Hitachi 505 Operating instructions

:

--

-

j-

-a:

--5

-l

-1

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4't

HITACHI

ANALOG

COM?UTER

CO}ilIENIS

I

-

INTN,ODUCTION

II

-

THE

HITACHI

505

COMPIIIEH,

GENERAL

DESCRITTION

OF

HIIACH]

?age

4

SECTION

1.

2

ö

t/

t/+

2T

21_

21,

u

/ö

217

)"7

3/+

lQ

l+2

l*7

OIER,AT

ING

C ONSIDERAT

IONS

a.

?relininary

Operating

Considerations

b.

?re-Patch

Panel

Insertion

and

Removal

c. Amplifier

Balance

d.

Changing

Computational

Components

MONII'ORTNG

AND

COIfIROL

a.

Output

Selector

SL-25A

"""""'

b.

Overload

Indicator

OL-25I

c. Digital

Voltmeter

DV-25L

d.

Multi-Range

Voltmeter

(in

the

Contror

Panel)

"

e.

Reference

Potentiometer

(in

the

Control

Panel)

f.

Mode

Control

(in

ttre

Control

?anel)

^ T nrnlrq

6.

h.

Slave

Switches

i.

Readout

Devices

(in

the

Control

?ane1) ........

j.

Function

Switches

'"""'''

k.

?ower

Switches

(:n

tne

Qontrol

Panel)

""""

POTENTIOMETERS ""''

""".."""

o?EFATTONAI

AI4PT,TFTER'

...........

"'"..""'

a.

General

Considerations

.."""..'

b.

505

Operational

Araplifier

DA-151

""

"

6.

QUA.RfER.SQUAFB

MULTIPLIER

EM-151

56

a.

MultiPlication

58

b.

Division

62

7

.

F'IJNCTION

CENERATORS

^ v2

pixed

Function

Generator

FG-151r-A

........"

4. ^

r

r^vq

ol+

ol

67

na

öJ-

QC

AO

b.

Log

X

Fixed

Function

n

Tni onnomctrie

Fixed

r r

rSvrrvrrrv

er +v

d.

Variable

Function

Ge

e. Variable

F\rnction

Ge

f:

Varlable

h:.nction

Ge

Generator

FG-155A

Functi-on

Generator

FG-153A

nerator

FG-15I

nerat,or

TG-j-52

nerator

FG-L57

.aaaa.

8. OOMPAnATORS

cP-151,

CP-I52

9.

rlEE

DToDES

FD-151

..

.

"

'

10.

TRANSIER

DELAY

ELE|'ENT

TD-151

" "

"

'

11,

AIJIOMATIC

OTERATOR

AO-151

T2.

MODE

CONTROL

PANEL

MC-f51

LL.

REFtrTIII\IE

OTERATION

a02

...aaaat'""tttt"'

SECTTON

IlI

-

MA]NTENANCE'

SB?ARATED

''HIIACHT

ANA],OG

COMPUTER

TROGRAM

MANUA-L'I

Will

EXPIA1N

thE

PTOgTAMM1Ng

technique

for

HIIACHI 5A5

Computer.

The

Manual

is

common

in

programmi-ng

for all

kinds

of

HIIACHI

Analog

Conputer.

a.aaaa

11

€_

-

Fi.nr'm

Itrri,rber

all

afa

2 2-1

2.2-2

2.2-3

2.2-/+

2.2-5

1.1-O

aary

2.3-t

/ 1-/

2.3-3

2.3-/o

aJ'')

aJa

2.5-/+

ILLUSTR.ATIONS

T itle

Typical

JOJ,

Front Vlew

Pre-Patch Panel, Modular Layout

Amplifier

with Six-Connector

Bottle-?lug

Providing

Feedback

DVM Front

View

Pre-Patch Panel

Insertion

Amplifier

Balance Control Locatj-on

Computer Component

Module Assignment

Areas

Removal

of

Conputing Module

Patching Block Replacement

HITACHI

505

Control Area

Readout

Panel

OC-151

Patching Block and DVMT A4

to

SEL

Patching

Qimnl

ifiaä

(nhamxtis

Of Reference

Potentiometer

Conneeting

Ar€a,

Rear

the

Comprting

Console

Potentiometer

Patching Unit

PT-151 and

?otentiometer

Panel fr-Z5t

Potentiometer

Schematic

Showing

ein

=

100

volts

Potentioneter

Loading

6O4 Pntantinmotp-

f'.i--rr.i*e crm-rified

SchematiC

)vJ

L v

Potenti-ometer Schematic

ea'rd

Conputer Diagram

Synbols

Operational

tunplifier,

Simplified

Block Diagrarn

Operational Arnplifier,

Simplified Schematic

and

Patching Block Layout

Summer Amplifier

Patching

Integrator

Patching

ard

Simplified

Block Diagrant

r_ l_l_

/ n-l

z.o-)

z.o-2

4ry1

2.7-2

2.7-3

adl

2.7-5

z.

/-o

<'.

l-ö

2.7-9

1.l-LU

a.l-!4

2.7-U

2.7-1_5

2.8-L

2.10-1

T-+^-e-!^, n---

j

l.i

er

rha

S,mnl

i

fi

ed SchemrtiC

Irtu=SIauut ru.rlJ!rLfsf 4Lq

ulrryrJJ!(

\rhht

tl

.te.]

\

taer

tlt.gram

r rut

ulPrre

c^,,-*:- ^

^i

-^,,.1 +

(innl

i

ni

a^

snr.anatic

uYuarrrlS

u, r!'rPrr

Mrr]tinlien Simnli].ia| R-l nnk llj2srnm

r-i

Dr*nhin''

1'1(! UIplfVt .

Jlllplrr vLaA!

a'l

411tr

L

, uu-

tlIIE;

R-l nnlr T lrrnrrl.

M'rl t.inl icati on

P^+^!.i-^

--Ä

c'ih-]

ified schenatic

lrurury*ru

r

auvrrrlr5 arrq

ulrrPf-

ni--.r ^j ^.^ D-+^r^j-.,

znd simn'l i

-ied

schemrtic

yf

v!-furt

r

4uurr!116

X2

FGrSimplified

Schematic

Block Diagran

X2

FG,

Patchlng arrd Simplified

Schernatic

Log X FG Patching

and Simplified

Schematic

Trigonometric

FG. Simplified

Schematic

and

patching

IJVUÄ

UAJVAU

sinX

Patching

and

Simplified Schenatic

cosX

Patching

and Simplified

Schematic

Pri nn i n'l o nf IIF|I

VFG

FG-151,

Si-nplified

Block

Diagram

and ?atching

H lnnr I a17^r1t

VFG FG-151,

Separate

VFG

Patching

VFG

FG-151, Combined

VFG Patching

Location

of

VFGI s

and VFG

setting

Sample

Output

Curve

Principle

of

VFG

TV-l-57

VFC FG-157,

Sin,plified

Bl-ock

Diagram and Patching

H I ^nr | ä1r^11t

Timer Operation

Comparator

Simplified

Schematic

and

Patching

Block

Layout

Fr.ee

Diodes

Schematic and

?atching

Block

T,ayout

Transfer

Delay

Elenent,

Simplified

Schematic and

patching

Block

Layout

I

l_v

L-,

I

q

!

l-t

It

h

hr

n

f-1,

f-{

f-r

f'-r

t'-t

n

f-l

fT

T

2.l-u-^z

2.f1-1

2.IL-2

2.I2-I

1.L)-L

1.

LJ-1

!1an9fer

Delay

Element,

Typical

patching

and

Simplified

Schematic

Äutomatic

Operator,

Simplified

Schematic

and

Block

Layout

Automatic

Operator,

Block

Diagrarn

for

Typical

Connection

and

patching

nlocklayout

Mode

Control

panel-

patching

Block

Layout

Timer

Panel

,

TM-25I

Timer

Operation

Patching

SECTION

]

IIüIRODUCTION

Many

scientific

problems

studied

today

i-n various

fields

involve

the solution

of

parbial or

ordinary

differential

equations.

It

is

the exception,

rather

than

the

ru1e,

that the

pr"oblerns adrnit'

exact'

analybic solutions.

The

modern

analog

computero zuch

as the Hltachi

505,

provides

a convenient

nethod

for

obtaining

numerical

solutions

to zuch

problems as

well

as

enabling

the scientist

to

study

the

effect

of

changes

ln

the

physical

system.

The

nethod

of

problem solution

in an

,nalog

computer

is

quite

sJmple.

The

conputer

i-s

used

to

ltbuildrr

an

electronic

analogy

which

obeys

the same

set

of

differential

equations

as

the

physical

problem

to

be studied. Once

this

nodel has

been constructed,

er;:eri-rnents may

1,.

\.^i'._1;.,...

!

i

be

performed

on this nodel

in

lieu

of experi.ments on

the

physical

system. Investigations

which might

be difficult

to carry out on

the

actual

system

becone

quite

feasible

with

this technique. For

exa^np1e,

a

ptrysician

may wi-sh

to study

the effeet

on blood

presfllre

in a cer-

tain

portion

of the brain in

the event

that a

patient

loses an ann.

It

is irnlikely

that this experiment

would

be

perfonned by

any mearls

other than

simu].ationl

Since

the analog

computer

rmodelsrr

the

problem'

each

problen

variable

corresponds

to, or is

analogous,to,

"

computer voltage: A"

1..1..

f

.

'

'...,

these

voltages

are readily

available for measurement,

instrumenti-on

is enployed

to

measur€

the

problen

variables

as in

an actual system.

Solutions

may be

continuously displayed

on

a readout

oscilloscopet

perma^nently

plotted

on a strip

chart

or

x-y

plotter,

or ni;merically

-1-

.|

evaluated

by

means

of

a

voftmeter

or digital

voltmeter'

The

detailed

steps

necessary

for

problem

solution

will

be

dis-

cussed

in detail

in

a later

section'

Briefly'

one

must

first

con-

strrrctamathematicalmodelforthesystemtobestudied.oftensuch

a model

is

not

avail-able.

rn

this

case,

there

are

anal0g

computer

:.-

techniques

available

for

generating

a model

fron

äeta'taken

from

the

physicalsystem.Thenexbstepi-nvolvestheconstructionofacomputer

nblock

diagram"

(an

array

of

summing

alnps,

integrators'

etc')

r^rhich

obeys

the same

differential

equations

as

the

systern

model'

This

dia-

gramisthenusedtoconnectcomputingelementsutilizingthepatchboard.

Sincethepatchboardmayberemovedfromthecomputerandanotherpatch.

board

inserbed,

it

is

not

necessary

to

use

computer

time

otherSthan

for

actual

comPutation.

Theproblemisnowreadyforcomputersolution..Aftermorrnting

the

proper

patchboard,

the

potentiorneters

(u?otso) are

set

to

corre-

spond

to

the

physical

problem

constants

'

The

computer

solution

is

now

obtained

by

pressing

the

rtcoMPUTElt

button.

?roblem

variabfes

may

then

be

observed

and

recorded

as

desired.

Additional

runs

may

be rnade

with

differentphysicalconstants,problernvariables,initialconditions'

^+^

Thisnarrualdescribesthecomputeroperationandprograrrrmingin

detail.Itshouldbeemphasisedthataknor^lledgeofelectricalengi-

rieeringisnot'necessarytosuccessfullyoperateananalogcomputer'

Theblockdiagranapproachusedinthismanualiscommoni.nnanyfields..

Themanualdescrlbesthegeneralcomprrteroperatingcontrolsfirst.

Thisisfollowedbyamodulebyrnoduledescriptionofeacht'blackboxn,

-2-

I

r

r-l

t-.

I

i

l-

t

I

ll

including

its input-output characteristics and

photographs of actual

n.fnh]rnrrÄ annno^tinnq

R:ein nroor:mmino i

c

ownl:ined in the nro-

y4vvttrt\JaLu

uullltEu

.

uaJru

*rrrlu

graJn

manual

at an introductory

level.

The

detailed

example

given

in

bhis

section

may

be

used

as a model for

the

userr s

particul-ar problem

co*. rrn

'in

*,ha mrnrrr'l

+'i+'1 a^

tlAhn-l-inr*.innqll

ovn] rinq tho enani:l

DVU 4P flMlE lll4llUaJt

UaUJsq

ö},PfrU4UrvllD

,

g^y!@frrp

urlu

pysvla!

features of

the

Hitachi

505

for more

adva.nced techniques.

It

incfudes

function

generation, transfer fr-mction simulation, md

partial-

dif-

ferential equation solution.

Helpful

suggestions for

the

use of

the

automatic

operation unit

in

optirnization

problems

and

the

Timer

and

Logic

Operations

board

in iterative

methods

is

also

included.

-3-

ri'110':

;T

j..j

:

'.

:

5

-C:i

T'.-rr"

1.

GEIiEIilI

DESCRITT]ÜIi

OT

HITAJ;{I

!05

The

Hitacb"i

5C5

1s

a meclii-un

size

rlesk-top

generai

purpose

analog

computer

having

a

wide

variety

of

applications'

This

computer

maybeinstalledinanyofficeorlaboratorywithoutspecialconsidera-

tions

as

to

power

or

temperature

control'

The

power

consumption

is

quitelo.lu,easilyhandledbynorrnalofficewiring.Sincethiscomputer

supplies

its

or^m

internal

operatlng

en'rironment

by

means

of

an

oven'

itdoesnotdependonanaccurat'eexternaltempera+'urecontrol'The

heatdeliveredtotheroombyther-rnititselfisaboutthes.ryneas

that

delivered

by

a

rnediutn

size

laboratory

oscilloscope

'

The

Hitac

hL

5A5

is

nodular

in

concept

with

solid

stat'e

components

used

throughout)f.

The

modular

arrangement

of

the

computer

permits

specialmachineconfigurationsdependingont.heuserlsrequirements.

The

componen-[

arraJlgement

allows

sirnplified

wiring.

color

coding

of

the

modules

aids

in

rapid

identification

of

elements

and

simplifies

wiring

checks.

The

conpu-cer

is

housed

in

two

cabinets

'

the

computer

main

frame

andthecontrolconsole.Theseunitsmaybeeasilyseparatedfor

transportation.Themaincomputerconsolecontainsthepatchboard

r^riththeassociatedcomputingcomponentsmountedinanovendirecti-y

behind

the

patchboard.

Beneath

the

patch

panel

is

a

panel

contai-ning

the

anplifier

overload

inoicators,

the

readout

addressing

system'

and

thecoefficientpotentiometerswiththeirassociatedindicatorlamps,

it

ulith

t,he

excePtion

voltage

rectifier

of

the

oscilloscoPe

tube

and

a

high

in if.

I

r

t

r

t

I

g

t

f-I

i

F

t

tr

lI

:I

-I

I

addressing

buttons,

and label

plates. A

control located

immediately

to

the

teft

of the

patchboard

operates

the motor drive

for removing

or replacing

the

patchboard. The

lower

panel of

the

main

computing

consol-e

is

tilted

toward

the operator

for

ease

of operation.

The

power

supply

for the

computing

elements

is located

in

thc

bottom rear

of

the

cabinet.

It

is easily

removed

for ser,rice

or

transportation.

The

control

consol-e

contains

the

control

panel,

t'he oscillo-

scope,

the iterative

operation

timer,

the

digital-

logic

rmit.

and

the

digital

voltmeter.

The

control

panel,

located

in

the

lower

right

hand

si,le

of

the

control

console,

contains

the manual

rnode

control-

s"ritches,

a

--altmeter,

the reference

potentiometer,

and

Some

external

tnrü

terminals.

Immediately

above

this

rmit is

a

three

channel

oscilloscope

with

electronically

generated scales.

The

digital

volt-

meter mormted

above

this oscilloscope

may

be

used

for accurate

potenti-ometer

setting

and sofution

readings. The

iterative

operation

timer, which may

be

used

for sequential

mode

control,

is

located

in

the lower left

corner

of the

control console. The digital

logic

unitt

mourrted directly

above

the timer module,

contains various

types of

I

patchable

logic.

NOTES:

1. Ti{E

DISPOSITION

CHANGED

SLIGHTLY

IN

T}IE LATER

PRODUCTS.

2. ONE MOFE

COI,{PUTTNG

CONSOIE

}JIAY

M

ADDED

TO

TIm

RIGHT

OF

TI{E

ABO]IE

COMPUTER.

FrGUm

2.L-L

TYPTCAT

505,

FRolflr

vEW

t

T

t

I

-A

;-E

l.tj

L:r

i

n

ft

H

fi

F

t

HA],F EQUTPPED

FIGUNS

2.L.2

PFE-PATCH

?ANEL MODÜLAR LAYOTIT

t-

FULLY EQUIPFED

2.

OMRATING

CONSIDENATIONS

The

HitachL

5O5

(F:-gure

2'1-1)

is

shipped

complete

with

all

components

in

place

except

porrer

supply

and

DVM'

Each

unit

is

com-

pletely

cafibrated

and

adjusted

at

the

time

of

manufacture

'

After

perforrning

the

sirople

installation

and

check

procedure

outfined

in

the

maintenance

marulal

,

md

connecting

the

unit

to a

suitable

polJer

sour€eo

the

computer

is

ready

for

operation'

The

current

hmiting

circuits

proi;ect

the

reference

supplies

andallactiveoperationalelenentsfromdamageduetoshortingt.o

ground,ortoeachother.Thusanerrantpatchingcorr'nection(short-

ingtheplusreferencetogroundforexample)wi]-lnotadversely

effect

the supplies

(output

current'

drops

to zero)

nor will

the

re-

ference

supply

fuse

blow.

In

addition,

the surface

of ?re-Patch

Panel

is

covered

with

coloured

plastic

plates

(except'

frarne

and

handles)

re-

clucing

shorting-out

of ha-nging

pat'eh

cords.

a.

?reliminary

Operating

Considerations

The

following

sreps

are recommended

prior

to

operating

the

Hitachi

505

to

prevent

possible

false

trouble

indications.

(f)

Ascertain

that

each

operational

amplifler

has

a six

connector

bottle

plug or a

combination

of

bottl-e

plugs

equal

to

a

six

connector

bottlepluE:properlyplacedandseatedasshowninFigure2.2_I.

This

provides

the amplifiers

r^rit,h

feedbaek

artd

prevent

them

from

overloading

during

the

problem solution.

L*

t

r

(

c

4

=t

(b)

srx-coIrr{EcTOR

BOTTLE-PLUG

FTGURE

2.2-L

AMPLIFIER

I^IITH SIX

CONNtrCTOR BOTTLE-IT,UG

PROV]DT{G

FEqDBACK

r\

r,_r

h

rir

l-]

llr

Ilr

DA-l51

-9-

DVM DV-251

(ttRAtto-votrtr

swrrcH ADDED rN LATER

ttoDEL)

DVM

ET

620

FTGURE 2.2-N

DVM

FROIfI VIEW

The

procedure

for

inserti-ng

and removing

the

pre-patch

panel

is

described

in Paragraph

2.b.

(2)

Patch

the

Digital

vortmeter

(nvru)

and multi-range

voltmeter

(wt)

to

the

selector

readout

system.

(see

Figure 2.J-2

and

?ara-

graph

2.c.

of

this

section

for

a

deseription

of

the

selector

system

nnonr*.i a- \

e)

Apply

power

to

the computer,

then

?ot

Set

mode will

appear.

rnitially the

overload

lamps of

the

operational

arnplifiers

r,rill_

light;

after a few

seconds

all

of

the

lamps

should

extinzuish.

(/r)

check the

vari-ous

suppry

voltages

of

the

computer.

All

power

supply outputs

are

eonnected

to

the

voltmeter

switch in

front

of

the

power

supply

through

appropriate

scaling

resistors;

the

check

may be

accomplished

simply and

rapidly.

(5)

Check

the plus

and

minus

referenee

DVM by

selecting

100

(red

for plus)

and

Paragraph

3.a.

(6)

Allow about

thirby

minutes

lrafln-up

time;

this

assures

that

the

computing

components,

(including

the

DVI'{ and

oscilloscope)

are

up

to

normal-

operating

temperature.

Ground

the

DW input

ter:nination

(designated

on

the

oc-151

FEADOIIT

?AliET,),

md confinn

the

reading

is

within

000.00 plus

or

minus

one

bit.

other

adjustment

for

DVM

will

be

necessary

according

to

Model

of

DVM,

for

DV-251,

the

zero

check

is

the

only

step necessary

to

assure thl

correct

operation.

(7)

rn

the

Por

SEf mode

of the

cornputer

(pon

sET

button

on the

con-

trol

pane1,

model

CT-25I

depressed), closed

relay contacts

prov:ide

a

feedback

cj-rcuit

for

the

operational

amplifier.

(see

paragraph

{

of

this

section

for

a more

detailed

description)

supplied

for

readout

on

the

1OO

(blue

for

rninus).

See

-11

-

This

feature

perrnits

the

removal

of

the

?re-Patch

?anel

to

balance

the

operational

amplifier'

However'

when

the

com-

puter

is

switched

from

POT

SET

to

any

other

mod'e

'

the

relay

contact's

open

and

the

circuits

as

patched

on

the

Pre-Patch

Parre}providesthefeedbackloop.Mornentaryamplifieroverload.

nay

rezult

during

the

relay

operating

time;

thus

to

eHminate

possibleerrorinthecomputersolutlon,theoperatorshouJd

always

sr^ritch

the

conputer

FESET

(depress

the

FESET

button)

or

Al,l,

FESET

(depress

Al,t

FESI

butt'on

for

nulti-mod'e

operation

only),

before

switching

to

the

COMPIJIE

or

REP

O?

nrode'

This

pennit

the

pot

set

relays

to

open

and

the

implifier

suruning

junctions

to

settle

before

starting

the

problem

solution'

There

is

no

actural

rraiting

period

required;

that

is'

tb

operator

may

depress

the

FESET

or

AJ'L

RESEa

button

and

then

inrnediately

depress

the

button

for

the

desired

mode'

This

sequence

of

operation

will

prevent

the

possible

momentary

over-

load

from

effecting

the

problem

solution'

b.

?re-?atch

Panel

Insertion

and

Removal

Tojnsertthe?re-Patch?anel'sett'helipont'helor^reredgeofthe

panel

in

the

quide

groove

(f:-gure

2'2-3)'

Push

the

top

of

the

panel

in

so

the

panel

is

verbical

until

the

panel

is

clarnped

autoroatically'

DepresstheENG(foTENGAGE)trrttononthelowerleftedgeofthe

cornputingconso].e.Thisbuttonproperlys"'täandfirnlyholdst,hePre-

?atch

?anel

in

position.

As

the

ENG

and

Drs

(for DrSENGAGE)

br:ttons

can

memorizetheoperatoraetion,itisnotnecessarytokeepthebuttonde-

pressedrrntilthepanelisloaded.IntheENGstate,aftertheparrelis

loaded,theparrelcannotberemovedrrnlesstheDlsbuttonispushed.

\

I

t-,

l''-t

th

FIGURE

2,2-3

PFE-PATCH

PANEL

TNSERTTON

_L3

-

ln the ENG

state

without

the panel,

the panel

can

not be

loaded.

This

feature

elimj.nates

the

possibility

of accidentally

engaging

or

dis-

engaging

the

Pre-Patch

Panel.

The

removal

of the

Pre-?atch

panel

is

essentially

the

opposite

of

inserbing

the panel.

Depress the

Drs

button,

and

depress the

levers

on

both

handle

of the panel.

Then

pult

the panel

towards

the

operator

upper

edge of the panel

first.

rt is

not necessary

to

keep

the panel

straight

by

hand

after

in-

serbing the panel

or

after pushing

the

DIS

button.

c.

Anplifier

Balance

The

d-c

operational

anplifiers

are chopper

stabilized

to

prevent

drift and resultant

errors

in the

conputer

results.

Drift

in an

am-

plifi-er

results

in

an output

voltage

(or

offset)

with

a

zero

inp-rt.

To elininate

offset,

the

arnplifiers

of the

505

are

balanced,

i.e.,

with

a bias

current

is

applied

to

the

amplifier

summing

j'nction

equal

and

opposite

to

any current

due

to

drift thus

placing

the

surnnring

junction

at

virtual

gror:nd.

Once

balanced,

drift in

the

amplifiers

is

el-iminated

automatically

by

the

stabilizer

circuit.

The

d-c

emplifj-ers

of

the

505

are

ertremely

stable

and

nornally

do

not

require

balancing

for periods

up to

several

months.

To assure

ac-

curacy

and

confidence

in the

computer

results,

it

may

be

desirable

to

check

the amplifier

balance

daily; this

check

can

be

made

rapidly

and

simply

since the

selector

system

and

voltmeter

are

used.

There

are two

types

of an,plifier

balance

in the

JoJ;

the

voltage

balance

check

and

current

balance

check.

usual1y,

only

voltage

balance

cheek

will

be

sufficient

for

each

amplifier.

The current

balance

check

j-s

necessary

to

reduce

integrator

drift,

but

the operator

need

not

check

t

I

t

(

I

:

,o

:

./

:

L

t

I

t

l

t

-

1/, -

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Hitachi 505 Operating instructions

Hitachi 505 Operating instructions

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