Campbell CR800 Series - Page 509

Section 11. Glossary
509
Term: ping
A software utility that attempts to contact another device in a network. See
section PakBus — Overview
(p. 77) and sections Ping (PakBus) and Ping (IP)
(p. 435).
Term: pipeline mode
A CRBasic program execution mode wherein instructions are evaluated in
groups of like instructions, with a set group prioritization. More information
is available in section Pipeline Mode
(p. 151). See sequential mode (p. 514).
Term: Poisson ratio
A ratio used in strain measurements. Equal to transverse strain divided by
extension strain as follows:
v = -(ε
trans
/ ε
axial
).
Term: ppm (resistor specification)
Temperature Coefficient of Resistance (TCR)
TCR tells how much the resistance of a resistor changes as the temperature of
the resistor changes. The unit of TCR is ppm/°C (parts-per-million per degree
Celsius). A positive TCR means that resistance increases as temperature
increases. For example, a resistor with a specification of 10 ppm/°C will not
increase in resistance by more than 0.000010 Ω per ohm over a 1 °C increase
of the resistor temperature or by more than .00010 Ω per ohm over a 10 °C
increase.
Term: precision
A measure of the repeatability of a measurement. Also see Accuracy,
Precision, and Resolution
(p. 522).
Term: PreserveVariables
CRBasic instruction that protects Public variables from being erased when a
program is recompiled.
Term: 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.