Filter
Top Products
Data Acquisition System (DAS) and APICOM Teledyne API - T100 UV Fluorescence SO2 Analyzer
156
Table 7-3: DAS Data Parameter Functions
FUNCTION EFFECT
PARAMETER
Instrument-specific parameter name.
SAMPLE MODE INST: Records instantaneous reading.
AVG: Records average reading during reporting interval.
MIN: Records minimum (instantaneous) reading during reporting interval.
MAX: Records maximum (instantaneous) reading during reporting interval.
PRECISION
Decimal precision of parameter value (0-4).
STORE NUM. SAMPLES
OFF: stores only the average (default).
ON: stores the average and the number of samples in each average for a parameter. This
property is only useful when the AVG sample mode is used. Note that the number of
samples is the same for all parameters in one channel and needs to be specified only for
one of the parameters in that channel.
Users can specify up to 50 parameters per data channel (the T100 provides about 30
parameters). However, the number of parameters and channels is ultimately limited by
available memory.
7.1.3. 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 common 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, 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. This is helpful for trouble-shooting by monitoring when a
particular warning occurred.
7.2. DEFAULT DAS CHANNELS
A set of default Data Channels has been included in the analyzer’s software for logging
SO
2
concentration and certain predictive diagnostic data. These default channels include
but are not limited to:
CONC: Samples SO
2
concentration at one minute intervals and stores an average every
five minutes with a time and date stamp. Readings during calibration and calibration
hold off are not included in the data. By default, the last 4032 hourly averages are
stored.
PNUMTC: Collects sample flow and sample pressure data at five minute intervals and
stores an average once a day with a time and date stamp. This data is useful for
monitoring the condition of the pump and critical flow orifice (sample flow) and the
06807C DCN6650