Mitutoyo ARK-600 - Tester Calibration; Preliminary Test Force Measurement; Test Force Calibration Procedure; Indicator Calibration Steps

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TESTER

CALIBRATION

(Unnecessary

in

ordinary

maintenance

of

tester.

Special

divices

are

required

in

this

calibration.)

To

check

the

load

and

indicator,

set

the

Measurement/Calibration

switch

of

the

tester

side

panel

to

the

"TEST"

position.

8.1

Preliminary

Test

Force

Measurement

Put

a

load

measuring

device

on

the

specimen

base.

Apply

the

preliminary

test

force

and

read

a

load

value

when

all

pilot

lamps

light

up.

(Displayed

value:

“365.0")

8.2

Test

Force

Calibration

1)

P

l

a

ce

a

load

measuring

device

on

the

anvil

(or

table).

Apply

the

preliminary

load,

and

set

the

Measurement

/

Calibation

switch

on

the

side

panel

to

the

"RESET"

position

in

the

same

condition

as

above

(displayed

value:

"365.0"

)

in

order

to

reset

the

displayed

value

to

the

standard

value

(100.0).

2)

Elevate

the

anvil

to

apply

preload

suitable

for

the

load

measuring

device

used.

3)

Press

the

START

switch

to

apply

the

test

force.

Read

displayed

hardness

values

as

related

to

the

load.

For

evaluating

the

load

corresponding

to

another

hardness

value

on

the

display,

modify

the

preload

condition

mentioned

in

the

previous

item,

or

change

the

position

of

the

indenter

by

raising

or

lowering

the

specimen

base

with

the

load

applied,

and

mesure

the

load.

4)

To

release

the

load,

press

the

START

switch

again.

8.3

Indicator

Calibration

1)

Put

a

meter

testing

device

on

the

specimen

base.

The

device

shall

be

regarded

as

the

datum

position.

2)

Elevate

the

anvil

to

apply

the

preliminary

test

force.

3)

Lower

the

spindle

of

the

meter

testing

device,

and

elevate

it

again

to

set

it

to

the

datum

position.

4)

Press

the

RESET

switch

for

approx.

1

second

to

reset

the

displayed

value

to

the

standard

value.

5)

Lower

the

spindle

of

the

meter

testing

device

below

"-30".

Then,

raise

it

a

little

to

measure

the

reading

error

in

the

upward

direction

of

the

indenter.