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Data Acquisition System (DAS) & APICOM Teledyne API T801 NDIR CO2 Analyzer Operation Manual
142
7.1.4.5. REPORT PERIODS IN PROGRESS WHEN INSTRUMENT IS POWERED OFF
If the instrument is powered off in the middle of a REPORT PERIOD, the
samples accumulated so far during that period are lost. Once the instrument is
turned back on, the DAS begins taking samples and temporarily storing them in
volatile memory as part of a new REPORT PERIOD. At the end of this
REPORT PERIOD, only the sample readings taken since the instrument was
turned back on will be included in any AVG, SDEV, MIN or MAX calculation.
Also, the STORE NUM SAMPLE feature will report the number of sample
readings taken since the instrument was restarted.
7.1.4.6. EDITING THE NUMBER OF RECORDS
Although the DAS is capable of capturing several months worth of data, the
actual number of records is also limited by the total number of parameters and
channels and other settings in the DAS configuration. Every additional data
channel, parameter, number of samples setting etc. will reduce the maximum
amount of data points somewhat. In general, however, the maximum data
capacity is divided amongst all channels (max: 20) and parameters (max: 50 per
channel).
The DAS will check the amount of available data space and prevent the user from
specifying too many records at any given point. If, for example, the DAS
memory space can accommodate 375 more data records, the ENTR button
disappears when trying to specify more than that number of records. This check
for memory space may also make an upload of a DAS configuration with
APICOM or a terminal program fail, if the combined number of records would be
exceeded. In this case, it is suggested to either try to determine what the
maximum number of records available is using the front panel interface or use
trial-and-error in designing the DAS script or calculate the number of records
using the DAS or APICOM manuals.
07274B DCN6418