Glossary E-1
January 2006
Depression Capability The temperature difference by which the chilled mirror can be
lowered from the ambient temperature.
Network A Local Area computer Network (LAN) or Wide Area Network
(WAN) such as the Internet. The Optica can be operated or
programmed remotely over a network.
PACER GE Infrastructure Sensing patented Programmable Automatic
Contaminant Error Reduction system, which consolidates soluble
contaminants to reduce their effect on system accuracy (see The
PACER Cycle on page 1-6).
Parameter A measured quantity available for display by the unit, such as Dew
Point in °C, Humidity in Grams/Kilograms, or Pressure in Bar.
Process Pressure The gas pressure of the system under test. In some applications,
humidity of this gas may be measured at a lower pressure.
Scaling The process of selecting the maximum and minimum output values of
a chosen parameter.
SHIFT Pressing the SHIFT key enters Shift Key mode, reversing the direction
of the cursor motion when pressing TAB, and accessing the non-
numeric characters on the keypad.
Softkeys The four keys to the right of the display. The functions of these keys
change depending on the context, and the current function is
displayed to the left of each key.
VGA Video Graphics Array Generic description of a 640 by 480 pixel
display; used to identify the large-screen Optica.
4x40 Four lines by 40 characters per line; used to identify the small-screen
Optica.
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