Omega OM-WEB-TEMP, OM-WEB-TC User guide

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User’s Guide

Servicing North America:

U.S.A.: Omega Engineering, Inc., One Omega Drive, P.O. Box 4047

ISO 9001 Certified Stamford, CT 06907-0047 USA

Toll Free: 1-800-826-6342 TEL: [phone]
FAX: [phone] e-mail: [email protected]

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Laval (Quebec), H7L 5A1 Canada
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For immediate technical or application assistance:

U.S.A. and Canada: Sales Service: 1-800-826-6342/1-800-TC-OMEGA

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Servicing Europe:

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It is the policy of OMEGA Engineering, Inc. 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 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.

Table of Contents

Preface

About this User’s Guide ....................................................................................................................... 6

What you will learn from this user’s guide ......................................................................................................... 6

Conventions in this user's guide ......................................................................................................................... 6

Where to find more information ......................................................................................................................... 6

Chapter 1

Introducing the OM-WEB Series .......................................................................................................... 7

Web interface ...................................................................................................................................................... 7

TCP/IP connection ............................................................................................................................................................ 7

Browser requirement ......................................................................................................................................................... 7

OM-WEB Series features ................................................................................................................................... 7

Temperature input channels .............................................................................................................................................. 7

Alarms .............................................................................................................................................................................. 8

Digital I/O channels .......................................................................................................................................................... 8

Functional block diagram ................................................................................................................................... 9

Software features ................................................................................................................................................ 9

Chapter 2

Installing a OM-WEB Series Device .................................................................................................. 10

What comes with your shipment? ..................................................................................................................... 10

Hardware .........................................................................................................................................................................10

Optional components .......................................................................................................................................................10

Documentation .................................................................................................................................................................10

Unpacking ......................................................................................................................................................... 10

Installing the software ...................................................................................................................................... 10

Connecting the AC power adapter .................................................................................................................... 10

Connecting OM-WEB Series hardware ............................................................................................................ 11

Connecting to a LAN for communication within a network ............................................................................................11

Connecting to a LAN for communication across networks..............................................................................................12

Connecting OM-WEB Series hardware directly to a computer .......................................................................................13

Using the web interface .................................................................................................................................... 14

Logging in to a device ......................................................................................................................................................14

Configuring OM-WEB Series hardware using InstaCal ................................................................................... 14

Setting the network parameters ........................................................................................................................................15

Calibrating OM-WEB Series hardware ............................................................................................................ 16

Warm-up period ................................................................................................................................................ 16

Chapter 3

Signal I/O Connections ....................................................................................................................... 17

Screw terminals ................................................................................................................................................ 17

Sensor input .....................................................................................................................................................................17

Current excitation output (OM-WEB-TEMP) .................................................................................................................18

Four-wire, two sensor common (OM-WEB-TEMP) ........................................................................................................18

Four-wire, two sensor common (OM-WEB-TEMP) ........................................................................................................18

CJC sensors ......................................................................................................................................................................18

Digital I/O ........................................................................................................................................................................18

Pull-up/down ....................................................................................................................................................................18

Ground .............................................................................................................................................................................18

Power output ....................................................................................................................................................................18

Thermocouple connections ............................................................................................................................... 19

Wiring configuration ........................................................................................................................................................19

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OM-WEB Series User's Guide

RTD and thermistor connections (OM-WEB-TEMP) ...................................................................................... 19

Two-wire configuration ...................................................................................................................................................20

Three-wire configuration .................................................................................................................................................21

Four-wire configuration ...................................................................................................................................................21

Semiconductor sensor measurements (OM-WEB-TEMP) ............................................................................... 22

Wiring configuration ........................................................................................................................................................22

Digital I/O connections ..................................................................................................................................... 23

Configuring the DIO channels to generate alarms ...........................................................................................................23

Chapter 4

Functional Details ............................................................................................................................... 24

Thermocouple measurements ........................................................................................................................... 24

Cold junction compensation (CJC) ..................................................................................................................................24

Data linearization .............................................................................................................................................................24

Open-thermocouple detection (OTD) ..............................................................................................................................24

RTD and thermistor measurements (OM-WEB-TEMP only) .......................................................................... 24

Data linearization .............................................................................................................................................................25

External components ........................................................................................................................................ 25

Screw terminals................................................................................................................................................................25

Ethernet port ....................................................................................................................................................................25

External power connector ................................................................................................................................................25

Status LEDs .....................................................................................................................................................................26

Digital logic voltage switch .............................................................................................................................................26

Factory default reset button..............................................................................................................................................26

Chapter 5

Ethernet Troubleshooting .................................................................................................................. 27

Check the OM-WEB Series device status LEDs .............................................................................................. 27

Check the network settings on the computer .................................................................................................... 28

Check whether DHCP is enabled on the network server ..................................................................................................28

Verify that the computer is connected to the network ...................................................................................... 28

Verify the network path to the OM-WEB Series device .................................................................................. 29

Verify the network path to a remote OM-WEB Series device ......................................................................... 30

Check cached information ................................................................................................................................ 30

Deleting a NetBIOS table entry .......................................................................................................................................30

Deleting an ARP table .....................................................................................................................................................30

Getting help ...................................................................................................................................................... 30

Chapter 6

Specifications ...................................................................................................................................... 31

Analog input ..................................................................................................................................................... 31

Channel configurations ..................................................................................................................................... 32

Compatible sensors ........................................................................................................................................... 32

Accuracy ........................................................................................................................................................... 33

Thermocouple measurement accuracy .............................................................................................................................33

Semiconductor sensor measurement accuracy .................................................................................................................34

RTD measurement accuracy ............................................................................................................................................34

Thermistor measurement accuracy ..................................................................................................................................35

Throughput rate ................................................................................................................................................ 36

Digital input/output........................................................................................................................................... 36

Temperature alarms .......................................................................................................................................... 37

Memory ............................................................................................................................................................ 37

Microcontroller ................................................................................................................................................. 37

Power ................................................................................................................................................................ 37

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OM-WEB Series User's Guide

Network ............................................................................................................................................................ 38

Ethernet compliance ........................................................................................................................................................38

Ethernet connection .........................................................................................................................................................38

Network factory default settings ......................................................................................................................................38

Network protocols ............................................................................................................................................................39

Network security ..............................................................................................................................................................39

LED displays and the factory reset button ........................................................................................................ 39

Current excitation outputs (OM-WEB-TEMP) ................................................................................................ 40

Environmental .................................................................................................................................................. 40

Mechanical ....................................................................................................................................................... 40

Screw terminal connector type and pinout........................................................................................................ 41

5

About this User’s Guide

What you will learn from this user’s guide

This user's guide describes the Omega Engineering OM-WEB Series data acquisition devices and lists device
specifications.

Conventions in this user's guide

For more information about …

Text presented in a box signifies additional information and helpful hints related to the subject matter you are
reading.

Caution! Shaded caution statements present information to help you avoid injuring yourself and others,

damaging your hardware, or losing your data.

bold text Bold text is used for the names of objects on a screen, such as buttons, text boxes, and check boxes.

italic text Italic text is used for the names of manuals and help topic titles, and to emphasize a word or phrase.

Preface

Where to find more information

Additional information about OM-WEB Series hardware is available on our website at www.omega.com. You
can also contact Omega Engineering by phone, fax, or email with specific questions.

 Phone: [phone]
 Fax: [phone]
 Email:

[email protected]

6