Measurement Computing USB-2408 Series - Manual (Page 9)

USB-2408 Series User's Guide Installing a USB-2408 Series Device
9
Caution! Do not disconnect any device from the USB bus while the computer is communicating with the
USB-2408 Series device, or you may lose data and/or your ability to communicate with the
device.
If the Status LED turns off
If the Status LED turns on but then turns off, the computer has lost communication with the USB-2408 Series
device. To restore communication, disconnect the USB cable from the computer and then reconnect it. This
should restore communication, and the
Status LED should turn on.
Calibrating
Factory calibration
The Measurement Computing Manufacturing Test department performs the initial factory calibration. Contact
Measurement Computing for details about how to return your device and have it calibrated to the factory
specifications.
Field calibration
USB-2408 Series hardware supports field calibration. You should calibrate the device with InstaCal whenever
the ambient temperature changes by more than ±10 °C from the last calibration.