Measurement Computing USB-TC-AI - Manual (Page 9)

USB-TC-AI User's Guide Installing the USB-TC-AI
9
Configuring the hardware
All hardware configuration options on the USB-TC-AI are programmable with software. Use InstaCal to set the
thermocouple type for each channel pair.
Use InstaCal to set the thermocouple type for each for each pair of temperature channels, and the range and
input configuration of each voltage channel. Any channel you don’t intend to use should be left disabled.
Configuration options are stored on the USB-TC-AI 's isolated microcontroller in EEPROM, which is non-
volatile memory on the USB-TC-AI module. Configuration options are loaded on power up. The factory default
configuration is Type J thermocouple.
Default configuration
The factory default configuration for the voltage inputs is Disabled. The Disabled mode disconnects the analog
inputs from the terminal blocks and internally grounds all of the A/D inputs.
Warm up
Allow the USB-TC-AI to warm up for 30 minutes after powering up before taking measurements. This warm up
time minimizes thermal drift and achieves the specified rated accuracy of measurements.
Calibrating the hardware
The USB-TC-AI is fully calibrated via InstaCal. Allow the USB-TC-AI to operate for at least 30 minutes before
calibrating. This warm up time minimizes thermal drift and achieves the specified rated accuracy of
measurements.