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SAFETY

REGULATIONS

IEC

348

IEC

Clause

63

is

The

apparatus

described

in

this

manual

is

safety

class

1

(IEC

classification).

Accessible

metal

parts

which

are

connected

to

the

protective

earth

terminal

indirectly

are:-

The

cover

and

the

heat

sink.

64.1

2.

The

apparatus

has

been

designed

and

type

tested

according

to

IEC

Publication

348,

Safety

Requirements

for

Electronic

Measuring

Apparatus,

and

has

been

supplied

in

a

safe

condition.

The

present

instruction

manual

contains

information

and

warnings

which

shall

be

followed

by

the

user

to

ensure

safe

operation

and

to

retain

the

apparatus

in

safe

condition.

64.2

(a)

3.

If

the

unit

is

to

be

connected

to

the

main

supply

by

fixed

wiring,

rather

than

via

a

mains

plug,

then

the

protective

earth

wire

in

the

3-core

mains

lead

shall

be

connected

to

a

protective

conductor

before

any

other

connection

is

made.

64,3

(a)

4.

Before

switching

on

the

apparatus,

make

sure

that

it

is

set

to

the

voltage

of

the

mains

supply.

64.3

(e)

5.

Ensure

that

an

appropriate

mains

plug

is

correctly

connected

to

the

captive

3-core

cable

provided

with

the

unit.

Connections

are:-

brown

=

live,

green/yellow

=

earth

and

blue

=

neutral.

Then

ensure

that

the

mains

socket

to

be

used

has

a

correctly

connected

protective

earth

contact.

Do

not

use

extension

cords

without

protective

earth

conductors.

64.3

(a)

6

(a)

If

the

unit

is

to

be

used

with

live

measuring

or

load

circuits

which

have

protec-

tive

earth

terminals,

ensure

that

all

protective

earth

terminals

are

connected

to

a

pro-

tective

conductor

(the

front

panel

green

terminal

may

be

used

for

this

purpose)

prior

to

switching

on.

64.3

(e)

6

(b)

If

the

unit

is

to

be

used

with

live

measuring

or

load

circuits

which

do

not

have

protective

earth

terminals,

ensure

that

the

unit

mains

plug

is

inserted

before

making

connections

between

the

unit

output

terminals

and

such

circuits.

64.4

(a)

the

W

ARNING

(a)

Any

interruption

of

the

protective

conductor

inside

or

outside

the

unit,

or

disconnec-

tion

of

the

protective

earth

connection,

is

likely

to

render

the

apparatus

dangerous.

Intentional

interruption

is

prohibited.

64.4

(b)

(b)

The

output

of

the

power

supply

unit

is

fully

floating

and

it

may

be

used

in

series

with

other

power

supply

units

to

generate

high

DC

voltages

up

to

300V

DC.

Such

voltages

are

exceedingly

hazardous

and

great

care

should

be

taken

to

shield

the

output

terminals

for

such

use.

On

no

account

should

the

output

terminals

be

touched

when

the

unit

is

switched

on

under

such

use.

All

connections

to

the

terminals

must

be

made

with

the

power

switched

off.

64.5

(a)

8

(a)

Ensure

that

the

unit

is

disconnected

from

the

mains

supply

(switching

off

the

unit

by

the

front

panel

ON/OFF

switch

is

not

sufficient)

before

the

cover

is

removed

for

the

purposes

of

maintenance

or

setting

up

-

otherwise

dangerous

voltages

are

accessible.

Unless

unavoidable,

do

not

reconnect

the

unit

to

the

mains

supply

until

the

repair

is

complete

and

the

cover

replaced.

It

is

recognised

that,

for

fault

finding

and

setting

up,

the

mains

supply

will

require

reconnection

and

the

unit

will

be

switched

on

-

thus,

this

work

may

only

be

carried

out

by

a

skilled

person

who

is

aware

of

the

hazard

involved.

When

this

work

is

completed,

disconnect

the

mains

supply

before

replacing

the

cover.

11