BRUEL & KJAER 2209 Instrucciones de montaje

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4655

NTRAL

FLYGVERKSTADEN

ARllOGA

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ronikh

ISi

i~,

"or

en'ng

www.aef.se

3650

------------------------~----------------------

Brue

&K-cer

2209

mpu

Pre

d L

evel

valid from serial no. 496282

037-0114

,..

BROEL &

KJ.LER

Nrerum -Denmark

Service

Instruction 2209

2209

mpu

Ise

Precision

Sou

Level

Meter

valid from serial no. 496282

037-0114

2209 page date B & K

Sub-Assemblies

page

date

Service I

nstruction

Checking

Procedure

0-1

0-2

1-1

, .

1.74

5.72

0007

0094

0095

Input

Stage

Output

Amplifiers

Meter

rcuit

1.74

Power

Supply

Meter

Circuit

1-2

2-1

3-1

1.74

0102

0071

0032

Preamplifier,

Filter

Pc;>wer

Supply

RMS

Circuit

1.74

3-2

5.72

3-3

5.72

Output

Amplifier

4-1

1.74

4-2

5.72

Input

Amplifier

5-1

1.74

5-2

5.72

Weighting

Network

6-1

5.72

Circuit

Diagram

and

Part

s List

7-1

1.74

Trouble Shooting

any

faults

should

occur

please

check

the

instrument

according

the

procedure

outlined

below.

When a

fault

has

been

traced

and

corrected,

the

voltages

and

adjustments

influenced

the

correction

must

rechecked.

The

complete

instrument

should

then

tested

according

the

Checking

Procedur

make

sure

that

all basic

functions

are

operative.

The

tolerances

given

these

notes

are

intended

for

use as

guide

for

adjustments.

Before

correcting

any

apparent

deviation

make

sure

that

the

measuring

instrument

has

tolerances

small

enough

not

aftect

the

measurement.

Spare

Parts

Please

state

type

and

serial

number

the

Impulse

Precision

Sound

Level

Meter

when

ordering

spare

parts.

2209·1.74

0-1

I o

(fl

ii·

;'.

o·

:::J

Range

(blackl

__________

Range

(transparent)

2100

1406

Jp 2702_

2702

Connector

Jp 1001

(

A /

0004

'-J

.j:>.

Filter

Switch

Meter

Switch

i1IQfi

/ T

••

--....-

1~'

t7'

IIILT"'\

0187

2004

lej

I---

Adj

Ref. voltage

@-.

- L. .

Adj.

Pol._voltage

0451

CDO

0076

@ @

/ .

r.-;

BROE

L &

KJJER

Ncerum -Denmark

Checking

Procedure

2209.1

Block Diagram

0007

0187

Input

Stage

Connect-

ing

Board

3.16 V

Attenuator

1.1. Sensitivity

RANGE (black):

"120"

RANGE (transp.) :

"120"

Fl LTER SWITCH:

"Lin"

METER SWITCH:

"Fast"

Fl LTER SWITCH to "A-B-C-

1_2_

Frequency Response

RANGE (black):

"120"

RANGE (transp.):

"120"

Fl LTER SWITCH:

"Lin"

METER SWITCH:

"Slow"

2209-5.72

Ext.

Filter

Ext

Filter

"In"

"Out"

0.2V

Pre.

Amp. Out.

Amp.l

ZE 0102

Ot02

0094

Weight

ing or

Network

o >

Filter Filter

Attenua.tor

Switch

Pha

Inverter

. .

O 110

a....rload

0.5VAC

(in"Rec

." 5V)

r-------------------------------~~

~AC

Output

.. Rec."

~------~--~~~DC

OverIoad"

R~S

approx

ZL 0032

0095

0094

> >

'rom Z G 0071

Output

Amp.

Overload

"OverIoad"

:0 .

;("

Ujl

Frequency Oscillator 2209

Input

signal

front

end

2209: 3.16 V. 1000

Adjust

"Gain

Adj

for

1OdB deflection (Adjustment

range

for

"Gain

Adj

approx. +3,

-10

dB).

Output

voltage

"Ext.

Filter

In":

0.2 V

"OC

Output"

Approx

. 1 V (measured

with

High Imp. Voltmeter)

"AC

Output"

: Approx. 0.5 V

Output":

5 V

for

METER SWITCH

"Rec"

Oeflection

for

all

ranges

dB ±0.1 dB.

Frequency: 1000 Hz.

Adjust

the

input

voltage

for

a9 dB deflection on 2209.

Varv the frequency from 2 Hz (or 10 Hz) -70

kHz

Meter deflection:

8-10

dB.

Valid

from

ial

no.

372528

1- 1

2209.1 Checking

hocedure

1.3. Meter

Circuit

RANGE

(black)

"120"

RANGE (transp.':

"120"

FILTERSWITC

"lin"

METER

SWITCI I:

"Fast"

METE R SWITCI

"Peak"

METER

SWITCI :

"Imp

(Norm.!"

METER

SWITC~

"lmp.

(Hold)"

1.4. Overload

Indicat

RANGE

(black):

"110"

RANGE (transp.l :

"110"

FIL

TER

SWITO

"Lin"

METER

SWITCH

"Fast"

1.5.

Noise

RANGE (black):

"60"

RANGE

(transp.l·

"10"

FILTER

SWITH(:

"A"

METER SWITCH .

"Slow"

RANGE (black):

"60

RANGE (transp.l .

"30"

Fl LTER

SWITC~

"Lin"

METER

SWITCH

"Fast"

RANGE

(black):

"130"

RANGE (transp.)

"80"

FlLTE R SWITCH

"Lin"

METER

SWITCH

"Fast"

1.6. Sensitivity with

licrophone

RANGE

(black):

"Ref"

RANGE

(transp.l :

"Ref"

FIL

TER

SWITC~

"lin"

.METE R SWITCH

"Fast"

RANGE (black) t,

"120"

Frequency: 1000 Hz.

Adjust

the

input

voltage

give exactly 7 dB deflection on 2209.

Meter deflection: 10

±0

.5 dB.

Adjust

the

input

voltage to give a B.6 dB deflection on 2209.

Disconnect the

input

signal by depressing

"Oscillator

Stop"

on the Beat Frequency Oscillator

and

check

that

the deflection

OdB af

ter

2·4

sec.

Connect

input

signal. Meter deflection: 9 dB.

Disconnect

input

signal and check that the deflection drops max. 0.5

in one minute.

Input

signal: 7 V, 1000 Hz (corresponding to approx.

above

full

scale

deflectionl.

Depress

"Oscillator

Stop"

on the Beat Frequency Oscillator. When releasing

"Oscillator

Stop"

both

"Overload

indicators"

should

light

a few times.

Connect

Input

Adaptor

JJ 2615

Type 2209 and shortcircuit its

input.

Notice'

Make sure that the contact surfaces

are

clean and dustfree.

Meter deflection: Below OdB.

essentiai

that

the measurement

carried

out

in a

quiet

room.

the Sound Level Meter

has

been

overloaded, the

instrument

must

work

for

several minutes before the meter

reaches

its

normal deflection.

Meter deflection: Below O dB

Remove Preamplifier

0007, and measure the noise

with

apen

input.

Meter deflectian: Max. 3 dB.

Adjust

"Gain

Adj."

the carrect

"Open

circuit

sensitivity"

the micraphane.

Check the sensitiv

ity

with

a Pistanphane

Type

4220 or Sound Level Calibratar

Type

4230

. The

meter deflectian on 2209 should

equal

the Sound Pressure Level produced by the

ton·

phane (Remember

correct

for

the actual static pressure).

Tolerance: ± 0.2 dB.

1-2

2209-1.74

901

2kJ\

-9

.5 V

-2!j

BROEL

KJ..LER

Ncerum

Denmark

Power Supply 2209.2

-9.5 V

+ 5 V

-2.9V

200V

+ 120 V

Battery

3-4.6V

+49

Simplied Diagram of Power Supply

0071

Normal delay from switching

"ON"

till the instrument

stabilized

approx.

see.

2.1 .

Voltages

METER

SWITCH:

"Batt"

Check

the

DC·voltages according to the drawing

the pr

ted circuits

0335

showed on

0071.

the

-9

.5 V

present and

the

Oscillator frequency

approx. 2 kHz the transformer can be

regarded

an ordinary mains transformer with secondary voltages for

the

various circuits,

Small deviations in voltages can be adjusted by the

potentiometers

according

following scheme,

whereby greater deviations are rather

due

a fault which should

corrected before adjustment.

Consumption from

the

batteries in position

"Ref"

approx,

210

mA,

"Ext,

Filter"

approx

195

mA,

Adjustment

902:

-9

.5 V

903:

200

V (Measured with a high impedance voltmeter)

p 904:

The transistors V

910

and 911 are acting as

battery

regulators and the

emitter

voltage on both

should be approx.

-2,9

this voltage

-2.9

Vand

the

converter

not

oscillating disconnect

the

different loads one

one.

oscillation

impossible even unloaded the transformer or

the

converter transistors

907

and 909) are likely to be defective.

the

-2

.9 V

not

present examine transistor V

901,902,

905

906

for faults as this

the

regulating circuit for V

910

and 911,

Valid from serial no,

372528

2209-1,74

2-1

PSOl

Normf

Hold

Roc

----,

ow~6

Fast

----o

Imp

-~~~

Imp.

==::..r

P.ak

~~---r~------------~----~--~------------~--~~----~--------

BROEL &

KJJER

2209.3

Nrerum -Denmark Meter Circuit

Adju

stment

of:

P501

P601

P602

P603

P604

R703

3.1. Sensitivity Check

RANGE (black):

RANG E (transp.):

LTER

SWITCH:

METER SWITCH:

b. METER SWITCH :

e. METER SWITCH:

d. METER SWITCH:

3.2. Sensitivity

Adjustment

a. RANGE (black):

RANGE (transp.) :

FILTER

SWITCH:

METER SWITCH:

b. METER SWITCH:

2209-1.74

RMS

Balanee

DC on V 604 50urce

Sensitivitv " Hold"

Sensitivitv

mpulse"

Sensitivitv

"Fast"

and

"Slow"

Batterv Indieation

"120

"120"

xt.

Filter"

" R

"Fast"

"lmp

(Norm)"

"Imp.

(Hold)"

"120"

xt.

Filter

"Rec"

"Fast"

Frequenev

Osc

lator

Frequenev 1000 H

Adjust the in

put

voltage for 5 V

S on

"AC

output"

socket.

Meter

fleetion: Exaetlv 10 dB.

Meter deflection: Exaetlv 10 dB.

Depre

"Meter

Reset" and

release

again.

lee

tion: \O dB.

Frequency: 1000

Hz.

Adjust the

input

ltage

for

5 V

S on

"AC

Output"

socket.

Cheek

with

illoscope

that

the doub

ied eurv

on the cathodes

3 and Q 504

are

equal.

(ZL

003

necessary adjust P803. (

0094) .

Valid

from

serial no. 372528

-9SV

opprox.

~~~~~----------------~-----------------------+sv

•

[

1----

-+4-,.;:

~ -

....

2209

3-1

----

2209.3 Meter Circu

METER

SWITCI-.

"Imp"

METER

SWITCH

"Fast"

METER

SWITCH

"Imp.

Hold"

METER

SWITCH

"Peak

Hold

METER

SWITCH

"Ban"

Overshoot

RANGE

(black)'

"120"

RANG

E (transp.1

"120"

FILTER

SWITCI- :

"Ext

Filter"

METER

SWITCH "

Fast"

3.4. Meter Decay TimEConstants

RANGE

(black):

"120"

RANGE

(tramp

.):

"120"

FILTER

SWITCH

"Ex!.

Filter"

METER

SWITCH

"Imp"

METER

SWITCH:

"Imp.

Hold"

Disconnect

input

signal.

Unsolder one end

diode

Q 601.

Adjust

P 601 (ZE

0095)

for

O V ± 5

on V 604 source.

Connect

input

signal.

Adjust

p 603

for

full

scale

deflection

(lOdB).

When

connecting

input

signal

the

deflection

on 2209 should

exactly

dB.

If necessary adjust P 604.

Depress

"Meter

Reset"

shortly

and check the meter

deflection:

dB.

If nece

ary adjust P 602.

Adjust

for

a meter

deflection:

dB.

Switch

Meter

Switch

"Fast"

and check

deflection:

dB.

With

battery

voltage

3.0 V - 3.1 V

the

meter should

deflect

the

lower

mark

the

banery

scale.

necessary change in value

703

Frequency:

1000

Hz.

Adjust

input

voltage

for

6 dB

deflection

on 2209.

Disconnect the

input

signal

shortly

by depressing the

"Oscillator

Stop

" on the Frequency Oscil·

ator

and check the overshoot.

Overshoot:

0.1-1.1

for

METER

SWITCH in

"Fast"

0.1-1

.6 dB

for

METER

SWITCH in

"Slow"

max. 0.1 dB

for

METER

SWITCH in

"Imp.

Hold"'

)

' ) Before

"Oscillator

Stop"

released

for

check

overshoot depress

"Meter

Reset"

2209.

Frequency:

1000

Hz.

Adjust

the

input

voltage

for

8.6

deflection

on 2209.

Disconnect the

input

signal and meaSure the

time

takes

for

the

pointer

to decrease

from

8.6 to

OdB.

Tolerance: 3 ±0.5

sec.

Adjust

the

input

voltage

for

deflection

2209.

When the

input

signal

disconnected the meter

deflection

must

not

decrease

than 0.5 dB in

one

minute.

(Only

valid

for

0 C and max. 60% relative

humidity)

3-2

2209-5

.72

Meter Circuit 2209.3

~r-

~.:

Frequency O

illator I

3.5. Check

RMS Rectifier

RANGE

(black):

RANGE (transp.):

FILTER

SWITCH:

METER SWITCH:

"120"

Lin"

:~~

B '

• •

••

0 ®

;

:.'

.}.

.....:...=...

Frequency O

illator

II 2209

Depre

Ilator

Stop"

Frequency Os

Ilator II

and

adjust

output

Frequency Oscil·

latar I

give a 7 dB deflection on 2209.

Depre

"Oscillator

Stop"

Freuqency Oscillator I and adjust

output

Frequency Oscil·

latar

give a 7 dB deflection

2209.

With signal from both oscillators the deflection on 2209 should

±0

.1 dB (evt.

uno

linearity

2209 meter

scale

0.2 dB).

O -O O

t~~

Oscilloscape

Pu l

Generator 2209

----

[---V,.V

•5

n-----,~p

----v

RMS

leMS n

1 : 2 1 : 4

3.6. Check

RMS

Indication

RANGE (black):

"120

dB"

a pulse duration

0.1

See.

and a ratio

1.2 the

input

voltage

2209 should be adjusted

RANGE (transp.):

"120

dB"

give

a 0.2 dB deflection.

Fl LTER SWITCH:

"Lin"

METER SWITCH:

"Slow"

Check the indication

for

various pulse ratio according

following scheme.

RANGE

(black) t

T Vp

RMS

Indication

120 dB 1 : 2 1 0.2 dB

110dB

1 : 5 2

8.1

dB ± 0.5 dB

110 dB 1 :

3 5.6 dB ± 0.5 dB

110dB

1 :

5 1.7 dB ± 0.5 dB

100dB

100 10 6 dB ± 0.5 dB

100 dB

200 14 3 dB ± 1 dB

100 dB

400 20 OdB ± 1 dB

100 dB

900

-3

.5 dB ± 1.5 dB

2209-5

.72 Valid

from

serial no. 372528

3-3

.sv

AC Output

(Roc

BROEL &

KJ,lER

Nrerum -Denmark Output Amplifier 2209.4

U01

1--I---+--ilU

160

mVv

r--------r--...,.....----9,5

Adjustment

of:

P801 Sensitiv

ity

P802 Sensitivity at 2 Hz

P803

Symmetric

Output

P501 RMS Balance

.120

.sr-

t.mJ

;

•

••

4,1. DC·Voltages Frequency Oscillator 2209 Frequency

Analyzer

METER

SWITCH:

"Rec"

The DC·voltages across R

809

should

approx.

4 V negative.

necessary change

value

R 804.

From

midpoint

R 826, R

827

ground the vol

tage

should

57-63

necessary change in value

822

(56-120

km.

From

midpoint

R 835, R

836

ground t

voltage should

57-63

neoessary

ange

in value of R 8:11

7-8

kUl.

2209-1.74

Valid

from

rial no.

372528

4-1

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