Measurement Computing WEB-TEMP - Manual (Page 7)

7
Chapter 1
Introducing the WEB-TEMP
The WEB-TEMP is a temperature 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-TEMP 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-TEMP embedded web interface provides access to current data and configuration settings using a
standard web browser.
Browse to the device home page by entering the URL that is printed on the device into the browser. View
current sensor measurements, channel data, and configure hardware options from the device's web pages. 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-TEMP 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-TEMP features
The WEB-TEMP provides eight temperature 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 configuration settings.
Temperature channels
The WEB-TEMP provides eight differential input channels that accept temperature sensor type inputs. A 24-bit
analog-to-digital (A/D) converter is provided for each pair of analog inputs. Each pair of inputs constitutes a
channel pair. Measurements are available from four sensor categories:
 Thermocouple – types J, K, R, S, T, N, E, and B
 Resistance temperature detectors (RTDs) – 2, 3, or 4-wire measurements of 100 Ω platinum RTDs
 Thermistors – 2, 3, or 4-wire measurements
 Semiconductor temperature sensors – LM35, TMP35 or equivalent
The sensor category is software programmable for each channel pair. Each channel pair can connect to a
different category of sensor. The sensor category between the channels that constitute a channel pair cannot be
mixed. However, thermocouple types within a channel pair can be mixed.