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G-4
2000-OSM, F1
GLOSSARY (continued)
Post Analysis
the portion of the controller program that calculates the value for the
routine
components from the collected data, after completion of the analysis
Postan
abbreviation for the post analysis routine
PROM
Programmable Read Only Memory
PSFC
Process Supercritical Fluid Analyzer
psia
pounds per square inch absolute
psig
pounds per square inch gauge
RAM
Random Access Memory; contains current operating conditions
ROM
Read Only Memory; contains the executable program
redundant
the means by which a remote GCC can be connected to one or two
highways
central devices by two separate, but equivalent, data highways
response factor
numeric value determined by calibration; used in calculating concentration
retention time
the time, from the start of analysis, that a peak maximum elutes from the
column
RFI
Radio Frequency Interference
RS-232
voltage based electrical communications protocol, short range; common
term for EIA RS-232 serial data interchange format
SBC
Single Board Computer PCB
selection field
horizontal screen display; Right and Left cursor keys move through options
printed on screen; make selection by leaving field with Up or Down cursor key
slope detect
a technique of chromatographic data collection in which the controller
automatically ascertains the presence of a peak and collects data accordingly
S.O.
Sales Order (Customer Order)
Soft Keys
four front panel control keys directly under the screen
stream purging
the procedure allowing the next stream sample to be analyzed to flow
continuously through the sample loop of the injection valve in preparation
for the next sample injection and analysis cycle
stream step
TCF command that permits the next stream sample to purge the sample
loop during the remainder of the present cycle
TCF
Time-Coded Function; keystroke command sequence; entry in method table that
defines what action is to be performed (e.g. Valve ON) at what time in the
analysis
text field
field that accepts data entered with all non-terminating keys