Campbell Scientific CR1000KD CR800 and CR850 Measurement and Control Systems - Page 430

Section 11. Glossary 430 DHCP Dynamic Host Configuration Protocol. A TCP/IP application protocol. differential A sensor or measurement terminal wherein the analog voltage signal is carried on two leads. The phenomenon measured is proportional to the difference in voltage between the two leads. digital Numerically presented data. Dim A CRBasic command for declaring and dimensioning variables. Variables declared with Dim remain hidden during datalogger operations. dimension To code for a variable array. DIM example(3) creates the three variables example(1), example(2), and example(3). DIM example(3,3) creates nine variables. DIM example (3,3,3) creates 27 variables. DNS Domain name system. A TCP/IP application protocol. DTE Data terminal equipment. While the term has much wider meaning, in the limited context of practical use with the CR800, it denotes the pin configuration, gender, and function of an RS‐232 port. The RS‐232 port on the CR800 and on many third‐party telecommunications devices, such as a digital cellular modems, are DCE. Attachment of a null‐modem cable to a DCE device effectively converts it to a DTE device. Duplex Can be half or full. Full‐duplex is simultaneous, bidirectional data. Duplex The percentage of available time a feature is in an active state. For example, if the CR800 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.