Campbell Scientific CR9000X Measurement and Control System User Manual

Page 422

Appendix E. Glossary

Boolean data type typically used for flags and to represent conditions or

hardware that have only two states (true of false) such as flags and control
ports.

BOOL8 A one byte data type that hold 8 bits (0 or 1) of information. BOOL8

uses less space than 32-bit BOOLEAN data type.

Callback is a name given to a process by which the CR1000 initiates

telecommunication with a PC running appropriate CSI datalogger support
software. Also known as “Initiate Telecommunications.”

CF abbreviation for CompactFlash

, a data storage card that uses flash

memory.

code a CRBASIC program, or a portion of a program.

constant a packet of CR1000 memory given an alpha-numeric name and

assigned a fixed number.

control I/O Terminals C1 - C8 or processes utilizing these terminals.

CVI Communications Verification Interval. The interval at which a PakBus®

device verifies the accessibility of neighbors in its neighbor list. If a
neighbor does not communicate for a period of time equal to 2.5 x the
CVI, the device will send up to 4 Hellos. If no response is received, the
neighbor is removed from the neighbor list.

CPU central processing unit. The brains of the CR1000.

CR10X older generation Campbell Scientific datalogger replaced by the

CR1000.

CR1000KD an optional hand-held keyboard display for use with the CR1000

and CR800 dataloggers.

CRD a flash memory card or the memory drive that resides on the flash card.

CS I/O Campbell Scientific Input / Output. A proprietary serial

communications protocol.

datalogger support software includes PC200W, PC400, RTDAQ,

LoggerNetTM

data point a data value which is sent to Final Storage as the result of an output

processing (data storage) instruction. Strings of data points output at the
same time make up a record in a data table.

DC see VDC.

DCE data communications equipment. While the term has much wider

meaning, in the limited context of practical use with the CR1000, it
denotes the pin configuration, gender and function of an RS-232 port.
The RS-232 port on the CR1000 and on many 3

party

telecommunications devices, such as a digital cellular modems, are DCE.
Interfacing a DCE device to a DCE device requires a null-modem cable.

desiccant a material that absorbs water vapor to dry the surrounding air.

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