Campbell CR3000 Micrologger, Руководство оператора

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Section 11. Glossary
549
BattV is the argument.
Term: period average
A measurement technique using a high-frequency digital clock to measure
time differences between signal transitions. Sensors commonly measured
with period average include water-content reflectometers.
Term: peripheral
Any device designed for use with the CR3000 (or another Campbell
Scientific datalogger). A peripheral requires the CR3000 to operate.
Peripherals include measurement, control
(p. 86),
and data retrieval and comms
(p. 610)
modules.
Term: ping
A software utility that attempts to contact another device in a network. See
section PakBus — Overview
(p. 82)
and sections Ping (PakBus) and Ping (IP)
(p. 474).
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. 161).
See sequential mode
(p. 554).
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 0.00
0010 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.