Campbell Scientific CR1000KD CR800 and CR850 Measurement and Control Systems - Page 437

Section 11. Glossary Neighbor Device Devices in a PakBus® network that can communicate directly with an individual device without being routed through an intermediate device. See PakBus (p. 438). NIST National Institute of Standards and Technology Node Part of the description of a datalogger network when using LoggerNet. Each node represents a device that the communications server will dial through or communicate with individually. Nodes are organized as a hierarchy with all nodes accessed by the same device (parent node) entered as child nodes. A node can be both a parent and a child. NSEC Eight‐byte data type divided up as four bytes of seconds since 1990 and four bytes of nanoseconds into the second. Null‐modem A device, usually a multi‐conductor cable, which converts an RS‐232 port from DCE to DTE or from DTE to DCE. offset a term, often a parameter in a CRBasic measurement instruction, to designate the y‐intercept, shifting factor, or zeroing factor in a linear function. For example, when converting °C to °F, the equation is °F = °C*1.8 + 32. The factor 32 is the offset. Ohm The unit of resistance. Symbol is the Greek letter Omega (Ω). 1.0 Ω equals the ratio of 1.0 Volt divided by 1.0 Amp. Ohm's Law Describes the relationship of current and resistance to voltage. Voltage equals the product of current and resistance (V = I*R). on‐line data transfer Routine transfer of data to a peripheral left on‐site. Transfer is controlled by the program entered in the datalogger. 437