconds until the instrument returns to normal

mode and the “RECORD” indicator disappears.

eErase all records: Turn off the instrument, press and hold down this

button then turn on the instrument until the “CLr

RECORD” indication appears on the display.

8. I/O connector: RS232 input/output connector for input of control signals and output

of measurement data.

9. AC output socket: AC output signal with frequency weighting.

10. DC output socket: DC output signal corresponding to sound level.

11. CAL potentiometer: Calibration potentiometer for level adjustment.

12. External DC power supply socket: Type 1.3 coaxial power connector; centre

negative, nominal 6V DC.

13. Tripod mounting: ¼” - 20 UNC Female thread.

14. Battery cover.

6. DISPLAY DESCRIPTION

1. Sound level range indicator (5 ranges): 30–90dB, 40–100dB, 50–110dB, 60–120dB

and 70–130dB

2. Bar graph shows the current sound level (1dB resolution).

3. Current date/time and maximum SPL measurement time.

This indicator shows the “year - month - day” or “hour: minute: second”.

4. DATE: Current date (year – month – day).

5. SPL: Current time-weighted sound level reading “Sound Pressure Level”

6. Low-battery indication

7. MAX: Maximum time-weighted sound level reading.

8. RECORD: Data records indicator

9. Sound level reading (0.1dB resolution): 30.0 – 130.0dB

10. FULL: Data records full indicator

11. dB: Sound level unit

12. A, C: “A” Frequency weighting or “C” Frequency weighting indicator.

13. TIME: Current time (hour: minute: second)

14. OVER: Over-range indicator.

15. SLOW: “Slow” time weighting indicator

16. FAST: “Fast” time weighting indicator

17. UNDER: Under-range indicator.

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