Rockwell Automation 441-PEN25 Enpac Ex Data Collector - Manual (Page 134)

Publication GMSI00-UM001A-EN-E - February 2005
Glossary 128
measurement
A measurement is a single reading collected from a location and controlled by
a measurement definition. Measurements are usually collected with a data
collector, and stored in the database. The measurement may be magnitude data
such as an overall displacement value, spectrum data such as a single
acceleration spectrum, or some other kind of data.
measurement definition
A measurement definition is a set of parameters that controls the collection of
a measurement. It defines the type of measurement (magnitude, spectrum,
time,...). It also includes the collection, measurement filter, and storage
specifications. Each measurement definition is attached to a location.
measurement filter
A filter that is applied when taking a measurement. It is specified as part of a
measurement definition, and my be either a band filter or other type of filter
such as an envelope or overall filter.
note codes
See inspection codes
numeric measurement
Also called process point. A single value that indicates the general condition of
a process or equipment. For example, numeric measurements can be used to
record any of the following: temperature, pressure, flow, valve position,
operating speed, operational hours.
operating system
The internal software of a data collector that determines how the data
collector operates. You should always use the most recent operating system
version available to you.
orders
Multiples of the operating speed of a piece of equipment. The first order is the
operating speed. The second order is two times the operating speed, and so
on.
overload
Occurs when the input signal from your transducer exceeds the current setting
of the data collector hardware. You should not collect data when the input
signal is generating an overload condition of the data collector; instead, you
should adjust the data collector settings for the transducer.