Table of Contents
Advertisement
Glossary
input impedance
input offset current
instrument driver
instrumentation
amplifier
integrating ADC
interrupt
interrupt level
I/O
I
OH
I
OL
IRQ
isolation
isolation voltage
PCI-4451/4452 User Manual
the measured resistance and capacitance between the input terminals of a
circuit
the difference in the input bias currents of the two inputs of an
instrumentation amplifier
a set of high-level software functions that controls a specific GPIB, VXI,
or RS-232 programmable instrument or a specific plug-in DAQ board.
Instrument drivers are available in several forms, ranging from a function
callable language to a virtual instrument (VI) in LabVIEW.
a circuit whose output voltage with respect to ground is proportional to the
difference between the voltages at its two inputs
an ADC whose output code represents the average value of the input
voltage over a given time interval
a computer signal indicating that the CPU should suspend its current task
to service a designated activity
the relative priority at which a device can interrupt
input/output—the transfer of data to/from a computer system involving
communications channels, operator interface devices, and/or data
acquisition and control interfaces
current, output high
current, output low
interrupt request
a type of signal conditioning in which you isolate the transducer signals
from the computer for safety purposes. This protects you and your
computer from large voltage spikes and makes sure the measurements from
the DAQ device are not affected by differences in ground potentials.
the voltage that an isolated circuit can normally withstand, usually
specified from input to input and/or from any input to the amplifier output,
or to the computer bus
G-10
© National Instruments Corporation
Advertisement
Table of Contents
