Device Self-Calibration; Device Pinouts; Device Specifications - National Instruments USB-621 Series User Manual

Chapter 1 Getting Started

Device Self-Calibration

You can also programmatically self-calibrate your device with NI-DAQmx,
Note
as described in Device Calibration in the NI-DAQmx Help or the LabVIEW Help in
version 8.0 or later.

Device Pinouts

Device Specifications

NI USB-621x User Manual
NI recommends that you self-calibrate your USB-621x device after
installation and whenever the ambient temperature changes.
Self-calibration should be performed after the device has warmed up for the
recommended time period. Refer to the NI USB-621x Specifications to find
your device warm-up time. This function measures the onboard reference
voltage of the device and adjusts the self-calibration constants to account
for any errors caused by short-term fluctuations in the environment.
Disconnect all external signals when you self-calibrate a device.
You can initiate self-calibration using Measurement & Automation
Explorer (MAX), by completing the following steps.
1. Launch MAX.
2. Select My System»Devices and Interfaces»NI-DAQmx
Devices»your device.
3. Initiate self-calibration using one of the following methods:
• Click Self-Calibrate in the upper right corner of MAX.
• Right-click the name of the device in the MAX configuration tree
and select Self-Calibrate from the drop-down menu.
Refer to Appendix A,
pinouts.
Refer to the NI USB-621x Specifications, available on the NI-DAQ Device
Documentation Browser or from
information about USB-621x devices.
Device-Specific Information, for USB-621x device
ni.com/manuals
1-2
, for more detailed
ni.com