HP SCR-1P Series Service-Handbuch

DC POWER SUPPLY

SCR-lP

SERIES, MODEL 6443B

SERIAL NUMBER PREFIX 6G

OPERATING

AND

SERVICE

MANUAL

HEWLETT

PACKARD

HARRISON

DIVISION

POWER SUPPLY

SCR

-l

P SERIES, MODEL 6443B

SERIAL

NUMBER

PREFIX

June,

1966

Stock

No.

06443-90001

HP Archive

This vintage Hewlett Packard document was

preserved and distributed by

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Prepared by on-line curator: Tony Gerbic

For FREE Distribution Only ***

Sectio

III

TABLE

OF CONTENTS

GENERAL INFORMATION •

1-1.

Description.

• •

1-2

•

General

• . • .

1-4.

Overload

Protection

Cooling

• • • • •

Title

1-9

•

Monitoring

• . • . • • • .

1-11.

Output

Terminals

1-13.

Instrument

Identification

INSTALLATION . . . .

2-1.

Initial

Inspection

. . . .

2-2.

General

. . . .

2-4.

Mechanical

Check

• . .

2-6.

Electrical

Check.

-8.

Installation

Data

. . . .

2-9.

General

. . . .

2-11.

Location

. . .

2-13.

Power

Requirements

2-15.

Power

Cable

. . . .

2-18.

Repackaging

for

Shipment.

OPERATING INSTRUCTIONS. .

3-1.

Controls

and

Indicators

. .

3-3.

Operation

..•.••

••

3-4.

General

. . • . • . . . .

3-6.

Normal

• • • • .

3-10

Connecting

Load.

3-14.

Remote

Sensing

• • • • • .

3-17

Remote

Programming

3-26.

Parallel

• • • . . . . .

-30.

Series

. • • • • •

Auto-Tracking

. • •

3-38.

Operating

Considerations.

3-39.

Pulse

. • • . .

3-41.

Output

Capacitance

. .

3-44.

Negative

Voltage

3-46.

Negative

Current

. . . .

. . .

. . . . .

. . .

. .

. . .

. .

. . .

Page

. • .

1-1

. . .

1-1

. . .

1-2

. •

2-1

. .

2-1

. •

2-1

. 2

-1

2-1

. 2

-1

2-1

. . 2- 2

. .

2-2

. 3

-1

• 3

-1

3-1

3-2

• . •

3-3

3-5

. • . . . .

3-6

•

3-7

. . . . .

3-7

. 3- 7

. . . .

3-7

Section

TABLE

OF CONTENTS

(cont.}

Title

Page

PRINCIPLES OF OPERATION . . . . . . . . . .

.4-1

4-1.

Block

Diagram

Description

. . .

.4-1

4-9.

Circuit

Description

• . . . . . . . . . . .

.4-2

4-1

Input.

. . . . . . . . . .

.4-2

4-12.

Output

• . . . . . . . . ..

4-2

4-14.

Voltage

Input

• . . . . . . .

.4-2

4-20.

Current

Input

. . . . . . .

.4-3

4-24.

ting

Circuit

. . . .

.4-4

4-27.

Turn-On

Circuit.

. . . . . . . . .

.4-4

4-29.

SCR

Regulator

Control

• . . . . .

-4

4-37.

SCR

Regulator

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

.4-6

4-42.

Bias

and

Reference

Circuit

. .

.4-6

MAINTENANCE . • . • . • . . .

5-1

5-1.

General

...........

. .

5-1

5-3.

Measurement

Techniques

. • • • •

••

5-1

5-7.

Performance

Check

• • . . . • • • . • • .

.••

5-2

.5-2

5-8.

General

. . . . . . . . . . .

5-10.

Rated

Outpu

and

Meter

Accuracy

• .

••

5-2

5-13.

Line

Regulation

. . . . . . • • . • . • • . .

5-3

.5-4

5-16

•

Load

Regula

on.

. . . . . . . • •

5-19.

Ripple

and

Noise

• . . . .

...

5-21.

Transient

Recovery

Time

...•.•.

5-23.

Additional

Specification

Check

5-24.

Temperature

Coefficient

5-2

Output

Stability.

. •

. . . . . . .

5-4

. . . . . . . .

5-5

5-6

. .

5-6

.5-6

5-30.

Remote

Programming

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

5-7

5-33.

Output

Impedance

. .

5-35.

Output

Inductance.

5-3

Cover

Removal

5-3

9 •

Troubleshooting

. . •

5-40.

General

. • . • •

5-42.

Trouble

Analysis

5-49.

Repair

and

Replacement

• . • • •

5-51.

Adjustments

and

Calibrations.

5-52.

General

• • • • • . . • • •

5-54.

Meter

Zero.

• • • .

5-56.

Voltmeter

Tracking.

. . • . .

.5-9

. . . . . .

5-9

• • . . . •

5-10

.5-10

. •

5-10

• •

5-10

• • • • . •

5-12

.5-14

. . . . . . .

5-14

. •

5-14

..•

5-14

5-58.,

Ammeter

Tracking

. • • • • • . • • .

.•.

5-14

5-15

. •

5-15

. • • . •

5-15

5-60.

Constant

Voltage

Programming

Cu.rrent

5-62.

Zero

Voltage

Output

. • • • • • • • • • • .

5-64.

Constant

Current

Programming

Current

•

Section

5-66.

5-68.

5-70.

5-72.

TABLE

OF CONTENTS

(cont.)

Title

Zero

Current

Output

. . . . . . .

Bias

and

Reference

Line

Regulation

Line

Imbalance

. • • . . . . .

Constant

Current

Load

Regula

tion

REPLACEABLE

PARTS

. . • . .

-1.

Introduction

• • • • .

-4.

Ordering

Information.

iii

. . .

5-16

. .

5-16

.5-17

5-18

.6-1

-1

.6-1

Table

1-1.

INPUT:

RATED

OUTPUT:

LINE REGULATION:

LOAD REGULATION:

RIPPLE AND

NOISE:

OPERATING TEMPERATURE RANGE:

STORAGE TEMPERATURE RANGE:

TEMPERATURE

COEFFICIENT:

OUTPUT

STABILITY:

(after

30-minute

warm-up)

REMOTE

PROGRAMMING:

TYPICAL OUTPUT

IMPEDANCE:

OUTPUT

INDUCTANCE:

Specifications

105-125

vac,

cps,

single

phase,

amperes,

400

watts

max.

Constant

Voltage:

120

vdc.

Constant

Current:

amperes

Constant

Voltage:

Less

than

60 mv

for

5-12

vac

input

change.

Constant

Current:

Less

than

25 ma

for

105-I25

vac

input

change.

Constant

Voltage:

Less

than

120 mv

for

ampere

load

change.

Constant

Current:

Less

than

for

vdc

load

change.

240 mvrms

Constant

Voltage:

05%

plus

30 mv

per

degree

centigrade.

Constant

Current:

per

degree

centigrade.

Constant

Voltage:

O.I5%

plus

for

hours

constant

temperature.

Constant

Current:

for

hours

constant

temperature.

Constant

Voltage:

300

ohms

per

volt

±.I%

Constant

Current:

ohms

per

ampere

Less

than

I ohm from

cps

Less

than

0 ohm from

cps

IOO

cps

Less

than

•5 ohm from

100

cps

Ike

Less

than

0 ohm from

Ike

IOO

microhenry

Table

1-1.

Specifications

(cont.)

TRANSIENT RECOVERY TIME:

SIZE AND WEIGHT:

FINISH:

..:

~.~!.!,.

'°"';1-~:!!:

•

,::-i.N~

(f\~

\IC)l_flGI: ------:1..

·® -e

constant

voltage

operation,

less

than

300

milliseconds

required

for

output

voltage

recovery

within

600

millivolts

the

nominal

output

voltage

following

load

change

equal

one

half

the

maximum

current

rat,ing

the

power

supply.

Nominal

output

voltage

defined

the

mean

between

the

no-load

and

full-load

voltages.

The

transient

amplitude

is'

less

than

volt

per

ampere

for

any

load

change

between

20%

and

100%

rated

output

current.

(Excluding

the

initial

spike

approximately

100

microseconds

dura-

tion

which

significant

only

for

load

rise

times

faster

than

0 .2

ampere

per

micro-

second.)

Heioht

Width

3-1/2

in.

Depth

17-1/2

in.

Weight

lb.

Light

gray

front

panel

with

dark

gray

case.

•

""'-

'"'

+ -

~CUM0-1~

...

-e •

Figure

1-1.

Model

64438

Power

Supply

SECTION I

GENERAL

INFORMATION

l::l.

DESCRIPTION

1-2.

GENERAL

1-3.

The

H-Lab

Model

6443'A

Power

Supply

(fig.

completely

solid-

state,

compact,

well

regulated,

constant

voltage/constant

current

power

supply

suitable

for

either

bench

relay

rack

operation.

three-wire

five-foot

power

cord

provided

The

output

continuously

variable

between

and

12..Qvdc,

and

be-

tween

and

5amperes.

Detailed

specifications

are

given

table

1-1.

1-4.

OVERLOAD

PROTECTION

1-5.

crossover

feature

protects

both

power

supply

and

load

constant

voltage

operation.

Automatic

crossover

circuitry

switches

the

power

supply

from

constant

voltage

constant

current

operation

the

output

current

exceeds

preset

limit.

This

crossover

circuitry

also

protects

the

load

from

overvoltage

during

constant

current

operation

automatically

switching

the

power

supply

into

constant

voltage

operation

The

user

can

adjust

the

crossover

point

via

the

front

panel

controls

(para.

3-8

and

3-9)

•

1-6.

The

power

supply

protected

from

reverse

voltage

(positive

voltage

applied

negative

terminal)

diode

that

shunts

current

across

the

output

terminals

when

this

condition

exists

The

input

fused.

double-pole

on/off

switch

opens

both

power

leads

the

off

position.

1-7.

COOLING

1-8.

Convection

cooling

used.

fan

required

The

power

supply

has

moving

parts

(except

meter

movement).

1-9.

MONITORING

1-10.

Two

front-panel

meters

are

provided

for

monitoring

output

voltage

and

current.

The

voltmeter

has

.a 0

tol

2·D

volt

range

and

the

ammeter

has

a 0

ampere

range.

Each

meter

has

accuracy

full

scale.

1-11

• OUTPUT TERMINALS

1-12.

Output

power

available

via

terminal

strip

the

rear

panel.

The

rear

panel

terminal

strip

also

enables

the

power

supply

connected

for

different

modes

operation

(para.

3-3).

The

output

terminals

are

isolated

from

the

chassis

1-1

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