USB-TEMP User's Guide
Installing the USB-TEMP
2-3
If the LED turns off
If the LED is lit but then turns off, the computer has lost communication with the 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 USB-TEMP
All hardware configuration options on the USB-TEMP are programmable with software. Use
Insta
Cal 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 USB-TEMP 's isolated microcontroller
in EEPROM, which is non-volatile memory on the 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 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 USB-TEMP
The USB-TEMP is fully calibrated via software.
Insta
Cal prompts you to run its calibration utility when
you change from one sensor category to another.
Allow the 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.
