Campbell CR3000 Micrologger, Руководство оператора

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Section 11. Glossary
537
Term: Dim
A CRBasic command for declaring and dimensioning variables. Variables
declared with Dim remain hidden during datalogger operations.
Term: dimension
Verb. To code a CRBasic program for a variable array as shown in the
following examples:
o
DIM example(3) creates the three variables example(1),
example(2), and example(3).
o
DIM example(3,3) creates nine variables.
o DIM example(3,3,3) creates 27 variables.
Term: DNS
Domain name system. A TCP/IP application protocol.
Term: DTE
Data Terminal Equipment. While the term has much wider meaning, in the
limited context of practical use with the CR3000, it denotes the pin
configuration, gender, and function of an RS-232 port. The RS-232 port on
the CR3000 is DCE. Attachment of a null-modem cable to a DCE device
effectively converts it to a DTE device. See DCE
(p. 536).
Term: duplex
A serial communication protocol. Serial communications can be simplex,
half-duplex, or full-duplex.
Reading list: simplex
(p. 555),
duplex
(p. 307),
half duplex
(p. 541),
and full duplex
(p.
540).
Term: duty cycle
The percentage of available time a feature is in an active state. For example,
if the CR3000 is programmed with 1 second scan interval, but the program
completes after only 100 millisecond, the program can be said to have a 10%
duty cycle.
Term: earth ground
A grounding rod or other suitable device that electrically ties a system or
device to the earth. Earth ground is a sink for electrical transients and