Extech Instruments 407780A Скачать руководство пользователя | Manualshive

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407780A

‐

EU

‐

EN

v1.3

4/14

6

13.

dB:

Sound

level

unit

(decibel)

14.

A,

C:

A

or

C

frequency

weighting

indicator.

15.

IMP:

Impulse

time

weighting

indicator

16.

OVER:

Over

‐

range

indicator

appears

flashing

when

over

‐

range

measurements

have

been

included

in

the

sound

level

measurement

data

recording

session.

17.

SLOW:

Slow

time

weighting

indicator

18.

FAST:

Fast

time

weighting

indicator

19.



:

Indicates

that

integrating

sound

level

measurements

have

been

stopped.

20.

:

Indicates

that

integrating

sound

level

measurements

are

paused.

21.

:

Start

and

continuous

integrating

measurement

indicator.

22.

UNDER:

Under

‐

range

indicator

appears

flashing

when

under

‐

range

measurements

have

been

included

in

the

sound

level

measurement

data

recording

session.

www.

.com

[email protected]

1.800.561.8187

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Содержание 407780A

Страница 1: ...USER GUIDE Integrating Sound Level Meter and Datalogger Model 407780A www com information itm com 1 800 561 8187 ...

Страница 2: ...ich permit sound level measurements under a variety of conditions Features include Five measurement ranges Fast Slow and Impulse time weighting settings A and C frequency weighting settings Storage of up to 32000 measurement records USB serial port for downloading records to a computer or real time analysis AC DC signal outputs are available from a single standard 3 5mm coaxial socket suitable for...

Страница 3: ...d 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 switch the instrument off after use Remove the batteries from the instrument if it is not to be used for a long period of time Do not leave exhausted batteries in the instrument as they may leak and cause damage Clean the ins...

Страница 4: ...itch 8 FAST SLOW IMPULSE time weighting select switch FAST 125ms SLOW 1 second IMPULSE 35ms with slow decay 9 MAX button 10 RECORD ERASE button 11 Real time clock button 12 Integration time button 13 Alarm output 14 AC DC output 15 CAL calibration adjustment 16 External power input USB input located on bottom not shown Tripod mounting screw located on rear not shown Battery cover located on rear n...

Страница 5: ...ator displays L 05 L 10 L 50 L 90 or L 95 4 Leq Equivalent continuous sound level reading 5 SEL Sound exposure level reading 6 SPL Time weighted sound level reading Sound Pressure Level 7 Low battery indication 8 MAX When displayed flashing it indicates that the Maximum time weighted sound level reading is shown When it is displayed solid it indicates that the Maximum sound level reading is displa...

Страница 6: ...ing session 17 SLOW Slow time weighting indicator 18 FAST Fast time weighting indicator 19 Indicates that integrating sound level measurements have been stopped 20 Indicates that integrating sound level measurements are paused 21 Start and continuous integrating measurement indicator 22 UNDER Under range indicator appears flashing when under range measurements have been included in the sound level...

Страница 7: ...surement the upper limit of the selected range has been exceeded Increase the range setting until the symbol remains off during measurements Similarly if the UNDER indicator appears reduce the range setting until the symbol remains off Both indicators are non latching and will clear when the correct range is selected 5 Hold the instrument comfortably in hand away from the body or position it on a ...

Страница 8: ... select the desired dB range Choose a setting in which the bar graph indication registers near the middle of the range If the OVER or UNDER indicators switch ON frequently change the level range setting 5 Setting the integrating measurement time Default or Manual Default times a Press the INTEG TIME button once to select a default integrating time b Use the buttons to select the measurement time c...

Страница 9: ...before starting the measurement Pause intervals are not included in the measurement time 7 When the measurement is completed paused or in progress press the Leq SEL SPL button to cycle through and display the following measurement results Leq Equivalent continuous sound level with start measurement time SEL Sound exposure level with terminate measurement time SPL MAX Maximum sound level with time ...

Страница 10: ...s 32000 records which can be stored in up to 255 blocks Recording can start when integration begins or at a preset time The stored data cannot be viewed on the meter s display it must be downloaded using the supplied PC software 1 Setting the data sampling rate a Press the button to switch OFF the meter b Press and hold the INTEG TIME button and then switch the meter ON the Intr symbol and the sam...

Страница 11: ...er 2 Press and hold the RECORD ERASE button and then press the button to switch ON the meter 3 The CLr symbol will appear on the display indicating that the data have been erased Analog outputs The analog outputs provide analog signals proportional to the measured values for recorders and other devices The outputs require a 3 5mm stereo mini plug AC Output An AC signal corresponding to the frequen...

Страница 12: ...asurement errors Such effect can be reduced by using the windscreen Tripod Mounting For long term measurements the instrument may be mounted on a standard camera tripod using the rear integral x 20 UNC mounting thread Alarm output If the measured dB level exceeds the set limit the over limit signal will appear at the alarm output connector 5Vdc output The output signal will remain active as long a...

Страница 13: ... ON 4 Adjust the meter s calibration potentiometer as shown in the accompanying diagram until the meter s display matches the acoustical calibrator output signal typically 94 or 114dB 5 Switch the calibrator OFF 6 Remove the calibrator from the microphone very slowly to avoid damaging the microphone 7 In cases where adjusting the potentiometer does not affect the displayed reading or where the adj...

Страница 14: ... 4 Replace and secure the battery cover 5 Press the button to switch ON the instrument Check for correct operation Never dispose of used batteries or rechargeable batteries in household waste As consumers users are legally required to take used batteries to appropriate collection sites the retail store where the batteries were purchased or wherever batteries are sold Disposal Do not dispose of thi...

Страница 15: ...el A or C SPL MAX Maximum sound pressure level A or C SPL MIN Minimum sound pressure level A or C PH Peak Hold sound pressure level A or C L 05 5 percentile sound level A or C L 10 10 percentile sound level A or C L 50 50 percentile sound level A or C L 90 90 percentile sound level A or C L 95 95 percentile sound level A or C SPL MAX Maximum time weighted sound pressure level MAX symbol blink Meas...

Страница 16: ...s 44 dB FREQUENCY Hz WEIGHTING L O R dB WEIGHTING L O R dB 31 5 A 36 1 50 6 C 39 5 87 0 1000 A 36 1 90 0 C 39 5 90 0 4000 A 36 1 90 0 C 39 5 89 2 8000 A 36 1 88 9 C 39 5 87 0 RANGE 40 100 dB Test starting point 74 dB for all weightings and frequencies except 31 5Hz A weighted for which the starting point is 54 dB FREQUENCY Hz WEIGHTING L O R dB WEIGHTING L O R dB 31 5 A 40 0 60 6 C 40 0 97 0 1000 ...

Страница 17: ... 70 0 129 2 8000 A 70 0 128 9 C 70 0 127 0 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 Impulse according to IEC 61672...

Страница 18: ...dication 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 s start up indication Depends on the condition of meter when it was last switched off Warning indications Out of range indications OVER displayed at upper limit of the ra...

Страница 19: ...eld No noticeable effect Standards Compliance indicates compliance with applicable European Union Directives EMC Emission IEC 61000 6 3 Generic emission standard for residential commercial and light industrial environments No significant emissions from the instrument IEC 61672 1 Instrumentation standard classification group X and performance class 2 sound level meter EMC Immunity IEC 61000 6 2 Gen...

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