Campbell-scientific LoggerNet Datalogger Support Software Manual de usuario descargar pdf (Pagina 492)

Appendix A. Glossary of Terms

RTMS – Real-Time Monitoring Software. A software application designed by

Campbell Scientific for fast real-time data acquisition. RTMS included both

communications and graphical display features and was designed for IBM’s

OS/2 PC operating system and replaced by LoggerNet, RTMC and RTDM.

Scan Interval – See Execution Interval.

SDI-12 – SDI-12 stands for Serial Digital Interface at 1200 baud. It is an

electrical interface standard and communications protocol that was originally

developed by Campbell Scientific and other manufacturers for the U.S.

Geological Survey for hydrologic and environmental sensors. SDI-12 was

designed to be a simple interface (ground, 12 volts, and signal) that improves

compatibility between dataloggers and “smart” microprocessor-based sensors.

Other goals of the SDI-12 standard are:

• low power consumption for battery powered operation via the datalogger

• low system cost

• use of multiple sensors on one cable connected to one datalogger

• allow up to 200 feet of cable between a sensor and a datalogger

Security Code – A code entered into the datalogger either directly with a

keypad or via the datalogger’s program to prevent unauthorized access to

datalogger settings, programs, and data.

Server – Also “communication server”, a software application that accepts

connections from client applications and provides data or other information as

requested. The LoggerNet server manages all the communications and data

collection for a network of dataloggers. The collected data is made available

for client applications. PC200W and PC400 also use the communication server

but in a more limited configuration.

Short Cut – A program generator application that ships with PC400,

LoggerNet, and is available as a stand-alone product from the Campbell

Scientific website. Short Cut does not require knowledge of individual

program instructions. Users need only know what kind of datalogger and

sensors they’re using and decide what output they require. Short Cut generates

the program for them. (Contrast a “program generator” with the full-featured

“program editors”, Edlog and CRBasic Editor.)

Signature – Number calculated to verify both sequence and validity of bytes

within a packet or block of memory.

Single-ended Analog Input – Some analog sensors have only one signal wire.

(They will also have another wire that can be grounded and that is used as the

reference for the signal wire.) With this type of sensor, only one analog

connection is required. Hence, it needs a “single-ended” or SE analog input.

The single ended channels are marked as SE on the datalogger wiring panel.

Station – A datalogger site is often referred to as a station.

A-10

1 2 ... 487 488 489 490 491 492 493 494 495 496 497 ... 579 580

Sin comentarios

Campbell-scientific LoggerNet Datalogger Support Software Manual de usuario Pagina 492