background image

407780A

EU

EN

 

v1.3

   

4/14

 

 

11

7.

 

To

 

set

 

the

 

recording

 

function

 

to

 

start

 

at

 

a

 

preset

 

time;

 

a)

 

Press

 

and

 

hold

 

the

 

DATE

 

TIME

 

button

 

for

 

2

 

seconds

 

to

 

enter

 

the

 

PRESET

 

recording

 

start

time

 

setting

 

mode,

 

the

 

PrE

 

symbol

 

will

 

be

 

displayed.

 

b)

 

A

 

flashing

 

cursor

 

indicates

 

the

 

currently

 

selected

 

parameter

 

(seconds),

 

use

 

the

 

▲▼

buttons

 

to

 

set

 

the

 

current

 

second.

 

c)

 

Press

 

the

 

DATE

 

TIME

 

button

 

to

 

move

 

to

 

the

 

next

 

parameter

 

(minutes)

 

and

 

use

 

the

▲▼

buttons

 

to

 

set

 

the

 

current

 

minute.

 

d)

 

Repeat

 

step

 

c)

 

to

 

set

 

the

 

current

 

hour,

 

day,

 

month,

 

and

 

year.

 

e)

 

Press

 

DATE

 

TIME

 

to

 

store

 

the

 

start

 

time,

 

and

 

to

 

exit

 

this

 

mode.

 

f)

 

The

 

 

and

 

‖ 

symbols

 

will

 

flash

 

until

 

the

 

start

 

time

 

has

 

been

 

reached.

 

The

 

 

and

 

‖ 

symbols

 

will

 

then

 

stop

 

flashing

 

and

 

the

 

REC

 

symbol

 

will

 

begin

 

flashing,

 

indicating

 

that

 

the

 

measurements

 

are

 

being

 

taken

 

and

 

that

 

recording

 

has

 

started.

 

 

Clearing

 

stored

 

data

 

1.

 

Press

 

the

 

 

button

 

to

 

switch

 

OFF

 

the

 

meter.

 

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

 

frequency

weighted

 

signal

 

is

 

available

 

at

 

this

 

connector.

 

Output

 

voltage:

 

2Vrms

100mVrms

 

(scale

 

upper

 

limit)

 

Output

 

impedance:

 

approx.

 

5k

Ω 

Load

 

impedance:

 ≥ 

1M

Ω 

The

 

output

 

voltage

 

when

 

the

 

instrument

 

is

 

in

 

calibration

 

mode

 

(

6dB

 

from

 

scale

 

upper

 

limit,

 

1000Hz

 

sine

 

wave)

 

is

 

0.5Vrms.

 

DC

 

Output:

 

A

 

level

converted

 

DC

 

signal

 

generated

 

by

 

RMS

 

detection

 

and

 

logarithmic

 

compression

 

is

 

available

 

at

 

this

 

connector.

 

The

 

signal

 

reflects

 

the

 

frequency

 

and

 

time

 

weighting

 

settings

 

of

 

the

 

instrument.

 

Output

 

voltage:

 

10mV

0.1mV/dB

 

Output

 

impedance:

 

approx.

 

5k

Ω 

Load

 

impedance:

 ≥ 

1M

Ω 

The

 

output

 

voltage

 

when

 

the

 

instrument

 

is

 

reading

 

94dB

 

is

 

nominally

 

0.94V

 

DC.

 

 

 

 

www.

.com

[email protected]

1.800.561.8187

Summary of Contents for 407780A

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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 ...

Page 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...

Page 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 ...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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 ...

Page 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...

Page 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...

Page 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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