Omega Engineering CL521 Manuale utente

fcCL521

Temperature

Calibrator/Thermometer

OMEGA

warrants

this

unit

free

defects

materials

and

workmanship

and

give

satisfactory

service

for

period

months

from

date

purchase.

OMEGA

Warranty

adds

additional

one

(1)

month

grace

period

the

normal

two

(2)

year

product

warranty

cover

handling

and

shipping

time.

This

ensures

that

our

customers

receive

maximum

coverage

each

product.

the

unit

should

malfunction,

must

returned

tathe

factory

for

evaluation.

Our

Customer

Service

Department

will

issue

Authorized

Return

(AR)

number

immediately

upon

phone

written

request.

Upon

examination

OMEGA,

the

unit

found

defective

will

repaired

replaced

charge.

However,

this

WARRANTY

VOID

the

unit

shows

evidence

having

been

tampered

with

shows

evidence

being

damaged

result

excessive

corrosion;

current,

heat,

moisture

vibration;

improper

specification;

misapplication;

misuse

other

operating

conditions

outside

OMEGA's

control.

Components

which

wear

which

are

damaged

misuse

are

not

warranted.

These

include

contact

points,

fuses,

and

triacs.

There

are

warranties

except

stated

herein.

There

are

other

warranties,

expressed

implied,

including

but

not

limited

the

implied

warranties

merchantability

and

fitness

for

particular

purpose.

OMEGA

ENGINEERING,

INC.

not

responsible

for

any

damages

losses

caused

other

equipment,

whether

direct,

indirect,

incidental,

special

consequential,

^ich

the

purchaser

may

experience

result

the

installation

use

the

product.

The

buyer's

sole

remedy

for

any

breach

this

agreement

OMEGA

ENGINEERING,

INC.

any

breach

any

Warranty

OMEGA

ENGINEERING,

INC.

shall

not

exceed

the

purchase

price

paid

the

purchaser

OMEGA

ENGINEERING,

INC.

for

the

unit

units

equipment

directly

affected

such

breach.

Every

precaution

for

accuracy

has

been

taken

the

preparation

this

manual,

however,

OMEGA

ENGINEERING,

INC.

neither

assumes

responsibility

for

any

omissions

errors

that

may

appear

nor

assumes

liability

for

any

damages

that

result

from

the

use

the

products

accordance

with

the

information

contained

the

manual.

Direct

all

warranty

and

repair

requests/inquiries

the

OMEGA

ENGINEERING

Customer

Service

Department:

call

Toll

Free

1-800-622-2378,

FAX

203-359-7811;

International:

203-359-1660,

FAX:

203-359-7807.

BEFORE

RETURNING

ANY

PRODUCTfS)

OMEGA,

YOU

MUST

OBTAIN

AUTHORIZED

RETURN

(AR)

NUMBER

FROM

OUR

CUSTOMER

SERVICE

DEPARTMENT

(IN

ORDER

AVOID

PROCESSING

DELAYS).

The

assigned

number

should

then

marked

the

outside

the

return

package

and

any

correspondence.

FOR

WARRANTY

RETURNS,

please

have

the

following

information

available

BEFORE

contacting

OMEGA:

P.O.

number

under

which

the

product

was

PURCHASED,

Model

and

serial

number

the

product

under

warranty,

and

Repair

instructions

and/or

specific

problems

you

are

having

with

the

product.

FOR

NON-WARRANTY

REPAIRS

CALIBRATION,

consult

OMEGA

for

current

repair/calibration

charges.

Have

the

following

information

available

BEFORE

contacting

OMEGA:

Your

P.O.

number

cover

the

COST

the

repair/calibration,

Model

and

serial

number

product,

Repair

instructions

and/or

specific

problems

you

are

having

with

the

product.

OMEGA'S

policy

make

running

changes,

not

model

changes,

whenever

improvement

possible.

That

way

our

customers

get

the

latest

technology

and

engineering.

OMEGA

registered

trademark

OMEGA

ENGINEERING,

INC.

1991

OMEGA

ENGINEERING,

INC.

All

rights

reserved

including

illustrations.

Nothing

this

manual

may

reproduced

any

manner,

either

wholly

part

for

any

purpose

whatsoever

without

written

permission

from

OMEGA

ENGINEERING,

INC.

Printed

Finland

TABLE

CONTENTS

CL521

TEMPERATURE

CALIBRATOR/THERMOMETER

SECTION

PAGE

SECTION

INTRODUCTION.1

1.1

General

Description.;.1

1.2

Features.

1.3

Available

Models.

SECTION

INSTALLATION.

2.1

Unpacking.

2.2

Removing

the

Carrying

Case.2

2.3

Charging

the

Battery.3

2.4

Wiring

Connections.

SECTIONS

GENERAL

OPERATION.4

3.1

Front

Panel

Functions.

3.2

Initial

Start-up.

SECTION

THERMOCOUPLE

AND

MILLIVOLT

MEASUREMENTS.6

4.1

Theory

Operation.6

4.2

Reference

Junction.7

4.3

Thermocouple

Measurements.8

4.3.1

Connections

and

Reference

Junction

Mode

Selection.

4.3.2

Measuring

Temperature.11

4.3.3

Checking

Changing

Reference

Junction

Temperature.12

4.4

Measuring

Thermocouple

Resistance.13

4.5

Measuring

Millivolts.14

SECTION

PtIOO

AND

RESISTANCE

MEASUREMENTS.14

5.1

General

Information.14

5.2

Connecting

Resistance

Probe

the

CL521.15

5.3

PtiOO

Temperature

Measurement.17

5.4

Resistance

Measurement.19

SECTION

ADDITIONAL

MEASUREMENT

FUNCTIONS.20

6.1

Using

Other

Measurement

Functions.20

6.2

Monitoring

Rate

Change.20

6.3

Indications

Deviation.20

6.4

Checking

Minimum

and

Maximum

Readings.21

6.5

Returning

Normal

Measurement

Mode.21

TABLE

CONTENTS

(Continued)

SECTION

PAGE

SECTION

THERMOCOUPLE

SIMULATION

AND

MILLIVOLT

CALIBRATION.21

7.1

Principle

Thermocouple

Simulation

.21

7.2

Thermocouple

Simulation.21

7.2.1

Connection

and

Selection

Compensation

Modes.21

7.2.2

Simulation.24

7.2.3

Effect

Loading.26

7.3

Millivolt

Calibration.27

SECTION

RS-232C

AND

ANALOG

OUTPUT

OPTION.28

8.1

General

Description.28

8.2

Installing

the

RS-232C

Digital

Interface

Option.28

8.2.1

Data

Format

and

Baud

Rate.29

8.2.2

Connection

Cables.29

8.2.3

Output

Message

Format

and

Timing..31

8.2.4

End

Characters

the

Output

Message.32

8.2.5

Remote

Control

Computer.32

8.3

Analog

Output.35

8.3.1

Analog

Output

Specifications.36

SECTION

SERVICE

AND

CALIBRATION.36

SECTION

SPECIFICATIONS.38

SECTION

INTRODUCTION

1.1

GENERAL

DESCRIPTION

The

OMEGA

CL521

precision,

high-accuracy

calibrator

for

use

the

bench

the

field.

Featuring

exceptionally

high

accuracy,

the

CL521

can

measure

any

ten

thermocouple

types,

platinum

RTDs,

millivolts,

ohms.

The

CL521

also

instrument

calibrator,

allowing

users

calibrate

check

the

above

sensor

type

instrumentation.

The

CL521

designed

for

ease

use,

with

large,

easy-to-read

LCD

display

with

0.41"

(10.4

mm)

digits.

touch-sensitive

keypad

makes

function

selection

and

value

entry

fast

and

easy,

while

toggle

switch

simplifies

selection

between

measurement

and

calibration

functions.

The

CL521

can

store

six

values

for

quick

selection

common

calibration

temperatures,

well

store

six

measurement

readings.

Other

features

include

rate

change

calculation,

min

and

max

storage,

and

differential

measurement

from

stored

value.

The

CL521D

has

all

the

features

the

CL521

with

the

addition

RS-232C

two-way

communications

and

analog

output.

The

RS-232C

communications

can

used

for

remote

computer

control

the

unit,

well

for

transmitting

data

computer,

printer

datalogger.

The

analog

output

per

degree

signal,

with

10x

amplification

when

using

the

differential

function

the

CL521D.

Each

unit

supplied

complete

with

carrying

case,

connector

leads,

type

thermocouple

extension

cable

with

male

connector,

calibration

certificate,

TAS-U-5

connector,

and

power

adapter.

1.2

FEATURES

•

Calibrate

and

Measure

and

Thermocouples

•

Measure

100

ohm

RTDs

•

Math

Functions

Calculate

Rate

Change

and

Difference

•

Min/Max

Storage

•

Store

Six

Simulations

for

Quick

Recall

•

Enter

Calibration

Values

Directly

from

Keypad

Through

Up/Down

Increment

Keys

•

Available

with

Optional

RS-232C

and

Analog

Output

1.3

AVAILABLE

MODELS

MODEL

NUMBER

DESCRIPTION

CL521

CL521D

CL521-RS232C

CL521-MA

Temperature

calibrator/indicator

Calibrator

with

RS-232C

and

analog

output

RS-232

interface

board

(includes

software)

Milliamp

board

with

Vdc

supply

SECTION

INSTALLATION

2.1

UNPACKING

Remove

the

packing

list

and

verify

that

all

equipment

has

been

received.

there

are

any

questions

about

the

shipment,

please

call

the

OMEGA

Customer

Service

Department

-800-622-2378.

Upon

receipt

shipment,

inspect

the

container

and

equipment

for

any

signs

damage.

Take

particular

note

any

evidence

rough

handling

transit.

Immediately

report

any

damage

the

shipping

agent.

NOTE

The

carrier

will

not

honor

any

claims

unless

all

shipping

material

saved

for

their

examination.

After

examining

and

removing

contents,

save

packing

material

and

carton

the

event

reshipment

necessary.

All

units

are

supplied

with

carrying

case,

connector

leads,

type

thermocouple

extension

cable

with

male

connector,

calibration

certificate,

TAS-U-5

connector,

and

power

adapter.

2.2

REMOVING

THE

CARRYING

CASE

laboratories

and

maintenance

shops,

the

CL521

easiest

use

without

its

carrying

case.

order

remove

the

carrying

case,

sure

the

adaptor

not

connected,

then

open

both

carrying

case

flaps

and

the

strap

around

the

instrument.

Lift

the

rear

the

instrument

about

inch,

lift

the

front

the

instrument,

and

pull

out

the

case.

The

unit's

carrying

handle

may

then

turned

downwards

front

act

stand

for

easier

viewing.

The

unit

installed

into

its

case

the

reverse

order.

the

field,

the

carrying

case

most

convenient.

When

carried

around

the

neck,

the

unit

can

easily

used

merely

opening

the

flap

front

the

panel

and

turning

over

the

back

the

case.

Figure

2-1.

Removing

the

Carrying

Case

2.3

CHARGING

THE

BATTERY

The

power

used

the

unit

comes

from

the

internal

battery,

which

also

keeps

certain

program

parameters

memory

even

when

the

unit

switched

off.

The

unit

comes

with

Its

battery

partialiy

charged

and

therefore

advisable

charge

the

battery

before

use.

batteries

the

instrument

begin

run

down,

the

message

BATTLO

appears

periodically

the

display.

the

battery

voltage

goes

too

low

the

instrument

switches

itself

off

prevent

destructive

discharge

the

batteries

and

loss

data

stored

the

memory

registers.

When

BATTLO

appears

the

display,

the

battery

should

recharged

soon

connector

the

rear

the

unit.

Connect

the

charger

the

120

VAC,

making

sure

that

the

line

voltage

correct.

Charge

the

battery

for

approximately

hours;

hours

used

during

charging.

2.4

WIRING

CONNECTIONS

The

CL521

connection

terminals

are

found

top

the

unit.

Connections

are

easily

[3?,

®''®

‘^®Pt

the

way

the

display

and

keypad.

When

using

the

carrying

case,

the

flap

front

the

connection

panel

may

shut

during

use.

This

reduces

changes

reference

temperature

thermocouple

temperature

measurements,

thus

ensuring

measurement

accuracy

environments

where

ambient

temperature

may

vary

greatly.

The

terminal

panel

contains

two

separate

types

connections.

79-

®®®<^

f®’’

thermocouple

and

millivolt

measurement

and

measurement/calibration

switch

the

MtAbUKtMENT

position,

this

connection

measures

inputs.

The

CALIBRATION

calibration

output

signal.

The

resistance

circuit

connected

the

and

connection

may

also

measured

using

the

TCii

measurement

function.

The

Ohm

and

PtIOO

connection

used

measure

the

resistance

PtIOO

other

resistive

probes.

Both

three

and

four-wire

connections

are

possible.

Used

four

wire

connections

SECTION

GENERAL

OPERATION

3.1

FRONT

PANEL

FUNCTIONS

The

functions

the

CL521

have

been

chosen

for

their

usefulness

temperature

measurement

and

calibration.

The

functions

are

easily

selected

from

the

keypad

the

front

panel.

CL521

functions

are

listed

below

and

shown

Figure

3-1.

For

complete

instructions,

refer

Sections

THERMOCOUPLE

MEASUREMENTS:

Temperature

measurement

either

°C

°F

using

ten

different

thermocouple

types

Reference

junction

modes:

External

reference

junction,

the

temperature

value

not

0°C,

must

entered

into

the

memory.

Reference

temperature

measured

using

Pt100

0.00385

resistance

probe

Reference

temperature

measured

using

internal

sensor

Millivolt

measurement

-10

110

Thermocouple

resistance

measurement

RESISTANCE

MEASUREMENT:

Temperature

measurement

°C

°F

using

Pt100

<=c

0.00385

resistance

probe

Ohm

measurement

400

ohms

ADDITIONAL

MEASUREMENT

FUNCTIONS:

Rate

change

measurement

Measurement

deviation

from

preset

value

Storage

minimum

and

maximum

values

CALIBRATION

FUNCTIONS:

Thermocouple

simulation

°F

Millivolt

calibration

-10

110

Entry

calibration

values:

From

keypad

From

memory

Smooth

increase

decrease

Fine

adjust

using

INC

and

DEC

switches

Automatic

stepping

through

five

preset

calibration

values

Figure

3-1,

Front

Panel

Functions

3.2

INITIAL

START-UP

The

CL521

switched

and

off

pressing

the

and

OFF

keys,

respectively.

After

the

instrument

switched

on,

performs

various

routines

and

self-tests.

message

flashes

the

display

indicating

the

version

the

CL521.

After

this,

the

unit

begins

operation

the

most

recently

used

mode

operation.

SECTION

THERMOCOUPLE

AND

MILLIVOLT

MEASUREMENTS

4.1

THEORY

OPERATION

thermocouple

temperature

probe

composed

two

wires

different

materials

connected

together.

There

specific

thermopotential

between

the

wires

which

varies

non-linearly

function

temperature.

two

wires

different

materials

and

are

connected

loop

shown,

the

thermoelectric

effect

causes

flow

current

through

the

loop,

corresponding

the

temperatures

and

the

junction

points.

Figure

4-1.

Basic

Thermocouple

Circuit

the

circuit

broken,

its

thermopotential

can

measured.

Assuming

the

voltmeter

does

not

create

load

the

circuit,

the

potential

determined

solely

temperatures

and

(the

thermopotentials

the

copper

wires

and

the

thermocouple

conductors

cancel

each

other

long

both

connections

are

the

same

temperature).

Figure

4-2.

Thermocoupie

Circuit

with

Meter

Normally

measured

while

the

reference

junction

temperature

kept

constant

temperature

T2,

somehow

compensated

for

during

evaluation

the

measured

value.

Frequently,

the

circuit

broken

the

reference

junction.

Thus

the

reference

junction

moved

the

point

where

the

connection

made

from

the

thermocouple

conductors

the

copper

wires.

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