Omega 450 User Manual

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User’s Guide

450 SERIES

Digital Thermometers

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MADE IN

305.4

THERMOCOUPLE THERMOMETER

TYPE E

HOLD

1°

0.1°

OFF

TEMPERATURE INDICATOR

°F

®

450 AET

ON

°F

ON

°C

Servicing North America:

USA: One Omega Drive, Box 4047

ISO 9001

Stamford CT 06907-0047

Cer

tified Tel: [phone] FAX: [phone]

e-mail: [e-mail]

Canada: 976 Bergar

Laval (Quebec) H7L 5A1, Canada
Tel: [phone] FAX: [phone]
e-mail: [e-mail]

For immediate technical or application assistance:

USA and Sales Service: 1-800-826-6342 / 1-800-TC-OMEGA

®

Canada: Customer Service: 1-800-622-2378 / 1-800-622-BEST

®

Engineering Service: 1-800-872-9436 / 1-800-USA-WHEN

®

TELEX: 996404 EASYLINK: 62968934 CABLE: OMEGA

Mexico: En Espan˜ol: [phone]-7803

FAX: [phone]
e-mail: [e-mail]
[e-mail]

OMEGAnet®On-Line Service Internet e-mail

www.omega.com [e-mail]

Benelux:

Postbus 8034, 1180 LAAmstelveen
The Netherlands
Tel: [phone] FAX: [phone]
Toll Free in Benelux: 0800 0993344
e-mail: [e-mail]

Czech Republic:

Frystatska 184, 733 01 Karvina´, Czech Republic
Tel: [phone] FAX: [phone]
Toll Free: 0800-1-66342
e-mail: [e-mail]

France:

11, rue Jacques Cartier
78280 Guyancourt, France
Tel: [phone] FAX: [phone]
Toll Free in France: 0800 466 342
e-mail: [e-mail]

Servicing Europe:

Germany/Austria:

Daimlerstrasse 26, D-75392
Deckenpfronn, Germany
Tel: [phone]
FAX: [phone]
Toll Free in Germany: 0800 639 7678
e-mail: [e-mail]

United Kingdom: ISO 9002 Certified

One Omega Drive
River Bend Technology Centre
Northbank, Irlam, Manchester
M44 5BD United Kingdom
Tel: [phone]
FAX: [phone]
Toll Free in United Kingdom:0800-488-488
e-mail: [e-mail]

It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that apply.
OMEGA is constantly pursuing certification of its products to the European New Approach
Directives. OMEGA will add the CE mark to every appropriate device upon certification.
The information contained in this document is believed to be correct, but OMEGA Engineering,
Inc. accepts no liability for any errors it contains, and reserves the right to alter specifications
without notice. WARNING: These products are not designed for use in, and should not be used
for, human applications.

RETURN REQUESTS/INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service
Department. BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER
MUST OBTAIN AN AUTHORIZED RETURN (AR) NUMBER FROM OMEGA’S
CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID PROCESSING DELAYS).
The assigned AR number should then be marked on the outside of the return
package and on any correspondence.
The purchaser is responsible for shipping charges, freight, insurance and proper
packaging to prevent breakage in transit.

FOR WARRANTY RETURNS, please
have the following information
available BEFORE contacting OMEGA:

1. Purchase Order number under which
the product was PURCHASED,

2. Model and serial number of the
product under warranty, and

3. Repair instructions and/or specific
problems relative to the product.

FOR NON-WARRANTY REPAIRS,

consult
OMEGA for current repair charges. Have the
following information available BEFORE con­tacting OMEGA:

1. Purchase Order number to cover the COST

of the repair,

2. Model and serial number of the product, and

3. Repair instructions and/or specific problems

relative to the product.

OMEGA’s policy is to make running changes, not model changes, whenever an improve­ment is possible. This affords our customers the latest in technology and engineering.
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2003 OMEGA ENGINEERING, INC. All rights reserved. This document may not
be copied, photocopied, reproduced, translated, or reduced to any electronic medium or
machine-readable form, in whole or in part, without the prior written consent of OMEGA
ENGINEERING, INC.

Table of Contents

Section 1: Description

1.1 General Description……………2

1.2 Physical Description…………...3

1.3 Unpacking………………………3

1.4 Specification…………………… 4

Section 2: Operation

2.1 Principles of Operation………...7

2.2 Power…………………………… 8

2.3 Operation……………………….10

2.4 Maintenance……………………13

Section 3: Calibration

3.1 Calibration………………………14

2

Section 1 Description

1.1 General Description

Your hand-held, battery operated digital
temperature indicator is configured for compatibility
with one of five temperature transducers, J,K,E,T
RTD and Thermister.

Each of the configurations linearizes the analog
output from the transducer to produce a stable and
accurate digital temperature display. Plug-in type
input connectors are used for the transducer input
to provide quick connect and disconnect capability.
The indicator functions are controlled by the key­board. The liquid crystal display exhibits the value
of the measurement, degrees Fahrenheit or Celsius,
and the low battery voltage indication.

The use of advanced digital design techniques
give the indicator extremely accurate readings and
exceptionally long battery life.

3

1.2 Physical Description

The indicator measures 45 mm (1.8 inches) in
Height, 85 mm (3.3 inches) in width, and 145 mm
(5.7 inches) in length. Weight is 230 grams (8.0
ounces). The case is constructed of high impact
plastic.

1.3 Unpacking

The indicator is supplied with the battery installed.
A quick electrical test should be performed to verify
that the indicator is operative. See 2.3 in Section 2
for operating instructions.

Contact our Instrument Repair Department
immediately if any problems are observed after
checking out operation of the unit.

4

Specifications

Display:

Liquid crystal display, 7.6 mm (0.3 in.) digit
Height

Operating temperature:

0 to 50°C (32 to 122°F) 0 to 75% Relative
Humidity

Storage Temperature:

-20 to 70°C (-4 to 158°F)

Battery:

NEDA 1604, 9 Volt

Battery Life:

Thermocouple-2000 hours minimum
Platinum RTD-500 hours minimum
Thermistor- 1200 hours minimum

NMRR:

50 dB @ 50±1 Hz, 0.1° range
35 dB @ 50±1 Hz or 60±1Hz, 1° range

CMRR:

140 dB @ 50±1 Hz, 0.1° range
120 dB @ 50±1 Hz or 60±1Hz, 1° range

5

Maximum Common Mode Voltage:

1000VAC(RMS), ±2000V Peak

Accuracy at 22°C (72°F)

1° range: ±0.8°C±0.1% rdg

0.1° range: ±0.25°C±0.1% rdg

Stability with time:

90 days: add ±0.05% rdg.
1 year: add ± 0.1% rdg.

Stability with temperature:

Thermocouple:

zero: ±0.03°C/°C
span: ±0.02% rdg/°C (max)
reference junction tracking ±1.0°C (±1.8°F)
from 5°C to 45°C (41°F to 113°F)

Platinum RTD: ±0.02°C, ±0.01% rdg/°C
Thermistor: positive- ±0.02°C/°C

negative-±0.04°C/°C

±1.5°F±0.1% rdg
±.45°F±0.1% rdg

6

450 Range Table

Type

K

Type

J

Type

E

Type

T

RTD

Thermister

1

0.1

1

0.1

1

0.1

1

0.1

1

0.1

0.1

-189 C to +1372 C

-308 F to +2501 F

-139.8 C to +203.7 C

-219.7 F to +398.7 F

-194 C to +1200 C

-318 F to +2192 F

-117.4 C to +203.5 C

-179.4 F to +398.7 F

-212 C to +1000 C

-351 F to +1832 F

-137.2 C to +203.5 C

-215.0 F to +398.4 F

-217 C to +400 C

-360 F to +752 F

-148.2 C to +203.9 C

-234.8 F to +399.0 F

-233 C to +904 C

-388 F to +1660 F

-102.9 C to +203.5 C

-153.2 F to +398.3 F

-25.7 C to +103.2 C

-14.4 F to +217.8 F

7

Section 2 Operation

2.1 Principles of Operation

The temperature indicator uses two ICs to digitize
and display the analog input signal.

One IC performs the conversion of the analog
input to the digital equivalent via 24 bit delta­sigma analog to digital converter. Battery voltage
is also monitored by this IC and a thermistor
supplies the reference junction correction signal.

The other IC receives input from the analog
to digital converter, linearizes and drives the
LCD display. Front panel buttons are also
monitored.