Fluke 871A Operating instructions

JOHN

FLUKE

MFG.

CO.,

INC.

wed:

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to:

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FOR

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Preliminary

Operating

Instructions

FLUKE

for

FLUKE

MODEL

871A

€

871AB

“nN

ALL

SOLID-STATE

DIFFERENTIAL

VOLTMETER󰾰

چگ

Ume

componEN

Serial

No.

and

above

JOHN

FLUKE

MFG.

CO.,

INC.

P.O.

Box

7428,

Seattle

33,

Washington

Preliminary

Operating

Instructions

for

MODEL

871A

€

871AB

ALL

SOLID-STATE

DIFFERENTIAL

VOLTMETER

February

1965

ARANA

BEN

را󰾯

mar

۱۸۱

any

1725

NIE

و󰾯

pupa

871A

€

871AB

TABLE

CONTENTS

Section

Title

Page

SPECIFICATIONS

1-1

OPERATING

INSTRUCTIONS

2-1

2-1.

Preliminary

Operation

for

Model

871A

2-1

2-2.

Preliminary

Operation

for

Model

871AB

2-1

2-3.

Battery

Charging

aoe ARR

2-4.

Zeroing

Instructions

2-2

2-6.

Operation

Differential

Voltmeter.

2-2

2-7.

Operation

Conventional

Voltmeter

2-3

2-9.

Measurement

Voltage

Excursions

aboutlasNonumaleValue.

dom

III

CALIBRATION

3-1

3-1.

General.

3-1

3-4,

Preliminary

Calibration.

3-2

3-5.

Null

Detector

Calibration

. . e

3-2

3-6.

Volt

Range

Calibration

. .

3-2

3-7.

Volt

Range

Calibration

3-3

3-8.

100

Volt

Range

Calibration

3-3

3-9.

1000

Volt

Range

Calibration

3-3

SFA

۱1

tut

i^c)

ias

rii

871A

871AB

SECTION

SPECIFICATIONS

DIFFERENTIAL

VOLTMETER

ACCURACY:

+(0.03%

input

voltage

uv)

from

1100

VDC.

VOLTAGE

RANGES:

10,

100,

1000VDC

with

10%

overvoltage

capability

each

range.

NULL

RANGES:

Input

Range

Null

Ranges

0.001,

0.01,

0.1

0:001,

70-017

2031

LIN,

100

0.01

DOMO

1000

0.1,

10,

100

INPUT

RESISTANCE:

Infinite

null

from

VDC;

meghoms

above

VDC.

METER

RESOLUTION:

maximum.

VOLTAGE

DIAL

RESOLUTION:

xaximum.

CONVENTIONAL

VOLTMETER

ACCURACY:

range.

RANGE:

Voltage

Range

Input

Resistance

1000-0

-1000

Meg

100-0-100

10-0-10

1-0-1

*0.1-0-0.1

*0.01-0-0.

*0.

001-0-0.

001

Meg

NOTE:

10%

overvoltage

capability

each

range.

*These

ranges

obtained

using

null

ranges

with

all

four

voltage

readout

dials

set

zero.

1-1

871A

871AB

GENERAL

ELECTRICAL

DESIGN:

Completely

solid-state.

REGULATION

REFERENCE

SUPPLY:

0.001%

for

10%

line

voltage

change.

INPUT

RESISTANCE

NULL

DETECTOR:

megohms

two

highest

null

ranges

for

all

input

ranges;

megohm

two

lowest

null

ranges

for

all

input

ranges.

REFERENCE

ELEMENT:

Temperature-compensated

zener

diode.

COMMON

MODE

REJECTION:

130

db.

REJECTION:

Frequency

Normal

Mode

Common

Mode

cps

120

cps

400 cps

OPERATING

TEMPERATURE

RANGE:

Within

specifications

from

559F

95°F.

Within

05%

from

32°F

1229F.

STORAGE

TEMPERATURE

RANGE:

871A

-409F

1589F

871AB

-409F

140°F

KELVIN-VARLEY

ACCURACY:

+0.01%

output

from

1/11

full

scale

full

scale.

RECORDER

OUTPUT:

Adjustable

from

+20

minimum

for

full

scale

right

and

left

deflections.

POLARITY:

Selectable

via

front

panel

switch.

SHOCK

AND

VIBRATION:

Meets

requirements

MIL

-T

-945A.

INPUT

POWER:

Model

871A

115/230

VAC

+10%,

440

cps;

Model

871AB

115/230

VAC

+10%,

440

cps

and

rechargeable

battery

operation

(minimum

hours

operation

full

charge).

SIZE:

high

8-1/2"

wide

11-3/4"

deep.

WEIGHT:

Model

871A

-approximately

lbs.

Model

871AB

-approximately

lbs.

1-2

871A

871AB

SECTION

OPERATING

INSTRUCTIONS

2-1,

PRELIMINARY

OPERATION

FOR

MODEL

871A

Connect

power

plug

115

volt

power

source.

instrument

has

been

wired

for

230

volt

operation,

connect

230

volts

AC.

NOTE:

The

round

polarized

plug

connects

instrument

case

power

system

ground.

Use

three-to-two

adapter

supplied

with

instrument

when

connecting

two-contact

receptacle.

For

personnel

safety,

connect

short

green

lead

good

earth

ground.

Set

switches

871A

voltmeter

follows:

RANGE

1000

NULL

TVM

(transistorized

voltmeter)

polarity

(positive)

all

voltage

(zero)

readout

dials

2-2.

PRELIMINARY

OPERATION

FOR

MODEL

871AB

For

line

operation,

connect

power

plug

115

volt

power

source.

instrument

has

been

wired

for

230

volt

operation,

connect

230

volts

AC.

NOTE:

The

round

polarized

three-prong

plug

connects

instrument

case

power

system

ground.

Use

three-to-two

adapter

supplied

with

instrument

when

connecting

two

-contact

receptacle.

For

personnel

safety,

connect

short

green

lead

good

earth

ground.

For

line

operation,

set

POWER

switch

LINE

OPR.

For

battery

operation,

set

POWER

switch

BAT

CHECK

and

wait

for

seconds.

Meter

needle

should

indicate

BATTERY

region.

not,

charge

batteries

outlined

paragraph

2-3.

batteries

are

charged,

set

POWER

switch

BAT

OPR-LINE

ISOL.

2-1

871A

871AB

Set

controls

voltmeter

follows:

RANGE

1000

NULL

TVM

(transistorized

voltmeter)

polarity

(positive)

all

voltage

(zero)

readout

dials

2-3.

BATTERY

CHARGING

Connect

power

plug

115

volt

power

outlet.

instrument

has

been

wired

for

230

operation,

connect

230

volts

AC.

Set

POWER

switch

BAT

CHG-LINE

OPR.

After

hours,

batteries

will

fully

charged

and

capable

operating

the

instrument

for

least

hours.

While

the

batteries

are

being

charged,

the

instrument

may

operated

the

same

for

line

operation.

CAUTION:

Since

overcharging

decreases

battery

life,

recommended

that

the

batteries

charged

for

less

than

hours

and

never

than

week.

When

used

properly,

the

batteries

will

give

than

200

charge-discharge

cycles

operation.

2-4.

ZEROING

INSTRUCTIONS

2-5.

From

time

time,

may

necessary

adjust

the

internal

meter

zero

control.

This

will

normally

done

somewhat

frequent

intervals

than

complete

instrument

calibration.

Proceed

follows:

Perform

preliminary

operation

stated

paragraph

2-1

2-2.

Mechanically

zero

the

meter

with

the

adjustment

screw

the

front

the

meter

case.

the

instrument

top-back

cover

on,

must

shut

off

for

least

three

minutes

prior

this

adjustment.

the

top-back

cover

off,

another

method

would

short

out

the

internal

meter

terminals

prior

zeroing.

Set

POWER

switch

with

871A

LINE

OPR

with

871AB

and

allow

minute

warmup

period.

Set

RANGE

switch

voltage

readout

dials

zero,

and

NULL

switch

001.

Short

INPUT

post

COMMON

post

and

remove

right

side

panel.

Adjust

electronic

zero

control

R227

until

meter

needle

indicates

zero

when

side

panel

replaced.

Remove

short

between

INPUT

and

COMMON

post.

2-6.

OPERATION

DIFFERENTIAL

VOLTMETER

Perform

preliminary

operation

stated

paragraph

2-1

2-2.

Connect

unknown

voltage

between

INPUT

and

COMMON

posts.

one

side

grounded,

always

connect

the

COMMON

post.

2-2

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