Campbell Scientific CR3000 CR3000 Micrologger - Page 461

Section 11. Glossary multi‐meter An inexpensive and readily available device useful in troubleshooting data‐acquisition system faults. multipler a term, often a parameter in a CRBasic measurement instruction, to designate the slope, scaling factor, or gain in a linear function. For example, when converting °C to °F, the equation is °F = °C*1.8 + 32. The factor 1.8 is the multiplier. mV The SI abbreviation for milliVolts. NAN Not a number. A data word indicating a measurement or processing error. Voltage over‐range, SDI‐12 sensor error, and undefined mathematical results can produce NAN. 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. 463). 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. 461