Inficon HAPSITE ER, Руководство по эксплуатации

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19 | Glossary INFICON
422 / 436 074-471-P1E HAPSITE ER Operating Manual
SDS Safety data sheet
Multiplier voltage The voltage applied to the multiplier in the mass spectrometer, which directly
effects the amplitude of signal and background noise.
NEG Non-evaporable getter. Used for vacuum maintenance.
NIST library NIST stands for National Institute of Standards and Technology Mass Spectral
Library. This is a library of spectra of compounds which can be searched to
tentatively identify unknown compounds.
Noise Check An option in the Tune program which checks the system for background noise.
The results of the noise check are used to discriminate against baseline noise
during analysis.
Pascal (pa) Unit of pressure, equal to 1 dyne per cm
2
. Equivalent to 7.5 x 10-3 Torr and 1.45 x
10-4 PSI.
PEEK A contamination resistant material used for a number of fittings in the HAPSITE
ER.
Phase The coating on the inside of the gas chromatograph column by which organic
vapors are retained.
PPB Parts per billion concentration level
PPE Personal protective equipment
PPM Parts per million concentration level
PPT Parts per trillion concentration level
Remote power Power supplied to the HAPSITE ER and Headspace sample system either from
the Service Module (for the HAPSITE ER) or external AC - 24 V(dc) converter.
Resolution These settings in the tune program affect the way the mass spectrometer
resolves peaks. Increasing the resolution narrows the peaks in that mass range,
while lowering the resolution will broaden the peaks.
Retention time The elapsed time from injection of a specific compound onto the column until the
compound exits the column (same as retention time).
Reverse search A function of the NIST search (tentative unknown identification) library which
allows compounds which are specified in the user library to be identified as part of
the search.
RH Relative humidity
RIC Reconstructed ion chromatogram. A presentation of the chromatographic record
which extracts from the TIC and displays the intensity of the ion or ions specified.
Round trip time The amount of time required to complete a scan of all the masses specified in a
SIM method. This includes the number of masses, integration time, number of
extra measurements, lead in time, and peak width.
RMA Return material authorization. Returning material cannot be sent back without this
assigned number.