BRUEL & KJAER 1008 Instrucciones de funcionamiento

BROEL

KJ.ER

Ncerum

Denmark

Service

Instructions

Automatic

Vibration

Exciter

Control

Consisting

of:

Removal

the

Case.

Output Amplifier

Oscillator

Pick-up Amplifier

Compressor

M>tor Drive Circuits

Position

Components

Ports

list

Circuit Diagram

1008.1

1008.2

1008.3

1008.4

1008.5

1008.6

1008.7

1008.8

1008

After removing the eight HEX/HD screws on

the

front panel and the two screws in

the

bottom,

possible to slide the chassis

and

the front panel

out

the wooden

case.

For

rack mounting the metal

case

can

be pulled

out

after

the six HEX/HD screws on the side

the

instrument

are

removed.

Trouble Shooting.

the reason for a fault

not an obvious one such as a dead tube or transistor, broken down resistor, blown or disconnected

fuse

etc.,

then first test the voltages

all

the

tubes and compare them with

the

voltages shown in

the

circuit

diagram in order

loca-

lize

the

defect.

Should this method

finding the fault prove unsuccessful, then

check

the instrument by adopting

the

method

de-

scribed in

the

adjustment procedure. When the trouble has been found and remedied,

the

voltages and odjustmnets which

are

influ-

enced

the remedy

must

rechecked.

The

tolerances

stated

the

instructions can only be used as a guide

for

adjustment and

control,

but

any

deviations must not be

cor-

rected

without being sure

that

the tolerances

the instruments used

for

making

the

adjustment

are

small

to have no

influence

on the measurements.

The

instructions in this M>nual

are

given purely as a guide to the service

equipment with minor faults. Some faults, as

f.inst.

small deviations in tolerances require

for

their correction special control equipment and extensive

experience,

and

in these cases

necessary to send the instrument to the factory.

Spare Parts.

Please

state

type and serial number

apparatus when spare parts

are

ordered.

Instruments necessary

for

service and repair:

Frequency Analyzer type 2107

Oscilloscope

Frequency Counter

M.,ltimeter (50

µA)

1008 -

12.66

-BROEL

KJ,ER

Ncerum

Denmark

1.1. Calibration

Indicating

Meter.

METER

SWITCH:

"Output

Voltage"

SCANNING

SWITCH:

"Off"

FREQUENCY RANGE:

"5-5ooo

Hz"

COMPRESSOR

SPEED:

"Off"

OUTPUT

SWITCH:

"Linear"

FREQUENCY

SCALE:

"400 Hz"

.2.

Output

Voltage.

METER

SWITCH:

"Output

Voltage"

SCANNING

SWITCH:

"Off"

COMPRESSOR

SPEED:

"Off"

OUTPUT

SWITCH:

"Linear"

OUTPUT VOLTAGE: "10"

1.3 . Frequency Response .

METER

SWITCH:

"Output

Voltage"

SCANNING

SWITCH:

"Off"

FREQUENCY RANGE:

"5-5ooo

Hz"

COMPRESSOR

SPEED:

"Off"

OUTPUT

SWITCH:

"Linear"

FREQUENCY

SCALE:

"400 Hz"

FREQUENCY RANGE to "5005-lOooo Hz"

FREQUENCY RANGE to

"5-5ooo

Hz"

OUTPUT

SWITCH

to "High pass"

FREQUENCY

SCALE

"400Hz"

1008.1 -

12.66

Output

Amplifier

Valid

from

serial

no.

170230

P15

_,:'~

.y;.·Y~

• o-...: .. o

....

2117

1008.1

•

:::jt

Adjust

the

OUTPUT

VOLTAGE

for

Von

OUTPUT

socket.

Deflection on type

1008:10

If necessary adjust P

15.

Check

that

full

scale

deflection on type 1008 can

obtained in

the

entire

frequency range from 5-1

Oooo

Possible reason for

fault:

The blocking range

the cam discs on

the

rear

side

0009

within

the

frequency

range.

Too

low

signal across R

92.

The

voltage

hould

approx. 320

. If not

check

item 2.

Too

low

voltage

on V

cathode.

Adjust

the

OUTPUT VOLTAGE for

deflection

on type 1fl08•.

Vary the frequency

from

5-5ooo

Hz.

Deflection on type

1008:18

dB.

Tolerance:±

o.5

Possible reason for

fault:

Defective tube V 8

Defective filter Z

3,4

Vary the frequency

from

5005-1

Oooo

Hz.

Deflection on type 1008: 18 dB.

Tolerance:

:1:1

dB.

Adjust the OUTPUT VOLTAGE

for

deflection

on type

1008.

Change frequency

100

Deflection on type

1008:19.7

dB.

Tolerance:

:1:

o.2

dB.

Change frequency to 5 Hz.

Deflection on type

1008:

4 dB.

Tolerance:

:1:

2 dB.

1.4.

Noise.

METER

SWITCH:

"Output

Voltage"

SCANNING

SWITCH:

"Off"

FREQUENCY RANGE: "5-Sooo

Hz"

COMPRESSOR

SPEED:

"OfP'

OUTPUT

SWITCH:

"linear"

FREQUENCY

SCALE:

"400

Hz"

METER

SWITCH

"Output

Voltage"

1.5.

Distortion.

METER

SWITCH:

"Output

Voltage"

SCANNING

SWITCH:

"Off"

FREQUENCY RANGE: "5-Sooo Hz"

COMPRESSOR

SPEED:

"Off"

OUTPUT SWITCH:

"linear"

1008.1 -

12.66

Remove V

Place

the

instrument in its

case

screened

effectively

other

way.

Adjust

the

OUTPUT VOLTAGE for a

d~flection

on type

2107.

Meosure Noise: min.

below 10 V.

the

noise level

too high remove tube V 7 and measure the noise

from

the

output amplifier

only:

min. 75

below 10 V.

Possible reason for fault: Defective tube V 8

Adjust the

OUTPUT

VOLTAGE

for

deflection

on type 1008.

Check distortion

different frequencies: max. o.

5o/o

Attention: Bear in mind

that

07 only allows measurements

distortion down

to around o.5o/o without a

filter

type 1607

connected

between type 1008

and

2107 for

rejection

the

fundamental frequency.

Possible reason

for

fault: Defective tube V

7,8

BROEL

KJ.ER

Ncerum

Denmark

Removal

Tuning Capacitor CV 0009.

Oscillator

Valid

from

serial

no.

170230

1008.2

Remove the right hand side cover (when seen

from

the instrument front

plate)

the

capacitor

unit CV 0009.

Set the condenser to fully "turned in" position .

The

posi.tion

the condenser

checked with a

plate

insulating

material,which

strokes over the.stator plates, so

that

none

the rotor plates

above the stator

plates.

The

scale

pointer should naw point

220°.

not,

note carefully dawn the position

the pointer.

Remove

the multi-plugs and unsoldering the two leads to the oscillator coil

assembly. Unscrew the two knobs on the tuning spindle and remove the

scale

rim, pointer and

scale.

The

four screws, which secure

Tuning Capacitor CV 0009 to the front

plate,

can then

unscrewed

Replacing Tuning Capacitor _CV 0009.

After replacing

scale,

center

with reference to the spindle by means

a centering bush. Check

the

position

the condenser

with a

plate

insulating material

for

fully interleaved

capacitor

plates and fix the pointer to 220° or

the position noted

above.

Attention: Item 2.

and 2.

The

frequency

can

only be checked by means

a frequency counter or a frequency standard and an

---

oscilloscope.

The

voltage should

measured by means

a high impedance (law

capacity)

tube voltmeter.

D-r---t--+---+--1_

---4-+-+-+--+-4

C133~~~~~~;;==ril

Output 30 kHz and 35 kHz bottom view

2.1.

Fixed

Oscillator.

FREQUENCY RANGE: "5005-10ooo

Hz"

FREQUENCY

RANGE

to "5-5ooo Hz"

METER

SWITCH: "Output Voltage"

SCANNING

SWITCH:

"Off"

FRfQUENCY RANGE: "5-5000 Hz"

COMPRESSOR

SPEED:

"Off"

OUTPUT

SWITCH:

"Linear"

FREQUENCY

SCALE:

"10Hz"

2.2.

Variable

Oscillator.

METER

SWITCH:

"Output

Voltage"

SCANNING

SWITCH:

"Off"

FREQUENCY RANGE: "5-5ooo Hz"

COMPRESSOR

SPEED:

"Off"

OUTPUT

SWITCH: "Linear"

FREQUENCY

SCALE:

"5Hz"

FREQUENCY

SCALE

"5oooHz"

1008.2 -12.66

Check the signal

the socket

"30kHz

and

35kHz"

(pin 4).

The

frequency should

35kHz.

If necessary adjust the iron core

"C"

in Z 2.

The

voltage should

approx.

2.7

The

frequency should change to

30kHz.

not,

adjust the

air

trimmer "D" in Z 2 and

check

item a

again

Check

that

the frequency

the

"Output"

socket

10Hz

!o,5%.

not,

check

item

2.1.

and

2.2.

Turn

FREQUENCY RANGE

0-5000

Hz.

Check the frequency

the

"Output"

socket:

5Hz

:!:o,5%,

necessary adjust C

133.

Check

that

the frequency on the

"Output"

socket (pin 1)

5 Hz.

not,

adjust the FREQUENCY

SCALE

ADJUSTMENT. Fine adjustment by a

knob and coarse adjustment by a screwdriver operated

capacitor.

case

that

the regulation range is tao far away

set

both

variable

trimmers in

mid position and adjust the

air

trimmer "8" in Z 2

for

Hz.

Check

that

the frequency

5ooo

not,

adjust

the

iron

core

"E" in Z 2 and

check

item a

again.

P12

R92

2.3.

Oscillator

Voltage.

METER

SWITCH:

"Output

Voltage"

SCANNING

SWITCH:

"Off"

FREQUENCY RANGE: "5005-1

Oooo

Hz"

COMPRESSOR SPEED:

"300"

OUTPUT SWITCH:

"Linear"

b . COMPRESSOR

SPEED

"Off"

FREQUENCY RANGE to

"5-Sooo

Hz"

FREQUENCY

SCALE

"Sooo Hz"

c . FREQUENCY RANGE

"5005-10ooo

Hz"

FREQUENCY

SCALE

"5005Hz"

2.4.

Frequency

Drift.

METER

SWITCH: "Power Freq.

Beat"

SCANNING

SWITCH:

"Off"

FREQUENCY RANGE:

"5-Sooo

Hz"

OUTPUT SWITCH:

"Linear"

008.2

12.

bottom

view

Adjust

the

OUTPUT VOLTAGE for an

approx

halfscaledeflection

type

1008.

Adjust

the

iron

core

in Z 3

max.

deflection.

When FREQUENCY RANGE

changed

"5-5000

Hz"

the

deflection

must

change

max . 1

Turn "Phase" (P 12) on the front

plate

min .

deflection

type

1008.

Check

the

voltage

across R

92:320

If necessary

adjust

Check

again

the

voltage

across R

92:

320

mV.

necessary

adjust

Possible reason for

fault:

Defective

tube

V 5

filter

Z 3

capacitor

C «J

Set

the

FREQUENCY

SCALE

exactly

the

mains

frequency

Adjust FREQUENCY

SCALE

ADJUSTMENT until a

very

slow

beat

shows up.

Check

the

frequency

drift

after

period

min.

and

after

hours by

ad-

justment

the

FREQUENCY

SCALE

for a slow

beat

and

read

the

frequency

deviation

the

scale.

Tolerance:±

5Hz

for

each

period.

If necessary

adjust

the

trimmer

"A"

After

adjustment

check

item

2.2.

Attention:

instrument has

not

been

in use

fQ~

l~g

period,

frequency

drift

may

occur

due

humidity in

the

oscillator

circuit.

Therefore

keep

the

instrument

switched

1-2

days

before

any

adjustment.

ROEL

KJ~R

Ncerum

Denmark

Pick-up

Amplifier

Valid

from

serial

no.

170230

1008.3

Sheet 1

Attention:

The

pick-up amplifier can only

checked and adjusted by means

a frequency counter or an oscilloscope and a

fre-

---

quency standard.

The

voltages should be measured by means of a high impedance

{low

capacity)

tube voltmeter.

Check

Pick-up amplifier using

keel.

Gen.

Input"

check this section set the switches as follows:

METER

SWITCH:

"Vibration Level"

SCANNING

SWITCH:

"Off"

COMPRESSOR

SWITCH:

"Off"

OUTPUT

SWITCH:

"Linear"

Switches not mentioned here

are

set in a position according to instructions.

3.1.

frequency Response.

FUNCTION

SELECTOR:

"Accel."

ACCELERATION

RANGE: "1"

{Acc.Gen.)

FREQUENCY

RANGE: "5-5ooo

Hz"

FREQUENCY

SCALE:

"500Hz"

FREQUENCY

RANGE

to "5005-lOooo Hz"

3.2.

Sensitivity

Displacement.

FUNCTION

SELECTOR:

"Displ."

DISPL.-VEL.RANGE:

"o.Ol"

(Acc.Gen.)

FREQUENCY RANGE:

"So.5ooo

Hz"

FREQUENCY

SCALE:

"500 Hz"

FREQUENCY

SCALE

"looa

Hz"

DISPL-VEL.RANGE to "1" (Ace

.Gen.)

FREQUENCY

SCALE

to "5Hz"

1008.3

12.66

Adjust

OUTPUT

VOLTAGE

for

an 18

deflection on type 1008.

Change the frequency

from

10-5ooo Hz.

Deflection on type 1008: 18 dB.

Tolerance:±

o.S

dB.

Check and tolerance as under item

Adjust

OUTPUT

VOLTAGE

for

an input voltage of

exactly

904 mV.

Deflection on type

1008:20

dB.

Tolerance:

o .2 dB.

necessary adjust P 10

"Dispi/A

.G ."

voltage

V 1

1:7,8

2:30

6:700

Deflection

type

1008:8

dB.

Tolerance:±

o.2

dB.

Adjust

OUTPUT

VOLTAGE

for an input voltage of

exactly

9.04

mV.

Deflection on type

1008:19.7

dB.

necessary adjust P4 (located on printed

circuit

0126)

Possible reason for fault: Defective capacitor C

29,

The

sensitivity adjustment

P 10 can be

set

1.5%

higher or latter

facili-

ties the adjustment

3.3.

Sensitivity

Yeloci!y.

FUNCTION

SELECTOR:

"Vel."

DISPL.-VEL.RANGE:

"o.l"

(Acc.Gen.)

FREQUENCY RANGE: "5-Sooo Hz"

FREQUENCY

SCALE:

"500Hz"

FREQUENCY

SCALE

"1oooHz"

3.4.

Sensitivity

Acceleration.

FUNCTION

SELECTOR:

"Accel."

ACCELERATION RANGE: "1"

(Accei.Gen

FREQUENCY RANGE:

"5-5ooo

HZ"

FREQUENCY

SCALE:

"500Hz"

3.5.

Check

Acceleration Range.

Adjust OUTPUT VOLTAGE for on input

voltage

exactly

57.6

mY.

Deflection on type

1008:20

dB.

Tolerance:±

o.2

dB.

necessary adjust P 9

"Vei./A.G."

voltage

7,8

2:30

pin 6: 700

Deflection on type 1008:

dB.

Tolerance:±

o.2

dB.

Adjust OUTPUT VOLTAGE for an input

voltage

exactly

7.07

mY.

Deflection on type

1008:20

dB.

Tolerance:±

o.2

dB.

If necessary adjust P 13

"Accei./A.G."

voltage

on V 1 pin

190

2:7

pin 6: 165

FUNCTION

SELECTOR:

"Accel . " Adjust OUTPUT VOLTAGE to 20

deflection

on type

1008.

ACCELERATION RANGE: "1"

(Accei.Gen.)

FREQUENCY RANGE: "5-Sooo Hz"

FREQUENCY

SCALE:

"500 H.

ACCELERATION RANGE to

"lO"(Accei.Gen.)

Deflection on type

1008:0

dB.

Tolerance:±

o.4

dB.

Adjust OUTPUT VOLTAGE to 20

deflection

on type

1008.

ACCELERATION RANGE to"1 OO"{Accei.Gen.) Deflection on type 1008: 0

Tolerance:±

o.4

dB.

Adjust

OUTPUT

VOLTAGE to

deflection

on type

1008.

AC..:ELERATION

RANGEto"1ooo"~cei.Gen.)

Deflection on type

1008:0

Tolerance:±

o.4

dB.

Check a Iso "Acceleration Range•

10 .

kHz.

3.6.

Check

Dispi·

.-Vei.Range.

FUNCTION

SELECTOR:

"Displ."

Adjust OUTPUT VOLTAGE to

deflection

on type

loOe.

DISPL.-VEL.RANGE:

"o.Ol"

(Accei.Gen

FREQUENCY RANGE: "5-Sooo

Hz"

FREQUENCY

SCALE:

"55 Hz"

DISPL.-VEL.RANGE to "o.1

"(Accei.Gen.)

Deflection on type

1008:0

dB.

c . DISPL.-VEL.RANGE to

"1"

(Accei.Gen.)

Tolerance:±

o.4

dB.

Adjust OUTPUT VOLTAGE to

deflection

on type

1008,

Deflection on type

1008:0

dB.

Tolerance:±

o.4

dB.

Adjust OUTPUT VOLTAGE to 20

deflection

on type

1008.

DISPL.-VEL.RANGE to "10"

(Accei.Gen.)

Deflection on type

1008:0

dB.

Tolerance:±

dB.

FREQUENCY

SCALE

"500Hz"

Check

and

tolerances as under item

FUNCTION

SELECTOR

"Vel."

1008.3

12.66

BROEL

KJ.ER

Ncerum

Denmark

Pick-up

Amplifier

1008.3

right side view

3.7.

Relay Functions.

b. FUNCTION

SELECTOR:

"Ace."

FUNCTION

SELECTOR

to "Auto D-A"

Check

Pick-up amplifier using

"vel.

Gen.

Input"

Frequency Response.

FUNCTION

SELECTOR:

"Vel ."

DISPL.-VEL-RANGE:

"o.01"

(Vei.Gen.)

VEL.GEN.RESPONSE: "Flat"

FREQUENCY

RANGE: "5-5ooo Hz"

FREQUENCY

SCALE:

"500Hz"

1008.3

12.66

Valid

from

serial

no.

170230 Sheet 2

013

top view

Check by moving the frequency pointer that the relays 0

5-6-7

are

energized

according to the following

table.

Frequency scale:

Relay:

Tolerance:±

10%

100

05-06

300Hz

05-06-07

necessary loosen rotating

contact

of switch 0

(located on the tuning

spin,_

del

CV 0009} and adjust the switching point according to table.

Relays 0 2-'-3-4 should

energize.

Relays 0

2-3

and 0 13 should energize according to position of frequency

scale and cross over switch.

Adjust the

OUTPUT

VOLTAGE

for

a 15

deflection on type 1008.

Change the frequency

from

5-2ooo

Deflection

type 1008: 15 dB.

Tolerance: t

o.2

dB.

VEL.GEN.RESPONSE to "Shaped"

FREQUENCY

SCALE

"10Hz"

Frequency

scale

Deflection on type 1008

Frequency

scale

Deflection on type 1008

700

12.58

Adjust

the

OUTPUT VOLTAGE for a

deflection

on type

1008.

Change the frequency

from

10-2ooo

and

check

the

deflection

on type

1008.

100 200 300

400

500

600

10.26 10.83 11.24

11.63

12.30

800

900

1000 '

1250 1500 2000

12.92 13.15 13.52 14.16

14.80

16.19

Tolerance, for frequencies

10-1000

Hz:±

o,3

1250-2000

Hz:!

o,5

3.9.

Sensitivity

Velocity·

FUNCTION

SELECTOR:

"Vel."

DISPL.-VEL.RANGE:

"o.01"

(Vei.Gen.)

VEL.GEN.RESPONSE:

"Flat"

FREQUENCY RANGE: "5-Sooo Hz"

FREQUENCY

SCALE:

"500

Hz"

3.10.Sensitivity

Displacement.

FUNCTION

SELECTOR:

"Displ •

DISPL.-VEL.RANGE:

"o.01"

(Vei.Gen

VEL.GEN.'RESPONSE:

"Flat"

FREQUENCY RANGE: "5-Sooo Hz"

FREQUENCY

SCALE:

"500 Hz"

FREQUENCY

SCALE

"1oooHz"

3.11.

Sensitivity

Acceleration.

FUNCTION

SELECTOR:

"Accel."

VEL.GEN.RESPONSE:

"Flat"

ACCELERATION RANGE:

"1"

(Vei.Gen.)

FREQUENCY RANGE: "5-Sooo Hz"

FREQUENCY

SCALE:

"500Hz"

FREQUENCY

SCALE

"250Hz"

1008.3 -12.66

Adjust OUTPUT VOLTAGE for an input

voltage

exactly

6.8

Deflection on type

1008:20

dB.

Tolerance:±

o.2

dB.

If necessary adjust P 6

"Vei./V.

G."

voltage

on V 1 pin

450

2:1,8

6:45

Adjust

the

OUTPUT VOLTAGE for

input

voltage

exactly

1.07

Deflection on type-1 008:

dB.

Tolerance:±

o .2

If necessary adjust P 8

"Dispi./V

.G."

After adjustment

P 8

check

item 3.11

voltage

on V 1 pin

1:7,6

2:28

680

Deflection on type

1008:14

dB.

Tolerance:±

a.2

dB.

Adjust

the

OUTPUT VOLTAGE

for

an input

voltage

exactly

8.36

mY.

Deflection on type 1008:

dB.

Tolerance:±

o.2

dB.

If necessary adjust P 7

"Accei./V.

G."

After adjustment

P 7

check

Item

3.10

voltage

on V1 pin

1:340mV

2:3,5

6:29

mil

Deflection on type

1008:14

dB.

Tolerance:±

o.2

dB.

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