B+K precision 1602 Manuel utilisateur

SOLID

STATE,HIGH.VOLTAGE,

REGULATED

DCPOWER

SUPPLY

trIYNASCAN

COF|POF|ATION

CONTENTS

PAGE

SPECIFICATIONS 3

FEATI.JRES 3

INTRODUCTION 4

OPERATING

CONTROLS 4

OPERATING

INSTRUCTIONS 5

APPLICATIONS .....7

CIRCI.JIT

DESCRIPTION . . .I1

MAINTENANCE .....13

CALIBRATION.l3

FUSE

REPLACEMENT . .. .14

WARRANTY Cov-3

INPUT

VOLTAGE

4OOV

DCSUPPLY

Output

Voltage:

Output

Current:

Grrrent

LimitAdjust-

ment/Protection:

LoadRegulation:

Line

Regulation:

Noise

& Ripple:

IOOV

SUPPLY

Output

Voltage:

Output

Current:

Load

Regulation:

Line

Regulation:

Noise

& Ripple:

Protection:

6.3VAC

(Non-Adjustable)

Output

Voltage:

Output

Current:

Protection:

12.6V

(Non-Adj

ustable)

Center-Tap

Supply

Output

Voltage:

Output

Current:

Protection:

METERING

Voltmeter(2Ranges):

Milliammeter:

DIMENSIONS

(Overall);

NET WEIGHT:

SPECIFICATIONS

105

- I25VAC,

0 - 400V,continuously

vari-

able.

0 - 20OmA.

lOmA to 200rnA,continu-

ouslyvariable-sets

trip cur-

rent

toshut-down

supply

out-

put.

0.1%

athigh

end.

0.t%.

Less

than

lOmV

peak-to-peak.

0 - 100V,

continuously

vari-

able.

0 - 2mA.

lVo

Lessthan1OmV

peak-to-peak.

Current-limiting

resistance.

6.3V!57o,

full load; I IOVAC

primary.

3.5Acontinuous.

Thermal

circuit-breaker.

6.3V

!5%,fuII

load;

II0VAC

primary,

each

side

center-tap.

3.5A

continuous.

Thermal

circuit-breaker.

0to 400V

(400Vsupply

only),

!37o.

0to l00VDC

(100V

supply

only),!3%.

Range

selected

byswitch.

0to 200mA

(monitors

400V

supply

only),

t3%.

14-118"

x 3-7

8"x 10"

deep.

II lbs.

FEATURES

Fullysolid

state,

utilizing

integrated

circuits,

silicon

transis-

torsand diodes

andone

SCR.Among

the advantages

solid

state

construction

are

dependability,

warm-uf

time

orstabilization

delay,

ruggedness,

compact

size.

CurrentUmiting/Overload

Protection:

Protects

load and

instrument

against

overload.

Pre-settable

automatic

current

shutdown,

fully adjlstable

froml0rnAto 200mA

provided

on.the

B+output.

Resistive

limiting

protects

the

C-supply

andload.

The

6.3VAC

and

the

12.6{IAC

heater

windingdinb

loads

are

protected

byaresettable

circuit

breaker.

SimplifiedCunentShutdown

Setting:Permits

setting

B+

current

shutdown

point without disturbingexternal

load

connections

or output voltage

settings;

doesnot require

application

of shortcircuit to output terminals.

sirirply

press

thebutton

and

adjust

theCURRENT

SETcontroi

the

desired

setting

the

currentmeter.

O400V,

G200mA:Output

voltage

continuously

adjustable

over.entire

-rgnge

wjth gsingle

control;

norange

switching

required.

Fullyregulated

output

atall

levels.

G100V, G2mA: Output voltage

continuously

adjustable

gver.

entire rang€

with a single

control; indepehdently

tloating

output.

Canbe

used

independently

of the0400V

oglpgtorcan

usedwitheither

polarity

referenced

tothe

400V

output.

6.3VAC,

I2.6VAC

CT,

G3.5A: Independently

floating

sources.

Dual Meters:Allow B+ supply output voltage

and B+

supply

current

drain

to bemonitored

simultanebusly.

The

voltmeter

can

also

beswitched

to monitor

thebias

iupply

voltage.

Bothmeters

have

overloadprotection

to prevent

damagefromexcessive

one current Range:

Simplifies

current shutdown

setting

byrequiring

only

one

adjuitment.

TwoVoltmeter

Ranges:

0-400V

and

Gl00V ranges

for the

B+ andC: supplies

respectively

provide

maximu=m

resolu-

tionwith aminimum

effort to the

user.

Standby-DC

Switch:Disconn€cts

the

supplies

from

external

loads

without disturbing

voltage

or iurrent set-

tings.

Pilot-Lamp: Lights up to indicateat a glance

that the

supply

on.

Mechanical

he-Regulator:B+ supply rectifier voltage

increased

in progressive

steps

asoutputis increasea.

inis

improvesefficiency

lesspower

is converted

to heat

low

voltage

output.

Floating

outputs: Permit

referencing

thepositive

or nega-

tive outp_uls

of the

-B+ supplyandthe C- supplyto any

external

DCpotential

orgrounds.

Reverse

?olarity hotection: Prevents

against

accidental

damagefrom reversepolarity connections

to an external

power

source.

Attractive, Functionaltlesign: Permits

stacking

of units

when

than

one

power

supply

isrequired. -

E"ry t9.Ope_rate:

All controls

are

identified

andeasy

rgad-Simplified

operation

helpsprevent

operator

mistakes

thatmightdamage

equipment.

The B & K PrecisionModel 1602 High Voltage Power

Supply is a versatile,

laboratory quality instrumentwhich

pr6vitiesregulated

DC voltages

and currents

of 0-400V at

bZOOmn and G100V at G2mA; and AC voltages

and

currents

of 6.3 and I2.6VAC at 0-3.5A.

The highperfor-

mance, operating ease,and special featuresmake it an

excellent

^choice-

for most applications requiring a high

voltage DC power source.

It is well'suited for,powering

fully-solid siate circuits, tube type circuits,.

andhybrids.

Unlike somesupplies,

the usercan rectify the AC.source

and

have

3 indefendentsupplies

for poweringdigital/analog

circuits,

etc.

Following is a list of some

of the most popular applications

of 1602:

oServiceTechnicians: Poweringhigh voltage solid state

equipment, or individual circuits consistingof transis-

tors,

vacuum

tubes

or both.

oFactory Technicians: Powering complete equipment

or individual assemblies

during testing in the factory.

Engineers

and l:boratory Technicians: Poweringpro'

totypesand

experimental

equipment.

oElectronics Instructors and Students: Laboratgry ex-

perimentsin basicandadvanced

electronics.

CONTROLS

14 12 11

Fig. 1. ControlsandIndicators.

INTRODUCTION

OPERATING 8

CURRENT METER. Measures

actual B+ output load

current duringnormal.operation.

IndicatesBt current

limit whenset/resetswitch 3 ispustred.

B+ CURRENT SET. Providesadjustment of B* cur-

rent limit. Continuously adjustable from l0-200mA

output current.

B+ CURRENT

PUSH

TO SET

ANDRESET

(SET/

RESET)BUTTON:

When

fully depressed

and

held,

connectscunentmeter

1 foreadtheB+current

limit

setting.

When

pressed

andreleased,

resetsB+overload

circuitif it hasbeentripped.

OVERLOADINDICATOR (RED). Lights when B+

current

limit has

been

exceededand

theB+zupply

has

strutdown.

STBY ON. STBY position: Removes

power from

terminals

8, 9, 13,and

14, and voltmeter10, but

leavesthe DC suppliesactivatedand at standby

condition.ON posifion: Appliespower to oirtput

terminals

8, 9, 13, 14,and

voltmeter10.

6. POWER.

Ughts continuously

whenpower supplyis

turnedon.

7. TERMINAL. Earthand

chassis

groundterminal-

B+ TERMINALS

8. +TERMINAL. Positive

polarityof B+output.

9. -TERMINAL. Negative

polarityof B+output.

10.VOLTMETER.

Indicates

output voltage

of B+ or C-

srpplies.

ll. METER

RANGE.

B+/G400

position:

Selects

full scale

ranse

of400volts

forvoltmeter

tometer

$+output

vollage.C-/G100

position:

Selects

full scale

range

100f forvoltmetei

tometer

C-

output

voltage.

12. LEVEL (B+).Turns off power supplyat extreme

counterclockwise

rotation.

Clockwise

rotationturns

powersupplyandadjusts

B+outputvoltage

upwards.

B@e

C-TERMINAI,s

13.- TERMINAL.

Negative

polarity

odtput

of C-supply.

14.+ TERMINAL.

Positive

polarityoutput

of C_

supply.

15.C- CONTROL.

{,{gsts C- outputvoltage

between

terminals

13 and 't4 from

0 to-100V

witf,clockwise

rotation. Output voltage

is monitoredon Volt-

meter

10 when METER RANGESwitch

1l is in

C-lGl00V

position.

16.

& 17.6.3VAC

TERMINAIS. 6.3VAC output rer-

minals.

Protected

breaker

16.& 18. 12.6VAC TERMINALS. l2.6VAC output ter-

minals.

Protected

by breaker19

19. AC RESET.

Circuit

breaker

in serieswith terminal

protects

againstexcessive

overloads

between

terminals

16,17

and

16,18.

NOTE: At17 and186.3VAC

is available.

This

output

protected by an internal fuse. For maximum

convenience

and minimum down-time due to

accidental

short-circuits

use

the

breaker-protected

outputs

16 , 17 and16, 18.

OPERATING

l. Turn off the power supplybefore

plugging

it into an

AC outlet, by rotatingthe LEVEL control 12 fully

counterclockwise,

until it "clicks" off.

2. Connect

the power

cordto a 105-125

volt 60Hz AC

outlet. WARNING

INSTRUCTTONS

(b) Push

the SET/RESET

3 button in andadjust

the B+ CURRENT

SET

2to atleast

50mAon

CURRENT

METER

1 if not already,

and

reset

to thedesired

currentlimit.

the SET/RESET

3 button andreturn

STBY/ON

5to ONpostiition..

If an overloadin the circuitry being powered

exists,

the supply

will shutdown

normal.

At very low output currents,

decreasing

the B+

output voltage between l50V to 400V may

activatethe QI-VCE sensing

circuit before the

desired

B+output isreached

on VOLTMETER

10.

The supply will shutdown and the OVERLOAD

lamp 19 will light. To reset, simply proceedas

stated

in (a),

(b),and

(c)above.

5. Connect

the.

powe_r

supply

output to the device

being

powered

with test

leads

asfollows:

a. connect th9 positive

polarityhigh voltage

input of

the device

being

powered

to the(+) teririnaf 8 of

theB+supply.

b. Connect

the negative

polarityhighvoltage

input of

the device

being

powered

to the(-) terminaf g of

the

B+supply.

c. If thepositive

polarity of the device

being

powered

is to be

^the ground reference,

j_lrmpei

the

(+)

terminal 8 to the

ground

terminal 7 .-

If the negative

polarity of thedevice

being

powered

is to be^the ground reference,

conneJt^

the o

terminal 9 to the

ground

terminal

If neither

thepositive

or thenegative

polarityinput

of the device

being

powered

needs

to begrouniled

but the chassis

of the deviceneedsgrounding,

connect

a separate

testlead

from the chassis

of the

device

to theground

terminal 7 of the B+ supply.

d. Follow the.aboveprocedures

for the C_

supply,

u.silg^plus (+) terminal 14 and minus (-) teiririir_

13. NOTE

Ih.r C- -supply and the B+ supply are entirely

independent

of each

other.

When

aiircuit requires

a.bias

voltage

which

isnegative

with respect

to the

circuit reference,

the (+) terminal 14-of the C-

supply

isconnected

to this

reference.

Refer

to Fie.

e. Connect the AC voltage sources(termin_

als 16 , 17 andlor 1G

, 18lto the device

if ;;_

quired.

a. Use

only a polarized

3-wire

outlet.

This

assures

that thepowersupply

chassis

connected

to a

good.earth.

ground and prevents

danger

from

electrical

shock.

lf a 2-wire

to 3-wire-

adapter

m_ust

be used,

be sure

the groundwire of the

adapter

isattached

to agood

earthground.

b.If acircuit under

test

requires

application

of a

fixed bias,always

apply the required

voltage

using

the_C-

supp-ly

first; before

applying

theIi'+

voltage(Step

6-d).

Turn gn-lhr_ qower supply by rotating the LEVEL

control 1Z slightly clockwise

past the-.,click". The

POWER

indicator 6 will light. -

Determine the maximum safe load current for the

device

to be powered

and setthe automatic

current

strutdown

for thatvalue

asfollows:

a. Push

and

hold theset/reset

bu_tton

3 and

adjust

the

B+ CURRENTSETcontrol 2 for thedesired

shut_

down current point as read on the CURRENT

meter 1 .

b. Release

theset/reset

button 3 .

c. Turn

-LEVEL (B+) control 12 to the desired

voltage.

d. If themaximumsafeload

current

isunknown.

start

with alow current

setting.

If thesetting

istoo low,

the overload

circuitwill trip when

pow6risapphed

to the loadin steps

6 and 7.lfio, increair'tf,.

current

setting in small stepsuntil the overload

circuitdoes

not trip during

normal

operation.

NOTE

In certain conditions of high-linevoltages

or B+

OUTPUT.

voltages

gre,ater

ihan 100V,-resetting

rygy.not be accomplished

by simply pushing

thJ

SET/RESET

3buttbn.

(Thisis

Oue

t6the

qr-"VCE

sensing

circuitry

described

under

CURRENT-VCE

SENSING

CIRCUITS,

page

13.)

Should

this

occur

proceed

follows:

(a) Set the STBY/ON

S switchto the STBY

position.

H6Bm"

Returnthe STBY-ON

Switch5 to the ON position

and

setthe

output

voltage

follows:

a. Set METER

RANGESwitch

to C-l0-

100Vwhen

adjusting

C-supply

output.

b. TurnC-

control 15 untildesired

voltage

reached.

Flg. 2. Typical VacuumTube Circuit Application.

lncrease

the strutdownpoint slightly with the

B+ CURRENT SET control 2 .lt the normal

load currentisunknown, thistechnique

maybe

used,but, if the current limit is already

set

for

the maximumsafe

loadcurrent,do not increase

thecurrentlimit further.

Check the bias setting to determine if it is

incorrectlyset.

(5) Refer

to NOTEunder

4d, Page

NOTE

Some equipment has a highly capacitiveinput,

which resultsin a surgecurrent when power is

initially applied.Whenpoweringsuch

equipment,

the overl,oadcircuit may activiate when the

STBY-ONswitch

isplaced

in theON positionwith

full operatingvoltagepreviously

set.If this occurs,

reduce the voltage setting before resetting the

overload and then bring the output level up

gadually to allow thecapacitors

in theequipment

to charge;

thiseliminates

thesurgecurrent.

c. If the power supply continues

to shut dodn at the

correct current setting, check the load circuits to

determine

thereason

for the overload.

d. To remove

power from the load without disturbing

the voltage or current shutdown settings,set the

STBY-ON

switch 5 to theSTBYposition.

e. Refer

to NOTEunder

4-d,

page

GTN

(3)

c. Set the METER RANGE switch 11

whenadjustingB+ supply

output .

d. Turn LEVEL control 12 clockwise

reached. until voltage is

NOTE

Whena fixed biasis requiredfor a circuit under

test, always

perform Steps

a and b first. (C- bias

level.)

7. If the B+ load current exceeds

the current shutdown

point, the overload lamp 4 will light, and the B+

supply will shut down (cunent meter 1 and volt-

meter10 will drop to zero).Restore

thepowersupply

to normaloperation

follows:

a. To reset the power supply, pressand releasethe

set/reset

button 3 . If the overloadwas intermit-

tent, thiswill restore

normaloperation.

b. If the overloadlamp remainslit, use one of the

following techniques before resetting the power

supplyagain.

(l) Reduce

theloadcurrent.

(2) Reduce the voltage slightly with the LEVEL

control 12 .

to B+/G400V (4)

General

This instrumentmay beused

to poweravastassortment

circuits and devices

in the fields of electronics

servicing,

electronicsmanufacturing,electronicsdesignengineering,

and electronics

education.

The l+ and C- supply outputs

are fully adjustable

over their full range,while the low

voltageAC iource remainsfixed. This flexibility makesit

suitable

for most applications

requiringasingle

or multiple

output highvoltage

supply.

PoweringTube Type Circuits

Fig.2 shows

the 1602beingusedto supplythe operating

voltagesin atypicalvacuum.tube

RF amplifierstage.

l. Connect

the filament of the tubeto terminals 16 and

17 for 6.3VAC heateroperation

or to 16 and 18 if

l2.6VAC heater

voltage

isrequired.

2. Connectthe grid resistorto the(-) terminal 13 of the

C-supply.

3. Connectthe (+) terminal 14 of the C- supply to the

(-) terminal 9 of theB+supply.

APPLICATIONS

4. Connectthe B+ lead to the (+) terminal I of the B+

supply to providepower for the plate and screen

grid

of thetube.

5. Connect

thecommon

lead

to the

(-)terminal 9 of the

B+supply.

Thispoint isalso

normallyconnected

to the

groundt6rminal-

7 , for strock

hazatdprevention.

The

ionnection between

groundand the (-) terminal 9 of

the B+ supply may not be used

during some

typesof

experimentJ,

such as positive grounds and floating

supplyinputs.

With the meterswitch

in theC-/G100V position,adjust

the

C-control for the desired

bias

level.

Before the S+ output voltage is adjusted,pressthe B+

currentset/reset

button andadjusttheB+CURRENTSET

control for the maximum output current desired.

Now the

S+ voltagelevel may be increased

to therequired

level-

the current overloadcircuit shuts down the B+ output,

either increase

the B+ current set, or decrease

the output

current drain by increasing

the C- output voltage.(Also

referto NOTE under4'D, Page

5.)

t-)

GIN

Vcc

g6:gB6Em"

SIG OUT

Fig. 3. Typical Triinsistor Circuit Application.

Powering

TransistorType Circuits

Fig. 3 shows

the 1602

PowerSupplybeing

used

to powera

transistof

amplifiercircuit.

l. Connect the Vcc lead of the circuit to the (+)

terminal 8 of theB+supply.

2. Connect the common lead of the circuit to the (-)

terminal 9 of the B+ supply and to the ground

terminal 7.

EQUIP},IENT

BEING

POWERED

In somecircuits

the

chassis

is connected

to thepositive

Vcc

line which meansthe groundterminalshouldbeconnected

to the (+) terminal 8 of the B+ supply.Fig. 4 shows

the

various methods to connect the 1602 to accommodate

different equipmentpower/ground

configurations.

If there

is any doubt which supplyleadis common to the chassis,

nodamage

will result

if aseparatelead

isconnected

from the

chassis

to theground

terminal 7 .

EQUIPI\4ENT

BEING

POWERED

Fig.4. Power

Supply

Output Situation.

Other Educational Uses

The student in an electronics

coursemay use the power

supply for powering equipment and circuits as

previously

described

for all other applications.In addition, thepower

supplycan be usedto conductexperiments

in fundamental

electronics.

In learning

Ohmslaw,for example,

therelation-

strips

of resistance,

voltageand current are easily demon-

stratedwith the supply.Beingableto observe

both voltage

and current simultaneously

is a geat aid in suchexperi-

ments. Fig. 5 shows some examples of the types of

experiments

that maybeconducted.

UsingTwo Suppliesfor Two B+ Voltages

Whrn two separate

B+ voltages

arerequired

simultaneously

for testingequipment, two supplies

may be used.

Setthe

voltage

andcurrent limit for each

supplyindependently

required by each load requirement. Only the circuit

reference

point mustbecommon

betweenthetwo supplies.

Fig. 6 shows

some

typical examples

of properpower supply

connections

when usingtwo units. Take extra precautions

to prevent reverse

polarity connections

in suchsituations.

The numerous connections can become confusing. Ad-

ditional colorsfor the test leadswill behelpful. The'power

suppliesare protected from reverse

polarity damagefrom

anexternalvoltage

source

suchasthe other powersupply.

Although two suppliesmay be used safelyin the above

situations, it is not recommendedthat the suppliesbe

operated

in series

for voltageshigher than 400V. Also, to

avoidshockhazards,

donot connect

both groundterminals

to the power supplyoutput terminals;

doing somay place

theentirepowersupply

chassis

at ahighpotential.

@oo

E@= cEl

E@e

OBSERVE

CHARACTERTSTIC OF DIODE

MEASURE

Vnt &

VARY

ETN

IMEASUREVot & I

VARY Etrv

OF ZENER DIODE

II{EASUREVVnt &

VARY Eru

OBSERVE

OHMS IJAII

^-T

BASIC CURRENT DIVTDER

rnr

^ -a>

*-.

12-tr*

#fu,

r1=

tr*

sfu;

11+12

tT*

Fig. 5. Typical Laboratory Classroom

Experiments

Usingthe 1602PowerSupply.

CHARACTERISTIC

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xtrlB

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tuz

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