B&K 1621 Instruction Manual

Instruction

Manual

Tunable Band Pass Filter Type

TuMble B•mt

Overload

Pua

Fiher

Power

T~

1821

Filter

1621

-20t

Hl

A small
lectable
octave), covering
0,2
able
nal batteries
Suited
ters
B & K
B
Can be
cally by,
Portable Graphic Level Recorders Type
2306
one

Hz

& K

of

light-weight
bandwidths

to

20kHz

tuned

frequency. Powered

or

an external

for

use

Types

Vibration
Wow

and

the

with

2203,

and

manually

and

synchronously

2309

above

portable

of

the

with a continuously

B & K Sound Level

2209.

Meter

Flutter

tuned.

for

recording spectra from

instruments.

filter

3%

and

frequency range

DC

voltage.

2210

Type

2511.

Meter

Type

or

tuned

with,

with

23%

from

and

2218.

and the

6203.
automati­the

se-

(third

vari-

inter-

Me-

B & K

033-0119

+ BrUel & Kjaer

TUNABLE

BAND

PASS

FILTER

Applicable

to

instruments

TYPE

with

1621

serial

numbers

from

6941

24

Revision

September

1981

1.

INTRODUCTION

2.

CONTROLS

AND

. . . .. .. ...

SPECIFICATION

..

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

CONTENTS

(PRODUCT

.........

DATA)

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

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

..

..

.. ..

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

.. ..

. . . . . . . . 3

.

3.

OPERATION

4.

MEASUREMENT

2.1 .

2.2

FRONT PANEL .. . . ..

. REAR PANEL ...... .... .........

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

3.1 .

3.2

3.3.

3.

MOUNTING

. POWER SUPPLIES

Internal
Mains
Mains
Mains
External
MANUAL

4.

AUTOMATIC
TYPES

.. . .

battery
battery
power
power

DC

supply

OPERATION WITH

OPERATION WITH LEVEL RECORDERS

2306

CONSIDERATION

4.1 . FREQUENCY CHARACTERISTICS

4.2

. PHASE CHARACTERISTICS

4.3.

FILTER SWEEP RATE CONSIDERATIONS

Selection
Choosing

of
the

DC

.. ..

...... .

....

.. ...

.......

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

.. .. .. ..

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

AND

THEIR USE

supply

charger

supply and

supply

AND

..

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

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

battery

Type

2805

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

SOUND

2309 ..............................................

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

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

or

AC recording

meter

and recorder settings

..

.....

..

..

. .

..

....

....... ..

.....

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

.. .. ...

...

..

....

..

..

... .......

.. .

..

.....

.. .... ..

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

..

.......

..

..

..

.. .. .... ...

.......

charger Type

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

......

LEVEL

..

...

.. .. .. ..

..

...

.......

.. ..

.....

..

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

ZG

0199

AND

VIBRATION METER

.. . .. ..

..

.. .. ..

... .... ...

..... . ....

..

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

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

...........

......

..

..

..

. . . . 9

..

. . . . .

ETC

.....

...........

.. 7

.

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

.......

......

......

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

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

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

......

.. ..

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

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

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

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

.......

3
4

. 7

10
11

12

15

15
16

16
16

17

5.

SERVICE

AND

REPAIR ........................................................................................................

20

type 1 621

FEATURES:

•

Tunable

band

frequency

•

Frequency
20kHz

•

Selectable
or

•

Two
voltage

•

Manual

in 5 sub-ranges

23% ( 1/3

alternative

ranges

tuning
automatically
Recorders

•

Internal
DC

•

Small
for

battery

power

size and

ready

USES:

portable

• In
narrow

band
analysis
the

General

Vibration

• In

portable

narrow

band
analysis
vibration

Level

Meters

2210and

• Recording
spectrograms
the

above

the

Portable

Recorders

The

Tunable
Type 1
band
an
Kjrer
which

narrow

is
the
ter
quency
with

2209,

621

pass

filter

external

measuring
it

gives

band

particularly

General

2511

the

for

analysis

Sound

221 0 and

is a variable

pass

range

bandwidths

Oct.)

input

or

from

2306

and

or

supply

light

portability

systems

frequency

of

vibration

Purpose

Meter

2511

systems

frequency

of

sound

with

the

2203, 2209,

2218

frequency

with

instruments

Level

2306

filter

the

frequency

suited

Purpose

or

Band

intended

with
instruments,

ability

for

Vibration

narrow

of

vibration,

Level

Meters

2218

0,2

Hz

tuned

Level

2309

external

weight

for

with

for

and

Sound

one

2309

Pass

frequency

for

use as

Bruel

to

perform

analysis.

use

band

for

narrow

to

3%

of

plus

Filter

and

with

Me-

fre­and

2203

band

frequency

and

vibration.

battery

1

621

for

applications

power

Description

The 1 621
single
switchable

power

control

The
ter

bandwidth

"3%"

the

bandwidths· between

power

the

peak.

to

"Linear"
the

filter

It

Five
ranges
strument's
between
sub-range
magnitude.
swept

Overload

,

power

the

ideal

sources.

consists

pole

butterworth

bandwidths,

supply,

circuits.

FILTER

or

to

points,

The

position,

.

contiguous

can be

overall

0,2

Hz

covering

The

manually

Manual
Auto

Start

analysis

Its

light

supply

portable

away

and

selector

to

be

"23%",

i. e . 3 dB

selector

that

frequency

selected

frequency

and

frequency

through

Tunable

Tunable Band Pass

Frequency Tuning •

e

••

of

sound

weight

make
instrument

from

of a tunable

the

allows

switched

which

down

also

from

20kHz,

one

and

the

fixed

filter

with

its

own

necessary

the

fil-

are

the

half

from

has a

by-passes

sub-

the

in-

range

each

order

may

the

sub-

to

of

be

Band Pass

Filter

Type

1621

Power

On

12

Frequency Range

14

range
ing an
a scale
quency,
quencies
to

ISO R

Alternatively,

be

tuned

table

2309

by a
tions).
which

Fig

20-200

2 -

2~

0,2 - 2

•

Briiei&Kjaar

by a large

attached

showing

and

the

of

266

automatically

Level Recorders

when

they

suitable

The

controls

.1 .

Rear

Filter

-

•

preferred
1/ 3 octaves
.

the

cable

required

Medel

2k

-2

Hz

control

pointer

the

filter

Filter 1

from

are

interconnected

(see

paper speed,

the

sweep

In

Oenmartc:

-

view

of

the

Type

Filter

0k

knob

that

sweeps
centre
centre

according

621

the

2306

specifica-

rate,

Fihtr!~UI

1621

hav-

fre-

fre-

may

Por-

or

is

138-81

set

on

the
sweep
The

filter

is

initiated

is

then
plete decade
the

recording
0124,
21
process,
does
relevant.

1
manually,
swept

00

621

QP

and

the 1 621

not

move,

After

frequency

and

.

QP

Alternative
can be
switch. "1
level
delivers
erating
should
the 2 511
or
ters.
these

The 1
ternal
DC
plied
25

chosen

V RM

that

the

to

external

in

RMS

be

operates

for

use

with

An

"Overload"

ranges

621

batteries

supply. The

with

the

to

30

hours

rechargeable

level

recorder,

from

the 1 621

advanced

synchronously

paper (QP 01

0143,

21

QP

20).

0224,

During

tuning

its

position

one

decade,

range

another

input

S"

Vibration

voltage

by a

matches

is

decade is

rear

Meter 2 51

filters

mode. "0,2 V RMS"

selected

for

use

in Peak

the

Sound

lamp

are exceeded .

is

powered

or

instrument

by

alkaline

by

al"l

cells

give

continuous,

NiCd

cells

will

and

one

com-

with

20,

this

knob

being

changed

ranges

panel

the

when

when

mode,

Level

Me-

lights

either

external

sup­about
while

give

the

OP
QP

ir-

the

1 V

op-

in-

1 6

to

20

tion.

.

A

power
plies can be

or
be obtained
ZG

or

or

hours

DC

voltage

1621

to

the

alternatively ±

0133, a Power

a car

ZG

0199

of

continuous

can be applied

recharge batteries,

instrument.

between

14

from a Battery

battery.

When

is used
can be operated and
charged (at a reduced rate
ZG 0

113)

simultaneously.

1

if

and/

External

+4

and +

V DC,

which

Charger

Supply

Fig.2. Portable

the

the

the

ZG
ZG 0

instrument

batteries

opera-

to

the

or

to

sup-

15

V,

can

0199

113

re-

with

Vibration

Portable

The
table
shown
tion
1621
foam
2000
1 9
included

Vibration

comp.Jetely

Vibration

in Fig. 2,

Meter

installed
plastic
that

inch

in
accessories
cables
NiCd
Charger

Analyzer

AO

cells

ZG

Type

Analyzer

self-contained

Analyzer

consists

2511A

in a

Carrying

can

contain 1 2/1 2 of

rack

module. Other

addition

are

two

0133,

QB

six

0008

011 3 for

3513

Type

351

of a Vibra-

and a

rugged

Filter

hard-

Case

items

to

the

standard

connection

rechargeable

and a Battery

the

1621

.

Por-

3,

KA

a

Frequency

Pass

Attenuation
frequency:

Dynamic

Accuracy

Input:

Input

Output:

Range:

0,2

Hz

to

20kHz

bandwidth:

Switchable

at

Switchable

Range

>

40

dB

0,

35

dB

6kHz

40dB

0,

of

1,5%

at 25°C,

°C

socket

1 V

RMS

impedance:

input:

socket

Impedance:

RMS

2Hz

RMS

RMS
2Hz

indicated

with

tween

>

tween

>

tween

±

per

BNC

0,2 V RMS

1 V

10pF
0,2 V input:
with 1 OpF

BNC
Impedance: < 0,5
100pF
load

in 5

3%

or

23%

1/ 2

and 2 times

34

dB

or

:

with

and

6kHz

with

and

20kHz

with

and

20kHz

with

crest

with

crest

approx. 1

approx .

;;.

sub-ranges

( 1/ 3

1 6 dB

3%

bandwidth

3%

bandwidth

23%

bandwidth

frequency:

additional

factor

5

factor

MO

200

0 in

25

kO

oct

5

in

series

kO in

series

.)

selected

± 0 ,

series

with

Specifications 1 621

Gain

at

se

ected

be-

be-

be-

04

with

%

0

dB± 1 ,0

Hum

and

noise:

Max .

Volt

-

0.2

Hz - 6 k

age

v

1

0.

Distortion

Environmental

Power

External

Internal

10mV

2mV

2V

:

< 1%

The

instrument

tions

under

Operating

+

50°C ( 14°
Humidity: 0 to
non

condensing
Electromagnetic:
100A

/ m

Consumption:

Typically

power

+ 4 V to + 1 5 V,

power

6 x 1,5 V

frequency

dB

3%

Hz

conditions

the

temperature:

to

200

mA

supply

supply:

cells

6kHz-20kHz

18mV

3.

6mV

:
performs
following

122°F)

90%

Field

at

8 V

:

or

± 1 4 V,

(IEC

TypeR

:

within
conditions

relative

strengths

approx

20)

0 .2 Hz -

10mV

specifica -

- 1

0°

humidity

. 2 W

23

2

mV

up to

%

20kHz

to

,

Battery

life

25

to

with

alkaline

1 6 to

with

NiCd
Charging
ies

approx. 14

Dimensions:

Height:
Width:
Depth:
(B

& K

of 1 9"

Weight:

2,2

kg (4,91b)

Accessories

6

Batteries

7

-pin

DIN

8-pin

DIN

2 BNC

Accessories

Synchronization

2309
AQ
718058
AQ
718058
Rechargeable
Battery
Power

:

30

20

time

132,6

139,5

200

module

rack

included

plug
plug

plugs

Available

:

0034

0182

Charger

Supply

hours

batteries

hours

cells

mm

mm

mm

module)

with

QB

JP

for

and

for

for

for

fully

hours,

(5,2

(5,5

(7,9

cabinet

:

0004

JP

0703

JP

0802

0035

:

cable

2306

2309

2306

NiCd

ZG

ZG

0199

continuous

(supplied)

continuous

discharged

12 V 400

in)

in)

in)

KK

batteries

for

from

before

cells

QB

011

3

operation

operation

mA

0024

2306

serial no.

serial no.

0008

batter

, 4/

-

12

and

2.1.

FRONT

PANEL

2.

CONTROLS

Overload Indicator

Frequency

Tuning

Sweep

Knob

Control

--:---JII.,

--~-

Fig.2.1. Front

POWER ON INDICATOR:

Overload

.

Sweep

Control

Frequency Tuning

Panel

This

lamp

ment,

Tunable Band

of

the

lights

from

internal

Pass

Filter Type

Power

·-----------:1---

On

Tunable

when

and

1621

14

0

,2-2

Brilel &

Band

there

external

Filter Power On

1----e

fJ811'""'cy Range

20-200

2-

2~

•

;oo

- 2k

•

,-----c---

K;.t

Pass

Filter

Type

is a

sufficient

power

supplies.

--

1621

voltage

Indicator

Filter

Selector

Frequency
Range Selector

supply

to

the

instru-

FILTER SELECTOR:

Note:

DC

A
for

It does

source

4-position

selecting

able.

In

the

"Off"

transmitted

In

the

"Linear"

signal

23%

ter;

filter

the

is also

filtered

not

.

rotary
the

required

pos1t1on,

to

the

FILTER OUTPUT socket .

position,

applied

bandwidth

signal

light

when

switch

the

to
is selected,
is

instantly

the

for

switching

filters.

power

the

output

the

instrument

"Linear",

is

off,

23%

bandwidth

there

available.

the

but

signal

is

is

powered

instrument

"23%",

the

input

is

unfiltered,

filter.

no

"settling

and

from

on

"3%"

signal

but

Thus,

time"

and

is

when

for

a ±

off,

are

directly

the

the

14

and

avail-

input

the

fil-

V

3