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

FREQUENCY RANGE
SELECTOR:

FREQUENCY

TUNING

KNOB:

A

5-position

analysis.

for

selection
scales
give

A
ed

the

shows
the
lower
circular
frequencies

The
CONTROL

on

the

actual

continuously

by

the

centre

the

scale

scale

marks

FREQUENCY

rotary

Two

scales

and

the

FREQUENCY

variable

FREQUENCY RANGE SELECTOR.

frequency
RPM

values

of

the

in

of

the

switch

switch

are

the

lower

frequency

of

value.

To

should

FREQUENCY RANGE SELECTOR.

between the

1 I 3

TUNING

is

set

for

shown,

scale

TUNING

or

RPM

tuner

covering a range

the

band

obtain

be

multiplied

scales

octave

to

bands

KNOB
Auto.

selecting

the

upper

giving

KNOB

value.

being

the

actual

by

indicate

according

has

no

the

scale

the

should

of

The

swept

frequency

the

effect

decade

giving

factor

be

one
outer

and

factors

the

to

when

required

the

decade

by

which

multiplied

decade

the

or

given
The
prefered

ISO R 266.

scale

inner

RPM

small

the

select-

shows

on

centre

SWEEP

for

the

to

scale
value

the

black

OVERLOAD INDICATOR:

SWEEP CONTROL:

SWEEP CONTROL INDICATOR:

This

lamp

lights

INPUT

TOR

A

with

"Manual":
FREQUENCY TUNING KNOB.

"Auto":

the

cable connects
0,2

"Start":

turning

table Level Recorder Type
vant
sweep
plete decade (selected by

then

ING KNOB is

This

by
cade,

socket; depends on

on

the

3-position

positions as

In

Portable Level Recorder· Type

Hz (or a decade

When

position and released (so

cable connects

the

stop.

lamp

lights

the

Portable Level Recorder Type

when

whenever

rear panel.

paddle

follows:

In

this

this

central

the

the

filter

synchronously

During

the

this

irrelevant,

when

sweep

switch

upper

multiple

position,

position

two

instruments.

switch

the 1 621

process,

and

the

stops,

too large a voltage is applied

the

setting

to

select

thereof)

is depressed

2306

with

the

it

does

filter

the

of

the

VOLTAGE RANGE SELEC-

the

method

the

filter

is

tuned

the

filter

is

tuned

2306

and

that

or

and

the

the

FREQUENCY RANGE SELECTOR) and

the

position

not

is

actually

lamp goes

or

2309

The

sweep

will

to

this

it

comes back

2309

2306

will

appropriate recorder and

recording paper over one

move.

being
or
out.

will

sweep

spring-loaded
start,

of

the

swept

2309.

to

of

tuning

manually

automatically

when a suitable

always

one decade.

to

"Auto"),

when

FREQUENCY TUN-

synchronously

At

the

the

the

the

end

FILTER

filter,

by

from

start

self

the

Por-

rele-

com-

of

the

at

re-

will

de-

THUMBWHEEL:

2.2.

REAR '

FILTER

FILTER

PANEL

INPUT:

OUTPUT:

4

The

knurled

the

baseplate

carrying

A BNC socket

A BNC socket

case.

knob at

to

enable

Turn

for

feeding

for

feeding

the

bottom

the 1 621

it

anticlockwise

the

signal

the

filtered

centre

to

be

to

release,

into

signal

of

the

mounted

the

instrument.

out

front

panel is

in

a rack or portable

clockwise

of

the

instrument.

to

tighten.

to

release

In

put

Voltage

Se

lector

Power Selector

Battery Cover
Release Screw

Extern al
Power Supp

ly

F i Iter Out put

Groun

ding Point

Fig.2

.2.

POWER SELECTOR:

INPUT VOLTAGE SELECTOR:

EXTERNAL POWER SUPPLY:

Rear

Panel

A
ply.

A
"0,2 V RMS"

A
for
pin

&

WARNING!

dry

of

the

2-position

2-position

7-pin

DIN socket
powering
connections

cells:

there

Tunable

slide

slide

and "1 V

the

Band

switch

switch

RMS"

for

instrument

are

shown

Pass

Filter

Type

for

selecting

for

selecting

internal

the

are available.

accepting an external

and

for

recharging

in

Fig.2.3.

See also section

1621

Never apply a charge voltage to

is a

danger

of

explosion.

Filter Input

Synchronization

or

external

maximum

DC

power

its

internal

alkaline

power

input

voltage.

supply voltage

cells. The

3.2

.

or

conventional

sup-

External Power

Charge

Input

+ 15 V

DC

Fig.2.3.

Pin

Connections

view

---+-------

Dual Polari
External Power
Drive

of

ty

Input

EXT. POWER SUPPLY Socket.

-

External Power

--Drive

+ 4 to+ 15 V

Input

DC

79077

4

External

5

SYNCHRONIZATION:

BATIERY COVER RELEASE
SCREW:

An

8-pin

DIN socket
Portable Level Recorder Type
cording paper. For
and

This
oved

operation

retained

for

, see section

screw

battery

to

enable

details

replacement.

of

3.4.

enables

the

filter

2306

or

2309

connections,

the

top plate

frequency

synchronously

synchronization,

of

the

to

be

instrument

swept

with

sweep

to

be

by

its

the

re-

rate,

rem-

6

3.1.

MOUNTING

3.

OPERATION

3.2.

3.2.1.

The 1 621
front

may

For easy

KA

Type

POWER

SUPPLIES

There

small
also

be
whether
whether

The

various

AND

are

lightweight

Internal Battery Supply

Six

1,5 V alkaline

battery

1,5V

standard

approximately 6 to 8 hours.

can

be used

be

raised

transportation

2000,

capable

THEIR

several

driven-from

it

has

to

it

has

to

possibilities

life

of

25

dry

free

using

the 1 621

of

USE

methods

portable

an

external

be

capable

power

are

dry

cells

to

30

cells

may

standing

the

metal

carrying

of

supplying

Filter

of

other

instruments

outlined

(conforming

hours

continuous

also be

on

stand

can

be

three

which
power

recharging

in

the

to

used,

its

four

attached

fitted

instruments

power

is

powered

supply.

following

IEC R

into a hard

to

The

the

in

the

20)

operation

these

however,

feet

or,

to

enable

to

the

underside

the

size

the 1 621. Although

by

its

own

choice

internal

measurement

sections.

are

supplied

(8

& K

of
cells

stock

will

foam

of

the

internal

power

chain

only

of

plastic

of

with

No. QB

better

1621.

supply

the

have a battery

the

instrument

carrying

it

is

batteries,

Filter,

at

the

the

1621,

0004).

viewing,

primarily

depends

and

same

the

.

case

it

may

also

time.

with

Other
life

a

on

a

of

Fig.3.1.

Position

of

Cells

in

Battery

Compartment

of

150516

1621

7

The 1

621

may
Stock No. QB
SAFT VOLTA BLOCK Type

hours

amp.

however). SAFT,
minimum
ment

is indicated by
on charge
tinuous

&

WARNING!

with
battery,
cause

operation.

poles reversed:

or

internal

0008),

respectively.

of

500

for

14

Never

batteries

reversal

also be

which

the

cell

charge

the

hours

attempt

there

that

powered

VR

(Any

manufacturers

cycles before

cells

or

is a

have been used in

of

battery

using

can be supplied as accessories. The cells

40

rechargeable cell

failing

more. The

to

recharge

danger

polarity.

six rechargeable

which

have a voltage and charge

specify

replacement

to

reach a

battery

alkaline

of

explosion.

fully

life

other

with

equivalent

that

with
is necessary. The need
charged

will

be

between

or

conventional

Similarly

instruments

nickel-cadmium

recommended

rating

ratings

normal

use

condition

16

dry

never

mix

or

battery

ar:'ld

batteries

of

1,2

may

the

cells have a

for

after

having

20

hours

cells ·or

different

packs.

(B

& K

are

V and 4

be used,

replace-

been

con-

batteries

types

of

This

can

3.2.2.

Battery

The cells

1. Loosen
strument

2. Place

3. Replace

4.

Select

1621.

5. Select
lamp

6.

Switch

7. Label

standard
RISK

Charger

A

Battery

recharging
charged
the

EXTERNAL POWER SUPPLY socket

for

the

may

the

the

"Internal

"Linear"

is

lit

the 1 621

the

- NOT TO

ZG

0113

Charger

the

cells. The

different

be

fitted

battery

off

towards

cells in

the

to

instrument,

dry

the

top panel.

Battery"

with· the

ensure

off

cells have been

BE

ZG

cells QB

charger

mains

as

follows:

cover release

the

rear. (The

compartments

witt"l

FILTER SELECTOR, and check

the

batteries have

after

the

battery

stating

RECHARGED".

0113

0008,

is

voltages is:

which

(Fig.3.2)

the

merely

screw

the

fitted,

recharge

(see

Fig.2.2)

screw

is available as an ·accessory

plugged

is captive, so

with

the

polarities

POWER SELECTOR

sufficient

check.

type

of

cells have been

then

also

time

into

of

the 1 621

and .slide

it

indicated. (See Fig.3.1

power.

include

being approx.

the

mains

. Colour coding

the

cannot

switch

the

be lost).

on

that

POWER INDICATOR

installed.

warning

on

14

hours

supply, and

of

top plate

the

rear

If

"EXPLOSION

separate

for

connected

the

connections

of

the

).

of

alkaline

order
fully

in-

the

or

for

dis-

to

8

Blue

Black

Brown

&

WARNING!

The
the

0 V (Neutral)
100­200 -240

charger

cells. In

130V

Clip back and

may also be used

this

AC

V AC

situation,

insulate

however,

to

the

line

power

the

not

the

instrument

battery

in

use.

recharge

at

time

the

will

same

be

time

longer.

as

recharging

ffi

WARNING!

are

Never

fitted: There

apply a charging

is a

danger

Fig

.3.2.

of

ZG

voltage

explosion.

0113

Battery

to

the

Charger

1621

when

non-rechargeable

cells

3.2.3.

Mains

Power

The

Supply

Power
a charging
front

panel. One
Meter,
ZG

0199.
SUPPLY
(available as an

of

its

pins are
powering
the

total
power
power

supply.

supply
measuring small
connected

Power Suppl y

ZG 0199

Output S

ocket

and

Supply

voltage

and a

The

socket

the

other

combined

from

+7,5 V DC

Battery

Type

Charger

ZG

0199

of + 12 V DC

instrument

2306 I 2309

output

accessory

of

socket

the

1621

on serarate order) is suitable

connected 1 to

instruments

drive

current

With

such a

and

the

vibration

the

plug

set-up,

sreening

levels, and in

at

ov

Type

ZG

is

capable

simultaneously

may

be charged while

Level Recorder)

of

the ZG

with

the

1, 2

to

2 etc.; there is

from

a ZG

does

not

however, a ground

of

the signal cables.

this

one end

+12 V DC

of

each

Ch

arge

+12 V DC

0199

of

providing a driving

or

separately,

three

may

be

0199

is

connected

connections

no

0199,

consult

exceed 1

case

it

of

,25

is

recommended

the signal cables.

ov

(e.g. a

powered

shown

for

this

need

their

A,

loop

is

This

Driv

e

+7,5 V DC

voltage

controlled

1621, a 2511

simultaneously

to

the

in

Fig.3.3.

connection

to

disconnect

Instruction

the

ZG

formed

may

prove

that

1621

External Power

Supply Socke

of + 7,5 V DC
by a switch

Vibration

from

EXTERNAL POWER

Cable

even

though

pins 4

AQ

to

Manuals. Provided

0199

by

is a

the

very

0 V line

troublesome

the

screening be

t

and

on its

the

0035

all 7

7.

For

useful
of

the

when

dis-

3.2.4.

Mains

Fig. 3. 3.

Power

The

+28
ering
iently
NAL
NEL 1
channel

Connections

nal

batteries

side

of

Supply

Power

V DC

Type

Supply

or

±14 V DC. When

the 1 621,

high.

Connection

2805

but

POWER SUPPLY

switch

2 is

on

used,

JP

plugs

Type

not

the

then

0703

for

of,

shown

of

socket

front

external

1621. External

2805

contains

either

for

charging

the

Bulgin

on

the

of

the

2805

pins

4,

5, 6

power

two

channel

the
socket on

1621

is set

of

the

JP

to,

and

view

channels,

is

internal

the

is

shown

to

2805

0703

for

recharging

of

sockets,

switched

cells

rear

in

"±14

V",

socket

each

to

as

its

panel

Fig.

i.e.

should

750449

inter-

soldering

of

which

±14 V it

current

of

the

3.4.

Ensure

the

switch

be

/ 1

can

is

suitable

rating

2805

used

supply

is

to

the

that

the

should

instead

either

for

pow-

not

suffic-

EXTER-

CHAN-

be up. (If

of

pins

9

2805

Output

Socket

Fig.3.4.

3,

2,

ment

Any

other

i.e.

-14V,

JP 4705

Connections
External

1 respectively,

may

be

powered

±14 V DC

OV and

view

and

from

source

+14'1

from

the

2805

of

sockets,

the

CHANNEL 2 switch

each

channel.

should

DC.

All

three

to

the

soldering

be

connected

pins

1621

side

must

for

of

plugs

should

to

the

be

connected.

JP

0703

power

shown

be

set

same

750448

supply.

to

"±14

three

V".)

pins

One

on

the 1 621,

instru-

3.2.5.

External

Note:

a

DC

A

more,
NAL

The

POWER ON INDICATOR does

±14

V DC source.

Supply, 4 to

car

battery,

may

15

or

be used

POWER SUPPLY socket on

4

to

15 V

DC

Fig.3.5. Connections

External

V

other

to

view

DC

power

for

of

source

the 1 621.

its

external

socket,

not

of

between

The

rear

panel as

ov

JP 0703

DC

source

soldering

light

4 V and

source

shown

connection

side

when

is

+4

+15 V DC

of

plug

the

instrument

15 V with a capacity

applied

to

in

Fig.3.5.

to

the

1621

1621

External Power

Supply Socket

750446

to

1621.

shown

/1

is

powered

via

of

the

from

2 W

or

EXTER-

10

If

recharging
system,
the
tably
This
will
battery,
the
should

For
source

shown

and

car's

chassis and bodywork. The

isolated

is

important

have a potential

and

car

chassis/body.

be

disconnected

simultaneous

may

in

Fig.3.6.

or

powering

the

car's

from

the

battery

be

connected

own

the

car, since

since

the

1 2 V

If

from

powering

If

charging

of

the 1 621

battery

metal case

below

could be

it

is

impossible

the

of

the 1 621

to

the

only

is

carried

is

being

used,

rest

of

the

the

signal

of

the 1 621

that

of

the

short-circuited

to

isolate

car's

chassis.

and

out

in a car

then

the

instrumentation

cables

are

and

car

chassis/body

if

the

instruments

the

instruments

charging

that

1621

chain

connected

of

other

when

of

its

internal

EXTERNAL POWER SUPPLY socket

is

required

then

pin 1 need

not

has a positive -earth

should

connected

be

be

isolated

should

also be

to a common

instruments

connected

are

allowed

effectively

cells,

of

the i 621

the

a 1 5 V DC

connected.

ground.

to

to

battery

from

sui-

the

touch

as

3.3.

MANUAL

15 V

DC

Fig.3.6.

OPERATION

The 1

621

Vibration

Connections
cells,

plug

Meter

WITH

is

ideally

of

1621.

shown

SOUND

or a Sound

for

suited

+15 V DC

ov

JP

0703

simultaneous

External

LEVEL

for

Level

view

AND

VIBRATION

use as an external

Meter.

operation,

of

socket,

soldering

METER

filter

and

to

portable

1621

External Power

Supply Socket

750447

charging

side

ETC

instruments

/ 1

of

such

as a

To

Ext.

Filter

Vibration

Meter
2511

Fig.3.7

Fig.3.

shows

7.

Combination
Sound,

some

examples

Sound Level

Meters
2203/2209
2210/2218

In Out

~--,··~

1-------S..;..y_nc_hr_o_nisa_t_io_n

·.

-~~-------------------------,

Tunable

Band

Pass

Filter

1621

of

Vibration

the

and

of

how

the

instruments

To

Ext.

·~·~In_....,....,

. --;_·-_.-Out

-,

.....

Flutter

Meter

6203

1621,

Flutter

Filter

..

___________

Recorder

2309

Tunable

meters

Level

Level

Recorder

2306

Band

may

Pass

be

set

filter,

up.

__,

with

AO

0182 (For 2306

AO

0034 (For 2306

A00034

with

serial N° below

718058)
with

serial N° above

718058)

790775

The 1 6 2 1 is used as

1.

Select

2.

Using
be used. The
be used

1

instruments

621

"Internal

the

INPUT VOLTAGE SELECTOR, select

actual

whenever a small

should

be

2203,

RMS".

follows:

Battery"

noise level is

set

to

2209,

or

"External

signal is

"1 V RMS".

2210,

Power"

lower

to

With

2218

in

be

or

as

required.

the

the

"0,2 V RMS"

filtered.

the

2511

6203,

maximum

With

the

set

to

the

1621

See

Section

input

position,

2511

set

"Peak -to

should

3.2.

voltage

so

this

to

"RMS",

Peak",

be set

range

should

or

to

"0,2

to

the

with

V

11

3.

Use

the
POWER ON
ever,

4.

Select
signal

5.

Set

6.

Using

FILTER SELECTOR knob

lamp

should

that

the

lamp

does

EXT. FILTER

to

the 1 621

the

SWEEP CONTROL

the

FREQUENCY RANGE SELECTOR,

.

on

light -if

not

light

the

Sound

switch

to

not,

for

a ±

Level

to

"Manual".

alysis.

7.

Using
the

8.

If
either
from

9.

Repeat 6

If

the

turned

the

FREQUENCY TUNING KNOB,

Meter

the

reading and

OVERLOAD

adjust

"0,2 V RMS"

and

frequencies

slowly

across

the

frequency.

indicator

the

signal

input

to

"1 V RMS"

7 as necessary.

of

interest

the

are

complete

lamp

lights,

amplitude

as

not

range

appropriate.

known,

QUENCY RANGE SELECTOR as necessary)

These

made

levels and

later

if

necessary

frequencies

to

give

should

improved

be

noted,

resolution

choose

check

14

V DC source).

Meter

choose

select

the

signal

or

change

the

in

the

until

high

and

the

required

the

power

or

Vibration

the

the

frequencies

input

the

first

analysis

supply.

Meter

decade

to

the

bandwidth.

(Remember,

in

use

of

interest

of

interest,

Filter

is

INPUT VOLTAGE SELECTOR

FREQUENCY TUNING KNOB
"23%"

then

around

levels

a 3%

those

position

are

indicated

bandwidth

frequencies.

(changing

on

analysis

and

too

the

apply

for

and

large

may

the

Meter.
can be

The

how-

a

an-

note

-

be

FRE-

3.4.

AUTOMATIC

OPERATION

It

is

often a great
alysis
Level
are
switch
cording
cable

8-pin

then

For a
cable

is proceeding. The 1 621 has been

Recorders Type

connected

is set

paper as soon as

to

be used depends upon

DIN socket, i.e. a

a cable

2306

AQ

0182

2306

Remote

Control Socket

WITH LEVEL

advantage

together

to

"Auto",

AQ

0034

before

number

should

JP

0703

RECORDERS

if a hard

2306

or

2309

with

the

appropriate

the

2306/2309

the

"Start"

the

2306

with a serial

should be used

718058,

be used. (see

copy

for

that

button

type

of

with

which

Fig.3.8

TYPE

2306

of a spectrum

designed

for

purpose.

will

cable,
sweep

has

and

been depressed.

Level Recorder

number

the

pins

connected

had a

for

7-pin

pin

connections).

JP

OR

can

use

When

the. 1621's

the

filter

718058

DIN socket

0802

2309

be

plotted

in

conjunction

the 1 621

synchronously

The

being

used. For

or

higher

1-1,

2-2,

for

1621

Sync.

Socket

770776

out

while

the

an-

with

Portable

and

2306/2309

SWEEP CONTROL

with

its

re-

synchronization

those

with

a

and

all

2309's,

...

8-8.

synchronization,

12

Fig.3.8.

Cable

1621

AQ
Filter

718058).

shown

0182

and

External

for

2306

view

frequency

Level

of

sockets,

synchronization

Recorder

(before

soldering

side

between

serial

of

plugs,

no.

The

1.

2.

3.

4.

5.

procedure

Connect

section

also
or

AQ

0182

On

the

1621

3.2.

Using
used.

Use

Set

the

the

the

SWEEP CONTROL

for

using

the 1 621

the

1621

3.
as

INPUT VOLTAGE SELECTOR, select

FILTER SELECTOR knob

3)

with

required.

select

and

the

"Internal

and

2306/2309

1 621

connected

Battery"

to

switch

to

2306/2309

into

or

choose

"Auto".

combination

the

instrumentation

to

the

Level Recorder

"External

the

the

required

Power"

maximum

analysis

is

as

follows:

line

as

required.

input

bandwidth.

by

as

required

cable

voltage

AQ

See

(see

0034

section

to

be

6. Check
the

0124,
2120

Set

PAPER DRIVE
POWER
PEN

or

PAPER
PEN
PAPER DRIVE

POWER

7.

Calibrate

ual).

8.

Using
terest

9.

Adjust

ning
KNOB
it does

correct

.

on

DRIVE

on

the

the
for

of

that

the

of

the

batteries

paper. For

QP

0143

2306:

2309:

the

FREQUENCY RANGE SELECTOR

analysis.

the

the

the 1 621

not

move

or QP

pen

deflection

position

frequency

during

the

0224

of

the

decade

is

irrelevant

the

are

fully

charged

2306

should

"In"
"On"
"In"

''Forward''
"Down"
"Cont
"On"

of

the

recording paper

to

be

when

sweep.

in

the

frequency

be used and

."

recorder (see

of

the

until

swept.

(The

tuning

appropriate

calibrated

for

the

the

2306

1621

the

pen

position

is

controlled

paper

2309

or

choose

lies

directly

of

the

by

Level Recorder

Type QP

Type QP

2309

Instruction

the

first

decade

over

FREQUENCY TUNING

the

2306/2309,

0120,

2100

the

and

or

Man-

of

begin-

fit
QP
QP

in-

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5.

SERVICE

AND

REPAIR

The 1 621
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instrumentation.

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DK-

2850

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452

8005oo

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· Telex,

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