Campbell-scientific LoggerNet Datalogger Support Software Bedienungsanleitung PDF herunterladen (Seite 491)

Appendix A. Glossary of Terms

PROM – Programmable Read-Only Memory ─ integrated circuit chips that are

used to store the Operating System (OS) in the CR10T datalogger and some

other communications peripherals. The PROM can be replaced to install a new

operating system (also see EEPROM).

Pulse Channel – Some sensors output voltage pulse signals. Such sensors can

be connected to Pulse Channels for measurement (labeled as P1, P2, etc., on

the datalogger’s wiring panel).

Quiescent Mode – Often referred to as “sleep mode” – a low power state

between program execution intervals.

Real-Time Clock – All dataloggers have an internal clock. The date and time

information from this clock are used in the time stamp for stored data. The

datalogger’s execution interval and timer are synchronized with the clock.

Some Edlog dataloggers (CR10X, CR510, and CR23X) and all CRBasic

dataloggers have battery backups that maintain the clock even when 12V

power is not available.

Record – A group of data values output at the same time to the same data

table. Records are written in response to the Data Table Instruction (84) in TD

dataloggers or the DataTable declaration in CRBasic dataloggers. The

individual fields within each record are determined by the Output Processing

instructions following the instruction that created the data table.

RecNbr – An entry in a table that shows the sequential record number in the

table.

Remote Site – Typically where a datalogger is located at the other end of a

communications link. Also can refer to the site where a radio (RF) repeater is

located.

Repeater – a radio (RF) site that relays packets of information to a remote site.

Used to extend the range of radio transmissions. Most remote datalogger sites

with radios can act as repeaters.

Retries – When a transaction or communication between two devices or

programs fails, the transaction or communication can often be triggered to

repeat until it succeeds.

Retrieval – (see Data Retrieval).

RF – Radio Frequency.

RTDM – Real Time Data Monitor software. A very sophisticated graphical

data display application that gets data from either data files or the

communication server’s data cache. RTDM is a stand-alone application.

RTMC – Real Time Monitoring and Control software. A client application to

the communications server that displays data from the server’s data cache

(only) and updates as new data is collected. RTMC is relatively easy to set up,

and ships with LoggerNet.

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Campbell-scientific LoggerNet Datalogger Support Software Bedienungsanleitung Seite 491