Hp 59501a Service manual

HEWLETT

MANUAL

CHANGES

Model

59501A

HP-IB

Isolated

D/A

Power

Supply

Programmer

Manual

HP

Part

No.

59501-90001

Make

all

corrections

in

the

manual

according

to

errata

below,

then

check

the

following

table

for

your

^instrument's

serial

number

and

enter

any

listed

change(s)

in

the

manual.

SERIAL

MAKE

CHANGES

Prefix

Number

Ail

—

Errata

1702A

00150-00244

1

1717A

00245-00799

1,2

1815A

00800-up

1,2,3

CHANGE

2:

On

page

6-8,

change

the

HP

Part

No.

of

the

A1U32

heatsink

to

59501-00007.

►

CHANGES:

Change

power

transformer

(T1

Chassis

Electrical)

HP

Part

No.

59501-80090

to

HP

Part

No.

59501-80091.

4-25-78

ERRATA:

On

schematic,

Figure

7-3

(Sheet

2),

in

output

amplifier

circuit,

connect

one

end

of

C22

to

\l/'

instead

of

th

■

On

Main

Board

Assy.

A1

component

location

diagram,

in

+5

regulated

supply

circuit,

add

reference

designation

U32

to

pads

to

the

right

of

C27.

in

Table

5-1,

page

5-1,

change

logic

probe

impedance

to

25kn.

CHANGE

1:

This

change

incorporates

vertically

mounted

variable

resistors

to

make

calibration

easier

and

to

avoid

wiper

jump.

On

page

6-6,

make

the

following

changes

to

the

Replaceable

Parts

Table.

R26

change

to

25k

HP

Part

No.

2100-3282.

R49

change

HP

Part

No.

to

2100-3089.

R61

change

to

25k

HP

Part

No.

2100-3282.

On

schematic,

Figure

7-3

(Sheet

2),

change

values

of

R26

and

R61

to

25k.

ERRATA:

On

page

6-9,

change

the

HP

Part

No.

of

the

line

cord

used

in

the

U.

S.,

Canada,

Japan,

Italy,

and

Spain

to

8120-1348.

SECTION

!

GENERAL

INFORMATION

1-1

INTRODUCTION

1-2

This

instruction

manual

contains

operating

and

service

instructions

for

the

HP-IB

Isolated

D/A

Power

Supply

Programmer

Model

59501

A.

Installation

instructions

and

sample

programs

are

also

provided.

The

59501A

allows

HP

power

supplies

to

be

digitally

controlled

via

the

Hewlett-Packard

Interface

Bus

(HP-lB)

from

a

calculator,

computer,

or

other

controller.

The

digital

format

is

bit

parallel,

byte

serial,

ASCII

coded

format.

The

59501A

can

also

be

used

on

the

HP-IB

as

a

digitally-programmable

low

level

dc

signal

source.

Since

the

59501

A

can

be

controlled

(programmed)

by

various

control

devices

such

as

HP

9800

series

calculators

or

the

HP-2100

series

computers,

hereafter

in

this

manual,

the

controlling

device

will

be

referred

to

as

the

''controller'',

except

when

specific

programming

examples

are

provided.

1-3

DESCRIPTION

1

-4

The

59501A

is

basically

a

digital-to-analog

(D/A)

converter

that

provides

an

output

voltage

in

response

to

digital

data

received

on

the

HP-IB.

Two

programmable

output

ranges

(1V

and

10V)

are

available,

in

addition,

a

switch

on

the

rear

panel

allows

selecting

either

a

unipolar

or

bipolar

output

mode.

The

unipolar

mode

provides

a

0

to

.999V

or

a

0

to

9.99V

output

range

and

the

bipolar

mode

provides

a

—1

V

to

+0.998V

or

a

—I

OV

to

+9.98V

output

range.

The

59501

A's

output

can

be

used

as

a

programming

voltage

for

controlling

a

wide

range

of

dc

voltages

and

currents

from

HP

power

supplies

or

as

a

source

voltage

for

testing

electronic

components

such

as

integrated

circuit

packages

(IC's).

1-5

Isolators

within

the

59501

A

protect

other

instru¬

mentation

on

the

HP-IB

from

damage

that

could

be

caused

by

power

supply

outputs,

Also,

an

interna!

circuit

ensures

that

the

output

Is

held

near

zero

until

programmed

data

is

received.

Power

supply

programming

is

accomplished

through

use

of

the

59501

A's

programmable

output

voltage

and

its

front

panel

adjustments.

By

making

the

appropriate

connections

between

the

59501

A's

rear

terminals

and

the

programming

terminals

on

the

supply,

the

output

voltage

(or

current,

if

available)

of

the

power

supply

can

be

programmed

from

zero

to

its

full

rated

output.

The

59501

A's

front

panel

adjustments

provide

fast

and

easy

cali¬

bration

of

power

supply

outputs.

The

ZERO

ADJUST

enables

the

user

to

correct

for

small

offsets

in

power

supply

response

to

programmed

inputs.

The

POWER

SUPPLY

FULL

SCALE

ADJUSTMENT

(COARSE

and

FINE)

allows

the

user

to

set

the

maximum

output

desired

from

the

power

supply

when

the

59501A

is

programmed

to

its

maximum

output.

This

method

of

programming

is

called

voltage

programming

with

gain.

Power

supply

program¬

ming

is

described

in

greater

detail

in

Section

III.

1-6

Programming

the

59501A

is

accomplished

through

the

transmission

of

four

consecutive

digits

(four

ASCI!

characters).

The

first

digit

specifies

output

range

and

the

digits

specify

the

magnitude

within

the

selected

range.

The

high/low

range

capability

provides

a

ten

to

one

improvement

in

resolution.

Internal

conversion

circuitry

enables

the

59501A

to

produce

its

maximum

output

voltage

in

approximately

250iUsec

from

the

time

the

digital

data

is

received.

Output

current

up

to

10

milliamps

is

available

and

is

automatically

limited

to

protect

the

59501A

and

the

user

equipment.

1-7

HP-IB

CAPABILITIES

1-8

The

59501Ahas

"listener”

and

"acceptor

hand¬

shake"

HP-iB

functional

capabilities.

The

LISTENING

indicator

on

the

front

panel

provides

a

convenient

means

of

monitoring

the

59501

A's

operating

status.

The

59501A

does

not

have:

controller,

talker,

source

handshake,

service

request,

device

trigger,

extended

listener,

extended

talker,

parallel

poll,

and

remote/local

HP-iB

functional

capabilities.

Alt

HP-IB

functional

capabilities

are

described

in

IEEE

Standard

488-1975.

1-9

SPECIFICATIONS

1-10

Detailed

specifications

for

the

59501A

are

given

in

Table

1-1.

1-11

ACCESSORIES

1-12

The

System-ll

cabinet

accessories

listed

below

may

be

ordered

with

the

59501A

unit

or

separately

from

your

local

Hewlett-Packard

field

sales

office

(refer

to

list

at

rear

of

manual

for

addresses).

All

accessories

applicable

to

System-1!

modular

cabinets

are

fully

described

and

illustrated

in

the

Hewlett-Packard

Electronic

Instruments

and

Systems

catalog.

1-1

HP

Part

No.

Description

5061-0088

Two

front

handies

that

attach

to

each

side

of

3

1/2”

high

cabinets.

5061-0094

Kit

of

lock

link

hardware

for

joining

together

cabinets

of

equal

depth.

Units

can

be

joined

side-by-side

or

vertically.

This

kit

is

required

whenever

two

(or

more)

sub-module

units

are

to

be

rack

mounted

side-by-side.

1460-1345

Tilt

stand

snaps

into

standard

foot

supplied

with

instrument

—

must

be

used

in

pairs.

5061

-0054

Rack

mounting

kit

for

one

half

module

width

unit,

3

1/2-inches

high.

Includes

one

rack

flange

(ear)

and

one

half

module

width

extention

pane!

(adapter).

5061

-0076

Rack

mounting

kit

for

two

half

module

units,

3

1

2"

high.

Kit

includes

two

rack

flanges

(ears).

Also,

lock-together

kit

(5061-0094)

is

required

for

joining

the

two

units

together.

The

cabinets

must

also

be

of

equal

depth.

5061-0055

Rack

mounting

kit

for

two

units

(one

half

module

width

and

one

quarter

module

width).

Kit

includes

one

rack

flange

and

one

quarter

width

extension

adapter.

Lock-together

kit

(5061-0094)

is

required

for

joining

the

two

units.

5061-0096

Support

shelf

for

mounting

one

or

more

3

1

2"

high

units

which

are

half

module

or

quarter

module

width.

Cabinet

depths

need

not

be

equal.

5061-2021

Front

filler

panel

(one

quarter

module

width)

for

3

1

2"

high

support

shelf.

5061-2022

Front

filler

panel

(one

half

module

width)

for

3

1

2"

high

support

shelf.

1494-001

5

Slide

kit

for

support

shelves

mounted

in

HP

rack

enclosures.

1-13

INSTRUMEMT

AND

MANUAL

IDENTIFICATION

1-14

Hewlett-Packard

Instruments

are

identified

by

a

two

part

serial

number.

The

first

part

is

the

serial

number

prefix,

a

number-letter

combination

that

denotes

the

date

of

a

significant

design

change

and

the

country

of

manufac¬

ture.

The

first

two

digits

indicate

the

year

(10

"

1970,

11

=

1971,

etc.),

the

second

two

digits

indicate

the

week,

and

the

letter

"A”

designates

the

U.

S.

A.

as

the

country

of

manufacture.

The

second

part

is

the

instrument

serial

number;

a

different

sequential

number

is

assigned

to

each

instrument,

starting

with

00101.

1-15

if

the

serial

number

on

your

instrument

does

not

agree

with

those

on

the

title

page

of

the

manual.

Change

Sheets

supplied

with

the

manual

of

Manual

Backdating

Changes

define

the

difference

between

your

instrument

and

the

instrument

described

by

this

manual.

1-16

ORDERING

ADDITIONAL

MANUALS

1-17

One

manual

is

shipped

with

each

instrument.

Additional

manuals

may

be

purchased

from

your

local

Hewlett-Packard

field

office

(see

the

list

at

the

rear

of

this

manual

for

addresses).

Specify

the

model

number,

serial

number

prefix,

and

the

HP

Part

Number

provided

on

the

title

page.

1-2

Table

1-1.

Specifications,

Model

59501A

D/A

CONVERTER

DC

Output

Voltage:

Programmable

in

high

or

low

ranges

within

the

voltage

limits

shown

below.

Output

mode

is

unipolar

or

bipolar

and

is

selectable

via

rear

panel

switch.

High

Low

Unipolar

0

to

9.99

Volts

0

to

+.999

Volts

Bipolar

—10

to

+9.98

Volts

—1

to

+.998

Volts

DC

Output

Current:

10mA

Resolution:

High

Low

Unipolar

lOmV

1mV

Bipolar

20mV

2mV

Accuracy:

Specified

at

23“

C

±

5“C

High

Low

Unipolar

.1%+

5mV

.1%+

ImV

Bipolar

.1%+

10mV

.1%+

2mV

*

Stability:

Change

in

output

over

8

hour

interval

under

constant

line,

load,

and

ambient

following

a

30

minute

warm-up.

High

Low

Unipolar

.04%

+

.5mV

.04%

+

,1mV

Bipolar

.04%

+

1

mV

.04%

+

.2mV

Temperature

Coefficient;

High

Low

Unipolar

.01%/°C

+

.5mV/"C

.01%/“C

+

.1mV/"C

Bipolar

.01

%/°C

+

.5mV/°C

.01%/°C

+

.1

mV/°C

Zero

Adjust:

Plus

or

minus

250

millivolts.

D/A

Full

Scale

Adjust:

Plus

or

minus

5%.

Programming

Speed:

The

time

required

for

output

to

go

from

zero

to

99%

of

programmed

output

change

is

250iUsec

{measured

with

resistive

load

connected

to

output

terminals).

*

Stability

is

included

in

accuracy

specification

measure¬

ments

over

the

temperature

range

indicated.

POWER

SUPPLY

PROGRAMMING

Programming

Network

Specifications:

In

the

following

spec¬

ifications,

M

represents

the

calibrated

full

scale

value

of

the

supply

being

programmed

and

P

represents

the

actual

pro¬

grammed

output.

Note

that

the

full

scale

value

(M)

can

be

any

value

within

the

supply's

output

range

and

is

calibrated

with

the

59501A

programmed

to

its

maximum

high

range

output.

Accuracy

(Does

not

include

power

supply

errors):

Specified

at

23'’C±

5°C.

High

l^w

Unipolar

.05%!V!

+

.25%P

.01%1VI

+

.25%P

Bipolar

0.1%M

+

.25%P

.02%IV1

+

.25%P

Isolation:

BOOVdc

between

HP-IB

data

lines

and

output

terminals.

Temperature

Coefficient:

High

.005%M/'’C

+

.01

5%P/°C

Low

.01

%M/°C

+

.01

5%P/°C

Programming

Resolution:

High

Low

Unipolar

0.1%IV1

0.01

%M

Bipolar

0.2%IV1

0.02%l\/l

Programming

Speed:

D/A

Conversion

Time

plus

the

programming

speed

of

the

power

supply.

GENERAL

Input

Power:

Unit

has

ac

power

module

which

is

settable

to:

100/120/220/240Vac

(-13%,

+6%),

48-63Hz,

10VA.

A

3-wire

detachable

line

cord

is

supplied.

Temperature

Range:

Operating:

0to55°C

Storage:

-40to75''C

Dimensions:

(See

Figure

2-1)

Weight:

Net:

1.36kg.

(3

ib.)

Shipping:

1.81

kg.

(4

ib.)

1-3

SECTION

II

INSTALLATION

2-1

INITIAL

INSPECTION

2-2

Before

shipment,

this

instrument

was

inspected

and

found

to

be

free

of

mechanical

and

electrical

defects.

As

soon

as

the

instrument

is

received,

proceed

as

instructed

in

the

following

paragraphs.

2-3

Mechanical

Check

2-4

If

external

damage

to

the

shipping

carton

is

evident,

ask

the

carrier's

agent

to

be

present

when

the

instrument

is

unpacked.

Check

the

instrument

for

external

damage

such

as

broken

switches

or

connectors,

and

dents

or

scratches

on

the

panel

surfaces.

If

the

instrument

is

damaged,

file

a

claim

with

the

carrier's

agent

and

notify

your

local

Hewlett-

Packard

Sales

and

Service

Office

as

soon

as

possible

(see

list

at

rear

of

this

manual

for

addresses).

2-5

Electrical

Check

2-6

Check

the

electrical

performance

of

the

instrument

as

soon

as

possible

after

receipt.

Section

V

of

this

manual

contains

procedures

which

will

verify

instrument

operation

on

the

HP-IB.

These

procedures

are

also

suitable

for

incom¬

ing

quality

control

inspection.

Refer

to

the

inside

front

cover

of

the

manual

for

the

Certification

and

Warranty

statements.

2-7

REPACKAGING

FOR

SHIPMENT

2-8

To

insure

safe

shipment

of

the

instrument,

it

is

recommended

that

the

package

designed

for

the

instrument

be

used.

The

original

packaging

material

is

reusable.

If

it

is

not

available,

contact

your

local

Hewlett-Packard

field

office

to

obtain

the

materials.

This

office

will

also

furnish

the

address

of

the

nearest

service

office

to

which

the

instru¬

ment

can

be

shipped.

Be

sure

to

attach

a

tag

to

the

instru¬

ment

specifying

the

owner,

model

number,

full

serial

number,

and

service

required,

or

a

brief

description

of

the

tiouble.

2-9

INSTALLATION

DATA

2-10

The

59501A

is

shipped

ready

for

operation

on

the

HP-IB.

Before

connecting

it

to

a

controller

and

applying

power,

read

paragraph

2-26.

2-11

Outline

Drawing

2-12

Figure

2-1

illustrates

the

outline

shape

and

dimensions

of

Model

59501

A.

2-13

Rack

Mounting

2-14

The

59501Acan

be

rack

mounted

in

a

standard

19-inch

rack

pane!

either

by

itself

or

alongside

another

half

{or

quarter)

System-ll

module

of

equal

height

and

depth.

All

rack

mounting

accessories

for

this

unit

are

listed

in

paragraph

1-11.

Also,

complete

installation

instructions

are

included

with

each

rack

mounting

kit.

2-15

Equipment

Required

2-16

If

an

HP

calculator

is

used

to

program

the

59501

A,

the

following

equipment

is

required;

HP***

Calculator

I/O

Card

Package

ROM

9820A

59405A

Option

020*

HP-IB

I/O

Math

9821A

59405A

Option

021*

HP-IB

I/O

Math

9825A

98034A

HP-IB

I/O

General

I/O

Extended

I/O

9830A

59405A

Option

030**

HP-IB

I/O

*

Includes

Peripheral

Control

M

ROM

Includes

Extended

I/O

ROM

***

If

an

HP-2100

series

computer

is

used

as

the

controller,

the

5931

OB

HP-IB

Computer

Interface

card

is

required.

2-17

HP-IB

Connector

2-19

The

HP-IB

connector

on

the

rear

of

the

59501A

interfaces

directly

to

the

HP-IB.

Figure

2-2

illustrates

the

configuration

of

the

HP-IB

connector

which

is

a

24-pin,

2-1

type

57

micro-ribbon

connector.

One

HP-IB

cable

is

supplied

with

each

HP

computer

and

calculator

I/O

card

package.

Extra

cables

may

be

ordered

separately.

HP-IB

Cable

Model

No.

Cable

Length

10631A

10631B

10631C

1m

(3.3

ft.)

2m

(6.6

ft.)

4m

(13.2

ft.)

NOTE

The

HP-IB

connector

supplied

with

this

unit

contains

metric

fasteners

(colored

black).

If

your

HP-IB

cable

connector

contains

standard

mating

screws

(silver),

make

a

conversion

using

the

hardware

and

instructions

included

in

Metric

Conversion

Kit

(5060-0138).

2-19

The

HP-IB

cables

use

the

same

piggyback

con¬

nector

on

both

ends.

Up

to

three

connectors

may

be

stacked

one

upon

another.

As

many

as

15

instruments

(including

the

controller)

may

be

connected

to

the

same

HP-IB.

2-20

System

Connections

2-21

Figure

2-3

illustrates

a

controller

(e.

g.,

a

9825A

calculator)

and

a

59501A

unit

connected

to

the

HP-IB.

In

this

case,

the

98034A

interface

card

provides

HP-IB

capa¬

bility

for

the

9825A

calculator

and

is

installed

in

any

one

of

the

three

slots

in

the

rear

of

the

calculator.

The

98034A

card

is

equipped

with

the

proper

cable

and

connector

to

mate

with

the

HP-IB

connector

on

the

rear

of

the

59501

A.

Note

that

specific

connections

between

the

59501

A’s

output

ter¬

minals

and

the

user's

device

(e.g.

programmable

power

supply)

SIGNAL

GROUND

24

12

P/0

TWISTED

PAIR

WITH

II

23

11

P/0

TWISTED

PAIR

WITH

10

22

10

P/0

TWISTED

PAIR

WITH

9

P/0

TWISTED

PAIR

WITH

8

21

20

9

8

P/0

TWISTED

PAIR

WITH

7

19

7

P/0

TWISTED

PAIR

WITH

6

18

6

'

..fREN

17

5

LD108

16

4

Dior

15

3

0106

14

2

DIOS

13

1

¥r

SIGNAL

GROUND

SHIELD

ATN

SRQ

IFC

NOAC

NRFO

DAV

EOI

0104

0103

0102

0101

note;

type

57

MICRO-

RIBBON

CX)(^CT0R

(AMPHENOL

OR

CINCH)

**

NOT

PROCESSED

BY

5950IA

HP-IB

LOGIC

LEVELS;GROUND

TRUE.TTL

C(»^PATIBLE.

INPUT

LEVELS

(FROM

HP-IB):

1

«

TRUE

<0-8V

ei»FALSE>2,OV

OUTPUT

LEVELS

(TO

HP-IB):

1

•

TRUE

«0VDC

TO

0,4VDC

0-FALSE>’-r2.5VDC

T0-f5V0C

Figure

2-2.

HP-IB

Connector

are

not

illustrated

on

Figure

2-3.

These

connections

depend

upon

the

particular

power

supply

being

programmed'and

the

type

of

control

desired

(output

voltage

or

current).

The

connections

required

to

program

various

HP

power

supplies

are

provided

in

Section

111,

paragraph

3-45

through

3-52.

2-22

Setting

Addresses

2-23

The

I

isten

address

for

the

59501A

is

selected

by

address

switches

on

the

rear

of

the

unit.

The

switches

are

factory

set

to

the

suggested

listen

address

of

&

when

the

unit

is

shipped

from

the

factory.

As

shown

in

Figure

2-4,

there

are

seven

address

switches.

The

last

two

switches,

6

and

7

(XX),

are

ignored

(have

no

affect).

Switches

1,4,

and

5

are

set

to

"0"

and

switches

2

and

3

are

set

to

"1''

to

select

a

listen

address

of

Note

that

is

the

suggested

listen

address

and

is

one

of

31

listen

address

possibilities.

The

address

switch

settings

for

each

of

the

31

listen

address

possibilities

are

listen

in

Table

2-1.

2-2

CONTROLLER

(E.G.

9825A

CALCULATOR)

CONNECTIONS

BETWEEN

THE

6950IA'S

OUTPUT

TERMINALS

AND

THE

PROGRAMMING

TERMINALS

OF

APPLICABLE

HP

PROGRAM¬

MABLE

POWER

SUPPLIES

ARE

DESCRIBED

IN

SECTION

m.

Figure

2-3.

System

Connections

2-24

The

HP-IB

bus

interface

cards

for

the

HP

calcula¬

tors

are

shipped

from

the

factory

with

a

preset

talk

address

of

"U"

and

a

preset

listen

address

of

"5".

Before

program¬

ming,

write

down

the

listen

and/or

talk

address

of

all

instruments

connected

to

the

HP-IB.

2-25

Unipolar/Bipolar

IVlode

Switch

2-26

The

UNIPOLAR/BIPOLAR

mode

switch

is

a

push-in,

push-out

type

switch

located

on

the

rear

of

the

unit

beneath

the

output

terminal

strip,

in

the

UNIPOLAR

mode

(switch

is

in),

the

59501A

provides

an

output

range

of

0

to

0.999V

or

0

to

9.99V.

In

the

BIPOLAR

mode

(switch

is

out),

the

59501A

provides

an

output

range

of

-

■

1V

to

+0.998V

or

—10V

to

+9.998V.

The

switch

is

set

to

UNIPOLAR

when

the

unit

is

shipped

from

the

factory.

2-27

Input

Power

Requirements

And

Line

Voltage

Conversion

2-28

The

59500A

may

be

operated

continuously

from

a

nominal

100V,

120V,

220V,

or

240V

(48-63Hz)

power

Figure

24.

Listen

Address

Switches

on

Rear

of

59501A

Table

2-1.

Listen

Addresses

and

Switch

Settings

Address

Switches

Listen

Address

Character

5

B

3

2

in

0

SP

0

1

0

••

0

1

#

0

$

0

1

%

0

&

0

1

'

0

1

0

(

0

1

0

1

)

0

1

0

«

0

1

0

1

-f

0

1

0

1

0

1

-

0

1

0

1

/

1

0

a

1

0

1

0

1

0

2

1

0

1

3

1

0

1

0

4

1

0

1

0

1

5

1

0

1

0

6

1

0

1

7

1

0

8

1

0

1

9

1

0

1

0

1

0

1

*

1

0

<

1

0

1

ss

1

0

>

2-3

source.

A

printed

circuit

board

located

within

the

ac

power

module

on

the

rear

panel

selects

the

power

source.

Voltage

choices

are

available

on

both

sides

of

the

PC

board.

Before

connecting

the

instrument

to

the

power

source,

check

that

the

PC

board

selection

matches

the

nominal

line

voltage

of

the

source.

The

operating

voltage

that

is

selected

is

the

one

printed

on

the

lower-left

side

of

the

PC

board

(see

Figure

2-5).

As

shipped

from

the

factory,

the

PC

board

in

this

unit

is

positioned

for

120Vac

operation.

To

select

another

input

voltage

proceed

as

follows:

a.

Remove

power

cable

from

instrument.

b.

Move

plastic

door

on

power

module

aside.

c.

Rotate

FUSE

PULL

to

the

left

and

remove

line

fuse

FI.

d.

Remove

PC

board

from

slot.

Select

operating

voltage

by

orienting

PC

board

to

position

the

desired

vol

tage

on

top-left

side

of

PC

board.

Push

board

firmly

into

slot.

e.

Rotate

FUSE

PULL

back

into

normal

position

and

re-insert

fuse

F1

in

holder

using

caution

to

select

the

correct

value

for

FI

{125mA

for

100V

or

120V

and

62.5mA

slo-blo

for

220V

or

240V).

f.

Close

plastic

door

and

connect

power

cable.

2-29

When

the

instrument

leaves

the

factory,

a

125mA

fuse

is

installed

for

120V

operation.

An

envelope

contain¬

ing

a

62.5mA

fuse

for

220V/240V

operation

is

attached

to

the

instrument.

Make

sure

that

the

correct

fuse

value

for

FI

is

installed

if

the

position

of

the

PC

board

is

changed.

2-30

Power

Cable

2-31

This

unit

is

factory

equipped

with

a

power

cord

plug

that

is

the

most

appropriate

for

the

user's

location.

The

replaceable

parts

section

of

this

manual

lists

ail

of

the

power

cords

associated

with

this

unit,

if

a

different

power

cord

is

desired,

contact

your

nearest

HP

Sales

Office.

2-32

To

protect

operating

personnel,

the

National

Electrical

Manufacturers

Association

(NEMA)

recommends

that

the

instrument

panel

and

cabinet

be

grounded.

This

instrument

is

equipped

with

a

three

conductor

power

cable.

The

third

conductor

is

the

ground

conductor

and

when

the

cable

is

plugged

into

an

appropriate

receptacle,

the

instru¬

ment

is

grounded.

The

offset

on

the

power

cable

three-

prong

connector

is

the

ground

connection.

In

no

event

shall

this

instrument

be

operated

without

an

adequate

cabinet

ground

connection.

2-33

To

preserve

the

protection

feature

when

operating

the

instrument

from

a

two-contact

outlet,

use

a

three-prong

to

two-prong

adapter

(if

permitted

by

local

regulations)

and

connect

the

green

lead

on

the

adapter

to

ground.

2-4

SECTION

III

OPERATING

INSTRUCTIONS

3-1

INTRODUCTION

3-2

This

section

contains

operating

instructions

and

programming

information

for

the

59501A

Isolated

D/A,

Power

Supply

programmer.

Since

the

59501

A

can

be

used

as

a

power

supply

programmer

or

as

D/A

converter

{low

level

dc

signal

source),

operating

instructions

and

program¬

ming

examples

are

provided

to

cover

both

applications.

Additional

information

regarding

use

of

the

59501A

is

provided

in

HP-IB/Power

Supply

Application

Guide,

HP

Part

No.

5952-3990.

3-3

PRE-OPERATiONAL

CONSIDERATIONS

3-4

Before

connecting

the

59501

A

to

an

ac

power

source,

ensure

that

the

proper

operating

voltage

(100,

120,

220,

or

240Vac)

has

been

selected

and

the

proper

fuse

is

installed

(see

paragraph

2-27).

Also,

check

that

the

address

switches

are

set

correctly,

the

UNIPOLAR/BIPOLAR

mode

switch

is

set

to

the

desired

position,

and

at!

HP-IB

system

cabling

is

installed

(see

paragraphs

2-20

through

2-26).

Connections

between

the

59501A

and

the

user's

device

(e.

g.

HP

Power

Supply)

are

described

in

subsequent

para¬

graphs.

3-5

CONTROLS

AND

INDICATORS

3-6

Front

Panel

3-7

The

59501A

front

panel

contains

a

power

on

indi¬

cator,

a

status

indicator

and

four

controls

(screwdriver

ad¬

justments)

as

shown

in

Figure

3-1.

3-8

The

power

on

(ON)

indicator

(?)

(Figure

3-1)

lights

and

the

59501

A's

internal

supply'voltages

(+15V,

±15V,

V^jj)

are

present

when

the

line

cord

is

piugged-in.

3-9

The

LISTENING

indicator

(

5

)

lights

when

the

59501A

is

addressed

to

"listen"

and

remains

lighted

until

an

"unlisten"

command

or

the

interface

clear

signal

is

received

from

the

controller.

When

lighted,

it

indicates

that

the

59501A

is

enabled

to

process

data

words

received

on

the

HP-IB.

When

it

is

not

lighted,

it

indicates

that

the

59501

A

is

inhibited

from

processing

data

words.

3-10

The

front

panel

screwdriver

adjustments

allow

fast

and

easy

calibration

of

D/A

and

power

supply

outputs.

Each

adjustment

is

described

below.

3-11

The

ZERO

ADJUST

(5)

allows

the

59501A

out^

put

to

be

adjusted

to

OV

±

250

millivolts

when

it

is

program¬

med

to

zero

output.

It

can

also

be

used

to

correct

for

smalt

offsets

in

power

supply

response

to

programmed

inputs

when

the

59501A

is

used

as

a

power

supply

programmer.

3-12

The

D/A

FULL

SCALE

ADJUST

@

atlbws

the

59501A

output

to

be

adjusted

to

maximum

(±5%)

when

it

is

programmed

to

maximum.

For

example,

if

the

59501A

is

programmed

to

its

maximum

unipolar

output

in

the

high

range,

the

D/A

FULL

SCALE

ADJUST

is

normally

used

to

set

the

output

to

9.99V.

However,

it

can

also

be

used

to

set

the

output

between

9.49V

and

10.49V

(i.

e.

9.99V

±5%).

The

D/A

FULL

SCALE

ADJUST

is

used

when

the

59501A

is

employed

as

a

D/A

(see

paragraphs

3-75

through

3-82).

When

the

59501A

is

used

as

a

power

supply

programmer,

the

POWER

SUPPLY

FULL

SCALE

ADJUST

controls

are

utilized

to

set

the

power

supply's

output.

3-13

The

POWER

SUPPLY

FULL

SCALE

ADJUST

controls

(COARSE

and

FINE)

(s)

enable

the

user

to

set

the

maximum

output

desired

from

the

power

supply

when

the

59501A

is

programmed

to

its

maximum

value.

These

adjustments

can

be

used

to

calibrate

the

output

of

a

power

supply

to

its

maximum

rated

output

or

to

any

lower

value.

For

example,

a

40Vdc

power

supply's

output

could

be

set

to

20V

when

the

59501A

is

programmed

to

its

maxi¬

mum

vaiue.

In

this

case,

ali

999

programming

steps

are

utilized

in

programming

the

supply

from

0

to

20V

with

a

resolution

of

20mV

(approx.).

Calibration

of

power

supply

outputs

is

described

in

paragraph

3-53

through

3-59.

Figure

3-1.

59501A

Front

Panel

3-1

3-14

Rear

Panel

3-15

The

59501A

rear

panel

contains

the

HP-IB

connec¬

tor,

the

ADDRESS

switches,

the

UNIPOLAR/BIPOLAR

mode

switch,

the

ac

power

module,

and

the

output

term¬

inal

strip

as

shown

in

Figure

3-2.

a.

HP-IB

connector

—

Interfaces

directly

to

HP-IB

(paragraph

2-17).

b.

ADDRESS

switches

-•

Select

"listen”

address

of

59501A

(paragraph

2-22).

c.

UNIPOLAR/BIPOLAR

switch

—

Selects

either

the

unipolar

of

bipolar

output

mode

(para¬

graph

2-25).

d.

Ac

Power

Module

—

Contains

fuse

and

ac

input

voltage

select

PC

board

(paragraph

2-27).

3-16

The

59501A

is

interfaced

with

the

user's

device

via

the

output

terminal

strip.

Output

terminals

A1

and

A2

allow

access

to

the

59501

A's

D/A

output

while

terminals

A3

through

A5

allow

access

to

the

power

supply

program¬

ming

network.

Figure

3-3

illustrates

the

connections

re¬

quired

to

program

the

output

voltage

of

a

typical

HP

power

supply.

In

this

case,

a

jumper

is

connected

between

termin¬

als

A2

and

A3,

and

terminals

A1,

A4,

and

A5

are

connected

to

the

voltage

programming

terminals

of

the

power

supply.

TTie

method

of

programming

and

the

connections

required

to

program

the

output

voltage

or

current

of

various

HP

supplies

are

described

in

paragraphs

3-37

through

3-74.

When

the

59501A

is

used

as

a

low

level

dc

signal

source,

only

terminals

A1

and

A2

are

connected

to

the

user's

device.

Programming

instructions

for

this

application

are

given

in

paragraphs

3-75

through

3-82.

3-17

PROGRAMiVIIMG

FUNDAMENTALS

3-1

8

The

unipolar

or

bipolar

output

of

the

59501A

is

programmed

by

a

data

word

comprised

of

four

ASCII

characters

(digits)

received

in

the

order

shown

below.

The

first

digit

specifies

range

and

the

digits

specify

the

desired

output

within

the

selected

range.

The

range

digit

must

be

the

number

1

to

specify

low

range

or

the

number

2

to

specify

high

range.

The

magnitude

digits

can

be

any

number

from

000

to

999.

D1

D2

D3

D4

/

Range

Magnitude

1

or

2

000-999

3-19

The

59501A

automatically

provides

an

output

voltage

as

soon

as

the

four

digits

are

received.

This

output

is

retained

until

the

digits

are

received.

The

59501

A

is

programmed

by

the

magnitude

digits

in

BCD

to

produce

the

desired

output

voltage.

In

the

unipolar

mode,

000

equals

00.0%

of

full

range,

500

equals

50.0%

of

full

Figure

3-2.

59501A

Rear

Panel

Figure

3-3.

Rear

Terminal

Strip,

Typical

Connections

range,

and

999

equals

99.9%

of

full

range.

In

the

bipolar

mode,

000

equals

the

maximum

negative

voltage

output,

500

equals

OV

output,

and

999

equals

the

maximum

positive

voltage

output.

3-20

Calculating

Data

Word

Values

3-21

The

following

paragraphs

describe

the

data

word

value

calculations

required

to

program

the

output

of

the

59501A.

Similar

calculations

are

required

when

program¬

ming

power

supply

outputs

using

the

59501

A.

The

pro¬

grammable

output

range

depends,

of

course,

upon

the

power

supply

model

being

programmed.

The

desired

output

range

of

the

particular

power

supply

must

be

calibrated

for

pro¬

gramming

with

the

59501

A.

Power

supply

calibration

pro¬

cedures

and

sample

programs

are

described

in

paragraphs

3-53

through

3-74.

3-22

Data

word

value

calculations

for

the

high

(lOV)

and

low

(IV)

59501A

output

ranges

are

described

below.

Calculations

are

provided

for

both

the

unipolar

and

bipolar

output

modes.

Each

data

word

must

be

exactly

four

digits

3-2

long

(one

digit

for

range

and

three

digits

for

magnitude).

If

more

than

four

digits

are

sent

to

the

59501

A,

the

desired

output

voltage

will

not

appear

at

the

output.

3-23

Unipolar

Mode

3-24

Low

Range.

The

desired

59501A

output

voltage

values

are

from

0

to

0.999V

programmable

in

999

steps.

The

resolution

in

this

range

is

equal

to

.999V/999,

or

ImV

per

step.

To

calculate

the

correct

data

word

value

to

pro¬

duce

the

desired

output

within

this

range,

proceed

as

follows:

1.

The

resolution

in

the

low

range

is

ImV,

Let

D-

.001

2.

The

range

digit

is

1

for

the

low

range,

so

add

1

to

the

left

of

the

3

magnitude

digits,

Let

R

=

1000

3.

The

magnitude

portion

(M)

is

calculated

by

dividing

the

desired

output

voltage

(V)

by

the

least

significant

digit

D.

The

magnitude

portion

must

be

rounded

off

to

exactly

3

digits,

M

“

!NT

(V/D

+

0.5)

=

3

magnitude

digits

4.

Combine

range

and

rounded

off

magnitude

portion

to

obtain

the

correct

data

word

value

(N),

N

=

R

-i

M

Example,

desired

voltage

^

0.5123V

D

=

.001

R

-

1000

M

-

INT

(0.5123/.001

-t

0.5)

M

-

INT

(512.8)

N

-

1000

-f

512

N

=

1

512

=

data

word

value

In

this

example,

the

desired

output

voltage

is

0.5123

volts

but

the

actual

output

is

0.512V

because

the

resolution

is

ImV

(least

significant

digit

equals

.001):

V-

IVI

X

D

V-

512

X

.001

V

-

0.512

3-25

High

Range.

The

desired

59501A

output

voltage

values

are

from

0

to

9.99V.

The

calculations

are

the

same

as

for

the

low

range,

except

resolution

is

10mV

and

the

high

range

is

used.

For

the

high

range,

Let

D

=

.01

and

R

=

2000

3-26

Bipolar

Mode

3-27

Low

Range.

The

desired

59501A

output

voltage

values

are

from

—1V

to

+0.998V

programmable

in

999

steps.

For

a

—1V

output,

the

magnitude

digits

are

000

and

for

a

+0.998V

output,

the

magnitude

digits

are

999.

A

OV

output

is

obtained

when

the

magnitude

digits

are

500.

Resolution

in

this

range

is

equal

to

1.998/999,

or

2mV.

To

calculate

the

correct

data

word

value

to

produce

the

desired

positive

or

negative

output

voltage

within

this

range,

pro¬

ceed

as

follows:

1.

The

resolution

in

the

-1V

to

0.998V

range

is

2mV,

Let

D

=

.002

2.

The

range

digit

is

1

for

The

low

range,

so

add

1

to

the

left

of

the

three

magnitude

digits,

Let

R

=

1000

3.

The

magnitude

portion

(M)

is

calculated

by

adding

1

to

the

desired

negative

or

positive

out¬

put

voltage

(V)

and

dividing

this

sum

by

the

least

significant

digit

D.

The

magnitude

portion

must

be

rounded

off

to

exactly

3

digits,

M

=

INT{V-t1)/D

-r

0.5)

4.

Combine

range

and

rounded

off

magnitude

pot-

tion

to

obtain

the

correct

data

word

value

(N),

N

=

R

-t

M

Example,

desired

voltage

=

-0.5123V

D

=

.002

R

=

1000

M

=

INT

(-5,123

+

1)/.002

-tO.B)

IVI=

INT{-t0.4877/.002-r0.5)

M

=

INT

(243.85

+

0.5)

M

-

INT

(244.35)

N

=

1000

+

244

=

1244

In

this

example,

the

desired

output

voltage

is

—0.5123V

but

the

actual

output

is

-0.512V

because

the

resolution

is

2mV

(.002):

V=

(Mx

D)

-1

V=

(244

X

.002)

-

1

V

=

0.488

-

1

V-

0.512V

3-28

High

Range.

The

desired

output

voltage

values

are

from

-1

OV

to

+9.98V.

Calculations

are

similar

to

those

for

the

low

range,

except

resolution

is

20mV

on

the

high

range,

and

10

must

be

added

to

desired

positive

or

negative

output

voltage

in

order

to

calculate

the

correct

magnitude

digits.

For

this

range,

the

equation

for

the

magnitude

portion

(M)

of

the

data

word

value

is:

M

=

INT{{V

+

10)/D

+

0.5)

Example,

desired

voltage

=

-5.123V

D-

.02

R

-

2000

M=

INT

{(-5.123+

10)/D

+

0.5)

M=

INT

(243.85

+

0.5)

M

=

INT

(244.35)

-

244

N

=

2000

+

244

=

2244

In

this

example,

the

desired

output

voltage

is

-5.123V

but

the

actual

output

is

-5.12V

because

the

resolution

is

20mV

(.

002

):

V-

(M

X

D)

-10

V-

(244

X

.02)

-

10

V

=

4.88

-

10

V

=

-5.12V

3-3

3-29

Sending

Data

Words

3-30

Before

a

data

word

is

sent,

a

command

must

be

issued

establishing

the

controller

as

the

"talker"

and

the

59501

A

as

the

"listener".

The

following

examples

assume

that

the

controller

(9830A

or

9825A

calculator)

has

been

assigned

its

standard

talk

and

listen

ttddresses

of

"U"

and

"5"

respectively,

and

the

59501A

has

been

assigned

a

listen

address

of

"Sr".

3-31

Example

1

illustrates

a

command

statement

(9830A

calculator)

containing

the

proper

talk

and

listen

addresses.

The

statement

includes

the

constant

data

word

value

”1250"

which

is

sent

to

the

59501

A.

Example

1.

Sending

a

Constant

Data

Value

(9830A

Command

Statement)

59501

A

Listen

Address

Calculator

Talk

Address

Uniisten

Command-

CMD

"?U&",

"1250"

'I

icii

lyc;

Magnitude

Digits

Data

Word

3-32

Example

2

illustrates

a

command

statement

issued

by

a

9825A

calculator.

Note

that

in

addition

to

the

calcu¬

lator

Talk

address

"U”and

the

59501A

listen

address

the

address

code

of

the

HP-iB

Interface

Card

{98034A)

m.ust

be

included.

It

is

assumed

that

the

interface

card

has

been

assigned

its

standard

select

code

of

"7".

The

9825A

command

statement

also

includes

a

constant

data

value

of

"1250"

which

is

sent

to

the

59501A.

Example

2.

Sending

a

Constant

Data

Value

(9825A

Command

Statement)

59501A

Listen

Address-

Calculator

Talk

Address

Uniisten

Command-

98034A

Select

Codt

1

cmd

7,

”1250”

flange

Digit

Magnitude

Digits

end

of

the

write

statement.

Suppression

of

the

carriage

return/line

feed

codes

is

essential

when

programming

the

59501

A.

If

they

are

not

suppre^ssed,

they

will

be

processed

as

data

characters

by

59501A

resulting

in

an

undesired

output.

Example

3.

Sending

a

Constant

Data

Value

{9825A

Write

Statement)

-Suppresses

CR/LF

Codes

0:

fmt

1,

c,

^

1:

wrt

706.1.

"1250”

98034A

Select

Code

59501A

Address

3-34

Command

statements

can

only

be

used

to

send

data

cortstants.

Output

(9830A)

or

write

(9825A)

statements

can

also

be

used

to

send

data

constants

but

miist

be

used

to

send

variables.

3-35

Example

4

illustrates

how

an

output

statement

{9830A)

is

used

to

send

variable

data

to

the

59501A.

This

example

includes

a

command

statement

(line

100)

enabling

the

9830A

to

talk

and

the

59501A

to

listen.

However,

the

variable

data

that

will

be

sent

to

the

59501A

is

included

in

the

output

statement

(Hik;

120).

In

line

120,

13

specifies

the

HP-IB

interface.

Variable

N

can

be

any

number

from

1000

to

1999

or

from

2000

to

2999.

if

the

variable

were

equal

to

1250,

Example

A

would

program

the

same

output

as

Example

1.

Note

that

in

Example

4,

line

110

uses

format

specification

F1005.0

and

line

120

ends

in

a

semi-colon.

The

FI

005.0

format

specification

deletes

leading

spaces

from

the

output

data

item

and

specifies

a

field

width

of

four

digits

{space

for

+

sign

is

suppressed)

with

no

decimal

places.

The

use

of

the

semi-colon

(line

120)

suppresses

the

carriage

return/line

feed

codes

at

the

end

of

the

output

statement.

If

the

leading

spaces

are

not

deleted

and

the

CR/LF

codes

are

not

suppressed,

the

59501

A

output

will

go

to

an

undesired

value.

Example

4.

Sending

a

Variable

Data

(9830A

Output

Statement)

Data

Word

3-33

Example

3

illustrates

a

write

statement

(9825A

calculator)

which

can

also

be

used

to

address

the

59501A

to

listen

and

send

a

constant

data

value.

The

59501A

listen

address

of

corresponds

to

an

address

of

”06”

as

defined

in

the

9825A

General

I/O

ROM

manual

(09825-90024)

Chapter

4.

Note

the

format

statement

(line

0)

used

in

Example

3.

The

"c"

specifies

a

character

field,

while

the

”z"

is

used

to

suppress

carriage

return/line

feed

codes

at

the

100

CMD

'7U&"

110

FORMAT

F1005.0

120

OUTPUT

(13,110)N;

3-36

.

Example

5

illustrates

how

a

write

statement

{9825A)

is

used

to

send

variable

data

to

the

59501

A.

If

variable

N

in

line

1

were

equal

to

1250,

this

example

would

program

the

same

output

as

the

Format

specification

f4.0

deletes

leading

spaces

and

the

z

suppresses

the

CR/LF

codes

for

the

same

reasons

as

described

above.

3-4

Example

5.

Sending

Variable

Data

(9825A

Write

Statement)

0:

fmt

1,

f4.0,

z

1:

wrt

706.1,

N

3

37

USING

59501A

AS

A

POWER

SUPPLY

PROGRAMMER

3-38

Power

supply

programming

is

accomplished

using

the

digitally

controlled

output

voltage

of

the

59501A

in

conjunction

with

the

ZERO

ADJUST

and

POWER

SUPPLY

FULL

SCALE

ADJUST

controls

on

the

59501A

front

panel.

By

making

the

appropriate

connections

between

the

59501

A's

output

terminals

and

the

voltage

programming

terminals

of

a

dc

power

supply,

the

output

voltage

(or

cur¬

rent)

of

the

power

supply

can

be

programmed

from

7ero

to

the

full

rated

output.

This

method

of

programming

is

called

voltage

programming

with

gain,

3-39

Voltage

Programming

With

Gain

3-40

HP

programmable

power

supplies

have

certain

features

in

common.

These

features

include:

an

internal

reference

(either

a

fixed

regulated

voltage

or

a

fixed

regu¬

lated

constant

current

source),

voltage

and

current

compara¬

tors

with

their

input

terminals,

and

front

panel

controls

(voltage

and

current)

with

connections

at

the

rear

panel

terminals.

A

power

supply

can

be

controlled

by

making

the

appropriate

connections

on

the

rear

panel

and

applying

an

external

voltage

(or

in

some

cases

current).

For

example,

by

disconnecting

the

internal

reference

voltage

from

the

input

circuits

of

the

constant

voltage

comparator

and

replacing

it

with

an

externa!

voltage

source,

the

output

voltage

of

the

power

supply

is

programmed

by

the

value

of

the

external

voltage

source.

3-41

Figure

3-4

illustrates

the

method

by

which

a

power

supply’s

constant

voltage

output

can

be

programmed

using

an

external

voltage

with

a

voltage

gain

dependent

upon

the

ratio

of

Rp

to

Rp.

Note

that

this

method

is

no

different

from

the

circuit

normally

used

for

constant

voltage

control

of

the

output

except

that

an

external

reference

(the

pro¬

gramming

voltage

source)

has

been

substituted

for

the

internal

reference.

On

most

supplies,

external

terminals

are

available

so

that

the

connections

shown

in

Figure

3-4

can

be

accomplished

without

any

internal

wiring

changes.

In

ail

HP

remotely

programmable

power

supplies,

the

summing

point

S

is

made

available,

and

the

configuration

of

Figure

3-4

can

always

be

accomplished

using

the

external

programming

voltage

source

Ep

and

external

precision

wire-

wound

resistors

Rp

and

Rp.

(Rp

should

not

exceed

10k.)

As

indicated

by

the

equation

in

Figure

3-4,

Rp

can

be

selected

so

that

the

resulting

voltage

gain

is

either

less

or

greater

than

unity.

It

is

possible

to

use

the

front

panel

control

on

the

supply

as

the

voltage

gain

control

Rp.

Figure

3-4.

Voltage

Programming

with

Variable

Voltage

Gain

3-42

Constant

Voltage.

Figure

3-5

illustrates

the

con¬

nections

required

for

the

59501A

to

program

the

constant

voltage

(CV)

output

of

a

typical

HP

power

supply.

Note

the

similarities

between

Figures

3-4

and

3-5,

The

59501A

includes

Rp

(R76),

Rp

(COARSE

and

FINE

POWER

SUPPLY

FULL

SCALE

ADJUST),

and

Ep

(59501A

output

between

terminals

A1

and

A2),

The

extra

resistor

(R77)

between

Terminals

A5

and

A6

is

used

only

when

program¬

ming

power

supplies

above

300

volts.

3-43

As

shown

in

Figure

3-5,

the

supply's

internal

reference

voltage

(+Vppp)

and

VOLTAGE

control

are

disconnected

(dotted

lines)

and

are

replaced

with

the

59501

A's

output

voltage

and

POWER

SUPPLY

FULL

SCALE

ADJUST.

Note

that

in

the

unipolar

mode,

59501A

output

terminal

A1

is

negative

with

respect

to

A2.

This

polarity

must

be

complied

with

when

making

connections.

The

connections

shown

in

Figure

3-5

are

typical

for

m

o

s

t

supplies.

344

Constant

Current.

Figure

3-6

illustrates

the

connections

required

for

the

59501A

to

program

the

out¬

put

current

of

a

typical

HP

power

supply.

Programming

constant

current

consists

of

replacing

the

internal

reference

with

the

output

voltage

from

the

59501A

and

replacing

the

internal

CURRENT

control

with

the

POWER

SUPPLY

FULL

SCALE

ADJUST

controls

on

the

59501

A.

With

these

connections,

the

voltage

developed

across

POWER

SUPPLY

FULL

SCALE

ADJUST

(Rp)

becomes

the

reference

against

which

the

voltage

drop

across

the

output

current

monitoring

resistor

(R|^)

is

compared.

The

relationship

between

Ep

and

the

supply's

output

current

depends

upon

the

resistance

ratio

Rp/Rj^

and

on

the

constant

current

pro¬

gramming

coefficient

(Kp)

of

the

particular

supply.

The

relationship

between

input

voltage

and

output

current

is,

louT'^^P^

Rp)^9<pxFlRi

3-5

NOTE

TYPICAL

HP

POWER

SUPPLY

5950IA

Figure

3-5.

Typical

Connections

for

CV

Programming

Figure

3-6.

Typical

Connections

for

CC

Programming

3-45

59501A/HP

Power

Supply

Connections

3-46

Table

3-1

lists

the

HP

Power

Supplies

that

can

be

programmed

on

the

HP-IB

using

the

59501

A.

The

table

specifies

if

a

supply

is

capable

of

CV

and/or

CC

programming

with

the

59501A

and

also

lists

the

applicable

59501

A/power

supply

connection

diagram.

The

accuracy

of

a

power

supply/

59501A

combination

is

the

sum

of

the

59501

A's

accuracy

plus

the

accuracy

of

the

particular

power

supply.

59501A

power

supply

programming

accuracy

specifications

are

given

in

Section

I.

One

59501A

can

only

program

a

supply's

CV

or

CC

output.

If

it

is

desired

to

program

both

CV

and

CC

on

the

HP-IB,

two

59501A's

are

required

with

their

address

switches

set

to

different

addresses.

3-47

The

leads

(AWG

No.

24,

minimum)

connecting

the

59501A

to

the

power

supply

should

be

twisted

to

reduce

noise

pickup.

The

longer

the

connecting

leads,

the

more

noise

that

can

be

introduced.

Shielding

will

further

improve

noise

rejection.

After

completing

the

connections,

install

the

pro¬

tective

covers

over

the

terminal

strips

on

the

59501A

and

on

the

supply.

Table

3-1.

HP

Power

Supply/59501

A

Capability

Guide

59501A

Programming

Capabilities

Power

Supply

Model

CV

Figure

CC

Figure

6002A

Yes

3-7

Yes

3-12

6101A,

02A

Yes

3-7

No

—

6104A,

05A

Yes

3-7

Yes

3-13

6106A

Yes

3-7

No

—

61i1A-13A

Yes

3-7

No

—

6n4A,

15A

Yes

3-7

Yes

3-13

6116A

Yes

3-7

No

—

6177C,

SIC,

86C

No

—

Yes

3-14

6200B-03B

Yes

3-7

Yes

3-12

6204B-06B

Yes

3-7

No

—

6207B,09B

Yes

3-7

Yes

3-12

6220B,

24B,

26B

Yes

3-7

Yes

3-12

6227B,28B

Yes

3-7

Yes

3-12

6253A,

55A

Yes

3-7

Yes

3-12

6256B-6274B

Yes

3-7

Yes

3-12

6281

A,

84A,

89A,

94A,

99A

6282A,

85A,

86A,

90A,

Yes

3-7

Yes

3-12

91

A,

96A

Yes

3-7

Yes

3-12

6427B-6448B

Yes

3-8

No

—

6453A,

56B,

59A

Yes

3-9

Yes

3-15

6464C

Yes

3-10

Yes

3-15

6466C-6483C

Yes

3-8

Yes

3-15

6823A,

24A

Yes

3-11

No

—

6825A-6827A

Yes

3-11

Yes

3-16,

3-17

3-6

3-48

CV

Programming

Connections.

Figures

3-7

through

3-11

illustrate

the

connections

required

to

program

the

CV

output

of

the

applicable

power

supplies.

The

dotted

line

connections

represent

jumpers

which

must

be

removed.

All

other

jumpers

must

be

installed

as

illustrated.

Note

that

only

those

power

supply

terminals

pertinent

to

CV

program¬

ming

are

shown.

Complete

terminal

strip

details

are

pro¬

vided

in

the

appropriate

power

supply

Operating

and

Service

Manual.

Most

of

the

supplies

are

programmed

using

the

connections

illustrated

in

Figure

3-7.

The

specific

connec¬

tions

for

each

supply

are

tabulated

on

the

diagram.

3-49

Special

Protection

Circuit.

As

indicated

on

Figure

3-7,

some

of

the

supplies

contain

a

special

protection

circuit

which

must

be

considered

when

programming

with

the

59501

A.

The

supplies

affected

are

models

6256B

through

6274B,

6282A,

6285A,

6286A,

6290A,

6291

A,

and

6296A.

Down

programming

the

output

voltage

of

these

supplies

may

activate

the

special

protection

circuit.

When

this

occurs,

the

power

supply's

load

cannot

draw

more

than

10%

(approx.)

of

rated

output

current

until

the

protection

circuit

resets.

If

it

is

desired

to

program

the

output

voltage

down

to

a

lower

value

without

the

need

to

draw

full

output

current,

the

reset

time

is

not

important.

The

reset

time

can

take

from

500msec

to

6

seconds

depending

upon

the

particular

model,

the

load,

and

the

starting

and

the

ending

voltage

values.

For

example,

the

actual

output

voltage

of

a

6264B

supply

takes

only

80msec

for

its

output

to

go

from

20

volts

down

to

.1%

(20

millivolts),

but

it

will

be

about

800

milli¬

seconds

before

the

circuit

resets

allowing

the

full

output

current

to

be

supplied

to

the

load.

Additional

information

concerning

this

protection

circuit

is

provided

in

HP-IB/

Power

Supply

Guide,

HP

Part

No.

5952-3990.

3-50

Special

Option

J30.

An

additional

circuit,

desig¬

nated

special

Option

J30,

is

required

when

CV

programming

models

6427B

through

6448B

and

6466C

through

6483C.

The

Option

J30

circuit

is

a

voltage-to-current

converter

and

is

required

because

the

59501A

is

essentially

a

constant

voltage

source.

The

above

supplies

utilize

current

sources

in

their

programming

networks.

The

programmable

0

—

10V

output

of

the

59501A

is

connected

to

the

Option

J30

input

terminals

(

■

+

■

and

~)

on

the

rear

of

the

supply

as

shown

in

Figure

3-8.

One

characteristic

of

the

J30

converter

is

that

if

its

input

is

open

circuited,

the

output

of

the

power

supply

will

rise

to

about

25%

of

its

rating.

With

the

59501Acon-

nected,

the

open

circuit

condition

is

prevented

because

a

protection

circuit

in

the

59501A

presents

a

low

impedance

to

the

J30

input

when

ac

power

is

removed

from

the

59501A

(see

paragraph

4-13).

3-51

If

the

Option

J30

power

supply's

front

panel

VOLTAGE

controls

are

left

connected

in

the

circuit,

they

must

be

set

to

maximum

resistance

(fully

CW).

if

they

are

rotated

CCW,

the

output

of

the

supply

will

be

decreased

for

all

programming

voltage

received

from

the

59501

A.

As

indicated

on

Figure

3-8,

the

user

may

disable

the

front

panel

VOLTAGE

controls

and

connect

the

59501A's

POWER

SUPPLY

FULL

SCALE

ADJUST

in

their

place.

Refer

to

the

applicable

power

supply's

Operating

and

Service

Manual

for

additional

connection

information.

NOTE:

The

dotted

line

connections

represent

jumpers

which

must

be

removed.

All

other

jumpers

must

be

installed.

MC®EL

NO.

VOLTAGE

PROG

TERMS

REMARKS

A

8

C

6002A

A3

A2

Al

IF

THE

6002A

IS

EQUIPPED

WITH

OPTION

001,

MODE

SWITCH

ON

6002A

MUST

BE

SET

TO

CC

OR

LOCAL.

6!C«A,02A,

06A

A4

AS

A6

REMOVE

JUMPER

BETWEEN

AS

AND

-S

(POWER

SUWLY

TERMINAL

AS

IS

NOT

SHOWN

ON

THE

CONNECTION

DIAGRAM!.

PRECISION

POWER

SUPPLIES

;

ACCURACY

IS

SIGNIFICANTLY

REDUCED

WHEN

PROGRAMMING

WITH

5950IA.

6104A,06A,I4A,I5A

A2

Al

A3

PRECISION

POWER

SUPPLIES'.

ACCURACY

IS

SIGNIFICANTLY

REDUCKI

WHEN

PROGRAMMING

WITH

5950IA,

6IIIA,l2A.l3A,i6A

A4

AS

A4

REMOVE

JUMPER

BETWEEN

AS

AND

-S

(POWER

SUPPLY

TERMINAL

ASS

NOT

SHOWNCN

THE

COTiNECTION

DIAGRAM).

PRECISION

POWER

ajPFLlES-

ACCURACY

IS

SIGNIFI¬

CANTLY

REOJCED

WHEN

FRGMNG

WITH

59501A.

6200®.

04B.O58,

06B,20B

A7

A6

A8

DUAL

RANGE

UNITS

FHOTJT

PANEL

RANGE

SWITCH

MUST

BE

SET

TO

DESIRED

CEERATING

VOLTAGE.

ALSOACAPACITOR

IS

RESOIRED

BETWEEN

TEHMWALS

A6

AND

-S

TO

MAINTAW

F»F®

PERFCRMANCE.

FEFER

TO

APPLICABLE

0

a

S

MANUAL

PARTS

LIST

AND

U^

THE

SAME

VALUE

FOR

THE

CAPACrTOT

AS

IHAT

LISTED

FOR

Cl.

620IB.02B.03B.078,208,

2'«.26B,53A,

SSA.BIA,

B4A

89A.94A,99A

AT

A6

AS

A

CAPACITOR

IS

REQUIRED

BETWEEN

TER¬

MINALS

A6.ANO

-S

TO

MAINTAIN

PARD

FER-

FCWMANCE,

REFER

TO

AFRJC/^LE

0

a

S

MANUAL

PARTS

LIST

AND

USE

THE

SAME

VALUE

Kfi

THE

CAPACITOT

AS

THAT

LISTED

FOR

Ct.

62098

AT

A6

U

rOR

MODEL

6209B

(3Z0V

OUTPUT)

CONNECT

-S

TO

TERMINAL

A6

ON

THE

99S0IA

INSTEAD

3F

TERMINAL

AS.

Al.SO

A

CAPACITOR

IS

RE¬

QUIRED

BETWEEN

TERMINALS

A6

AND

-S

TO

MAINTAIN

PAfC

PERFORMANCE.

REFER

TO

APPLICABLE

0

a

S

MANUAL

PARTS

LIST

AND

JSE

THE

SAME

VALLE

FOR

THE

CAPACITOR

AS

THAT

USTEO

FOR

Ct.

6227B,2ee

Al

A?

S

A

SuF

CAPACITOR

AND

A

24fl

RESISTOR

(CONNECTED

IN

SERIES

BETWEEN

TERMIN/U.S

A2AND-S)

ARE

REQUIRED

TO

MAINTAIN

PARD

PERFORMANCE.

SEE

622TB/6228B

0

a

S

MANUAL

FOR

WIRING

INSTROCTKWS.

62S6B,S9B,60B,6I8

,63B,

646

,65S,666,67B,68B,

69B,7I8,74E

A3

A2

Al

THESE

SUPPLIES

CONTAIN

SPECIAL,

PRO¬

TECTION

CIRCUITS

WHICH

MUST

BE

CON¬

SIDERED

WHEN

PROGRAMMING

WITH

THE

6282A,85A

,86A.90A,

9

lA

,96A

A5

A4

A3

69B0!A

(SEE

PARAGRAPH

3-49)

3-7

Figure

3-7.

CV

Programming

Connections

for

HP

Power

Supplies

with

+S

Common

NOTE:

The

dotted

line

connections

represent

jumpers

which

must

be

removed.

All

other

jumpers

must

be

installed.

HP

POWER

SUPPLY

..

64496,6464C

-6485C)

CURRENT^

(PROGRAMS

OUTPUT

VOLTAGE

OF

SUPPLY)

«

OPTION

J30

PC

BO

<V0LT/W5C-

TD-CUR'

RENT

CON¬

VERTER

*

FACTORY

INSTALLED

SPECIAL

OPTION

(J30)

REQUIRED

ON

POWER

SUPPLY

(SEE

PARA

3-50)

4»MAY

BE

USED

IN

PLACE

OP

POWER

SUPPLY'S

VOLTAGE

CONTROL

[zero

/^u

u

st

)

(4)^

(Ep)|

A2

Figure

3-8.

CV

Programming

Connections

for

HP

Power

Supply

Models

6427B-6448B

and

6466C-6483C

HP

POWER

SUPPLY

6464C

**

HP

PCW^

SUPPLY

6459A)

CV

COMPARISCW

AMPLIFIER

-REF

S

/

rZERO'AOJuSTl

?

(41

A

2

(Ep)

A

3

I

(RrI^RTB

[toar||]__

(Rp)

diNl

•

Figure

3-9.

CV

Programming

Connections

for

HP

Power

Supply

Models

6453A,

6456B,

and

6459A

BIPOLAR

POWet

SUPPLY

AMPLIFIER

(SEE

TABLE

BELOW)

JUMPER

(R7)

CV

^

COMPARISON

AMPL

['Ter

o

adjus

t]

?

(-1

(

+

)

AE

(

A7

R76

_&4

[coaTse

oAPSEl

SUPPLY

(Rp)

I

FULL

__

I.

^

SCALE

[EMI

ADJUST

±L^

-

(4)

A2

(Ep)

(Rr):

R76

K

INTERNAL

JUMPER

(DESIGNATED

R7

ON

SCHEMATIC

IN

6464C

0

a

S

MANUAL

)

MUST

BE

REMOVED.

¥¥:

VOLTAGE

PROGRAMMING

WITH

UNITY

GAIN-6464C

OUTPUT

VOLTAGE

VARIES

IN

A

I

TO

1

RATIO

WITH

5950IA

PROGRAMMING

VCX.TAGE.

Figure

3-10.

CV

Programming

Connections

for

HP

Power

Supply

Model

6464C

MODEL

NO,

AMPLIFIER

INPUT

TERMS

REMARKS

A

B

6823A,24A

CS

IN

SET

FRONT

PANEL

M(X)E

SWITCH

TO

AMPLIFIER.

6825A,

26A,

27A

A2

A1

SET

FRONT

PANEL

MODE

SWITCH

TO

VAR

GAIN

AMP,

SET

RANt^

SWITCH

TO

DESIRED

OUTPLfT

RANGE.

Figure

3-11.

CV

Programming

Connections

for

Bipolar

Power

Supply

Amplifiers

6823A-6827A

3-8

HP 59501A Service manual

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