Measurement Computing WEB-TC - Manual (Page 8)

8
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.