IVAC Vital 4200C User manual

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FUNCTIONAL

DESCRIPTION

3.9.2

Battery

When

battery
and

Charger

the

instrument

charger

provides

on.

This

modulated

off.

current
measuring

Voltage
adjustable
set.

This
width

deposited
value.

this

pin

level

by

circuit

(0101),

leases

energy

C106

the

network

The

supplied

current

driving

For

would

the

voltage

15.

increasing

at

Cill

driving

signal.

smooths

limiting

the

feedback

divider,

reference

via

in

example,

cause

U101

the

C106.

and.

frequency-free

this

time.

of

23.4

lock

at

CPU

clock

to

the

injected

When

kHz

23.4
frequency,

CPU

clock,

into

Regulator

is

regulator

operating

is a switching

pass

transistors

L101

through

voltage

the

to

nominally

commutating

voltage

drop

consisting

is

through
allowing

voltage

R114

and

L101

Q101

to

pin

voltage

such

to

maintain

if

the

voltage

at

UlOl

pin

would

R113.

is

kHz.

then

energy

The

switching

When

runs

at

the

instrument

applied

The

stored

23.4

thus

alleviating

the

instrument

(figure

plugged

serves

power

regulator

stores

across

of

R112

R120,

is

15.

feedback

that

the

load

16

with

increase

the

instrument

about

to

Q105,

khz

the

3-25)

in

to

to

to

the

0101

energy

diode 08108

at

the

2

amps

R108

and

R119.

R121

the

output

derived

internally

an

appropriate

the

voltage

were

at

C106

regard

the

in

L101,

frequency

20

kHz.

is

turned

causing

frequency

switching

problems

by

the

an

AC

power

charge
instrument

based
and

when

output

maximum

the

battery
when

on a TL-494

0102

with a pulse

0101

when

side

is

at

pins 1 and 2 of

and

R122

voltage

from

pin

adjusts

amount

across

to

increase

to

decrease,

to

the

reference

pulse

Q105

width

thus

restoring

driving

is

turned

will

on, a differentiated

the

Q101

be

switching frequency

is a submultiple

regulator

caused

switching

by

regulator.

source,

it

is

turned

0101

of

L101.

accomplished

which

to

14

form

be

precisely

of

U101

the

of

energy

C106

at a constant

on

the

decreasing

driving

the

is

off,

the

turned

is

synchronized

asychronous

the

at

all

times

is

turned

regulator

width

on

and re-

is

turned

Output

by

UlOl

via

an

and

pulse

is

regulator,

also

voltage

0101,

voltage

determined

switching

off

at

pulse

of

the

noise

at

to

Q107

the

from

C102

is

charger

AC

is

turning
from

the

included

regulator

power.

drained

off

Q107.

system

to

When

by

When

ground

prevent

to

AC

power

the

regulator

Q107
and

the

ground

is

current

3-62

battery

when

is

disconnected,

and

off,

the

drain

from

the

CR106

regulator

draining

instrument

the

and

RIO1,

cannot

is

voltage

is

occur.

back

through

disconnected

across

effectively

disconnected

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FUNCTIONAL

DESCRIPTION

CIRCUIT

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SECONDARY

3.9.3

CR105

instrument

28
ground

battery

CRLO9
overvoltage
occur

Fuses

Two

tects

the
fuse,
direct

blocks

VDC,

circuits

protects

if

(figure

fuses

against

power

protects

short

the

connected

causing

charger

the

in

case

0101

were

3-25)

are

in

a

distribution

the

to

battery

to

CR106
for

regulator.

fault

ground

U101

battery

of

shorted.

the

battery

to

battery

in

voltage

AC

power,

conduct,

and

and

failure

the

system

and

from

3-64

from

the

biasing

associated

the

rest

of

the

circuit.

power

the

regulator

in

the

associated

battery.

reaching

voltage

circuitry;

of

regulator,

F101, a 2.5 amp

instrument.

C102.

at

C102

0107

on

the

instrument

such

or

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F102, a 5

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FUNCTIONAL

DESCRIPTION

3.9.4

3.9.5

Battery

CR107,
0101
the
Q103

R107,

Charge

0103,

collector,

switching

will

illuminating
thermometer
logic

that

Battery

The

1,

tors.

the

resulting

larly,

LO

the

Status

battery

2,

and

If

junction

if

junction

causing
from
the

voltage

U106

U104 pins 2 and 4 are

logic/analog

at

reference

C115,

ment

setting

(figure

Indicator

C105,

regulator

be

turned

board.

to

port

instrument

Monitor

condition

14.

VRIOl

the

battery

of

in

U106

the

battery

of

R144

pin 2 to

the

junction

voltage.

flip-flop

3-28).

R106,

indicating

on

in

the

charge

This

U40

on

is

operating

(figure

is

provides

voltage

R145

and

pin 1 going

drops

and

R145

go HI

board.

This

(figure

and

C107

that

is

functioning,

this

indicator

also

turns

the

logic/analog

monitored

a
drops

R146

will

HI,

below

will

and

monitored

If

the

of

R143

causes

U103

pins 4 and

3-26)

detect

the

instrument

case,

supplying

on

on

AC

3-27)

by

reference

below

drop

and

11.5

drop

below

U104

pin 2 to
by

voltage

and

R144

U106

pin

the

thus

LED

Q104

board,

power.

three

voltage

11.6

below

U104

volts,

the

the

drops

will

14
10,

switching

is

plugged

charging

current through

on

the

display/

through

R109

signaling

comparators,

to

the

volts,

the

reference

pin 4 going

the

voltage

reference

go

LO.

CPU

through

below

to

drop

go

11.4

below

LO,

disabling

waveform

in

and

the

battery.

to

send

the

U106 pins

compara-

the

voltage

voltage

LO.

Simi-

at

the

voltage

The

signals

port

U40

volts,

the

discharging

the

instru-

at

a

CPU

at

on

the

C115

and

the

pump

summarizes

Table

Battery

Battery

Battery

The

voltage

the

power-on

R147

motor

the

prevent

load,

comparator

3-6.

<

11.6V,

<

11.5V,

<

11.4V,

source

circuit.

short-term

from

Battery

0106-1

U106-2

U106-14

to

the

voltage

turning

reference

Status

Monitor

battery

off

the

thresholds.

=

HI

=

HI

=

LO

status

drops

from,

instrument.

Reference

(i.e.,

(i.e.,

(i.e.,

DEADBAT-

RESET-

monitor

for

Thresholds

LOWBATT-

comes

example,

Table

=

=

=

from

3-6

LO)

LO)

LO)

part

of

3-66

EUNCTIONAL

DESCRIPTION

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해

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TO

BATTERY

0101

Bi,

71494

Figure

3-26.

Battery

3-67

Charge

Indicator

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FUNCTIONAL

DESCRIPTION

3.9.6

Power

The
an
actuate

U102, a JK

tion,
is
debounce

ON/OFF
off,

On/Off

instrument

electro-mechanical

the

flip-flop,

U102

activated.

is

the

switch

U102

will

the Q output,

the

logic

turning

logic

ing

the

The

+12V

3.9.7

The

LO G output

on,

which

the

battery

divider

status

board

on

the

and

-12V

power

and

and

3.9.8.

then

chain

circuitry

Control

is

turned

electronic

toggled

R128,

ON/OFF

activation.

toggle

pin

14,

through

+12V

power

switch

+5V

power

of

U102

turns

status

comparators,

CR1I13,

is

(figure

on

switch.

switching.

is

the

(changes

R127,

switch

C113

If

so

that

will

J1-10

power

supplies

supply,

again

supplies

is

on

0109

R142,

described

3-28)

or

off

However,

main

and

state)

and

apply

the

control

instrument

the Q output,

go

LO.

The

(PWRON)

which

and

powers

will

reverse

are

applied

and

0110

0106 pins

R143,

in

R144,
section

electronically

a

pushbutton

element.

every

U103-11,

a

time

a

Schmitt

clock pulse

was

pin
high Q output
and

to

the

in

turn

up

the

the

above

discussed

through

to

apply

R145,

R133

1,

further

2,

and

3.9.5

rather

is

In

normal

the

ON/OFF

trigger,

to

U102-13

previously

15,

will

is

base

of

enables

instrument.

process.

in

to

0108,

battery

and

14,

R146.

(figure

than

used

to

switch

turned

go

HI

applied

0122,

the

+5

Actuat-

sections

turning

voltage

through

The

battery

3-27).

with

opera-

upon

and

to

it

to

the

The

battery

are

configured

from

being
voltage
will

go

causing

The

LO

U103

pin 3 to

reset
power

pulls

HI

and

The

CPU

via

output

driving

The

on/off

+5VAO

drops
LO.
U103-4

level

U103-4

source.

U103

U103

can

U103

supply

status

as

circuit

an

toggled

below

This

LO is

and

U103-10

from

U103

go

HI,

and

U103-10,

This

action

pin 8 LO,

pin 4 is

turn

U40

the

port

pin 2 LO,

control

discussed

R/S

to

turn

11.4

volts,

coupled

pin

holding

resetting

LO.

instrument

on

the

causing

circuit

in

can

hold

flip-flop

the

instrument

through

to

be

10

is

U102

the

instrument

turns

U103-4

logic/analog

0103

is

always

section

U102

which

the

battery

set

with

coupled

reset

on

0107,

and

off

by

pin 3 to go

active,

3.9.10.

reset.

can

be

on.

status

R147,

discharging

pin

to

0103

and

the

must

be

pulling

U103-10

resetting

board

and

0103-4

set

to

If

the

output

10

LO

and

pin

instrument

connected
CR112

so

0102. This

turning

HI,

resetting

is

powered

and
prevent

battery

C115

pin 4 HI.

1,

causing

LO,

U103

pin

on

Q106,

0103-10

U102

(U106-14)

and

off.

which

to

is

an

10

done

To

AC

is

U102。

by

the

3-69

FUNCTIONAL

DESCRIPTION

3.9.7

3.9.8

+12

Volt

The

+12V

Although

to

+14

volts,

the

instrument

The

pump

own

switch,

The

power
controls
J/K

flip-flop

output,

configured
collector
switch.

The

current

through

Q123

collector

supply)

the

instrument.

+5V

Logic

Supply

supply

labeled

motor

0115

ON/OFF

the

+5V

goes

HI,

as:an

from

flowing

0121

base

causing

Supply

(figure

is

derived

+12V,

depending

is

plugged

is

not

and

switch

Logic

U102

is

and

emitter

Q123

base,

through

and

is

applied

them

(figure

3-29)

directly

the

actual

on

the

in.

powered

Q116,

directly

controls

and

-12V

toggled

current

follower.

also

Q122

Q114 base,

to

U107

to

be

enabled,

3-29)

state

by

supply.

by

flows

turning

from

voltage

of

the

+12V

from

the

+12V

the

ON/OFF

to

the

Current

flows
turning

(+5V

supplying

the

can

battery

supply,

the

supply,

To

turn

switch,

base

then

on

Q123,

through

them

supply)

battery

be

between

charge

but

battery

which

the

of

Q122,

flows

the

R178

on.

The

and

power

via

0123.

about

and

whether

through

via

F101.

in

turn
instrument
U102-15,

which

into

0122

+12

volt

and

also

+12V

from

U108 (-12V

to

the

rest

+11

its

on,

the

0

is

supply

of

The

+5V

supply

instrument,

This

L103

supply

tor.

It

is

tegulator

and

Q121

is

the

diode,

CR117

the 5 volt

0119.
about
the

and

is

Cl44
20

80085

0124.

furnishes

power

is

powered

via

to

very

from

F101.

with a pulse

energy

C136

an

overvoltage

line

and

kHz,

which

clock

storage

serves

in

case

R180

frequency,

most

the

displays,

similar

the

U108

drives

width

as a filter

protection

of a regulator

result
is

synchronized

by a differentiated

of

the

logic

and

power

to

that

of

the

battery voltage

the

pass

transistor,

modulated

inductor,

signal

CR116

capacitor.

diode

to

failure,

in a free-running

to

23.4

Vcc

potentials

to

the

thermometer.

battery charger

or

battery

at a 23.4

is

the

protect

such

switching

commutating

charger

Q119,

kHz

the

items

as a shorted

frequency

kHz, a submultiple

23.4

kHz

pulse

in

the

regula-

via

rate.

Q120

on

of

of

via

3-70

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DESCRIPTION

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FUNCTIONAL

DESCRIPTION

3.10

3.10.1

3.10.2

THERMOMETER

Temperature

The

display/thermometer

ing

system,
vated
Measurement

analog

signal

BCD

ler

As

signal

the
display.

circuit

uController

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2K

timing

writing.

by

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temperature

conditioning

words

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compute

shown

data

in

is

through
The

so

ucontroller

bytes

of

registers,

FUNCTIONS

Measurement

containing

cycle

by

the

and

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block

linearized

thermometer

that

internal

(Ul,

(UL)

ROM,

(figure

of

the

is

initiated.

signal

circuitry

A/D

converter.

display

diagram

and

the

multiplexer,

figure

is

128

bytes

and

I/O

board

its

own

thermometer

to

the

the

converted

module

power

3-33)

an

NSC

of

porting

3-32)

is

an

essentially

hardware

probe

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thermometer

module.

and

is

digitized

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temperature,

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also

on

COP444L

RAM,

to

and

contains

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for

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BCD.

writes

board

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data

and

software.

from

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signal

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FUNCTIONAL

an

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DESCRIPTION

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which

or

to

the

thermometer

or

the

which

G3

register

to

CLK1

the

divided

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of

the

U9

regarding

and

through

selects

digit

be

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probe

senses

is

be

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are

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display

G3)

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read

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when

is.

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the

by

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test

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the

state

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output

when

inputs.for

crystal.

crystal.

to

achieve

This

cycle

within

-

state

inputs

display

into

of

for

that

it

conducts.

Capacitors

The

the

time

the

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DO

digit

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channel,

test

port.

for

the

the

testing

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crystal

16

ensures

through

strobe

or

off)

and

outputs.

data

state

Gl

is

an

automatic

measurement

storage

probe

the

sense

purposes.

on

clock

C10

frequency

microsecond

that

execute

D3

(LSD,

via

U9-13.

(AO

(BO

output

is

well.

signal

Q62,

generator,

and

Cll

the

outputs

GO

is

turn-

G2

causing

is

cycle

at

the

RST

input,

tion.

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DO

through

display

with

LO

through

D3

decimal

C8

and

point

and

L6

L7

R14

are

are

is

3-79

performs

the

the

display

driven

display

from

the

segment
digit
output

power-on

drivers.

SK.

initializa-

drivers.

The

Outputs

FUNCTIONAL

DESCRIPTION

3.10.3

Analog

The

analog

regulator
and

R72;

voltage
probe
Li,

C24,

As

the
thermistor,
leads

U13

from
R72,
U7-5

via

output

fier

R55

and

‘-VDC,

which

U6-11.

The

output

via

R53,

Ul3

compensates

the

thermistor.
voltage

the

bridge
through
top

of

output

with

sponding

Input

and

input

U13;

wide-band

at

U7-7

tip.

Filtering

C18,

and

temperature

Rt,

to a changing

U7-7.

and

the

probe

R71.

These

is

applied

(op

amp)

U7

R54.

This

is

the

voltage

as

well

1.2V

higher

at

R71

R53,

REF,

the

bridge

voltage

0.000V

corresponding

to

42.2°C

Linearizer

and

resistors

choke

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linearly

C23.

of

decreases

voltage

From

the

circuit.

resistors

to

at

pins 5 and

circuit

voltage

from

as to

for the

The

voltage

than
and
and
as

at

U7-7

(108°F).

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linearizer

R53,
Ll;

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noise

the.

probe

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OUT

terminal,

The

the

differential

scales

level

U7-7

U6-11.

nonlinear

regulator

the

R3

of

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OUT

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is

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tip

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are

6.
the

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is

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voltage,

probe.

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increase

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stray

is

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This

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rises,

This

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voltage

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resistance

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The

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(88.0°F)

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R68,

C18,

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to
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by

the

the

versus

always

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voltage

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and

6,

and

R69,

C23,

and

temperature

is

resistance

resistance

the

REF

goes

is

also

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gain

A/D

converter

REF

terminal

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REF,

temperature

maintains

drives

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applied

tip

rises.

respect

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7;

voltage

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C24.

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provided

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at

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analog

by

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the

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ucontroller

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counts
ucontroller

11

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figure

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multiplexer

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reference

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the

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total

voltage

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voltage.
voltage.

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The

zero

adjust

analog circuit
zero.

R84

(ZERO)

adjusted.

The

voltage

2,

4,

is

it is

and | outputs

equivalent

the

significant

[MSD]),

3,

and

The

digits

the

temperature

represents

Every value

107.9°F.

temperature
MSD,
U6

NSD,

operates

conversion.

is

4).

The

level

ones

digit

indicated

do

107.9°F,

from

reading,

and

continuously

circuit

is

zero

is a variable

is

coded

of

to

one

raw

(least

[NSD]),

by

not

indicate

data.

the

000

to

ucontroller

The

LSD

digit

of

U6

volts,

in

U6

(U6-16,

digit

significant

or

the

the

LSD,

the

For

example,

top

and

999

represents

converts
digits

strobes,

at a rate

ensures

the

digital

resistor

three

15,

of

the

digit

hundreds

NSD,

actual

bottom

this

are

indicating

of

FUNCTIONAL

that

output

which

four-bit

1,

and

temperature

[LSD]),

(most

and

MSD

temperature,

000

represents
of

the

a

temperature

raw

output

about

DESCRIPTION

when

can

data

2).

the

of

Each

input

U6 is

be

words

reading.

the

significant

outputs

but

88.0°F

temperature

value

to

sequentially

which

9.5

digit

milliseconds

manually

at

four-bit

tens

(next

of U6

represent

and

from

the

actual

with

is

from

the

also

the

8,

word

Whether

digit

(U6-5,

999

range.

88.0°F

the

present.

per

to

3.10.5

Multiplexer

The

multiplexer

and

display

of

four-bit

Inputs

BO-B3

state.

AO-A3

(U9-3,

AQ

output;

receives
from

the

BO-B3

The

which

outputs

when

controlled

The

R63.

outputs

to

are

multiplexer

four-bit

SEL

OE

input

It

facilitate

(U9,

figure

accepts

test

data

receives

A2

from
data
NSD

two

DO

through

is

by

can

in a high-impedance

(U9-2,

6,

10,

the

from

output.

distinct

select

word,

LO;

the B word

the

of

the

be

driven

signal.

words

5,

and

data

"4"

the

B3

A

D3

GO

output

multiplexer

(U9-4,

HI

testing.

3-35)

digital

Output

at

DO-D3,

11,

and

13)

are

from

output;

MSD

output

receives

four-bit

(SEL),

or

B,

is

of

by

test

state.

information
is

14)
digit

the

"1"

and

the

words.

at

U9-1,

is

sent

7,

9,

selected

the

(U9-15)

equipment

to

the:

are

temperature

strobes

output

АЗ

from

of

U6;

display

acts

to

the

and

12).

when

ucontroller

is

This

allows

from

ucontroller

and

of

U6;

the

Bi

from

test

as a switch

ucontroller
The A word
SEL

(U5-21).

normally.

to

put

simulation

the

the

"8"

the

state.

is

the

A/D

converter

in

the

data.

Inputs

display

Al

from

output.

LSD

output;
A0-A3

to

through

is

HI,

SEL

pulled

multiplexer's

of

form

test

the

"2"

BO

and

pick

selected

is

down

data

B2

by

3-83

FUNCTIONAL

DESCRIPTION

3.10.6

3.10.7

Display

and

uController

strobes,

(DS10

through
junction
indicates

nated

time,

per

five

When

064,
sistors

SK

through

029

signals

for

but

second.

digits

L7

048,

drive

and

and

sink

buffers

053,

from

neously.

(strobed)

through

Watchdog

D3.

Display

outputs

They send

DS14)

with

to

any

the

This

the

the

one

digits

which

DO

through

054, 060,

current

segments

Q41

030

LO

through

The

display

by

the

(The

Circuit

Driver

L7

and

signals

is

to

SK

(decimal

display

digit.

gives

are

which

Only

are

turned

the

illuminated

D3

or

Q61,

from

g

through

and

040,

and

052,

L6

for

which
appropriate
decimal

(figure

point

3-37)

(figure

DO

through

to

the

display

be

illuminated.

point)

segments

one

digit

on

display

constantly.

are

driven

respectively,

the

display

a

and

the

042

and Q39,

023

and 059, and

are

sent

the

display

is

only

3-36)

D3

and

(a

is

and off

the

appearance

HI

one

cathodes.

decimal

to

all

data

is

enable

connected

are

the

indicating

This

LO

through

through

illuminated

in

succession

at a time,

to

conduct.

point,

033

and 047,

024

five
valid

strobes,

display

output

L6

g)

of

LO

through

and 058.

displays

is

enabled

at

DS12.)

enable

which display

works

are

containing

These

respectively,

output

illumi-

at

any

250

they

L6

034

and

The

in

con-

which

given

times

cause

tran-

and

046,

simulta-

L7

and

DO

3.10.8

The

watchdog

ucontroller

watchdog

through

(°F/°C)

selected).

and

function

13,

U8

pins 4 and

yields

C21

circuit

054

or

the

Under
a

‘occurs

charges

thermometer

Normal/Monitor

a.

Normal

Setting

the

ucontroller

the

monitor

δ.

based

The

Monitor

on

predicted

Setting
the

ucontroller

the

normal

equilibriate
display.

MONITOR

circuit

turns

malfunction

constantly

and 060 and

NORMAL

high

5,

/MONITOR

normal

input

and

no

through

resetting

board.

Modes

Mode

the

NORMAL/MONITOR

to

mode.

the

rate

value

Mode

the

NORMAL/MONITOR

to

mode.

and

The

ucontroller

mode

switch through

the

thermometer

causing a loss

receives

061

if

the

mode

conditions,
at

U8

pins 4 and

signal

R57.

(figure

the

is

The

latch

3-37)

mode

use a different

Temperature

of

change

is

reported

use a different

Temperature

is

continuously

detects

signals

S2

switch

C21

received
resulting

and

switch

is

of

the

to

mode

in

switch

the

input

off

of

the

internal

are

remains

5.

However,

at

LO

turning

to

program

estimated

resistivity

the

display.

to

program

probe

monitored

the

state

SI

via

if

digit

from

DIP

closed

discharged

U8

pins

signal

off

normal

than

in

monitor

than

is

and

of

U8-10,

there

strobes.

the

displays

switch

(MONITOR

if a mal-

11, 12,
is
the

mode

that

about

in

that

allowed

updated

the

isa

no.

by

received

display/

causes

used

30

seconds

the

probe.

mode

causes

used

to

to

NORMAL/

The

5

or

Q51

and

°C

at

in

in

the

3-84

FUNCTIONAL

RNIO

10K

8PL

DESCRIPTION

NOTE:

U1

cor

44461

/8 = 8

/5 = 5

SA

LINES

THRU

DA

THRU

LINES

SG.DP

DE

(SA-SG,DP)

(DA-DE)

s

RN4

&PL

10K

5

TO

| i

+

1

I

!

1
to

上

i

i

| i

|

I
1

RES

pe rr

Ly

—

PIO

P16

Pu

P20

P24

—

CIM

ost

TRU

trae

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OPTION

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i

Figure

3-36.

Temperature

Display

3-85

and

Display

Driver

3.10.9

32

Internal

DIP

Switch

No. 5 (°F/°C)

FUNCTIONAL

(figure

DESCRIPTION

3-37)

3.10.10

Setting
causes
temperature.

through

The
holes

S2

in

the

the

input

internal

position;

Power

The

Power
supply

The
power

to

Control

power

enters

by

CPU

turns

control

determine

temperature
probe
the

CPU

sense

goes

°F/°C

ucontroller

The

SI

the

bottom,

°C = down

Circuit

control

the

plugging

the
circuit.

when

probe
optics

HI.

Table

DIP

switch

to

use

ycontroller

via

functional

DIP

switch

right-hand

position).

(figure

circuit

consists

thermometer

in a thermometer

thermometer

The

to

power-up

is

plugged

are

turned

(See

table

3-7.

CPU

Monitoring

to

different

detects

(no.5)

3-38)

at

module

CPU

monitors

the

in

on)

3-7.)

°C

(Centigrade)

the

signal

is

accessible

side

of

of

J1-24,

probe

on

thermometer

but

out

the

of

constants

state

from

U8-10.

the

instrument

Q37,

Q38,

J1-24

or

and

off

the

thermometer

of

its

TEMP

signal

Thermometer

or

to

of

the

through

Q45, and

is

connected

tester.

by

board.

well

(U40

°F

(Fahrenheit)

calculate

switch

louver

(°F = up

U8.

to

controlling

probe

When

(i.e.,

Probe

pin

the

the

12)

Well

the

+5V

the

well

from

R/S

flip-flop

pin 9 goes
and

Q45.

v(U7)Y

and

plexer
probe

connector

Depending

methods

8.

By

both

and

probe
LO
HI

Condition

Probe
Probe

U8,

HI,

Q38

supplies

A/D

converter

(U9)

and

on

the

for

activating

removing

the

connector

the

thermometer

causes
transition
and

activating

not

in

well:

pin

9,

power

flows

power

(U6).

ucontroller.
is

plugged

position

the

the

probe

the

CPU

is

coupled

the

in

well:

applies

to

ground

(VA)

Q45

+5THERM

in,

of

the

thermometer:

from

and

probe

is

off).

to

pull

through

thermometer.

CPU

signal

TEMP = HI
TEMP = LO HI

power

to
supplies

and

through

through

the

analog

is

always

supplies

power

power

thermometer

the

storage

are

In

Q57

in

this

drain
C27,

well when

place

case,

to

setting

Q38 and

037,

input

(VP)

present

probe,

(i.e.,

removal

ground.

Q57

Drain

LO

Q45.

saturating

and

to

the

when

to

U8,

there

initially

Q57

of

This

flip-flop

When

038

linearizer

multi-

the

are

two

drain

the

HI

to

U8-9

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FUNCTIONAL

DESCRIPTION

3.11

b.

By

inserting

is

empty

through

level.

thermometer.

Application
power

through
ization

The

is

first

R14

to

occur.

thermometer

Alternatively,

causes
U8-9
condition

CIM

The
blocks.

instrument

The

the

to

flip

EQUIPPED

CIM

equipped

These

blocks

ucontroller

through

through

are

thermometer

(i.e.,

R56,

This

delay

of

power
applied,

delays

can

inserting

to

LO.

MODEL

Model

blocks

an

display

the

probe

Q57

and

U8

causes

from

the

rise

be

deactivated

to

The

CR7 and

4200C

4200C

are

an

RS-232

IVAC

CIM

interface

connector

drain

pin 2 is

LO).

U8

045

initializes

VP

goes

HI

of

RST

the

probe

output a LO

ucontroller

CR8

via

contains

designed

port.

II

board, a real-time
port.

when

In

this

held

LO

pin 9 to

and

RST

to

logical

by

removing

into

the

to U8

senses

its

G2

three

to

permit

the

case,

until

become

the

ucontroller.

is

LO,

1,

probe
pins 4 and

the

port.

additional
ASCII

probe

storage

+5V

C27

charges

HI,

activating

Charging

allowing

the

probe

storage

inserted

monitoring

clock,

well

charges

to a HI

When
C8

initial-

connector.

well

5,

causing

probe

functional

of

and

a

027

the

the

3.11.1

CIM

Interface

The

CIM

equipped
which
verters

II

cated
carries

Ul6

loading
access),
a

when

The
upper

an

The

from

operation

The

It's
WR-

contains

to

board

HI

IO

is

connector

only

is a bi-directional

from

and the

to

avoid

Ul6

is

address

eight

transfer.)

read

CIM

or

the

board

timing

RD-.

or
Sl

and

(figure

Model

a

UART,

interface

interfaced

is

the

signals

the

data
data

ambiguous

not

enabled.

lines

address

write

status

HI

is a read

is

selected

is

derived

3-39)

4200C

baud

to

to

in

parallel

bus.
direction

IOA0

and

lines

command

line

from

an

external

the

and

buffer

It

logic

ΤΟΑΙ

copy

to

from

operation.

for

incorporates

rate

generator,

4200C

with

power

is

levels

the
the

an

the

used

enabled

is

are

the

CIM
CPU

I/O

address

required

determined

lower

an

data

gathering

through

the

test

to

isolate

by

on

the

buffered

eight

board
as

IOWR-.

operation

decoder

IVAC

and

J4.

connector

by

the

the

EXTIO-

by

external

ADDR8

address

is

derived

LO

when

CIM

II

RS232

This

system.

16-pin

CIM

CIM

(external

RD-,

bus

and

level

RN2

and

is a write

IOXSEL-

output

board

J5,
II

board.

board

maintains

IODQ-I0D7

ADDR9.

lines

buffered

EXTIO-

con-

The

dedi-

but

I/O

during

is

CIM

(The

LO.

and

+5

Volts

and +12

volts

are

provided

3-88

at

J4

to

operate

the

CIM

board.

FUNCTIONAL

DESCRIPTION

3.11.2

Thermometer

The

thermometer

the

display/thermometer

and

64

bytes
digit
are

code

interface

is

The
can

temperature

The
clock
reset
eter

U10
ture
P25 and

driver

processed

and

four-digit

is

not

compatible

thermometer
occur

with

thermometer

signal

(BRESET)

display

ports

P10-16

display

P26

NORMAL/MONITOR

1-6).

Display

interface

of

RAM.

signals

to

convert

required

with

interface

the

display.

display

(BCLK)

from

interface.

and

segment

monitor

switch

Interface

(U10)

board.

It

decodes

and

thermometer
the

BCD

code

because

the

CPU

interprets

thermometer,

interface
from
the CPU

the

P20-24
and

digit

is

serve

thermometer

and

the

Circuit

is

It

contains

temperature

display
for

transmittal

the

multiplexed

data

as

is

CPU

via

inverted

as

strobe

power

S2

internal

(figure

an

8741A

control
information

bus and

all

possible

well

as

clocked
Ul2,

pin 6 and

to

input ports

signals,
status

DIP

3-40)

satellite

1K

byte

display

signals.

to

to

the

temperature

CPU's

timing.

conditions

the

contents

by

the

initialize

for

respectively.

and P17

switch

`

processor

of

program

segment

These

an

8-bit

CPU.

ROM

and

signals

status

The

display

that

of

the

buffered 3 MHz

4.

Power-on

the

thermom-

the

tempera~

TO,
monitors
settings

the

(nos.

on

Ull

functions

display

tently

kHz).

decimal

clocked

as a pulse

point

at

the

(BDP),

thermometer

stretcher

because

monitoring

the

decimal

ucontroller's

the

temperature

point

clock

is

rate

intermit-

(62.5

3-89

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