HP 7044B Service manual

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1

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045B

HP

7044B/

7045B

General

Definitions

of

Safety

Symbols

Used

On

Equipment

rh

°

b

X

WARNING

International

caution

symbol

(refer

to

manual):

the

product

will

be

marked

with

this

symbol

when

it

is

necessary

for

the

user

to

refer

to

the

instruction

manual

in

order

to

protect

against

damage

to

the

instrument.

Indicates

dangerous

voltage

(terminals

fed

from

the

interior

by

voltage

exceeding

1000

volts

must

be

so

marked).

Protective

conductor

terminal.

For

protection

against

electrical

shock

in

case

of

a

fault.

Used

with

field

wiring

terminals

to

indi¬

cate

the

terminal

which

must

be

connected

to

ground

before

operating

equipment.

Low-noise

or

noiseless,

clean

ground

(earth)

terminal.

Used

for

a

signal

common,

as

well

as

providing

protection

against

electrical

shock

in

case

of

a

fault.

A

terminal

marked

with

this

symbol

must

be

connected

to

ground

in

the

manner

described

in

the

installation

(operating)

manual,

and

before

operating

the

equipment.

Frame

or

chassis

terminal.

A

connection

to

the

frame

(chassis)

of

the

equipment

which

normally

includes

all

exposed

metal

struc¬

tures.

Alternating

current

Direct

current

Alternating

or

direct

current

The

WARNING

sign

denotes

a

hazard.

It

calls

attention

to

a

pro¬

cedure,

practice,

or

the

like,

which,

if

not

correctly

performed

or

adhered

to,

could

result

in

personal

injury.

E

CAUTION

The

CAUTION

sign

denotes

a

hazard.

It

calls

attention

to

an

op¬

erating

procedure,

practice,

or

the

like,

which

if

not

correctly

performed

or

adhered

to,

could

result

in

damage

to

or

destruction

of

part

or

all

of

the

product.

HEWLETT

PACKARD

OPERATING

AND

SERVICE

MANUAL

7044B/7045B

X-Y

RECORDER

SERIAL

NUMBERS

This

manual

applies

directly

to

recorders

with

serial

numbers

prefixed

2047A.

For

additional

important

information

about

serial

numbers,

see

Recorders

Covered

by

Manual

in

Section

I.

©Copyright

HEWLETT-PACKARD

1980

16399

W.

BERNARDO

DRIVE,

SAN

DIEGO,

CALIFORNIA92127

MANUAL

PART

NO.

07044-90006

Microfiche

Part

No.

07044-90056

Printed:

NOVEMBER

1980

Model

7044B/7045B

Section

I

SECTION

I

INTRODUCTION

1.1

DESCRIPTION.

1-2.

BASIC

FRAME,

1*3.

The

Hewlett-Packard

Models

7044B

and

7045B

X-Y

Recorders

are

designed

for

the

laboratory

user

to

plot

cartesian

coordinate

graphs

from

do

electrical

information.

The

7044B

or

7045B

will

satisfy

the

needs

of

the

user

seeking

reliability

and

dependability.

The

7045B

recorder

features

high

speed

capability

and

rapid

acceleration

to

accurately

record

high-frequency

and

fast-moving

input

signals.

It

also

offers

a

RESPONSE

switch

which

allows

the

user

the

choice

of

a

fast

or

slow

response.

Both

models

are

equipped

with

the

newly

designed,

continuous

duty,

aluminum

framed

dc

servo

motor;

the

X-axis

of

the

7045B

contains

the

larger,

faster

motor.

This

design

concept

ends

overheating

or

wear

if

the

pen

is

driven

offscale

for

an

in¬

definite

time.

Other

features

found

on

the

7044B

and

7045B

include

14

calibrated

dc

input

ranges

in

each

axis

from

0,5

mV/in.

(0.25

mV/cm)

to

10

V/in.

(5

V/cm),

TTL

Remote

Control,

and

a

Rear

Connector.

Arbitrary

full

scale

voltage

ranges

may

be

established

with

a

variable

input

vernier

in

conjunction

with

the

calibrated

dc

ranges.

A.

trouble-free

electrostatic

hold-down

platen

capable

of

hold¬

ing

chart

paper

up

to

11

x

17

inches

and

the

standard

European

A3

size,

a

disposable

pen

with

four

color

choices,

and

plastic

coated

wirewound

balance

potentiometer

are

also

provided

on

both

models.

Latest

circuitry

design

and

assembly

techniques

have

also

been

incorporated

into

both

models,

thereby

reducing

failure

and

maintenance

time.

Additionally,

both

recorders

can

be

equipped

with

such

options

as

Time

Base,

Event

Marker,

or

Metric

Scaling.

See

Figures

1-1

and

1*2

depicting

the

standard

7044B

and

7045B

models.

1-4.

MODEL

-

MANUAL

INFORMATION,

1-5.

The

contens

of

this

manual

apply

to

recorders

with

the

serial

number

prefix(e$)

listed

under

SERIAL

NUMBERS

on

the

title

page.

The

serial

prefix

is

the

first

four

digits

and

a

letter

of

a

two-part,

ten-item

serial

number

(0000A-

00000)

used

to

identify

each

Hewlett-Packard

instrument

(see

Figure

1-3).

Should

any

change

to

this

manual

be'nec¬

essary,

a

new

serial

prefix

will

be

assigned

to

the

changed

model

and

a

change

sheet

(Manual

Change)

will

be

supplied

defining

the

differences

between

the

changed

model

and

the

one

described

within

this

manual.

Other

corrections

due

to

any

errors

that

existed

when

this

manual

was

printed

will

be

provided.

This

type

of

change,

called

Errata,

also

appears

on

the

change

sheet

(Manual

Change).

For

addi¬

tional

information

pertaining

to

these

recorders,

or

other

SERIAL

NUMBER

PREFIX

SERIAL

NUMBER

7044-R-2-I

Figure

1-3.

Instrument

Identification

Hewlett-Packard

instruments,

contact

the

nearest

Hewlett-

Packard

Sales/Service

Office.

1-6.

SPECIFICATIONS.

1

-7.

Table

1-1

lists

the

specifications

and

accessories

sup¬

plied

or

available

with

the

7044B

and

7045B

models.

Fig-

gure

14

illustrates

the

outside

dimensions.

Option

specifi¬

cations

are

also

defined

in

this

section.

1-8.

SAFETY

SYMBOLS.

1-9.

The

following

safety

symbols

are

used

with

this

Oper¬

ating

and

Service

Manual.

The

WARNING

sign

denotes

a

hazard.

It

calls

attention

to

a

procedure,

prac¬

tice,

or

the

like,

which,

if

not

correctly

performed

or

adhered

to,

could

result

in

injury

or

loss

of

life.

Do

not

proceed

beyond

a

WARNING

sign

until

the

in¬

dicated

conditions

are

fully

understood

and

met.

The

CAUTION

sign

denotes

a

hazard.

It

calls

attention

to

an

operating

pro¬

cedure,

practice,

or

the

like,

which,

if

not

correctly

performed

or

adhered

to,

could

result

in

damage

to

or

desctruc¬

tion

of

part

or

all

of

the

equipment.

Do

not

proceed

beyond

a

CAUTION

sign

until

the

indicated

conditions

are

fully

understood

and

met.

1-1

Section

I

Model

7044B/7045B

TABLE

1-1.

SPECIFICATIONS

PERFORMANCE

SPECIFICATIONS.

Input

Ranges:

Type

of

Input:

Input

Resistance:

Common

Mode:

Rejection

Slewing

Speed:

Acceleration:

0.5,1,2,

5,

10,

20,

50,

100,

200,

500

mV/in.,

1,2,5,10

V/in.

(metric

capability

available

in

0.25,0.5,1,

2.5,

5,10,

25,

50,

100,

250,

500

mV/cm,

1,2.5

5

V/cm).

Continuous

vernier

between

ranges.

Floating

30

Vdc

or

peak

ac

maximum.

Polarity

reversal

switch

located

on

front

panel,

guard

internally

connected.

Inputs

through

front

panel

5-way

binding

posts

or

optional

rear

con¬

nector.

Pen

lift

control

is

also

available

through

rear-mounted

banana

jack

connectors,

or

a

37-pin

rear

connector.

1

megohm

constant

on

all

ranges.

110

dB

dc

and

90

dB

ac

at

50

Hz

and

above

with

1

K

ohm

between

HI

and

LO

terminals,

CMR

voltage

applied

between

ground

and

LO,

and

attenuator

on

most

sensitive

range.

On

other

ranges

CMR

decreases

20

dB

per

decade

step

in

attenuation.

7044B

7045B

7044B

7045B

20

in/sec

(50

cm/sec)

minimum

(Fast

Response)

30

in/sec

(76

cm/sec)

minimum;

(Slow

Response)

15

in/sec

(36

cm/sec)

typical.

Y-axis,

lOOOin/sec

2.

(2540

cm/sec

2

.

)

X-axis,

500

in/sec

2

.

(1270

cm/sec

2

.

)

(Fast

Response)

Y-axis

3000

in/sec

2

.

(7620

cm/$ec

2

.

)

X-axis

2000

in/sec

2

.

(5080

cm/sec

2

.

)

(Slow

Response)

Y-axis

2500

in/sec

2

.

(6350

cm/sec

2

.

)

X-axis

1500

in/sec

2

.

(3800

cm/sec

2

.

)

TYPICAL

PERFORMANCE

LIMITS

Frequency

(Hz)

Accuracy:

Range

Accurary:

±0.2%

of

full

scale

(includes

linearity

and

deadband)

at

25°C.

Temperature

Coefficient

±0.01%

per

°C.

±0.2%

of

full

scale

±0.2%

deflection

(includes

linearity

and

deadband)

at

25°C.

Temperature

Coefficient

±0.01%

per

°C.

Deadband:

0.1%

of

full

scale.

Model

7044B/7045B

Section

I

_

TABLE

1-1.

SPECIFICATIONS

(Continued)

_

Overshoot:

7044B

-

2%

of

full

scale

(maximum).

7045B

-

1%

of

full

scale

(maximum).

Zero

Offset:

Zero

may

be

placed

anywhere

on

writing

area

or

electrically

off

scale

up

to

one

full

scale

from

zero

index.

Relative

Humidity:

5%

to

95%

(below

40°C).

TTL

REMOTE

CONTROL.

Operating

Levels:

Contact

closure

(0.2

mA)

to

ground

or

TTL

levels.

Logic

(0):

Between

-0.5

Vdc

and

+0.4

Vdc.

Logic

(1):

Between

+2.4

Vdc

and

5.5

Vdc.

REAR

CONNECTOR.

Connects

Event

Marker

and

TTL.

Provides

X

and

Y

inputs

and

pen

lift

TTL

controls.

Supplies

START

and

RESET

remote

capability.

TTL

and

Rear

Connector

provide

Electrostatic

Holddown

and

Servo

Standby

capability

on

Model

7044B.

Additionally

X

and

Y

Response

on

Model

7045B.

REMOTE

PEN

LIFT.

Banana

Jacks

provide

remote

control

of

pen

lift.

GENERAL

SPECIFICATIONS.

Writing

Mechanism:

Servo

actuated

ink

pen.

Writing

Area:

.

10

in.

x

15

in.

(25

cm

x

38

cm).

Paper

Holddown:

Electrostatic

paper

holddown

grips

charts

11

in.

x

16.5

in.

and

standard

European

size

A3

(29,7

cm

x

42

cm)

or

smaller.

Special

paper

not

required.

Pen

Lift:

Electric

(Remote,

via

contact

closure

or

TTL

level).

Power:

100,120,

220,

or

240

volts

ac

+5

-10%,

48

to

440

Hz;

7044B,

135

VA;

7045B,

175

VA

Weight:

7044B:

Net,

30

lb

(13,7

kg);

shipping

42

lb

(19,1

kg).

7045B:

Net,

30

lb

(13,7

kg);

shipping

44

lb

(20

kg).

MO,

OPTIONS.

1*11.

Optional

features

available

for

the

two

models

are

specified

in

Table

1-2.

The

following

paragraphs

describe

these

features

which

may

be

built

into

or

combined

with

these

recorders.

Table

1-3

contains

the

specifications

of

the

options.

1-12.

TIME

BASE

-

OPTION

001.

1-13.

Eight

speeds

from

0.5

sec/in.

to

100

sec/in.

are

avail¬

able

for

both

models

in

either

the

X

or

Y-axis.

In

the

7045B

model,

however,

with

the

addition

of

the

RESPONSE

switch,

the

selection

of

the

X

or

Y-axis

time

base

sweep

speed

automatically

results

in

the

SLOW

response

of

that

selected

axis;

the

other

axis

is

not

affected

and

operates

normally.

(May

be

ordered

only

at

time

of

recorder

purchase.)

See

Figure

1-5.

1-14.

EVENT

MARKER

-

ELECTRIC

-

OPTION

002.

1-15.

A

remotely

controlled

event

marker,

installed

at

the

top

of

the

Y

arm,

identifies

significant

events

in

a

recording

sequence

by

making

an

upward

deflection

in

the

margin

at

the

top

of

the

chart

paper.

See

Figure

1-6.

The

cartridge-

type

pen

is

actuated

by

a

remote

contact

closure.

This

option

may

be

field

installed.

1-3

Section

I

Model

7G44B/7045B

1-16.

METRIC

SCALING

-

OPTION

006.

1-17,

Metrically

scaled

and

calibrated

version

of

either

recorder

is

provided.

(May

be

ordered

only

at

time

of

recorder

purchase,)

1-18.

ACCESSORIES.

1-19.

Included

in

the

standard

Accessory

Kit

are

a

package

of

red

and

blue

disposable

pens,

slidewire

cleaner,

and

a

mating

connector.

Additional

accessories

are

added

when

certain

options

are

added.

TABLE

1-2.

OPTIONS

OPTION

DESCRIPTION

001

Time

Base

X

or

Y

002

Event

Marker

(Electric)

006

Metric

7044-B-3-2

Figure

14.

Model

7044B

/

7045B

Dimension

Drawing

Model

7044B/7045B

Section

1

TABLE

1-3.

OPTION

SPECIFICATIONS

TIME

BASE

-

OPTION

001

Sweep

Rates:

Eight

selectable

rates:

0.25,

0.5,

1,

2,

5,

10,

25,

50

sec/cm

(0.5,

1,2,

5,

10,

20,

50,

100

sec/in)

X

or

Y

axis.

XXL

sweep

indication

is

provided.

Accurary:

±1%

full

scale

at

25°C

(±0.1%

°C

maximum).

Linearity:

±0.5%

full

scale

at

25°C

(to

0.04%

/

°C

maximum).

EVENT

MARKER

-

ELECTRIC

-

OPTION

002

Marking

Area:

Upper

margin

aligned

with

X-axis

position.

Excursion:

Approximately

0.05

inch.

Ink

Capacity:

0.45

cm^

cartridge,

writing

distance

500

ft

minimum.

Control:

Remotely

by

contact

closure

to

ground

or

XXL

logic

control.

7044-A-4

;

2

Figure

1-5.

Time

Base

—

Option

001

7044-A-S-1

_

Figure

1-6.

Event

Marker

-

Option

002

1-5