Measurement WEB-TC User Manual

WEB-TC

Thermocouple Measurement

User's Guide

Document Revision 3, March, 2010

HM WEB-TC.doc

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Table of Contents

Preface

About this User’s Guide ....................................................................................................................... 7

What you will learn from this user’s guide ......................................................................................................... 7

Conventions in this user’s guide ......................................................................................................................... 7

Where to find more information ......................................................................................................................... 7

Chapter 1

Introducing the WEB-TC ....................................................................................................................... 8

Web interface ...................................................................................................................................................... 8

TCP/IP connection ............................................................................................................................................................ 8

Browser requirement ......................................................................................................................................................... 8

WEB-TC features ............................................................................................................................................... 8

Thermocouple input channels ........................................................................................................................................... 8

Alarms .............................................................................................................................................................................. 9

Digital I/O channels ................................................................................................ .......................................................... 9

WEB-TC block diagram ..................................................................................................................................... 9

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

Chapter 2

Installing the WEB-TC ......................................................................................................................... 10

What comes with your WEB-TC shipment? .................................................................................................... 10

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

Additional documentation ................................................................................................................................................11

Unpacking the WEB-TC .................................................................................................................................. 11

Installing the software ...................................................................................................................................... 11

Connecting the AC power adapter .................................................................................................................... 11

Connecting the WEB-TC .................................................................................................................................. 11

Connecting to a LAN for communication within a network ............................................................................................12

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

Connecting the WEB-TC directly to a computer .............................................................................................................13

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

Logging in to a device ......................................................................................................................................................15

Configuring the WEB-TC using InstaCal ........................................................................................................ 15

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

Calibrating the WEB-TC .................................................................................................................................. 16

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

Chapter 3

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

Screw terminal pin out ...................................................................................................................................... 17

Thermocouple input terminals (C0H/C0L to C7H/C7L) .................................................................................................18

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

Digital terminals (DIO0 to DIO7) ....................................................................................................................................18

Pull-up/down terminal (PU/D) .........................................................................................................................................19

Ground terminals (AGND and GND) ..............................................................................................................................19

Power terminal (+5V) ......................................................................................................................................................19

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

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

Digital I/O connections ..................................................................................................................................... 20

Configuring the DIO channels to generate alarms ...........................................................................................................20

WEB-TC User's Guide

Chapter 4

Functional Details ............................................................................................................................... 21

Thermocouple measurements ........................................................................................................................... 21

Cold junction compensation (CJC) ..................................................................................................................................21

Data linearization .............................................................................................................................................................21

Open-thermocouple detection (OTD) ..............................................................................................................................21

External components ........................................................................................................................................ 21

Screw terminals................................................................................................................................................................22

Ethernet port ....................................................................................................................................................................22

External power connector ................................................................................................................................................22

POWER/COMM LED .....................................................................................................................................................22

LINK/ACTIVITY LED ...................................................................................................................................................23

Digital logic voltage switch .............................................................................................................................................23

Factory default reset button..............................................................................................................................................23

Chapter 5

Ethernet Troubleshooting .................................................................................................................. 24

Check the WEB-TC status LEDs ..................................................................................................................... 24

Check the network settings on the computer .................................................................................................... 25

Check whether DHCP is enabled on the network server ..................................................................................................25

Verify that the computer is connected to the network ...................................................................................... 25

Verify the network path to the WEB-TC .......................................................................................................... 26

Verify the network path to a remote WEB-TC ................................................................................................. 27

Check cached information ................................................................................................................................ 27

Deleting a NetBIOS table entry .......................................................................................................................................27

Deleting an ARP table .....................................................................................................................................................27

Getting help ...................................................................................................................................................... 27

Chapter 6

Specifications ...................................................................................................................................... 28

Analog input ..................................................................................................................................................... 28

Channel configurations ..................................................................................................................................... 28

Compatible thermocouples ............................................................................................................................... 29

Accuracy ........................................................................................................................................................... 29

Thermocouple measurement accuracy .............................................................................................................................29

Throughput rate ................................................................................................................................................ 30

Digital input/output........................................................................................................................................... 31

Temperature alarms .......................................................................................................................................... 31

Memory ............................................................................................................................................................ 31

Microcontroller ................................................................................................................................................. 31

Power ................................................................................................................................................................ 32

Network ............................................................................................................................................................ 32

Ethernet compliance ........................................................................................................................................................32

Ethernet connection .........................................................................................................................................................32

Network factory default settings ......................................................................................................................................32

Network protocols ............................................................................................................................................................33

Network security ..............................................................................................................................................................33

LED displays and the factory reset button ........................................................................................................ 33

Environment ..................................................................................................................................................... 33

Mechanical ....................................................................................................................................................... 33

Screw terminal connector type and pin out....................................................................................................... 34

Declaration of Conformity .................................................................................................................. 35

Preface

About this User’s Guide

What you will learn from this user’s guide

This user’s guide explains how to install, configure, and use the WEB-TC so that you get the most out of its web-server based thermocouple measurement features.

This user’s guide also refers you to related documents available on our web site, and to technical support resources.

Conventions in this user’s guide

For more information on …

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.

< : > Angle brackets that enclose numbers separated by a colon signify a range of numbers, such as those assigned

to registers, bit settings, etc.

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

example:

1. Insert the disk or CD and click the OK button.

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

example: The InstaCal installation procedure is explained in the Quick Start Guide. Never touch the exposed pins or circuit connections on the board.

Where to find more information

For additional information relevant to the operation of your hardware, refer to the Documents subdirectory where you installed the MCC DAQ software (C:\Program Files\Measurement Computing\DAQ by default), or search for your device on our website at www.mccdaq.com.

Chapter 1

Introducing the WEB-TC

The WEB-TC is a thermocouple measurement device with a built-in web server. You can connect the device to an Ethernet port or hub, start up your browser, and view current data.

The WEB-TC is fully supported by the Universal Library and TracerDAQ. These software programs are included on the Measurement Computing Data Acquisition Software CD.

Web interface

The WEB-TC's embedded web interface provides access to current data and configuration settings using a standard web browser.

Browse to the device's home page by entering the URL that is printed on the device into the browser. View current thermocouple measurements and channel data, and configure hardware options from the device's home page. Only one user can change configuration options on the device at a time.

The web interface is built into the device's firmware, and does not need to be installed on a computer. No external software is required other than a web browser and a TCP/IP connection.

TCP/IP connection

A TCP/IP connection is required to access the web interface. Connect the device's 10Base-T Ethernet port to a local or wide area network using the supplied Ethernet cable, to a single computer through a hub using the supplied Ethernet cable, or directly to a computer using a standard CAT-5 crossover cable.

Browser requirement

The web browser used to access the WEB-TC's web interface must support JavaScript. The web interface was tested with the following browsers for compatibility:

 Mozilla Firefox™ 2.x  Microsoft Internet Explorer® 6.x  Microsoft Internet Explorer® 7.x

WEB-TC features

The WEB-TC provides eight thermocouple channels and eight digital I/O channels. An external supply shipped with the device provides power. On-board LEDs display the status of communication and external power.

All hardware configurable options are selectable with the web browser or InstaCal. Network configurable options are settable with InstaCal. When using InstaCal, if the login settings have been changed from the default, a login name and password are required to change the configuration settings.

Thermocouple input channels

The WEB-TC provides eight differential thermocouple input channels. A 24-bit analog-to-digital (A/D) converter is provided for each pair of analog inputs.

You can take measurements from type J, K, R, S, T, N, E, and B thermocouples. The thermocouple type is software programmable for each channel.

Four cold junction compensation (CJC) sensors are provided for thermocouple measurements. Each CJC sensor is dedicated to two thermocouple input channels. An open thermocouple detection feature lets you detect a broken thermocouple. An on-board microprocessor automatically linearizes the measurement data.

WEB-TC User's Guide Introducing the WEB-TC

Alarms

The WEB-TC features eight independent temperature alarms. Each alarm controls an associated digital I/O channel as an alarm output. The input to each alarm is one of the temperature input channels. The output of each alarm is software-configurable as active high or low. The user-configurable threshold conditions activate each alarm. When an alarm is activated, the associated DIO channel is driven to the active output state selected.

Digital I/O channels

Eight digital I/O channels are provided to communicate with external devices and to generate alarms. The digital bits are software programmable for input or output. The digital output voltage is switch-selectable for

3.3 V or 5 V logic. A screw terminal is provided for pull-up or pull-down configuration. The digital I/O channels power up in input mode unless the bit is configured for an alarm. When a digital bit is

configured as an alarm, that bit is configured as an output and assumes the state defined by the alarm configuration.

If you need to log data or display data graphically

The WEB-TC displays current data read from the device, and does not log or store historical data. For logging or trending needs, use the TracerDAQ software included on the Measurement Computing Data Acquisition Software CD.

WEB-TC block diagram

WEB-TC functions are illustrated in the block diagram shown here.

Figure 1. WEB-TC functional block diagram

Software features

For information on the features of InstaCal and the other software included with your WEB-TC, refer to the Quick Start Guide that shipped with your device.

Installing the WEB-TC

What comes with your WEB-TC shipment?

The following items are shipped with the WEB-TC.

Hardware

 WEB-TC

Chapter 2

 Ethernet cable (standard)

You can optionally purchase a crossover cable (CAT-5 or higher) to connect the WEB-TC to an Ethernet card installed in a computer.

 External power supply and cord – 10 watt AC power adapter. MCC part number PS-5V2AEPS.

WEB-TC User's Guide Installing the WEB-TC

Additional documentation

In addition to this hardware user's guide, you should also receive the Quick Start Guide (available in PDF at

www.mccdaq.com/PDFmanuals/DAQ-Software-Quick-Start.pdf). This booklet supplies a brief description of

the software you received with your WEB-TC and information regarding installation of that software. Please read this booklet completely before installing any software or hardware.

An overview of installation options is provided in the WEB-TC setup options page that ships with the device. Detailed installation information is provided in this user’s guide.

Unpacking the WEB-TC

As with any electronic device, you should take care while handling to avoid damage from static electricity. Before removing the WEB-TC from its packaging, ground yourself using a wrist strap or by simply touching the computer chassis or other grounded object to eliminate any stored static charge.

If your WEB-TC is damaged, notify Measurement Computing Corporation immediately by phone, fax, or email.

 Phone: 508-946-5100 and follow the instructions for reaching Tech Support.  Fax: 508-946-9500 to the attention of Tech Support  Email: techsupport@mccdaq.com

For international customers, contact the local distributor where you purchased the WEB-TC. Click on this link

www.measurementcomputing.com/sales.asp to locate your distributor.

Installing the software

Refer to the Quick Start Guide for instructions on installing the software on the Measurement Computing Data Acquisition Software CD. This booklet is available in PDF at www.mccdaq.com/PDFmanuals/DAQ-Software-

Quick-Start.pdf.

Connecting the AC power adapter

Power to the WEB-TC is provided with the 10 watt AC power adapter (PS-5V2AEPS). Connect the adapter cord to the power connector on the WEB-TC device, and plug the AC adapter into an electrical outlet.

The POWER/COMM LED illuminates when +5 V power is supplied to the WEB-TC. If the voltage supply is less than +4.75 V or more than +5.25 V, the POWER/COMM LED will not light.

Refer to Figure 5 on page 22 for the location of the POWER/COMM LED.

Connecting the WEB-TC

A TCP/IP connection between the WEB-TC and the network or computer is required to access the device's web interface. A 10Base-T compatible Ethernet port, hub, or switch is required.

You can connect the WEB-TC using the following configurations:  Connect to your Local Area Network (LAN) for communication within a private network/intranet; refer to

the procedure on page 12.

 Connect to your LAN for communication across networks (communicate over the internet, for example);

refer to the procedure on page 12.

 Connect directly to a computer's Ethernet port for local access (requires a crossover cable (not provided) or

network hub); refer to the procedure on page 13.

Use the standard Ethernet cable provided to connect the WEB-TC to a TCP/IP-based local or wide area network, or to connect to a single PC through a hub or switch. Use a CAT-5 or higher crossover cable (not provided) to connect the WEB-TC to an Ethernet card installed in a computer.

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