BRUEL & KJAER 2211 Guía del usuario

Noise Limit Indicator

Type 2211

Type 2211 Noise

limit

Indicator

a noise

and

vibration

analyzer

designed

keep

control

the

noise

vibration

produced

units leaving

production

line.

BHUEL&KJJEH

NaHum, Denmark .

eyf;'

05 00 .

BRUKJA,

Copenhagen

. Telex:

5316

2211

Noise Limit Indicator

Type

2211

Reprint

April

1963

Contents

Introduction

the

Instrument

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Introduction

Noise

and

Vibration

Measurements

products

. . . . . . . . 4

'Vid

eband

Measurements

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Weighted

Measurements

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Frequency

Analysis

Noise

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Measurements

Selected

Frequency

Bands

. . . . . . . . . . . . . . . . . . . . . . . . 7

Capabilities

the

Noise

Limit

Indicator

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Which

data

must

known

fore

the

Instrument

used

..............

Wb.at

should

measured,

Noise

Vibration

. . . . . . . . . . . . . . . . . . . . . . . . . .

Practical

arrangements

when

"setting

up"

the

Instrument

..............

vibration

testing

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Noise

testing

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Use

the

Noise

Limit

lndicatol'

......................................

Pre-adjustments

.....

................................

....

.....

Adjustment

for

use

with

Microphone

Type

4131

-32

. . . . . . . . . . . . . . .

Adjustment

with

Microphone

................................

Vibration

Measurement

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Adjustment

the

"Sensitivity

Increase"

..........................

Operators

Instruction

............................................

Use

both

Inputs

sim

ult

aneous

...

.......

....

.......

Remote

Control

..................................................

Technical

Description

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Input

Amplifiers

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Filters

and

Output

Amplifiers

........

...

..............

......

...

Rectifier

and

Relay

Circuit

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Contro

Panel

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

l\feter

Circuit

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power

Supply

..........

....

...

............

....

......

Specification

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Introduction

The

Noise

Limit

Indicator

instrument

designed

provide

rapid

and

accurate

evaluation

the

quality

products

production

line

with

respect

noise

and

vibration.

This

achieved

measuring

the

noise

and

vibration

every

unit

leaving

the

production

line

and

comparing the

result

with

the

noise

and

vibration

level

obtained

from

the

"standard"

unit.

The

instrument

has

been

designed

offer

the

utmost

simplicity

operation.

After

setting-up,

unskilled

worker

can

easily

interpret

the

indicating

panel

and

thereby

the

acceptance

rejection

the

unit

manufactured.

Rejections

are

indicated

red

indicating

lamps.

this

way

the

possibility

confusion

errors

from

meter

readings

completely

eliminated.

The

instrument

measures

noise

and

vibration

several

frequency

bands

(up

to 12

bands

)

simultaneously.

The

operator

job

simplified

such

degree

that

only

presses

button

and

notes

any

lamp

lights

up.

These

units

ore

bought seperotely

~h~n_gC!!.!!Jing_tM_

fu)ig_

J.Lroii

Jn,dicotor

. 1 ....--Cathode FolloWI!r

2613

I I

/62202

QQQQQQ

QQQO.O.O.

0 0

....

;;

:.~

...

,.'"'

•••••

;

...

:::

"!.

;~~,..,_-..('

Control Panel

Fig.

The

Noise

Limit

Indicator

shown

with

the

necessary

extra

items

for

the

measurement

noise

and

vibration.

Two

input

channels

and

twelve

output

channels

with

filters can be

plugged

in.

lamp

lights,

the

operator

labels

the

unit

just

tested

with

number

corresponding

that

the

lamp,

and

directs

the

rejected

unit

the

repair

shop.

The

number

the

indicating

lamp

informs

the

repair

shop

the

frequency

which

the

presset

limit

has

been

exceeded,

thereby

often

giving

the

shop

hint

which

problem

has

corrected.

The

total

operation

time

for

the

assessment

the

apparatus

extremely

short.

When

set-up

practically,

the

testing

for

noise

and

vibration

can

normally

carried

out

less

than

ten

seconds

for

each

unit.

The

apparatus

devided

into

units

that

only

the

transducing

elements

i.e.

the

microphone

vibration

pick-up,

need

near

the

production

line.

The

main

unit

containing

the

amplifiers

and

filters

can

placed

some

distance

from

the

production

line

and

the

control

panel

with

indicating

lamps

may

placed

wherever

found

most

convenient

for

the

operator.

shown

Fig.

the

main

assembly

containing

power

supply,

meter

circuit,

input

amplifiers

and

output

amplifiers

is,

gether

with

the

control

panel,

supplied

the

basic

assembly

which

can

added

condenser

microphone,

vibration

pick-up,

and

many

filters

are

found

necessary

for

the

measurements

question.

Microphone

and

vibration

pick-ups

arc

readily

connected

plugs

the

rear

the

instrument

and

output

plifiers

and

filters

are

made

plug-in

units

which

are

easily

interchange-

able.

The

electrical

and

acoustic

specification

the

instrum

fully

described

page

43-44.

INTRODUCTION

NOISE

AND

VIBRATION

MEASUREMENTS

PRODUCTS

The

measurement

noise

and

vibration

may

carried

out

several

ways.

depending

upon

the

purpose

the

measurement.

Some

the

most

commonly

used

methods

are

discussed

below

order

give

summary

the

reasons

for

measuring

noise

from

production

line

uni

frequency

bands.

Noise

and

vibration

most

respects

act

similar

manner

, thu,;;

the

term

"noise"

will

used,

and

vibration

will

only

mentioned

where

noise

and

vibration

act

different

way.

Some

the

most

common

methods

measuring

noise

levels

are:

wideband

measurements,

i.e.

means

instruments

with

uniform

response

all

audible

frequencies.

noise

measurement

with

instruments

that

have

"weighted"

characteristics

frequency

analysis

noise.

measurement

selected

frequency

bands,

i.e.

with

instruments

thai

measure

noise

certain

pre-selected

frequency

bands

only.

\Videband

Measurements·

making

wid

eba

nwasurements

noise

levels,

trum

is used

that

res

ponds

qually

noi

'Se

all

ncies

within

the

audible

rang

which

from

20 c/s

20ooo

c/s

approximately.

This

that

the

measuring

instrum

gives

the

same

indication

for

all

sounds

qual

physical

"strength",

whether

the

sound

low

, me

dium

high

pitch

vVh

en m

eas

uring

noi

ntaining

several

nci

es,

the

wid

band

measurin~

instrument

will

defl

ect

value

which

proportional

to th

sum

energy

ntents

all

diff

ere

noise

frequencies

represented.

See Fig.

Thi

typ

eas

urem

is used

wher

is des

ired

measur

overall

sound

pressur

e level

certain

place.

.P.L.

usually

with

ref

ere

ncP.

the

accepted

hearing

threshold:

o.0002 t-tbar).

ir·r:::;.

Frequency

Microphone \

Fig.

Wideband

measurement

nois

The

meter

will

give an

indication

which

slightly

above

the

top

the

highest

peak

noted

the

frequency

spectrum.

Noise

all frequencies passes

unattenuated

the

meter.

"\Veigh

ted"

Measurements.

\Veighted

eas

eme

are

measur

eme

nts

taken

with

instrum

nts

which

hav

respons

e c

urv

that

certain

degree,

thos

human

The

human

appears

most

sensitive

medium

frequencies

and

efo

not

irritat

low

high

pitched

nois

The

frequency

espo

nse

"weig

ed"

measuring

trum

nts

then

shaped

such

way

approximate

nsitivity

curves

human

This

normally

done

ins

rtion

one

filt

wideband

amplifier.

Thr

different

filter

chara

e ristics

have

been

int

rnationally

standardized

for

thi

purpose.

•)

instrument

with

wideband

response

may

also

referred

one

with

response

which

linear,

overall,

flat.

the

measurement

noise

containing

several

frequencies,

the

instrument

measures

the

nois

sum

the

energy

contents

after

the

frequency

weighting

has

taken

place

see

Fig. 3.

Weighted

measurements

are

mainly

used

cases

where

desired

investigate

noise

interference

working

conditions

etc.

The

result

read

off

instrument

with

weighted

characteristics

the

sound

level

(different

from

sound

pressure

lev

and

stated

SL (=

. 2 X lo

-4

.ubar),

curve

A, B

Frequency

Microphone

Frequency Weighted

Level

-0

Frequency

162207

Fig.

Weighted

measurements.

~hown

the

noise

spectrum

shaped

means

a filter so

that

parts

the

noise

depressed

and

only

the

medium

frequencies are

allowed

pa.ss

unattenuated.

That

means

that

the

medium

frequencies

have

predominant

influence

the

meter

indication.

Frequency

Analysis

Noise.

Frequ

ncy

analysis

carried

out

instruments

that

are

capable

selecting

and

measuring

specific

noise

frequency

bands

only,

although

several

other

noise

frequencies

may

present.

The

frequencies

can

selected

means

series

filters

which

are

successively

inserted

wideband

measuring

instrument,

and

which

make

the

instrument

sensitive

only

certain

frequency

band

time,

see

Fig.

Usually

noise

measurement

the

audible

frequency

range

divided

into

number

bands

equal

relative

bandwidth.

Thus,

octave

band

analyzer

divides

the

audible

range

into

bands,

eac

with

the

width

one

octave;

a 1

octave

band

analyzer

divides

~r·es.

Microphone

Frequency

Noise

band

Level

------

/ I

I I

I \

L...C

.!!

!:!

QJ"C

L.E

Frequency

1622.05

Fig. 4.

Analysing

noise

means

a series

narrow

band

filters

that

can be

inserted

successively

the

amplifier.

Only

the

noise

having

frequency

that

falls

within

the

range

the

inserted

filter is

passed

the

meter.

The

meter

indication

this

way

becomes

frequency

depei..dant.

the

range

into

bands,

each

octave

wide.

example

such

analyzer

the

B & K

Type

2112

mentioned

page

11.

With

analyzer

this

type

the

noise

band

lev

can

measured

any

arbitrary

frequency

without

any

disturbing

influence

from

other

(and

perhaps

tronger

sounds

arriving

the

microphone

simultaneously.

this

way

possible

investigate

which

frequencies

are

predominant,

measure

their

"strength"

and

character

and

thereby

arrive

method

for

treatment

the

noise

problem.

Bands

narrower

than

octave

are

not

normally

used

noise

measurements;

however

the

investigation

vibration,

ana

lyz

with

filters

having

width

less

than

octave

would

often

employed.

The

B & K

Type

2107 is

examp

such

analyzer.

d) Measurements

Selected

Frequency

Bands.

Once

laboratory

investigations

have

been

carried

out

upon

objects

from

production

lin

(or

the

prototypes)

and

the

noise

and

vibration

generated

the

objects

analysed

e.g.

means

ana

lyz

mentioned

above

can

calculated

which

the

noise

frequencies

must

checked

production.

Often,

attention

may

confined

certain

important

frequencies

ortly,

and

other

bands

ignored.

special

instrument

which

measures

these

particular

noise

frequencies

(

see

Fig.

can

then

used

cheek

the

units

from

the

production

lin

Such

instrument

the

Noise

Limit

Indicator

Type

2211.

measures

noise

vibration

number

pre-selected

frequency

bands

simultaneous

ly.

The

bandwidth

can

chosen

octave

octave,

depending

the

cond

itions.

ES.

Microphone Frequency

Filter

characteristics

IIJ\£v\u.

Filters

Frequency c

rfiDI1

11r:

Frequency

220

Fig. 5.

This

figure

shows

the

measuring

principle

the

Noise

Limit

Indicator.

Several

filters

are

ins

erted.

The

meter

substituted

reel

lamps,

that

tl1ere is

indicator

for

each

filter.

Thereby

the

excess

the

noise

band

limits

several

filters

can

indicated

simultaneously.

The

filter

attenuation

can

adjusted

for

each

filter

incliviclually.

The

noise

frequency

bands

and

the

levels

set

the

maximum

limit

for

each

the

bands

sel

ected

should

chosen

result

careful

laboratory

investigation

the

object

examined.

may

also

desirable

keep

check

the

overall

noise

level

the

object

means

wideband

and

weighted

measurements.

The

Noise

Limit

Indicator

capable

checking

number

pre-selected

frequency

band

levels

well

the

overall

noise

level

both

wideband

and

weighted

simultaneously.

CAP

ABIT

ITIES

THE

NOISE

LIMIT INDICATOR

The

equipment

can

used

for

wide

range

tests,

since

number

measurements

can

carried

out

simultaneously

with

the

Noise

Level

Indicator.

Some

the

most

commonly

used

measurements

that

can

made

with

the

instrument

are:

Simple

"go-no

go"

testing

for

noise

vihration

both

simultaneously

(

see

Fig.

6a).

Otros manuales para 2211

Tabla de contenidos

Otros manuales de Instrumento de medición de BRUEL & KJAER

BRUEL & KJAER

BRUEL & KJAER 2203 Instrucciones de montaje

BRUEL & KJAER

BRUEL & KJAER 2006 Guía del usuario

BRUEL & KJAER

BRUEL & KJAER 2513 Manual de usuario

BRUEL & KJAER

BRUEL & KJAER 2107 Guía del usuario

BRUEL & KJAER

BRUEL & KJAER 1616 Manual de usuario

BRUEL & KJAER

BRUEL & KJAER 2976 Manual de usuario

BRUEL & KJAER

BRUEL & KJAER 2245 Manual de usuario

BRUEL & KJAER

BRUEL & KJAER Matron 3 Manual de usuario

BRUEL & KJAER

BRUEL & KJAER 2239 A Manual de usuario

BRUEL & KJAER

BRUEL & KJAER 2031 Manual de usuario

BRUEL & KJAER

BRUEL & KJAER 2236 Instrucciones de instalación y funcionamiento

BRUEL & KJAER

BRUEL & KJAER 4511-W-006 Manual de usuario

BRUEL & KJAER

BRUEL & KJAER 2240 Manual de usuario

BRUEL & KJAER

BRUEL & KJAER 1008 Instrucciones de funcionamiento

BRUEL & KJAER

BRUEL & KJAER 9737 Manual de usuario

BRUEL & KJAER

BRUEL & KJAER VIBROCONTROL 920 Manual de usuario

BRUEL & KJAER

BRUEL & KJAER 1101 Manual de usuario

BRUEL & KJAER

BRUEL & KJAER 4440 Manual de usuario

BRUEL & KJAER

BRUEL & KJAER 4294 Manual de usuario

BRUEL & KJAER

BRUEL & KJAER 2305 Guía del usuario

BRUEL & KJAER

BRUEL & KJAER PULSE 3560-B Guía

BRUEL & KJAER

BRUEL & KJAER 4320 Guía del usuario

BRUEL & KJAER

BRUEL & KJAER 2237 Manual de usuario

BRUEL & KJAER

BRUEL & KJAER BK Connect 9712-W-FEN Manual de usuario

Manuales populares de Instrumento de medición de otras marcas

Suaoki

Suaoki D40 Manual de usuario

Elster

Elster BK-G1.6 Manual de usuario

Endress+Hauser

Endress+Hauser Deltabar FMD71 Manual

Duratool

Duratool D03128 Manual de usuario

Vega

Vega VEGAPULS 65 Manual de usuario

Tonghui

Tonghui TH2618B Manual de usuario

Tenmars

Tenmars TM-801 Manual de usuario

MSR

MSR 145 Manual de usuario

TPS

TPS WP-82 Manual de usuario

ELMETRON

ELMETRON CP-511 Manual de usuario

PCB Piezotronics

PCB Piezotronics 003C30 Manual de usuario

Tenma

Tenma 72-10465 Manual de usuario

Endress+Hauser

Endress+Hauser Proline Promag 50 Especificaciones técnicas

Siemens

Siemens SITRANS F Coriolis FCT030 Manual de lista de piezas

KLINGER

KLINGER CMF V Series Manual de usuario

EXFO

EXFO FTB-2 Manual de operación y mantenimiento

Keysight

Keysight M8290A Manual de usuario

ADTEK

ADTEK MW-5 Manual de usuario