BRUEL & KJAER 1623 - Power Supply Type 2808

BRUEL & KJAER 1623

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Examples of Use

Vibration

Analysis

The

1

623

is a

valuable

accessory

to

the

portable

Vibration

Meter

Type

2511

.

Fig.8

shows

the

two

instru-

ments

mounted

in a

sturdy

carrying

case

to

make

up

a

versatile

vibra-

tion

analysis

system.

With

the

two

instruments

alone,

manually-swept

frequency

analyses

can be

per-

formed;

the

addition

of

a

battery

op-

erated,

portable

Level Recorder

Type

2306

or

2309

will

permit

fre-

quency

analyses

to

be recorded

on

amplitude

and

frequency

calibrated

paper.

The

addition

of

a

tracking

pick-up

will

allow

the

vibration

ana-

lysis

of

fundamental

and

harmonic

components,

as a

function

of

a

ma-

chine

's

running

speed,

to

be

per-

formed

and

recorded. These i

nstru-

ments

combinations

are

shown

in

Fig .7 .

Fig.8

.

The

Portable

Vibration

Meter

Type

2511

combined

with

the

Tracking

Tunable

Filter

Type

1623

mounted

in

a

sturdy,

hard-foam

carrying

case

KA

2000

Monitoring/Measuring

~lerometer

Vibration Exciter

4801

+ 4813

2626

Conditioning

Amplifiers

Measuring

Amplif

i

er

2610

Tracking Filter

1623

l

~

l:

:c

~

:

:l

~l

t®

;;

:

~

:

:

·.

-

·

@

;. ;

....._

_____

.....

Power Amplifier

2707

~--~~--~~

Exciter Control

1047

Filter

Tuning

Si

gnal

--,

I

I

I

I

Chart I

Synchronisation I

I

t

I

I

Constant

Level

Output I

-~

Adaptor ZM 0100 I

I I

L

__

_________

_

_j

16

0989

/2

Fig.9

.

Typical

instrument

set

-

up

for

vibration

testing

where

a

Tracking

Filter

Type

1623

is

used

for

filtering

the

test

object

response

signal

Vibration

Testing

In

swept

frequency

vibration

test-

ing, a

tracking

filter

is

often

used

to

filter

the

test

object

response

sig-

nal. A typical

instrumentation

set-

up

showing

this

application

is

shown

in

Fig.9.

Used

in

the

monitoring

of

vibra-

tion

tests,

the

1

623

will

allow

the

recording

of

both

the

fundamental

and

the

harmonic

responses

of

test

objects.

Harmonic

Distortion

Measure-

ments

on

Audio

Systems

Recording

the

various

harmonic

components

produced

by

audio

rep-

roduction

systems

is

straight-for-

ward

when

using

the

Tracking

Filter

Type 1

623.

The

sweeping

fre-

quency

test

signal

from

a

sine

gen-

Pickup under Test

erator

or

test

recording

is also used

to

tune

the

tracking

filter

, and

the

required

harmonic

is selected on

the

1623

multiplier-divider

facility.

I

I

t

Measuring Amplifier

2610

Chart Synchronisation 1

~-------....J

Level

Recorder

2307

Filtered

nal

Tracking Filter

1623

760853

/ 1

Fig.1

0.

Instrument

set

-

up

for

plotting

harmonic

distortion

curves

for

gramophone

pick

-

ups

5

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