Campbell Scientific CR800 and CR850 Measurement and Control Systems - Manual (Page 439)

Section 11. Glossary
439
parameter
Argument or parameter? These terms are frequently interchanged, but
have a useful distinction. A parameter is part of a procedure (or
command) definition; an argument is part of a procedure call (or
command execution). An argument is place in a parameter. For
example, in the CRBasic command Battery(
dest ), dest is a parameter
and so defines what is to be put in its place. If a variable named BattV is
meant to hold the result of the battery measurement made by
Battery(),
BattV is the argument placed in dest . Example:
Battery(BattV)
BattV is the argument.
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 CR800 (or another
Campbell Scientific datalogger) to operate.
Ping
A software utility that attempts to contact another specific device in a
network.
Poisson Ratio
A ratio used in strain measurements equal to transverse strain divided
by extension strain. v = ‐(ε
trans
/ ε
axial
).
precision
A measure of the repeatability of a measurement. Also see the appendix
Accuracy, Precision, and Resolution
(p. 449).
PreserveVariables
PreserveVariables instruction protects Public variables from being
erased when a program is recompiled.