User manual

Glossary
NI-DAQ User Manual for PC Compatibles G-10 ni.com
RTD Resistive Temperature Detector—A metallic probe that measures
temperature based upon its coefficient of resistivity
RTSI Real-Time System Integration (bus). The National Instruments timing bus
that connects DAQ devices directly, by means of connectors on top of the
boards, for precise synchronization of functions.
S
S/s samples per second—used to express the rate at which a DAQ device
samples an analog signal
s seconds
S samples
Sample-and-Hold
(S/H)
a circuit that acquires and stores an analog voltage on a capacitor for a
short period of time
SCXI Signal Conditioning eXtensions for Instrumentation; the National
Instruments product line for conditioning low-level signals within an
external chassis near sensors.
SDK Software Development Kit
self-calibrating a property of a DAQ device that has an extremely stable onboard reference
and calibrates its own A/D and D/A circuits without manual adjustments
by the user
Single-Ended (SE)
Inputs
an analog input that is measured with respect to a common ground
slave See master/slave
software trigger a programmed event that triggers an event such as data acquisition
stage (NI 54XX boards only) an entry in a sequence list
STC System Timing Controller
synchronous (1) hardware—a property of an event that is synchronized to a reference
clock
(2) software—a property of a function that begins an operation and returns
only when the operation is complete