Measurement Computing USB-1608HS-2AO - Manual (Page 12)

USB-1608HS-2AO User's Guide Installing the USB-1608HS-2AO
12
Caution! Do not disconnect any device from the USB bus while the computer is communicating with the
USB-1608HS-2AO, or you may lose data and/or your ability to communicate with the USB-
1608HS-2AO.
If the ACT LED turns off
If the ACT (active) LED lights up but then turns off, the computer has lost communication with the USB-
1608HS-2AO. To restore communication, disconnect the USB cable from the computer, and then reconnect it.
This should restore communication, and the LED should light up again.
Calibrating the USB-1608HS-2AO
The USB-1608HS-2AO is shipped fully-calibrated. Calibration coefficients are stored in EEPROM.
You can calibrate the analog inputs on the USB-1608HS-2AO with InstaCal. The normal calibration interval is
once per year.
Calibration is recommended whenever the USB-1608HS-2AO's ambient temperature changes by more than
±10 °C.
Allow the USB-1608HS-2AO to warm up for at least 30 minutes before starting the calibration.