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Advanced FEATURES of the M400E analyzer M400E Ozone Analyzer Operator’s Manual
7.1.5.2. Editing iDAS Triggering Events
Triggering events define when and how the iDAS records a measurement of any given data channel. Triggering
events are firmware-specific and a complete list of Triggers for this model analyzer can be found in Appendix A-
5. The most commonly used triggering events are:
ATIMER: Sampling at regular intervals specified by an automatic timer. Most trending information is
usually stored at such regular intervals, which can be instantaneous or averaged.
EXITZR, EXITSP, and SLPCHG (exit zero, exit span, slope change): Sampling at the end of (irregularly
occurring) calibrations or when the response slope changes. These triggering events create
instantaneous data points, e.g., for the new slope and offset (concentration response) values at the end
of a calibration. Zero and slope values are valuable to monitor response drift and to document when the
instrument was calibrated.
WARNINGS: Some data may be useful when stored if one of several warning messages appears such
as WTEMPW (GFC wheel temperature warning). This is helpful for trouble-shooting by monitoring when
a particular warning occurred.
To edit the list of data parameters associated with a specific data channel, follow the instruction shown in
Section 7.1.5 then press:
NOTE
A full list of iDAS Trigger Events can be found in Appendix A-5 of this manual
84 04315 Rev. C1