Owner's manual

OM-USB-TEMP User's Guide Installing the OM-USB-TEMP

Installing the software

Refer to the OMB-DAQ-2416 Series and OM-USB Series Software User’s Guide for instructions on installing

the software on the OMB-DAQ-2416 Series and OM-USB Series Data Acquisition Software CD. This booklet is

available in PDF at http://omega.com/manuals.

We recommend that you download the latest Windows Update onto your computer before installing and

operating the OM-USB-TEMP.

Installing the OM-USB-TEMP

To connect the OM-USB-TEMP to your system, turn your computer on, and connect the USB cable to a USB

port on your computer or to an external USB hub that is connected to your computer. The USB cable provides

power and communication to the OM-USB-TEMP.

When you connect the OM-USB-TEMP for the first time, a

Found New Hardware popup balloon (Windows

XP) or dialog (other Windows versions) opens as the OM-USB-TEMP is detected. When this balloon or dialog

closes, the installation is complete. The

USB LED should flash and then remain lit. This indicates that

communication is established between the OM-USB-TEMP and your computer.

Caution! Do not disconnect any device from the USB bus while the computer is communicating with the

OM-USB-TEMP, or you may lose data and/or your ability to communicate with the OM-USB-

TEMP.

If the LED turns off

If the LED is lit but then turns off, the computer has lost communication with the OM-USB-TEMP. To restore

communication, disconnect the USB cable from the computer, and then reconnect it. This should restore

communication, and the LED should turn back on.

Configuring the OM-USB-TEMP

All hardware configuration options on the OM-USB-TEMP are programmable with software. Use InstaCal to set

the sensor type for each channel. The configurable options dynamically update according to the selected sensor

category. Configuration options are stored on the OM-USB-TEMP 's isolated microcontroller in EEPROM,

which is non-volatile memory on the OM-USB-TEMP module. Configuration options are loaded on power up.

Default configuration

The factory default configuration is Disabled. The Disabled mode disconnects the analog inputs from the

terminal blocks and internally grounds all of the A/D inputs. This mode also disables each of the current

excitation sources.

Warm up

Allow the OM-USB-TEMP to warm up for 30 minutes before taking measurements. This warm up time

minimizes thermal drift and achieves the specified rated accuracy of measurements.

For RTD or thermistor measurements, this warm-up time is also required to stabilize the internal current

reference.

Calibrating the OM-USB-TEMP

The OM-USB-TEMP is fully calibrated via software. InstaCal prompts you to run its calibration utility when

you change from one sensor category to another.

Allow the OM-USB-TEMP to operate for at least 30 minutes before calibrating. This warm up time minimizes

thermal drift and achieves the specified rated accuracy of measurements.