Omega Products CL551 Installation Manual

http://www.omega.com

@

r

e-mail: info

omega.com

CL551

Portable Temperature Calibrato

OMEGAnetSM On-Line Service

Internet e-mail

http://www.omega.com

[e-mail]

Servicing North America:

USA:

ISO 9001 Certified

Canada:

One Omega Drive, Box 4047
Stamford, CT 06907-0047
Tel: [phone]
e-mail: [e-mail]

976 Bergar
Laval (Quebec) H7L 5A1
Tel: [phone]
e-mail: [e-mail]

FAX: [phone]

FAX: [phone]

For immediate technical or application assistance:

Usa and Canada:

Mexico and
Latin America:

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

Tel: [phone]
En Español: (95) 203-359-7803
e-mail: [e-mail]

SM

SM

SM

FAX: [phone]

Servicing Europe:

Benelux:

Czech Republic:

France:

Germany/Austria:

United Kingdom:

ISO 9002 Certified

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 corrected but OMEGA Engineering Inc. accepts no liability for any errors it

WARNING: These products are not designed for use in, and should not be used for, patient connected applications.

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

ul. Rude armady 1868, 733 01 Karvina-Hranice, Czech Republic
Tel: [phone]
Toll free: 0800-1-66342
e-mail: [e-mail]

9, rue Denis Papin, 78190 Trappes
Tel: [phone]
Toll Free in France: 0800-4-06342
e-mail: [e-mail]

Daimlerstrasse 26, D-75392 Deckenpfronn, Germany
Tel: [phone]
Toll Free in Germany: 0130 11 21 66
e-mail: [e-mail]

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

contains, and reserves the right to alter specifications without notice.

FAX: [phone]

FAX: [phone]

FAX: [phone]

FAX: [phone]

FAX: [phone]

2

INTRODUCTORY NOTE

TTENTION: THIS MANUAL MUST BE REFERRED TO INSTRUMENTS WITH SERIAL N. 006880 ONWARDS.

A

This publication contains operating instructions, as well as a description of the principles of operation, of the
CL551 portable temperature calibrator. The information covers all models of the instrument, including the
basic equipment and its options and accessories.
The instructions reported in this manual, for the above mentioned equipment, are those relevant to:

• Start-up preparation

• Operation description

• Start-up instructions

• Shut-down instructions

• Typical faults and their remedies

OMEGA has used the best care and efforts in preparing this book and believes the information in this
publication are accurate. The OMEGA products are subjected to continuous improvement, in order to pursue
the technological leadership; these improvements could require changes to the information of this book.
OMEGA reserves the right to change such information without notice.
OMEGA makes no warranty of any kind, expressed or implied, with regard to the documentation contained
in this book. OMEGA shall not be liable in any event - technical and publishing error or omissions - for any
incidental and consequential damages, in connection with, or arising out of the use of this book.

The instrument uses sophisticated analog and digital technologies. Repair and service require highly
qualified personnel. OMEGA Engineering, inc will supply, on request, all pertinent instructions and
procedures for service and calibration. OMEGA Engineering, inc specialists will be glad to give any
technical support you may require.

No part of this document may be stored in a retrieval system, or transmitted in any form, electronic or
mechanical, without prior written permission of OMEGA.

3

TABLE OF CONTENTS

1 GENERAL PERFORMANCE ............................................................................................................... 5

1.1 Specifications................................................................................................................................................... 6

2 GENERAL FEATURES........................................................................................................................ 7

2.1 Temperature stability........................................................................................................................................7

2.2 Application flexibility........................................................................................................................................ 7

2.3 Internal digital indicator ....................................................................................................................................7

2.4 External digital indicator................................................................................................................................... 7

2.5 Digital interface ................................................................................................................................................ 7

3 PHYSICAL DESCRIPTION .................................................................................................................. 8

4 FUNCTIONAL DESCRIPTION............................................................................................................. 9

5 PRE-OPERATIONAL CHECK ........................................................................................................... 10

5.1 Unpacking ...................................................................................................................................................... 10

5.2 Preparation for the start-up ............................................................................................................................10

5.3 Wiring practice ............................................................................................................................................... 10

5.4 Thermocouple wires....................................................................................................................................... 11

6 SAFETY RECOMMENDATIONS ....................................................................................................... 12

7 OPERATLON & APPLICATION ........................................................................................................ 13

7.1 Calibration by comparison..............................................................................................................................13

7.1.1 Calibration using the internal Pt100 sensor............................................................................................... 13

7.1.2 Calibration using an external standard Pt100 sensor................................................................................ 14

7.2 Power ON....................................................................................................................................................... 15

7.2.1 Display resolution...................................................................................................................................... 15

7.2.2 Temperature switch test ............................................................................................................................15

7.3 Set-up procedure - 1st level........................................................................................................................... 17

7.4 Set-up procedure - 2nd level.......................................................................................................................... 18

7.5 P.I.D. tuning ................................................................................................................................................... 19

8 MAINTENANCE ................................................................................................................................. 20

8.1 Defects and faults .......................................................................................................................................... 20

8.2 Spare parts..................................................................................................................................................... 20

8.3 Storage ..........................................................................................................................................................21

9 COMMUNICATION ............................................................................................................................ 22

9.1 Communication Protocol................................................................................................................................22

9.2 Reading a variable ......................................................................................................................................... 22

9.3 Setting a variable ........................................................................................................................................... 23

4

1 GENERAL PERFORMANCE

A highly accurate and powerful system to test and calibrate temperature sensors built into a single compact instrument.
Temperature parameter represents the most important factor to fulfil quality, operational safety and reliability of industrial
processes.
Thermocouples, resistance thermometers and any other temperature sensor, when installed in an industrial process,
should be inspected as they undergo mechanical, thermal and chemical stresses which accelerate their aging.
Therefore it is a recommended procedure to inspect, check and calibrate each sensor during the commissioning phase
and at regular programmed time intervals.

The temperature calibrator OMEGA series CL551 is a transportable unit designed to obtain a controlled temperature
with high stability, high uniformity in a range from ambient temperature to +550 °C.
The internal metal block, designed with a self lock feature to avoid dangerous undesired block drop , is interchangeable
and equipped with six holes with immersion depth up to 185 mm.
The portable temperature calibrator CL551 is a multifunction instrument designed to meet the needs of instrumentation
engineers, both in laboratory and in field work.

Accurate, compact, rugged, easy to use; the ideal solution to test and calibrate:

• thermocouples

• resistance thermometers

• thermostats

• gas filled thermometers

• mercury thermometers

• material thermal test

CL551 has been designed using the most advanced thermal and electronic technologies to provide high stability and
accuracy with easy operation combined with a powerful operating flexibility.

5

1.1 Specifications

• Range: from ambient temperature to +550 °C (standard)

• Stability: ±0.05 °C at 450°C

• Stabilizing time: 10 min.

• Heating rate: 20 °C/min

• Cooling rate: from 10 to 25°C/min

• Radial uniformity: ±0.2°C at 450°C

• Axial uniformity: ±0.8°C at 80mm

• Switch test function: with 12 Vdc power supply

• Display: Alphanumeric high contrast dot matrix LCD display a 2 lines of 16 characters backlight device

• Display resolution: 0.1 or 0.01 °C

• Display limit of error: ±0.3°C at 450°C

• Real time clock: with internal battery back up

• A/D converter: 15 bit resolution plus polarity

• Display response time: 10 readings/second

• Digital interface: RS232

• Heater: with stainless steel jacket

• Internal metal block: standard aluminum with n. 6 holes ø 3.175 / 4.75 / 6.5 / 8.0 / 9.5 / 19 / 4.7 mm

• Electronic section: in a separate metal shell

• Internal temperature sensor: Pt100 Class A sensor (control and indication)

• External temperature sensor: an auxiliary input connector for Pt100 sensor is available for the back panel supplied

on request

• Temperature control: PID with optimized tuning constants

• Heat/cool control: full automatic switch-over

• Protection grid: removable

• Mains line connection: socket for mains line cable equipped with a protection fuse

• Power supply: 110 or 220 Vac (to be specified) 50/60 Hz

• Power: 800 VA

• Chassis: separate shell for thermal and electronic sections with a carrying handle

• Size: 370 x 300 x 140mm

• Weight: Nett 10 kg Gross 17 kg

• Aluminum case dimensions : (optional) 250 x 350 x 410 mm

• Packing dimensions: 450 x 450 x 350 mm

6

2 GENERAL FEATURES

2.1 Temperature stability

The internal microcontroller system handles, through the keyboard, man-machine communications, the internal logic and
grants the stability of the internal thermal equalizing metal block of ±0.05 °C.
The temperature control uses a sophisticated PID algorithm with memory stored optimized tuning constants.
For special tests the operator could, through a security code, load different tuning constants.

2.2 Application flexibility

The operative mode set-up is made simple and easy with a sequence of menu pages that only requires <F> (Function),

<E> (Enter), <▲> increase and <▼> decrease instructions.

The panel lamp and keys have the following features:

"HEATING" LED indicates the power applied to the oven
"COOLING" LED indicates cooling action through the modulated fan
"SWITCH TEST" indicates thermostat switch-over
<F> key for function selection

<▲> and <▼> parameter adjustment

<E> Enter key for new instruction acknowledgement

The instrument will also provide some acoustic signals as it follows:

single "beep" operator instruction acknowledgment when the <E> key is pressed

multiple "beep" (five times) the temperature is stabilized on the set-point value and the instrument is ready for

the calibration of the sensor .

2.3 Internal digital indicator

The internal digital indicator is a dot matrix LCD display with 2 lines of 16 characters equipped with a backlight device for
easy reading also in poor light condition.
The operator could select the required operative function, the set-point value and read the temperature value of the
internal thermal equalizing block.
The temperature is obtained with a class A Pt100 resistance thermometer Pt 100.
The measurement limit of error is ± 0.3°C at 450°C.
The overall limit of error can be improved using an external high accuracy calibrated resistance thermometer that can be
supplied on request.

2.4 External digital indicator

When high accuracy is required, the portable temperature calibrator CL551 can be used in combination with high
accuracy indicator and an external high accuracy calibrated resistance thermometer (ask for the pertinent literature).

2.5 Digital interface

The calibrator is standard equipped with a full bi-directional RS232 digital interface for any communication with a
Personal Computer. The Portable Temperature Calibrator can be part of an automatic calibration system with a
programmable cycle and the acquisition of all data required to generate a full calibration report.
OMEGA engineers are ready to support you with components, accessories and software that can fulfil your application
requirements.

7

3 PHYSICAL DESCRIPTION

The CL551 portable temperature calibrator consists of two modules mechanically and electrically interconnected.
The module on the left incorporates the heater, the thermal equalizing metal block, the resistance temperature sensor
and a modulated air blower.
The module on the right is endowed with an alphanumeric dot matrix LCD display with a backlight device, a
microcontroller mother board with all base functions, an operator keyboard, a power package.

The portable temperature calibrator is supplied in an aluminum case with cover and carrying handle to assure easy
transportation and better protection of the instrument against mechanical knocks or scratches.

8