Teledyne GFC-7001T - Trace CO Analyzer - Manual (Page 171)

DAC and APICONTeledyne API – Model T300/T300M CO Analyzer
Teledyne Analytical Instruments 171
7.1.5. EDITING DAS TRIGGERING EVENTS
Triggering events define when and how the DAS records a measurement of any given
data channel. Triggering events are firmware-specific and are listed 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 troubleshooting by monitoring when a
particular warning occurrs.
To edit the list of data parameters associated with a specific data channel, follow the
instruction shown in Section 7.1.4 then press: