Campbell Scientific CR9000X Measurement and Control System - Manual (Page 427)

Appendix E. Glossary
period average a measurement technique utilizing a high-frequency digital
clock to measure time differences between signal transitions. Sensors
commonly measured with period average include vibrating wire
transducers and water content reflectometers.
peripheral any device designed for use with, and requiring, the CR1000 (or
another CSI datalogger) to operate.
Ping a software utility that attempts to contact another specific device in a
network.
precision a measure of the repeatability of a measurement. See also Section 0
Accuracy, Precision, and Resolution.
print device any device capable of receiving output over pin 6 (the PE line) in
a receive-only mode. Printers, "dumb" terminals, and computers in a
terminal mode fall in this category.
print peripheral see Print Device.
processing instructions these Instructions allow the user to further process
input data values and return the result to Input Storage where it can be
accessed for output processing. Arithmetic and transcendental functions
are included in these Instructions.
program control instructions used to modify the sequence of execution of
Instructions contained in Program Tables; also used to set or clear flags.
Poisson Ratio a ratio used in strain measurements equal to transverse strain
divided by extension strain. v = -(ε
trans
/ ε
axial
).
Public a CRBASIC command for declaring and dimensioning variables.
Variables declared with PUBLIC can be monitored during datalogger
operation.
pulse an electrical signal characterized by a sudden increase in voltage follow
by a short plateau and a sudden voltage decrease.
regulator a device for conditioning an electrical power source. CSI regulators
typically condition AC or DC voltages greater than 16 V to about 14
VDC.
resistance a feature of an electronic circuit that impedes or redirects the flow
of electrons through the circuit.
resistor a device that provides a known quantity of resistance.
resolution a measure of the fineness of a measurement. See also Section 0
Accuracy, Precision, and Resolution.
ring line (Pin 3) line pulled high by an external device to "awaken" the
CR1000.
Ring Memory a memory configuration for data tables allowing the oldest data
to be overwritten. This is the default setting for data tables.
E-7